sp_sm2_cortexm.c

/* sp.c
 *
 * Copyright (C) 2006-2024 wolfSSL Inc.
 *
 * This file is part of wolfSSL.
 *
 * wolfSSL is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * wolfSSL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
 */

/* Implementation by Sean Parkinson. */

#ifdef HAVE_CONFIG_H
    #include <config.h>
#endif

#include <wolfssl/wolfcrypt/settings.h>

#if defined(WOLFSSL_HAVE_SP_RSA) || defined(WOLFSSL_HAVE_SP_DH) || \
    defined(WOLFSSL_HAVE_SP_ECC)

#include <wolfssl/wolfcrypt/error-crypt.h>
#include <wolfssl/wolfcrypt/cpuid.h>
#ifdef NO_INLINE
    #include <wolfssl/wolfcrypt/misc.h>
#else
    #define WOLFSSL_MISC_INCLUDED
    #include <wolfcrypt/src/misc.c>
#endif

#ifdef RSA_LOW_MEM
#ifndef WOLFSSL_SP_SMALL
#define WOLFSSL_SP_SMALL
#endif
#endif

#if defined(WOLFSSL_SMALL_STACK) && !defined(WOLFSSL_SP_NO_MALLOC)
#undef WOLFSSL_SP_SMALL_STACK
#define WOLFSSL_SP_SMALL_STACK
#endif

#include <wolfssl/wolfcrypt/sp.h>

#ifdef __IAR_SYSTEMS_ICC__
#define __asm__        asm
#define __volatile__   volatile
#define WOLFSSL_NO_VAR_ASSIGN_REG
#endif /* __IAR_SYSTEMS_ICC__ */
#ifdef __KEIL__
#define __asm__        __asm
#define __volatile__   volatile
#endif

#ifdef WOLFSSL_SP_ARM_CORTEX_M_ASM
#define SP_PRINT_NUM(var, name, total, words, bits)         \
    do {                                                    \
        int ii;                                             \
        fprintf(stderr, name "=0x");                        \
        for (ii = (((bits) + 31) / 32) - 1; ii >= 0; ii--)  \
            fprintf(stderr, SP_PRINT_FMT, (var)[ii]);       \
        fprintf(stderr, "\n");                              \
    } while (0)

#define SP_PRINT_VAL(var, name)                             \
    fprintf(stderr, name "=0x" SP_PRINT_FMT "\n", var)

#define SP_PRINT_INT(var, name)                             \
    fprintf(stderr, name "=%d\n", var)

#ifdef WOLFSSL_HAVE_SP_ECC
#ifdef WOLFSSL_SP_SM2

/* Point structure to use. */
typedef struct sp_point_256 {
    /* X ordinate of point. */
    sp_digit x[2 * 8];
    /* Y ordinate of point. */
    sp_digit y[2 * 8];
    /* Z ordinate of point. */
    sp_digit z[2 * 8];
    /* Indicates point is at infinity. */
    int infinity;
} sp_point_256;

/* The modulus (prime) of the curve SM2 P256. */
static const sp_digit p256_sm2_mod[8] = {
    0xffffffff,0xffffffff,0x00000000,0xffffffff,0xffffffff,0xffffffff,
    0xffffffff,0xfffffffe
};
/* The Montgomery normalizer for modulus of the curve P256. */
static const sp_digit p256_sm2_norm_mod[8] = {
    0x00000001,0x00000000,0xffffffff,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000001
};
/* The Montgomery multiplier for modulus of the curve P256. */
static const sp_digit p256_sm2_mp_mod = 0x00000001;
#if defined(WOLFSSL_VALIDATE_ECC_KEYGEN) || defined(HAVE_ECC_SIGN) || \
                                            defined(HAVE_ECC_VERIFY)
/* The order of the curve P256. */
static const sp_digit p256_sm2_order[8] = {
    0x39d54123,0x53bbf409,0x21c6052b,0x7203df6b,0xffffffff,0xffffffff,
    0xffffffff,0xfffffffe
};
#endif
/* The order of the curve P256 minus 2. */
static const sp_digit p256_sm2_order2[8] = {
    0x39d54121,0x53bbf409,0x21c6052b,0x7203df6b,0xffffffff,0xffffffff,
    0xffffffff,0xfffffffe
};
#if defined(HAVE_ECC_SIGN)
/* The Montgomery normalizer for order of the curve P256. */
static const sp_digit p256_sm2_norm_order[8] = {
    0xc62abedd,0xac440bf6,0xde39fad4,0x8dfc2094,0x00000000,0x00000000,
    0x00000000,0x00000001
};
#endif
#if defined(HAVE_ECC_SIGN)
/* The Montgomery multiplier for order of the curve P256. */
static const sp_digit p256_sm2_mp_order = 0x72350975;
#endif
/* The base point of curve P256. */
static const sp_point_256 p256_sm2_base = {
    /* X ordinate */
    {
        0x334c74c7,0x715a4589,0xf2660be1,0x8fe30bbf,0x6a39c994,0x5f990446,
        0x1f198119,0x32c4ae2c,
        (sp_digit)0, (sp_digit)0, (sp_digit)0, (sp_digit)0, (sp_digit)0,
        (sp_digit)0, (sp_digit)0, (sp_digit)0
    },
    /* Y ordinate */
    {
        0x2139f0a0,0x02df32e5,0xc62a4740,0xd0a9877c,0x6b692153,0x59bdcee3,
        0xf4f6779c,0xbc3736a2,
        (sp_digit)0, (sp_digit)0, (sp_digit)0, (sp_digit)0, (sp_digit)0,
        (sp_digit)0, (sp_digit)0, (sp_digit)0
    },
    /* Z ordinate */
    {
        0x00000001,0x00000000,0x00000000,0x00000000,0x00000000,0x00000000,
        0x00000000,0x00000000,
        (sp_digit)0, (sp_digit)0, (sp_digit)0, (sp_digit)0, (sp_digit)0,
        (sp_digit)0, (sp_digit)0, (sp_digit)0
    },
    /* infinity */
    0
};
#if defined(HAVE_ECC_CHECK_KEY) || defined(HAVE_COMP_KEY)
static const sp_digit p256_sm2_b[8] = {
    0x4d940e93,0xddbcbd41,0x15ab8f92,0xf39789f5,0xcf6509a7,0x4d5a9e4b,
    0x9d9f5e34,0x28e9fa9e
};
#endif

#ifdef WOLFSSL_SP_SMALL
/* Multiply a and b into r. (r = a * b)
 *
 * r  A single precision integer.
 * a  A single precision integer.
 * b  A single precision integer.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static void sp_256_mul_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p)
#else
static void sp_256_mul_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "SUB	sp, sp, #0x40\n\t"
        "LDR	lr, [%[a]]\n\t"
        "LDR	r11, [%[b]]\n\t"
        "UMULL	r8, r6, lr, r11\n\t"
        "STR	r8, [sp]\n\t"
        "MOV	r7, #0x0\n\t"
        "MOV	r8, #0x0\n\t"
        "MOV	r5, #0x4\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_mul_sm2_8_outer:\n\t"
#else
    "L_sp_256_mul_sm2_8_outer_%=:\n\t"
#endif
        "SUBS	r3, r5, #0x1c\n\t"
        "IT	cc\n\t"
        "MOVCC	r3, #0x0\n\t"
        "SUB	r4, r5, r3\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_mul_sm2_8_inner:\n\t"
#else
    "L_sp_256_mul_sm2_8_inner_%=:\n\t"
#endif
        "LDR	lr, [%[a], r3]\n\t"
        "LDR	r11, [%[b], r4]\n\t"
        "UMULL	r9, r10, lr, r11\n\t"
        "ADDS	r6, r6, r9\n\t"
        "ADCS	r7, r7, r10\n\t"
        "ADC	r8, r8, #0x0\n\t"
        "LDR	lr, [%[a], r4]\n\t"
        "LDR	r11, [%[b], r3]\n\t"
        "UMULL	r9, r10, lr, r11\n\t"
        "ADDS	r6, r6, r9\n\t"
        "ADCS	r7, r7, r10\n\t"
        "ADC	r8, r8, #0x0\n\t"
        "ADD	r3, r3, #0x4\n\t"
        "SUB	r4, r4, #0x4\n\t"
        "CMP	r3, r4\n\t"
#if defined(__GNUC__)
        "BGT	L_sp_256_mul_sm2_8_inner_done_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BGT.N	L_sp_256_mul_sm2_8_inner_done\n\t"
#else
        "BGT.N	L_sp_256_mul_sm2_8_inner_done_%=\n\t"
#endif
#if defined(__GNUC__)
        "BLT	L_sp_256_mul_sm2_8_inner_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BLT.N	L_sp_256_mul_sm2_8_inner\n\t"
#else
        "BLT.N	L_sp_256_mul_sm2_8_inner_%=\n\t"
#endif
        "LDR	lr, [%[a], r3]\n\t"
        "LDR	r11, [%[b], r3]\n\t"
        "UMULL	r9, r10, lr, r11\n\t"
        "ADDS	r6, r6, r9\n\t"
        "ADCS	r7, r7, r10\n\t"
        "ADC	r8, r8, #0x0\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_mul_sm2_8_inner_done:\n\t"
#else
    "L_sp_256_mul_sm2_8_inner_done_%=:\n\t"
#endif
        "STR	r6, [sp, r5]\n\t"
        "MOV	r6, r7\n\t"
        "MOV	r7, r8\n\t"
        "MOV	r8, #0x0\n\t"
        "ADD	r5, r5, #0x4\n\t"
        "CMP	r5, #0x34\n\t"
#if defined(__GNUC__)
        "BLE	L_sp_256_mul_sm2_8_outer_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BLE.N	L_sp_256_mul_sm2_8_outer\n\t"
#else
        "BLE.N	L_sp_256_mul_sm2_8_outer_%=\n\t"
#endif
        "LDR	lr, [%[a], #28]\n\t"
        "LDR	r11, [%[b], #28]\n\t"
        "UMLAL	r6, r7, lr, r11\n\t"
        "STR	r6, [sp, r5]\n\t"
        "ADD	r5, r5, #0x4\n\t"
        "STR	r7, [sp, r5]\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_mul_sm2_8_store:\n\t"
#else
    "L_sp_256_mul_sm2_8_store_%=:\n\t"
#endif
        "LDM	sp!, {r3, r4, r6, r7, r8, r9, r10, r11}\n\t"
        "STM	%[r]!, {r3, r4, r6, r7, r8, r9, r10, r11}\n\t"
        "SUBS	r5, r5, #0x20\n\t"
#if defined(__GNUC__)
        "BGT	L_sp_256_mul_sm2_8_store_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BGT.N	L_sp_256_mul_sm2_8_store\n\t"
#else
        "BGT.N	L_sp_256_mul_sm2_8_store_%=\n\t"
#endif
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "lr", "r11", "cc"
    );
}

#else
#ifdef WOLFSSL_ARM_ARCH_7M
/* Multiply a and b into r. (r = a * b)
 *
 * r  A single precision integer.
 * a  A single precision integer.
 * b  A single precision integer.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static void sp_256_mul_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p)
#else
SP_NOINLINE static void sp_256_mul_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "SUB	sp, sp, #0x24\n\t"
        "STR	%[r], [sp, #32]\n\t"
        "MOV	%[r], #0x0\n\t"
        "LDR	r12, [%[a]]\n\t"
        /* A[0] * B[0] */
        "LDR	lr, [%[b]]\n\t"
        "UMULL	r3, r4, r12, lr\n\t"
        /* A[0] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "UMULL	r5, r6, r12, lr\n\t"
        /* A[0] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "UMULL	r7, r8, r12, lr\n\t"
        /* A[0] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "UMULL	r9, r10, r12, lr\n\t"
        "STR	r3, [sp]\n\t"
        /* A[0] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "MOV	r11, %[r]\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[0] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADCS	r6, r6, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[0] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADCS	r8, r8, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[0] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADCS	r10, r10, #0x0\n\t"
        "ADC	r3, %[r], #0x0\n\t"
        "UMLAL	r10, r3, r12, lr\n\t"
        /* A[1] * B[0] */
        "LDR	r12, [%[a], #4]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "STR	r4, [sp, #4]\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[1] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[1] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[1] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[1] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[1] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[1] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[1] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r4, %[r], #0x0\n\t"
        "UMLAL	r3, r4, r12, lr\n\t"
        /* A[2] * B[0] */
        "LDR	r12, [%[a], #8]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "STR	r5, [sp, #8]\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[2] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[2] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[2] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[2] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[2] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[2] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[2] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r5, %[r], #0x0\n\t"
        "UMLAL	r4, r5, r12, lr\n\t"
        /* A[3] * B[0] */
        "LDR	r12, [%[a], #12]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "STR	r6, [sp, #12]\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[3] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[3] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[3] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[3] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[3] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[3] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[3] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r6, %[r], #0x0\n\t"
        "UMLAL	r5, r6, r12, lr\n\t"
        /* A[4] * B[0] */
        "LDR	r12, [%[a], #16]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "STR	r7, [sp, #16]\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[4] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[4] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[4] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[4] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[4] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[4] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[4] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r7, %[r], #0x0\n\t"
        "UMLAL	r6, r7, r12, lr\n\t"
        /* A[5] * B[0] */
        "LDR	r12, [%[a], #20]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "STR	r8, [sp, #20]\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[5] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[5] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[5] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[5] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[5] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[5] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[5] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r8, %[r], #0x0\n\t"
        "UMLAL	r7, r8, r12, lr\n\t"
        /* A[6] * B[0] */
        "LDR	r12, [%[a], #24]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "STR	r9, [sp, #24]\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[6] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[6] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[6] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[6] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[6] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[6] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[6] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r9, %[r], #0x0\n\t"
        "UMLAL	r8, r9, r12, lr\n\t"
        /* A[7] * B[0] */
        "LDR	r12, [%[a], #28]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "STR	r10, [sp, #28]\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[7] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[7] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[7] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[7] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[7] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[7] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[7] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r10, %[r], #0x0\n\t"
        "UMLAL	r9, r10, r12, lr\n\t"
        "LDR	%[r], [sp, #32]\n\t"
        "ADD	%[r], %[r], #0x20\n\t"
        "STM	%[r], {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        "LDM	sp, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        "SUB	%[r], %[r], #0x20\n\t"
        "STM	%[r], {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        "ADD	sp, sp, #0x24\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "lr", "cc"
    );
}

#else
/* Multiply a and b into r. (r = a * b)
 *
 * r  A single precision integer.
 * a  A single precision integer.
 * b  A single precision integer.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static void sp_256_mul_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p)
#else
SP_NOINLINE static void sp_256_mul_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "SUB	sp, sp, #0x2c\n\t"
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
        "STRD	%[r], %[a], [sp, #36]\n\t"
#else
        "STR	%[r], [sp, #36]\n\t"
        "STR	%[a], [sp, #40]\n\t"
#endif /* WOLFSSL_NO_VAR_ASSIGN_REG */
        "MOV	lr, %[b]\n\t"
        "LDM	%[a], {r0, r1, r2, r3}\n\t"
        "LDM	lr!, {r4, r5, r6}\n\t"
        "UMULL	r10, r11, r0, r4\n\t"
        "UMULL	r12, r7, r1, r4\n\t"
        "UMAAL	r11, r12, r0, r5\n\t"
        "UMULL	r8, r9, r2, r4\n\t"
        "UMAAL	r12, r8, r1, r5\n\t"
        "UMAAL	r12, r7, r0, r6\n\t"
        "UMAAL	r8, r9, r3, r4\n\t"
        "STM	sp, {r10, r11, r12}\n\t"
        "UMAAL	r7, r8, r2, r5\n\t"
        "LDM	lr!, {r4}\n\t"
        "UMULL	r10, r11, r1, r6\n\t"
        "UMAAL	r8, r9, r2, r6\n\t"
        "UMAAL	r7, r10, r0, r4\n\t"
        "UMAAL	r8, r11, r3, r5\n\t"
        "STR	r7, [sp, #12]\n\t"
        "UMAAL	r8, r10, r1, r4\n\t"
        "UMAAL	r9, r11, r3, r6\n\t"
        "UMAAL	r9, r10, r2, r4\n\t"
        "UMAAL	r10, r11, r3, r4\n\t"
        "LDM	lr, {r4, r5, r6, r7}\n\t"
        "MOV	r12, #0x0\n\t"
        "UMLAL	r8, r12, r0, r4\n\t"
        "UMAAL	r9, r12, r1, r4\n\t"
        "UMAAL	r10, r12, r2, r4\n\t"
        "UMAAL	r11, r12, r3, r4\n\t"
        "MOV	r4, #0x0\n\t"
        "UMLAL	r9, r4, r0, r5\n\t"
        "UMAAL	r10, r4, r1, r5\n\t"
        "UMAAL	r11, r4, r2, r5\n\t"
        "UMAAL	r12, r4, r3, r5\n\t"
        "MOV	r5, #0x0\n\t"
        "UMLAL	r10, r5, r0, r6\n\t"
        "UMAAL	r11, r5, r1, r6\n\t"
        "UMAAL	r12, r5, r2, r6\n\t"
        "UMAAL	r4, r5, r3, r6\n\t"
        "MOV	r6, #0x0\n\t"
        "UMLAL	r11, r6, r0, r7\n\t"
        "LDR	r0, [sp, #40]\n\t"
        "UMAAL	r12, r6, r1, r7\n\t"
        "ADD	r0, r0, #0x10\n\t"
        "UMAAL	r4, r6, r2, r7\n\t"
        "SUB	lr, lr, #0x10\n\t"
        "UMAAL	r5, r6, r3, r7\n\t"
        "LDM	r0, {r0, r1, r2, r3}\n\t"
        "STR	r6, [sp, #32]\n\t"
        "LDM	lr!, {r6}\n\t"
        "MOV	r7, #0x0\n\t"
        "UMLAL	r8, r7, r0, r6\n\t"
        "UMAAL	r9, r7, r1, r6\n\t"
        "STR	r8, [sp, #16]\n\t"
        "UMAAL	r10, r7, r2, r6\n\t"
        "UMAAL	r11, r7, r3, r6\n\t"
        "LDM	lr!, {r6}\n\t"
        "MOV	r8, #0x0\n\t"
        "UMLAL	r9, r8, r0, r6\n\t"
        "UMAAL	r10, r8, r1, r6\n\t"
        "STR	r9, [sp, #20]\n\t"
        "UMAAL	r11, r8, r2, r6\n\t"
        "UMAAL	r12, r8, r3, r6\n\t"
        "LDM	lr!, {r6}\n\t"
        "MOV	r9, #0x0\n\t"
        "UMLAL	r10, r9, r0, r6\n\t"
        "UMAAL	r11, r9, r1, r6\n\t"
        "STR	r10, [sp, #24]\n\t"
        "UMAAL	r12, r9, r2, r6\n\t"
        "UMAAL	r4, r9, r3, r6\n\t"
        "LDM	lr!, {r6}\n\t"
        "MOV	r10, #0x0\n\t"
        "UMLAL	r11, r10, r0, r6\n\t"
        "UMAAL	r12, r10, r1, r6\n\t"
        "STR	r11, [sp, #28]\n\t"
        "UMAAL	r4, r10, r2, r6\n\t"
        "UMAAL	r5, r10, r3, r6\n\t"
        "LDM	lr!, {r11}\n\t"
        "UMAAL	r12, r7, r0, r11\n\t"
        "UMAAL	r4, r7, r1, r11\n\t"
        "LDR	r6, [sp, #32]\n\t"
        "UMAAL	r5, r7, r2, r11\n\t"
        "UMAAL	r6, r7, r3, r11\n\t"
        "LDM	lr!, {r11}\n\t"
        "UMAAL	r4, r8, r0, r11\n\t"
        "UMAAL	r5, r8, r1, r11\n\t"
        "UMAAL	r6, r8, r2, r11\n\t"
        "UMAAL	r7, r8, r3, r11\n\t"
        "LDM	lr, {r11, lr}\n\t"
        "UMAAL	r5, r9, r0, r11\n\t"
        "UMAAL	r6, r10, r0, lr\n\t"
        "UMAAL	r6, r9, r1, r11\n\t"
        "UMAAL	r7, r10, r1, lr\n\t"
        "UMAAL	r7, r9, r2, r11\n\t"
        "UMAAL	r8, r10, r2, lr\n\t"
        "UMAAL	r8, r9, r3, r11\n\t"
        "UMAAL	r9, r10, r3, lr\n\t"
        "MOV	r3, r12\n\t"
        "LDR	lr, [sp, #36]\n\t"
        "ADD	lr, lr, #0x20\n\t"
        "STM	lr, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        "SUB	lr, lr, #0x20\n\t"
        "LDM	sp, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        "STM	lr, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        "ADD	sp, sp, #0x2c\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r3", "r4", "r5", "r6", "r10", "r11", "r12", "r7", "r8", "r9", "lr", "cc"
    );
}

#endif /* WOLFSSL_ARM_ARCH_7M */
#endif /* WOLFSSL_SP_SMALL */
#ifdef WOLFSSL_SP_SMALL
/* Square a and put result in r. (r = a * a)
 *
 * r  A single precision integer.
 * a  A single precision integer.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static void sp_256_sqr_sm2_8(sp_digit* r_p, const sp_digit* a_p)
#else
static void sp_256_sqr_sm2_8(sp_digit* r, const sp_digit* a)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "SUB	sp, sp, #0x40\n\t"
        "LDR	lr, [%[a]]\n\t"
        "UMULL	r8, r6, lr, lr\n\t"
        "STR	r8, [sp]\n\t"
        "MOV	r7, #0x0\n\t"
        "MOV	r8, #0x0\n\t"
        "MOV	r5, #0x4\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_sqr_sm2_8_outer:\n\t"
#else
    "L_sp_256_sqr_sm2_8_outer_%=:\n\t"
#endif
        "SUBS	r3, r5, #0x1c\n\t"
        "IT	cc\n\t"
        "MOVCC	r3, #0x0\n\t"
        "SUB	r4, r5, r3\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_sqr_sm2_8_inner:\n\t"
#else
    "L_sp_256_sqr_sm2_8_inner_%=:\n\t"
#endif
        "LDR	lr, [%[a], r3]\n\t"
        "LDR	r11, [%[a], r4]\n\t"
        "UMULL	r9, r10, lr, r11\n\t"
        "ADDS	r6, r6, r9\n\t"
        "ADCS	r7, r7, r10\n\t"
        "ADC	r8, r8, #0x0\n\t"
        "ADDS	r6, r6, r9\n\t"
        "ADCS	r7, r7, r10\n\t"
        "ADC	r8, r8, #0x0\n\t"
        "ADD	r3, r3, #0x4\n\t"
        "SUB	r4, r4, #0x4\n\t"
        "CMP	r3, r4\n\t"
#if defined(__GNUC__)
        "BGT	L_sp_256_sqr_sm2_8_inner_done_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BGT.N	L_sp_256_sqr_sm2_8_inner_done\n\t"
#else
        "BGT.N	L_sp_256_sqr_sm2_8_inner_done_%=\n\t"
#endif
#if defined(__GNUC__)
        "BLT	L_sp_256_sqr_sm2_8_inner_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BLT.N	L_sp_256_sqr_sm2_8_inner\n\t"
#else
        "BLT.N	L_sp_256_sqr_sm2_8_inner_%=\n\t"
#endif
        "LDR	lr, [%[a], r3]\n\t"
        "UMULL	r9, r10, lr, lr\n\t"
        "ADDS	r6, r6, r9\n\t"
        "ADCS	r7, r7, r10\n\t"
        "ADC	r8, r8, #0x0\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_sqr_sm2_8_inner_done:\n\t"
#else
    "L_sp_256_sqr_sm2_8_inner_done_%=:\n\t"
#endif
        "STR	r6, [sp, r5]\n\t"
        "MOV	r6, r7\n\t"
        "MOV	r7, r8\n\t"
        "MOV	r8, #0x0\n\t"
        "ADD	r5, r5, #0x4\n\t"
        "CMP	r5, #0x34\n\t"
#if defined(__GNUC__)
        "BLE	L_sp_256_sqr_sm2_8_outer_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BLE.N	L_sp_256_sqr_sm2_8_outer\n\t"
#else
        "BLE.N	L_sp_256_sqr_sm2_8_outer_%=\n\t"
#endif
        "LDR	lr, [%[a], #28]\n\t"
        "UMLAL	r6, r7, lr, lr\n\t"
        "STR	r6, [sp, r5]\n\t"
        "ADD	r5, r5, #0x4\n\t"
        "STR	r7, [sp, r5]\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_sqr_sm2_8_store:\n\t"
#else
    "L_sp_256_sqr_sm2_8_store_%=:\n\t"
#endif
        "LDM	sp!, {r3, r4, r6, r7, r8, r9, r10, r11}\n\t"
        "STM	%[r]!, {r3, r4, r6, r7, r8, r9, r10, r11}\n\t"
        "SUBS	r5, r5, #0x20\n\t"
#if defined(__GNUC__)
        "BGT	L_sp_256_sqr_sm2_8_store_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BGT.N	L_sp_256_sqr_sm2_8_store\n\t"
#else
        "BGT.N	L_sp_256_sqr_sm2_8_store_%=\n\t"
#endif
        : [r] "+r" (r), [a] "+r" (a)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "lr", "r11", "cc"
    );
}

#else
#ifdef WOLFSSL_ARM_ARCH_7M
/* Square a and put result in r. (r = a * a)
 *
 * r  A single precision integer.
 * a  A single precision integer.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static void sp_256_sqr_sm2_8(sp_digit* r_p, const sp_digit* a_p)
#else
SP_NOINLINE static void sp_256_sqr_sm2_8(sp_digit* r, const sp_digit* a)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "SUB	sp, sp, #0x44\n\t"
        "STR	%[r], [sp, #64]\n\t"
        "MOV	%[r], #0x0\n\t"
        "LDR	r12, [%[a]]\n\t"
        /* A[0] * A[1] */
        "LDR	lr, [%[a], #4]\n\t"
        "UMULL	r4, r5, r12, lr\n\t"
        /* A[0] * A[3] */
        "LDR	lr, [%[a], #12]\n\t"
        "UMULL	r6, r7, r12, lr\n\t"
        /* A[0] * A[5] */
        "LDR	lr, [%[a], #20]\n\t"
        "UMULL	r8, r9, r12, lr\n\t"
        /* A[0] * A[7] */
        "LDR	lr, [%[a], #28]\n\t"
        "UMULL	r10, r3, r12, lr\n\t"
        /* A[0] * A[2] */
        "LDR	lr, [%[a], #8]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[0] * A[4] */
        "LDR	lr, [%[a], #16]\n\t"
        "ADCS	r7, r7, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[0] * A[6] */
        "LDR	lr, [%[a], #24]\n\t"
        "ADCS	r9, r9, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        "ADCS	r3, r3, #0x0\n\t"
        "STR	r4, [sp, #4]\n\t"
        "STR	r5, [sp, #8]\n\t"
        /* A[1] * A[2] */
        "LDR	r12, [%[a], #4]\n\t"
        "LDR	lr, [%[a], #8]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "STR	r6, [sp, #12]\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[1] * A[3] */
        "LDR	lr, [%[a], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "STR	r7, [sp, #16]\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[1] * A[4] */
        "LDR	lr, [%[a], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[1] * A[5] */
        "LDR	lr, [%[a], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[1] * A[6] */
        "LDR	lr, [%[a], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[1] * A[7] */
        "LDR	lr, [%[a], #28]\n\t"
        "ADC	r4, %[r], #0x0\n\t"
        "UMLAL	r3, r4, r12, lr\n\t"
        /* A[2] * A[3] */
        "LDR	r12, [%[a], #8]\n\t"
        "LDR	lr, [%[a], #12]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "STR	r8, [sp, #20]\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[2] * A[4] */
        "LDR	lr, [%[a], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "STR	r9, [sp, #24]\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[2] * A[5] */
        "LDR	lr, [%[a], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[2] * A[6] */
        "LDR	lr, [%[a], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[2] * A[7] */
        "LDR	lr, [%[a], #28]\n\t"
        "ADC	r5, %[r], #0x0\n\t"
        "UMLAL	r4, r5, r12, lr\n\t"
        /* A[3] * A[4] */
        "LDR	r12, [%[a], #12]\n\t"
        "LDR	lr, [%[a], #16]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "STR	r10, [sp, #28]\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[3] * A[5] */
        "LDR	lr, [%[a], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[3] * A[6] */
        "LDR	lr, [%[a], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[3] * A[7] */
        "LDR	lr, [%[a], #28]\n\t"
        "ADC	r6, %[r], #0x0\n\t"
        "UMLAL	r5, r6, r12, lr\n\t"
        /* A[4] * A[5] */
        "LDR	r12, [%[a], #16]\n\t"
        "LDR	lr, [%[a], #20]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[4] * A[6] */
        "LDR	lr, [%[a], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[4] * A[7] */
        "LDR	lr, [%[a], #28]\n\t"
        "ADC	r7, %[r], #0x0\n\t"
        "UMLAL	r6, r7, r12, lr\n\t"
        /* A[5] * A[6] */
        "LDR	r12, [%[a], #20]\n\t"
        "LDR	lr, [%[a], #24]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[5] * A[7] */
        "LDR	lr, [%[a], #28]\n\t"
        "ADC	r8, %[r], #0x0\n\t"
        "UMLAL	r7, r8, r12, lr\n\t"
        /* A[6] * A[7] */
        "LDR	r12, [%[a], #24]\n\t"
        "LDR	lr, [%[a], #28]\n\t"
        "MOV	r9, #0x0\n\t"
        "UMLAL	r8, r9, r12, lr\n\t"
        "ADD	lr, sp, #0x20\n\t"
        "STM	lr, {r3, r4, r5, r6, r7, r8, r9}\n\t"
        "ADD	lr, sp, #0x4\n\t"
        "LDM	lr, {r4, r5, r6, r7, r8, r9, r10}\n\t"
        "ADDS	r4, r4, r4\n\t"
        "ADCS	r5, r5, r5\n\t"
        "ADCS	r6, r6, r6\n\t"
        "ADCS	r7, r7, r7\n\t"
        "ADCS	r8, r8, r8\n\t"
        "ADCS	r9, r9, r9\n\t"
        "ADCS	r10, r10, r10\n\t"
        "STM	lr!, {r4, r5, r6, r7, r8, r9, r10}\n\t"
        "LDM	lr, {r3, r4, r5, r6, r7, r8, r9}\n\t"
        "ADCS	r3, r3, r3\n\t"
        "ADCS	r4, r4, r4\n\t"
        "ADCS	r5, r5, r5\n\t"
        "ADCS	r6, r6, r6\n\t"
        "ADCS	r7, r7, r7\n\t"
        "ADCS	r8, r8, r8\n\t"
        "ADCS	r9, r9, r9\n\t"
        "ADC	r10, %[r], #0x0\n\t"
        "STM	lr, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        "ADD	lr, sp, #0x4\n\t"
        "LDM	lr, {r4, r5, r6, r7, r8, r9, r10}\n\t"
        "MOV	lr, sp\n\t"
        /* A[0] * A[0] */
        "LDR	r12, [%[a]]\n\t"
        "UMULL	r3, r11, r12, r12\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[1] * A[1] */
        "LDR	r12, [%[a], #4]\n\t"
        "ADCS	r5, r5, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, r12\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[2] * A[2] */
        "LDR	r12, [%[a], #8]\n\t"
        "ADCS	r7, r7, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, r12\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[3] * A[3] */
        "LDR	r12, [%[a], #12]\n\t"
        "ADCS	r9, r9, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, r12\n\t"
        "ADDS	r10, r10, r11\n\t"
        "STM	lr!, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        "LDM	lr, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        /* A[4] * A[4] */
        "LDR	r12, [%[a], #16]\n\t"
        "ADCS	r3, r3, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, r12\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[5] * A[5] */
        "LDR	r12, [%[a], #20]\n\t"
        "ADCS	r5, r5, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, r12\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[6] * A[6] */
        "LDR	r12, [%[a], #24]\n\t"
        "ADCS	r7, r7, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, r12\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[7] * A[7] */
        "LDR	r12, [%[a], #28]\n\t"
        "ADCS	r9, r9, #0x0\n\t"
        "ADC	r10, r10, #0x0\n\t"
        "UMLAL	r9, r10, r12, r12\n\t"
        "LDR	%[r], [sp, #64]\n\t"
        "ADD	%[r], %[r], #0x20\n\t"
        "STM	%[r], {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        "LDM	sp, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        "SUB	%[r], %[r], #0x20\n\t"
        "STM	%[r], {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        "ADD	sp, sp, #0x44\n\t"
        : [r] "+r" (r), [a] "+r" (a)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "lr", "cc"
    );
}

#else
/* Square a and put result in r. (r = a * a)
 *
 * r  A single precision integer.
 * a  A single precision integer.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static void sp_256_sqr_sm2_8(sp_digit* r_p, const sp_digit* a_p)
#else
SP_NOINLINE static void sp_256_sqr_sm2_8(sp_digit* r, const sp_digit* a)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "SUB	sp, sp, #0x20\n\t"
        "STR	%[r], [sp, #28]\n\t"
        "LDM	%[a], {r0, r1, r2, r3, r4, r5, r6, r7}\n\t"
        "UMULL	r9, r10, r0, r0\n\t"
        "UMULL	r11, r12, r0, r1\n\t"
        "ADDS	r11, r11, r11\n\t"
        "MOV	lr, #0x0\n\t"
        "UMAAL	r10, r11, lr, lr\n\t"
        "STM	sp, {r9, r10}\n\t"
        "MOV	r8, lr\n\t"
        "UMAAL	r8, r12, r0, r2\n\t"
        "ADCS	r8, r8, r8\n\t"
        "UMAAL	r8, r11, r1, r1\n\t"
        "UMULL	r9, r10, r0, r3\n\t"
        "UMAAL	r9, r12, r1, r2\n\t"
        "ADCS	r9, r9, r9\n\t"
        "UMAAL	r9, r11, lr, lr\n\t"
        "STRD	r8, r9, [sp, #8]\n\t"
        "MOV	r9, lr\n\t"
        "UMAAL	r9, r10, r0, r4\n\t"
        "UMAAL	r9, r12, r1, r3\n\t"
        "ADCS	r9, r9, r9\n\t"
        "UMAAL	r9, r11, r2, r2\n\t"
        "STR	r9, [sp, #16]\n\t"
        "UMULL	r9, r8, r0, r5\n\t"
        "UMAAL	r9, r12, r1, r4\n\t"
        "UMAAL	r9, r10, r2, r3\n\t"
        "ADCS	r9, r9, r9\n\t"
        "UMAAL	r9, r11, lr, lr\n\t"
        "STR	r9, [sp, #20]\n\t"
        "MOV	r9, lr\n\t"
        "UMAAL	r9, r8, r0, r6\n\t"
        "UMAAL	r9, r12, r1, r5\n\t"
        "UMAAL	r9, r10, r2, r4\n\t"
        "ADCS	r9, r9, r9\n\t"
        "UMAAL	r9, r11, r3, r3\n\t"
        "STR	r9, [sp, #24]\n\t"
        "UMULL	r0, r9, r0, r7\n\t"
        "UMAAL	r0, r8, r1, r6\n\t"
        "UMAAL	r0, r12, r2, r5\n\t"
        "UMAAL	r0, r10, r3, r4\n\t"
        "ADCS	r0, r0, r0\n\t"
        "UMAAL	r0, r11, lr, lr\n\t"
        /* R[7] = r0 */
        "UMAAL	r9, r8, r1, r7\n\t"
        "UMAAL	r9, r10, r2, r6\n\t"
        "UMAAL	r12, r9, r3, r5\n\t"
        "ADCS	r12, r12, r12\n\t"
        "UMAAL	r12, r11, r4, r4\n\t"
        /* R[8] = r12 */
        "UMAAL	r9, r8, r2, r7\n\t"
        "UMAAL	r10, r9, r3, r6\n\t"
        "MOV	r2, lr\n\t"
        "UMAAL	r10, r2, r4, r5\n\t"
        "ADCS	r10, r10, r10\n\t"
        "UMAAL	r11, r10, lr, lr\n\t"
        /* R[9] = r11 */
        "UMAAL	r2, r8, r3, r7\n\t"
        "UMAAL	r2, r9, r4, r6\n\t"
        "ADCS	r3, r2, r2\n\t"
        "UMAAL	r10, r3, r5, r5\n\t"
        /* R[10] = r10 */
        "MOV	r1, lr\n\t"
        "UMAAL	r1, r8, r4, r7\n\t"
        "UMAAL	r1, r9, r5, r6\n\t"
        "ADCS	r4, r1, r1\n\t"
        "UMAAL	r3, r4, lr, lr\n\t"
        /* R[11] = r3 */
        "UMAAL	r8, r9, r5, r7\n\t"
        "ADCS	r8, r8, r8\n\t"
        "UMAAL	r4, r8, r6, r6\n\t"
        /* R[12] = r4 */
        "MOV	r5, lr\n\t"
        "UMAAL	r5, r9, r6, r7\n\t"
        "ADCS	r5, r5, r5\n\t"
        "UMAAL	r8, r5, lr, lr\n\t"
        /* R[13] = r8 */
        "ADCS	r9, r9, r9\n\t"
        "UMAAL	r9, r5, r7, r7\n\t"
        "ADCS	r7, r5, lr\n\t"
        /* R[14] = r9 */
        /* R[15] = r7 */
        "LDR	lr, [sp, #28]\n\t"
        "ADD	lr, lr, #0x1c\n\t"
        "STM	lr!, {r0, r12}\n\t"
        "STM	lr!, {r11}\n\t"
        "STM	lr!, {r10}\n\t"
        "STM	lr!, {r3, r4, r8, r9}\n\t"
        "STM	lr!, {r7}\n\t"
        "SUB	lr, lr, #0x40\n\t"
        "LDM	sp, {r0, r1, r2, r3, r4, r5, r6}\n\t"
        "STM	lr, {r0, r1, r2, r3, r4, r5, r6}\n\t"
        "ADD	sp, sp, #0x20\n\t"
        : [r] "+r" (r), [a] "+r" (a)
        :
        : "memory", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "lr", "cc"
    );
}

#endif /* WOLFSSL_ARM_ARCH_7M */
#endif /* WOLFSSL_SP_SMALL */
#ifdef WOLFSSL_SP_SMALL
/* Add b to a into r. (r = a + b)
 *
 * r  A single precision integer.
 * a  A single precision integer.
 * b  A single precision integer.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static sp_digit sp_256_add_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p)
#else
static sp_digit sp_256_add_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "MOV	r3, #0x0\n\t"
        "ADD	r12, %[a], #0x20\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_add_sm2_8_word:\n\t"
#else
    "L_sp_256_add_sm2_8_word_%=:\n\t"
#endif
        "ADDS	r3, r3, #0xffffffff\n\t"
        "LDM	%[a]!, {r4, r5, r6, r7}\n\t"
        "LDM	%[b]!, {r8, r9, r10, r11}\n\t"
        "ADCS	r4, r4, r8\n\t"
        "ADCS	r5, r5, r9\n\t"
        "ADCS	r6, r6, r10\n\t"
        "ADCS	r7, r7, r11\n\t"
        "STM	%[r]!, {r4, r5, r6, r7}\n\t"
        "MOV	r4, #0x0\n\t"
        "ADC	r3, r4, #0x0\n\t"
        "CMP	%[a], r12\n\t"
#if defined(__GNUC__)
        "BNE	L_sp_256_add_sm2_8_word_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BNE.N	L_sp_256_add_sm2_8_word\n\t"
#else
        "BNE.N	L_sp_256_add_sm2_8_word_%=\n\t"
#endif
        "MOV	%[r], r3\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r3", "r12", "cc"
    );
    return (uint32_t)(size_t)r;
}

#else
/* Add b to a into r. (r = a + b)
 *
 * r  A single precision integer.
 * a  A single precision integer.
 * b  A single precision integer.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static sp_digit sp_256_add_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p)
#else
static sp_digit sp_256_add_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "LDM	%[a]!, {r3, r4, r5, r6}\n\t"
        "LDM	%[b]!, {r7, r8, r9, r10}\n\t"
        "ADDS	r3, r3, r7\n\t"
        "ADCS	r4, r4, r8\n\t"
        "ADCS	r5, r5, r9\n\t"
        "ADCS	r6, r6, r10\n\t"
        "STM	%[r]!, {r3, r4, r5, r6}\n\t"
        "LDM	%[a]!, {r3, r4, r5, r6}\n\t"
        "LDM	%[b]!, {r7, r8, r9, r10}\n\t"
        "ADCS	r3, r3, r7\n\t"
        "ADCS	r4, r4, r8\n\t"
        "ADCS	r5, r5, r9\n\t"
        "ADCS	r6, r6, r10\n\t"
        "STM	%[r]!, {r3, r4, r5, r6}\n\t"
        "MOV	%[r], #0x0\n\t"
        "ADC	%[r], %[r], #0x0\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "cc"
    );
    return (uint32_t)(size_t)r;
}

#endif /* WOLFSSL_SP_SMALL */
#ifdef WOLFSSL_SP_SMALL
/* Sub b from a into a. (a -= b)
 *
 * a  A single precision integer.
 * b  A single precision integer.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static sp_digit sp_256_sub_in_place_sm2_8(sp_digit* a_p, const sp_digit* b_p)
#else
static sp_digit sp_256_sub_in_place_sm2_8(sp_digit* a, const sp_digit* b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* a __asm__ ("r0") = (sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r1") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "MOV	r10, #0x0\n\t"
        "ADD	r11, %[a], #0x20\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_sub_in_pkace_sm2_8_word:\n\t"
#else
    "L_sp_256_sub_in_pkace_sm2_8_word_%=:\n\t"
#endif
        "RSBS	r10, r10, #0x0\n\t"
        "LDM	%[a], {r2, r3, r4, r5}\n\t"
        "LDM	%[b]!, {r6, r7, r8, r9}\n\t"
        "SBCS	r2, r2, r6\n\t"
        "SBCS	r3, r3, r7\n\t"
        "SBCS	r4, r4, r8\n\t"
        "SBCS	r5, r5, r9\n\t"
        "STM	%[a]!, {r2, r3, r4, r5}\n\t"
        "SBC	r10, r10, r10\n\t"
        "CMP	%[a], r11\n\t"
#if defined(__GNUC__)
        "BNE	L_sp_256_sub_in_pkace_sm2_8_word_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BNE.N	L_sp_256_sub_in_pkace_sm2_8_word\n\t"
#else
        "BNE.N	L_sp_256_sub_in_pkace_sm2_8_word_%=\n\t"
#endif
        "MOV	%[a], r10\n\t"
        : [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "cc"
    );
    return (uint32_t)(size_t)a;
}

#else
/* Sub b from a into a. (a -= b)
 *
 * a  A single precision integer and result.
 * b  A single precision integer.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static sp_digit sp_256_sub_in_place_sm2_8(sp_digit* a_p, const sp_digit* b_p)
#else
static sp_digit sp_256_sub_in_place_sm2_8(sp_digit* a, const sp_digit* b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* a __asm__ ("r0") = (sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r1") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "LDM	%[a], {r2, r3, r4, r5}\n\t"
        "LDM	%[b]!, {r6, r7, r8, r9}\n\t"
        "SUBS	r2, r2, r6\n\t"
        "SBCS	r3, r3, r7\n\t"
        "SBCS	r4, r4, r8\n\t"
        "SBCS	r5, r5, r9\n\t"
        "STM	%[a]!, {r2, r3, r4, r5}\n\t"
        "LDM	%[a], {r2, r3, r4, r5}\n\t"
        "LDM	%[b]!, {r6, r7, r8, r9}\n\t"
        "SBCS	r2, r2, r6\n\t"
        "SBCS	r3, r3, r7\n\t"
        "SBCS	r4, r4, r8\n\t"
        "SBCS	r5, r5, r9\n\t"
        "STM	%[a]!, {r2, r3, r4, r5}\n\t"
        "SBC	%[a], r9, r9\n\t"
        : [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "cc"
    );
    return (uint32_t)(size_t)a;
}

#endif /* WOLFSSL_SP_SMALL */
#ifdef WOLFSSL_SP_SMALL
/* Conditionally subtract b from a using the mask m.
 * m is -1 to subtract and 0 when not copying.
 *
 * r  A single precision number representing condition subtract result.
 * a  A single precision number to subtract from.
 * b  A single precision number to subtract.
 * m  Mask value to apply.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static sp_digit sp_256_cond_sub_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p, sp_digit m_p)
#else
static sp_digit sp_256_cond_sub_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b, sp_digit m)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
    register sp_digit m __asm__ ("r3") = (sp_digit)m_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "MOV	r8, #0x0\n\t"
        "MOV	r4, #0x0\n\t"
        "MOV	r5, #0x0\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_cond_sub_sm2_8_words:\n\t"
#else
    "L_sp_256_cond_sub_sm2_8_words_%=:\n\t"
#endif
        "SUBS	r4, r8, r4\n\t"
        "LDR	r6, [%[a], r5]\n\t"
        "LDR	r7, [%[b], r5]\n\t"
        "AND	r7, r7, %[m]\n\t"
        "SBCS	r6, r6, r7\n\t"
        "SBC	r4, r8, r8\n\t"
        "STR	r6, [%[r], r5]\n\t"
        "ADD	r5, r5, #0x4\n\t"
        "CMP	r5, #0x20\n\t"
#if defined(__GNUC__)
        "BLT	L_sp_256_cond_sub_sm2_8_words_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BLT.N	L_sp_256_cond_sub_sm2_8_words\n\t"
#else
        "BLT.N	L_sp_256_cond_sub_sm2_8_words_%=\n\t"
#endif
        "MOV	%[r], r4\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b), [m] "+r" (m)
        :
        : "memory", "r4", "r5", "r6", "r7", "r8", "cc"
    );
    return (uint32_t)(size_t)r;
}

#else
/* Conditionally subtract b from a using the mask m.
 * m is -1 to subtract and 0 when not copying.
 *
 * r  A single precision number representing condition subtract result.
 * a  A single precision number to subtract from.
 * b  A single precision number to subtract.
 * m  Mask value to apply.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static sp_digit sp_256_cond_sub_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p, sp_digit m_p)
#else
static sp_digit sp_256_cond_sub_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b, sp_digit m)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
    register sp_digit m __asm__ ("r3") = (sp_digit)m_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "MOV	r5, #0x0\n\t"
        "LDM	%[a]!, {r6, r7}\n\t"
        "LDM	%[b]!, {r8, r9}\n\t"
        "AND	r8, r8, %[m]\n\t"
        "AND	r9, r9, %[m]\n\t"
        "SUBS	r6, r6, r8\n\t"
        "SBCS	r7, r7, r9\n\t"
        "STM	%[r]!, {r6, r7}\n\t"
        "LDM	%[a]!, {r6, r7}\n\t"
        "LDM	%[b]!, {r8, r9}\n\t"
        "AND	r8, r8, %[m]\n\t"
        "AND	r9, r9, %[m]\n\t"
        "SBCS	r6, r6, r8\n\t"
        "SBCS	r7, r7, r9\n\t"
        "STM	%[r]!, {r6, r7}\n\t"
        "LDM	%[a]!, {r6, r7}\n\t"
        "LDM	%[b]!, {r8, r9}\n\t"
        "AND	r8, r8, %[m]\n\t"
        "AND	r9, r9, %[m]\n\t"
        "SBCS	r6, r6, r8\n\t"
        "SBCS	r7, r7, r9\n\t"
        "STM	%[r]!, {r6, r7}\n\t"
        "LDM	%[a]!, {r6, r7}\n\t"
        "LDM	%[b]!, {r8, r9}\n\t"
        "AND	r8, r8, %[m]\n\t"
        "AND	r9, r9, %[m]\n\t"
        "SBCS	r6, r6, r8\n\t"
        "SBCS	r7, r7, r9\n\t"
        "STM	%[r]!, {r6, r7}\n\t"
        "SBC	%[r], r5, r5\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b), [m] "+r" (m)
        :
        : "memory", "r4", "r5", "r6", "r7", "r8", "r9", "cc"
    );
    return (uint32_t)(size_t)r;
}

#endif /* WOLFSSL_SP_SMALL */
#ifdef WOLFSSL_SP_SMALL
/* Mul a by digit b into r. (r = a * b)
 *
 * r  A single precision integer.
 * a  A single precision integer.
 * b  A single precision digit.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static void sp_256_mul_d_sm2_8(sp_digit* r_p, const sp_digit* a_p, sp_digit b_p)
#else
static void sp_256_mul_d_sm2_8(sp_digit* r, const sp_digit* a, sp_digit b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register sp_digit b __asm__ ("r2") = (sp_digit)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        /* A[0] * B */
        "LDR	r8, [%[a]]\n\t"
        "UMULL	r5, r3, %[b], r8\n\t"
        "MOV	r4, #0x0\n\t"
        "STR	r5, [%[r]]\n\t"
        "MOV	r5, #0x0\n\t"
        "MOV	r9, #0x4\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_mul_d_sm2_8_word:\n\t"
#else
    "L_sp_256_mul_d_sm2_8_word_%=:\n\t"
#endif
        /* A[i] * B */
        "LDR	r8, [%[a], r9]\n\t"
        "UMULL	r6, r7, %[b], r8\n\t"
        "ADDS	r3, r3, r6\n\t"
        "ADCS	r4, r4, r7\n\t"
        "ADC	r5, r5, #0x0\n\t"
        "STR	r3, [%[r], r9]\n\t"
        "MOV	r3, r4\n\t"
        "MOV	r4, r5\n\t"
        "MOV	r5, #0x0\n\t"
        "ADD	r9, r9, #0x4\n\t"
        "CMP	r9, #0x20\n\t"
#if defined(__GNUC__)
        "BLT	L_sp_256_mul_d_sm2_8_word_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BLT.N	L_sp_256_mul_d_sm2_8_word\n\t"
#else
        "BLT.N	L_sp_256_mul_d_sm2_8_word_%=\n\t"
#endif
        "STR	r3, [%[r], #32]\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "cc"
    );
}

#else
/* Mul a by digit b into r. (r = a * b)
 *
 * r  A single precision integer.
 * a  A single precision integer.
 * b  A single precision digit.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static void sp_256_mul_d_sm2_8(sp_digit* r_p, const sp_digit* a_p, sp_digit b_p)
#else
static void sp_256_mul_d_sm2_8(sp_digit* r, const sp_digit* a, sp_digit b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register sp_digit b __asm__ ("r2") = (sp_digit)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        /* A[0] * B */
        "LDM	%[a]!, {r8}\n\t"
        "UMULL	r3, r4, %[b], r8\n\t"
        "STM	%[r]!, {r3}\n\t"
        "MOV	r5, #0x0\n\t"
        /* A[1] * B */
        "LDM	%[a]!, {r8}\n\t"
        "UMLAL	r4, r5, %[b], r8\n\t"
        "STM	%[r]!, {r4}\n\t"
        "MOV	r3, #0x0\n\t"
        /* A[2] * B */
        "LDM	%[a]!, {r8}\n\t"
        "UMLAL	r5, r3, %[b], r8\n\t"
        "STM	%[r]!, {r5}\n\t"
        "MOV	r4, #0x0\n\t"
        /* A[3] * B */
        "LDM	%[a]!, {r8}\n\t"
        "UMLAL	r3, r4, %[b], r8\n\t"
        "STM	%[r]!, {r3}\n\t"
        "MOV	r5, #0x0\n\t"
        /* A[4] * B */
        "LDM	%[a]!, {r8}\n\t"
        "UMLAL	r4, r5, %[b], r8\n\t"
        "STM	%[r]!, {r4}\n\t"
        "MOV	r3, #0x0\n\t"
        /* A[5] * B */
        "LDM	%[a]!, {r8}\n\t"
        "UMLAL	r5, r3, %[b], r8\n\t"
        "STM	%[r]!, {r5}\n\t"
        "MOV	r4, #0x0\n\t"
        /* A[6] * B */
        "LDM	%[a]!, {r8}\n\t"
        "UMLAL	r3, r4, %[b], r8\n\t"
        "STM	%[r]!, {r3}\n\t"
        "MOV	r5, #0x0\n\t"
        /* A[7] * B */
        "LDM	%[a]!, {r8}\n\t"
        "UMLAL	r4, r5, %[b], r8\n\t"
        "STM	%[r]!, {r4}\n\t"
        "STR	r5, [%[r]]\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "cc"
    );
}

#endif /* WOLFSSL_SP_SMALL */
#ifdef WOLFSSL_SP_USE_UDIV
/* Divide the double width number (d1|d0) by the divisor. (d1|d0 / div)
 *
 * d1   The high order half of the number to divide.
 * d0   The low order half of the number to divide.
 * div  The divisor.
 * returns the result of the division.
 *
 * Note that this is an approximate div. It may give an answer 1 larger.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static sp_digit div_256_word_8(sp_digit d1_p, sp_digit d0_p, sp_digit div_p)
#else
SP_NOINLINE static sp_digit div_256_word_8(sp_digit d1, sp_digit d0, sp_digit div)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit d1 __asm__ ("r0") = (sp_digit)d1_p;
    register sp_digit d0 __asm__ ("r1") = (sp_digit)d0_p;
    register sp_digit div __asm__ ("r2") = (sp_digit)div_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "LSR	r8, %[div], #16\n\t"
        "ADD	r5, r8, #0x1\n\t"
        "UDIV	r6, %[d1], r5\n\t"
        "LSL	r7, %[div], #16\n\t"
        "LSL	r6, r6, #16\n\t"
        "UMULL	r3, r4, %[div], r6\n\t"
        "SUBS	%[d0], %[d0], r3\n\t"
        "SBC	%[d1], %[d1], r4\n\t"
        "SUBS	r3, %[d1], r5\n\t"
        "SBC	r9, r9, r9\n\t"
        "ADD	r9, r9, #0x1\n\t"
        "RSB	r10, r9, #0x0\n\t"
        "LSL	r9, r9, #16\n\t"
        "AND	r7, r7, r10\n\t"
        "AND	r8, r8, r10\n\t"
        "SUBS	%[d0], %[d0], r7\n\t"
        "ADD	r6, r6, r9\n\t"
        "SBC	%[d1], %[d1], r8\n\t"
        "LSL	r4, %[d1], #16\n\t"
        "LSR	r3, %[d0], #16\n\t"
        "ORR	r3, r3, r4\n\t"
        "UDIV	r3, r3, r5\n\t"
        "ADD	r6, r6, r3\n\t"
        "UMULL	r3, r4, %[div], r3\n\t"
        "SUBS	%[d0], %[d0], r3\n\t"
        "SBC	%[d1], %[d1], r4\n\t"
        "LSL	r4, %[d1], #16\n\t"
        "LSR	r3, %[d0], #16\n\t"
        "ORR	r3, r3, r4\n\t"
        "UDIV	r3, r3, r5\n\t"
        "ADD	r6, r6, r3\n\t"
        "MUL	r3, %[div], r3\n\t"
        "SUB	%[d0], %[d0], r3\n\t"
        "UDIV	r3, %[d0], %[div]\n\t"
        "ADD	%[d1], r6, r3\n\t"
        : [d1] "+r" (d1), [d0] "+r" (d0), [div] "+r" (div)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "cc"
    );
    return (uint32_t)(size_t)d1;
}

#else
/* Divide the double width number (d1|d0) by the divisor. (d1|d0 / div)
 *
 * d1   The high order half of the number to divide.
 * d0   The low order half of the number to divide.
 * div  The divisor.
 * returns the result of the division.
 *
 * Note that this is an approximate div. It may give an answer 1 larger.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static sp_digit div_256_word_8(sp_digit d1_p, sp_digit d0_p, sp_digit div_p)
#else
SP_NOINLINE static sp_digit div_256_word_8(sp_digit d1, sp_digit d0, sp_digit div)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit d1 __asm__ ("r0") = (sp_digit)d1_p;
    register sp_digit d0 __asm__ ("r1") = (sp_digit)d0_p;
    register sp_digit div __asm__ ("r2") = (sp_digit)div_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "LSR	r5, %[div], #1\n\t"
        "ADD	r5, r5, #0x1\n\t"
        "MOV	r6, %[d0]\n\t"
        "MOV	r7, %[d1]\n\t"
        /* Do top 32 */
        "SUBS	r8, r5, r7\n\t"
        "SBC	r8, r8, r8\n\t"
        "MOV	r3, #0x0\n\t"
        "SUB	r3, r3, r8\n\t"
        "AND	r8, r8, r5\n\t"
        "SUBS	r7, r7, r8\n\t"
        /* Next 30 bits */
        "MOV	r4, #0x1d\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_div_256_word_8_bit:\n\t"
#else
    "L_div_256_word_8_bit_%=:\n\t"
#endif
        "LSLS	r6, r6, #1\n\t"
        "ADC	r7, r7, r7\n\t"
        "SUBS	r8, r5, r7\n\t"
        "SBC	r8, r8, r8\n\t"
        "ADD	r3, r3, r3\n\t"
        "SUB	r3, r3, r8\n\t"
        "AND	r8, r8, r5\n\t"
        "SUBS	r7, r7, r8\n\t"
        "SUBS	r4, r4, #0x1\n\t"
#if defined(__GNUC__)
        "BPL	L_div_256_word_8_bit_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BPL.N	L_div_256_word_8_bit\n\t"
#else
        "BPL.N	L_div_256_word_8_bit_%=\n\t"
#endif
        "ADD	r3, r3, r3\n\t"
        "ADD	r3, r3, #0x1\n\t"
        "UMULL	r6, r7, r3, %[div]\n\t"
        "SUBS	r9, %[d0], r6\n\t"
        "SBC	r10, %[d1], r7\n\t"
        "ADD	r3, r3, r10\n\t"
        "UMULL	r6, r7, r3, %[div]\n\t"
        "SUBS	r9, %[d0], r6\n\t"
        "SBC	r10, %[d1], r7\n\t"
        "ADD	r3, r3, r10\n\t"
        "UMULL	r6, r7, r3, %[div]\n\t"
        "SUBS	r9, %[d0], r6\n\t"
        "SBC	r10, %[d1], r7\n\t"
        "ADD	r3, r3, r10\n\t"
        "SUBS	r8, %[div], r9\n\t"
        "SBC	r8, r8, r8\n\t"
        "SUB	%[d1], r3, r8\n\t"
        : [d1] "+r" (d1), [d0] "+r" (d0), [div] "+r" (div)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "cc"
    );
    return (uint32_t)(size_t)d1;
}

#endif
/* AND m into each word of a and store in r.
 *
 * r  A single precision integer.
 * a  A single precision integer.
 * m  Mask to AND against each digit.
 */
static void sp_256_mask_8(sp_digit* r, const sp_digit* a, sp_digit m)
{
#ifdef WOLFSSL_SP_SMALL
    int i;

    for (i=0; i<8; i++) {
        r[i] = a[i] & m;
    }
#else
    r[0] = a[0] & m;
    r[1] = a[1] & m;
    r[2] = a[2] & m;
    r[3] = a[3] & m;
    r[4] = a[4] & m;
    r[5] = a[5] & m;
    r[6] = a[6] & m;
    r[7] = a[7] & m;
#endif
}

/* Compare a with b in constant time.
 *
 * a  A single precision integer.
 * b  A single precision integer.
 * return -ve, 0 or +ve if a is less than, equal to or greater than b
 * respectively.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static sp_int32 sp_256_cmp_sm2_8(const sp_digit* a_p, const sp_digit* b_p)
#else
static sp_int32 sp_256_cmp_sm2_8(const sp_digit* a, const sp_digit* b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register const sp_digit* a __asm__ ("r0") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r1") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "MOV	r2, #0xffffffff\n\t"
        "MOV	r8, #0x1\n\t"
        "MOV	r7, #0x0\n\t"
        "MOV	r3, #0xffffffff\n\t"
#ifdef WOLFSSL_SP_SMALL
        "MOV	r6, #0x1c\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_cmp_sm2_8_words:\n\t"
#else
    "L_sp_256_cmp_sm2_8_words_%=:\n\t"
#endif
        "LDR	r4, [%[a], r6]\n\t"
        "LDR	r5, [%[b], r6]\n\t"
        "AND	r4, r4, r3\n\t"
        "AND	r5, r5, r3\n\t"
        "SUBS	r4, r4, r5\n\t"
        "IT	hi\n\t"
        "movhi	r2, r8\n\t"
        "IT	lo\n\t"
        "movlo	r2, r3\n\t"
        "IT	ne\n\t"
        "movne	r3, r7\n\t"
        "SUBS	r6, r6, #0x4\n\t"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "bcs	L_sp_256_cmp_sm2_8_words\n\t"
#else
        "bcs	L_sp_256_cmp_sm2_8_words_%=\n\t"
#endif
        "EOR	r2, r2, r3\n\t"
#else
        "LDR	r4, [%[a], #28]\n\t"
        "LDR	r5, [%[b], #28]\n\t"
        "AND	r4, r4, r3\n\t"
        "AND	r5, r5, r3\n\t"
        "SUBS	r4, r4, r5\n\t"
        "IT	hi\n\t"
        "movhi	r2, r8\n\t"
        "IT	lo\n\t"
        "movlo	r2, r3\n\t"
        "IT	ne\n\t"
        "movne	r3, r7\n\t"
        "LDR	r4, [%[a], #24]\n\t"
        "LDR	r5, [%[b], #24]\n\t"
        "AND	r4, r4, r3\n\t"
        "AND	r5, r5, r3\n\t"
        "SUBS	r4, r4, r5\n\t"
        "IT	hi\n\t"
        "movhi	r2, r8\n\t"
        "IT	lo\n\t"
        "movlo	r2, r3\n\t"
        "IT	ne\n\t"
        "movne	r3, r7\n\t"
        "LDR	r4, [%[a], #20]\n\t"
        "LDR	r5, [%[b], #20]\n\t"
        "AND	r4, r4, r3\n\t"
        "AND	r5, r5, r3\n\t"
        "SUBS	r4, r4, r5\n\t"
        "IT	hi\n\t"
        "movhi	r2, r8\n\t"
        "IT	lo\n\t"
        "movlo	r2, r3\n\t"
        "IT	ne\n\t"
        "movne	r3, r7\n\t"
        "LDR	r4, [%[a], #16]\n\t"
        "LDR	r5, [%[b], #16]\n\t"
        "AND	r4, r4, r3\n\t"
        "AND	r5, r5, r3\n\t"
        "SUBS	r4, r4, r5\n\t"
        "IT	hi\n\t"
        "movhi	r2, r8\n\t"
        "IT	lo\n\t"
        "movlo	r2, r3\n\t"
        "IT	ne\n\t"
        "movne	r3, r7\n\t"
        "LDR	r4, [%[a], #12]\n\t"
        "LDR	r5, [%[b], #12]\n\t"
        "AND	r4, r4, r3\n\t"
        "AND	r5, r5, r3\n\t"
        "SUBS	r4, r4, r5\n\t"
        "IT	hi\n\t"
        "movhi	r2, r8\n\t"
        "IT	lo\n\t"
        "movlo	r2, r3\n\t"
        "IT	ne\n\t"
        "movne	r3, r7\n\t"
        "LDR	r4, [%[a], #8]\n\t"
        "LDR	r5, [%[b], #8]\n\t"
        "AND	r4, r4, r3\n\t"
        "AND	r5, r5, r3\n\t"
        "SUBS	r4, r4, r5\n\t"
        "IT	hi\n\t"
        "movhi	r2, r8\n\t"
        "IT	lo\n\t"
        "movlo	r2, r3\n\t"
        "IT	ne\n\t"
        "movne	r3, r7\n\t"
        "LDR	r4, [%[a], #4]\n\t"
        "LDR	r5, [%[b], #4]\n\t"
        "AND	r4, r4, r3\n\t"
        "AND	r5, r5, r3\n\t"
        "SUBS	r4, r4, r5\n\t"
        "IT	hi\n\t"
        "movhi	r2, r8\n\t"
        "IT	lo\n\t"
        "movlo	r2, r3\n\t"
        "IT	ne\n\t"
        "movne	r3, r7\n\t"
        "LDR	r4, [%[a]]\n\t"
        "LDR	r5, [%[b]]\n\t"
        "AND	r4, r4, r3\n\t"
        "AND	r5, r5, r3\n\t"
        "SUBS	r4, r4, r5\n\t"
        "IT	hi\n\t"
        "movhi	r2, r8\n\t"
        "IT	lo\n\t"
        "movlo	r2, r3\n\t"
        "IT	ne\n\t"
        "movne	r3, r7\n\t"
        "EOR	r2, r2, r3\n\t"
#endif /*WOLFSSL_SP_SMALL */
        "MOV	%[a], r2\n\t"
        : [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "cc"
    );
    return (uint32_t)(size_t)a;
}

/* Divide d in a and put remainder into r (m*d + r = a)
 * m is not calculated as it is not needed at this time.
 *
 * a  Number to be divided.
 * d  Number to divide with.
 * m  Multiplier result.
 * r  Remainder from the division.
 * returns MP_OKAY indicating success.
 */
static WC_INLINE int sp_256_div_sm2_8(const sp_digit* a, const sp_digit* d,
        sp_digit* m, sp_digit* r)
{
    sp_digit t1[16], t2[9];
    sp_digit div, r1;
    int i;

    (void)m;

    div = d[7];
    XMEMCPY(t1, a, sizeof(*t1) * 2 * 8);
    r1 = sp_256_cmp_sm2_8(&t1[8], d) >= 0;
    sp_256_cond_sub_sm2_8(&t1[8], &t1[8], d, (sp_digit)0 - r1);
    for (i = 7; i >= 0; i--) {
        volatile sp_digit mask = (sp_digit)0 - (t1[8 + i] == div);
        sp_digit hi = t1[8 + i] + mask;
        r1 = div_256_word_8(hi, t1[8 + i - 1], div);
        r1 |= mask;

        sp_256_mul_d_sm2_8(t2, d, r1);
        t1[8 + i] += sp_256_sub_in_place_sm2_8(&t1[i], t2);
        t1[8 + i] -= t2[8];
        sp_256_mask_8(t2, d, t1[8 + i]);
        t1[8 + i] += sp_256_add_sm2_8(&t1[i], &t1[i], t2);
        sp_256_mask_8(t2, d, t1[8 + i]);
        t1[8 + i] += sp_256_add_sm2_8(&t1[i], &t1[i], t2);
    }

    r1 = sp_256_cmp_sm2_8(t1, d) >= 0;
    sp_256_cond_sub_sm2_8(r, t1, d, (sp_digit)0 - r1);

    return MP_OKAY;
}

/* Reduce a modulo m into r. (r = a mod m)
 *
 * r  A single precision number that is the reduced result.
 * a  A single precision number that is to be reduced.
 * m  A single precision number that is the modulus to reduce with.
 * returns MP_OKAY indicating success.
 */
static WC_INLINE int sp_256_mod_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* m)
{
    return sp_256_div_sm2_8(a, m, NULL, r);
}

/* Multiply a number by Montgomery normalizer mod modulus (prime).
 *
 * r  The resulting Montgomery form number.
 * a  The number to convert.
 * m  The modulus (prime).
 * returns MEMORY_E when memory allocation fails and MP_OKAY otherwise.
 */
static int sp_256_mod_mul_norm_sm2_8(sp_digit* r, const sp_digit* a,
        const sp_digit* m)
{
    sp_256_mul_sm2_8(r, a, p256_sm2_norm_mod);
    return sp_256_mod_sm2_8(r, r, m);
}

/* Convert an mp_int to an array of sp_digit.
 *
 * r  A single precision integer.
 * size  Maximum number of bytes to convert
 * a  A multi-precision integer.
 */
static void sp_256_from_mp(sp_digit* r, int size, const mp_int* a)
{
#if DIGIT_BIT == 32
    int i;
    sp_digit j = (sp_digit)0 - (sp_digit)a->used;
    int o = 0;

    for (i = 0; i < size; i++) {
        sp_digit mask = (sp_digit)0 - (j >> 31);
        r[i] = a->dp[o] & mask;
        j++;
        o += (int)(j >> 31);
    }
#elif DIGIT_BIT > 32
    unsigned int i;
    int j = 0;
    word32 s = 0;

    r[0] = 0;
    for (i = 0; i < (unsigned int)a->used && j < size; i++) {
        r[j] |= ((sp_digit)a->dp[i] << s);
        r[j] &= 0xffffffff;
        s = 32U - s;
        if (j + 1 >= size) {
            break;
        }
        /* lint allow cast of mismatch word32 and mp_digit */
        r[++j] = (sp_digit)(a->dp[i] >> s); /*lint !e9033*/
        while ((s + 32U) <= (word32)DIGIT_BIT) {
            s += 32U;
            r[j] &= 0xffffffff;
            if (j + 1 >= size) {
                break;
            }
            if (s < (word32)DIGIT_BIT) {
                /* lint allow cast of mismatch word32 and mp_digit */
                r[++j] = (sp_digit)(a->dp[i] >> s); /*lint !e9033*/
            }
            else {
                r[++j] = (sp_digit)0;
            }
        }
        s = (word32)DIGIT_BIT - s;
    }

    for (j++; j < size; j++) {
        r[j] = 0;
    }
#else
    unsigned int i;
    int j = 0;
    int s = 0;

    r[0] = 0;
    for (i = 0; i < (unsigned int)a->used && j < size; i++) {
        r[j] |= ((sp_digit)a->dp[i]) << s;
        if (s + DIGIT_BIT >= 32) {
            r[j] &= 0xffffffff;
            if (j + 1 >= size) {
                break;
            }
            s = 32 - s;
            if (s == DIGIT_BIT) {
                r[++j] = 0;
                s = 0;
            }
            else {
                r[++j] = a->dp[i] >> s;
                s = DIGIT_BIT - s;
            }
        }
        else {
            s += DIGIT_BIT;
        }
    }

    for (j++; j < size; j++) {
        r[j] = 0;
    }
#endif
}

/* Convert a point of type ecc_point to type sp_point_256.
 *
 * p   Point of type sp_point_256 (result).
 * pm  Point of type ecc_point.
 */
static void sp_256_point_from_ecc_point_8(sp_point_256* p,
        const ecc_point* pm)
{
    XMEMSET(p->x, 0, sizeof(p->x));
    XMEMSET(p->y, 0, sizeof(p->y));
    XMEMSET(p->z, 0, sizeof(p->z));
    sp_256_from_mp(p->x, 8, pm->x);
    sp_256_from_mp(p->y, 8, pm->y);
    sp_256_from_mp(p->z, 8, pm->z);
    p->infinity = 0;
}

/* Convert an array of sp_digit to an mp_int.
 *
 * a  A single precision integer.
 * r  A multi-precision integer.
 */
static int sp_256_to_mp(const sp_digit* a, mp_int* r)
{
    int err;

    err = mp_grow(r, (256 + DIGIT_BIT - 1) / DIGIT_BIT);
    if (err == MP_OKAY) { /*lint !e774 case where err is always MP_OKAY*/
#if DIGIT_BIT == 32
        XMEMCPY(r->dp, a, sizeof(sp_digit) * 8);
        r->used = 8;
        mp_clamp(r);
#elif DIGIT_BIT < 32
        int i;
        int j = 0;
        int s = 0;

        r->dp[0] = 0;
        for (i = 0; i < 8; i++) {
            r->dp[j] |= (mp_digit)(a[i] << s);
            r->dp[j] &= ((sp_digit)1 << DIGIT_BIT) - 1;
            s = DIGIT_BIT - s;
            r->dp[++j] = (mp_digit)(a[i] >> s);
            while (s + DIGIT_BIT <= 32) {
                s += DIGIT_BIT;
                r->dp[j++] &= ((sp_digit)1 << DIGIT_BIT) - 1;
                if (s == SP_WORD_SIZE) {
                    r->dp[j] = 0;
                }
                else {
                    r->dp[j] = (mp_digit)(a[i] >> s);
                }
            }
            s = 32 - s;
        }
        r->used = (256 + DIGIT_BIT - 1) / DIGIT_BIT;
        mp_clamp(r);
#else
        int i;
        int j = 0;
        int s = 0;

        r->dp[0] = 0;
        for (i = 0; i < 8; i++) {
            r->dp[j] |= ((mp_digit)a[i]) << s;
            if (s + 32 >= DIGIT_BIT) {
    #if DIGIT_BIT != 32 && DIGIT_BIT != 64
                r->dp[j] &= ((sp_digit)1 << DIGIT_BIT) - 1;
    #endif
                s = DIGIT_BIT - s;
                r->dp[++j] = a[i] >> s;
                s = 32 - s;
            }
            else {
                s += 32;
            }
        }
        r->used = (256 + DIGIT_BIT - 1) / DIGIT_BIT;
        mp_clamp(r);
#endif
    }

    return err;
}

/* Convert a point of type sp_point_256 to type ecc_point.
 *
 * p   Point of type sp_point_256.
 * pm  Point of type ecc_point (result).
 * returns MEMORY_E when allocation of memory in ecc_point fails otherwise
 * MP_OKAY.
 */
static int sp_256_point_to_ecc_point_8(const sp_point_256* p, ecc_point* pm)
{
    int err;

    err = sp_256_to_mp(p->x, pm->x);
    if (err == MP_OKAY) {
        err = sp_256_to_mp(p->y, pm->y);
    }
    if (err == MP_OKAY) {
        err = sp_256_to_mp(p->z, pm->z);
    }

    return err;
}

#ifdef WOLFSSL_SP_NO_UMAAL
/* Multiply two Montgomery form numbers mod the modulus (prime).
 * (r = a * b mod m)
 *
 * r   Result of multiplication.
 * a   First number to multiply in Montgomery form.
 * b   Second number to multiply in Montgomery form.
 * m   Modulus (prime).
 * mp  Montgomery multiplier.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static void sp_256_mont_mul_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p, const sp_digit* m_p, sp_digit mp_p)
#else
static void sp_256_mont_mul_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b, const sp_digit* m, sp_digit mp)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "SUB	sp, sp, #0x44\n\t"
        "STR	%[r], [sp, #64]\n\t"
        "MOV	%[r], #0x0\n\t"
        "LDR	r12, [%[a]]\n\t"
        /* A[0] * B[0] */
        "LDR	lr, [%[b]]\n\t"
        "UMULL	r3, r4, r12, lr\n\t"
        /* A[0] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "UMULL	r5, r6, r12, lr\n\t"
        /* A[0] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "UMULL	r7, r8, r12, lr\n\t"
        /* A[0] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "UMULL	r9, r10, r12, lr\n\t"
        "STR	r3, [sp]\n\t"
        /* A[0] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "MOV	r11, %[r]\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[0] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADCS	r6, r6, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[0] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADCS	r8, r8, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[0] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADCS	r10, r10, #0x0\n\t"
        "ADC	r3, %[r], #0x0\n\t"
        "UMLAL	r10, r3, r12, lr\n\t"
        /* A[1] * B[0] */
        "LDR	r12, [%[a], #4]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "STR	r4, [sp, #4]\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[1] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[1] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[1] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[1] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[1] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[1] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[1] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r4, %[r], #0x0\n\t"
        "UMLAL	r3, r4, r12, lr\n\t"
        /* A[2] * B[0] */
        "LDR	r12, [%[a], #8]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "STR	r5, [sp, #8]\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[2] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[2] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[2] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[2] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[2] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[2] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[2] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r5, %[r], #0x0\n\t"
        "UMLAL	r4, r5, r12, lr\n\t"
        /* A[3] * B[0] */
        "LDR	r12, [%[a], #12]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "STR	r6, [sp, #12]\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[3] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[3] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[3] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[3] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[3] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[3] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[3] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r6, %[r], #0x0\n\t"
        "UMLAL	r5, r6, r12, lr\n\t"
        /* A[4] * B[0] */
        "LDR	r12, [%[a], #16]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "STR	r7, [sp, #16]\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[4] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[4] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[4] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[4] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[4] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[4] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[4] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r7, %[r], #0x0\n\t"
        "UMLAL	r6, r7, r12, lr\n\t"
        /* A[5] * B[0] */
        "LDR	r12, [%[a], #20]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "STR	r8, [sp, #20]\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[5] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[5] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[5] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[5] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[5] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[5] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[5] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r8, %[r], #0x0\n\t"
        "UMLAL	r7, r8, r12, lr\n\t"
        /* A[6] * B[0] */
        "LDR	r12, [%[a], #24]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "STR	r9, [sp, #24]\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[6] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[6] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[6] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[6] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[6] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[6] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[6] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r9, %[r], #0x0\n\t"
        "UMLAL	r8, r9, r12, lr\n\t"
        /* A[7] * B[0] */
        "LDR	r12, [%[a], #28]\n\t"
        "LDR	lr, [%[b]]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "STR	r10, [sp, #28]\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[7] * B[1] */
        "LDR	lr, [%[b], #4]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[7] * B[2] */
        "LDR	lr, [%[b], #8]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[7] * B[3] */
        "LDR	lr, [%[b], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[7] * B[4] */
        "LDR	lr, [%[b], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[7] * B[5] */
        "LDR	lr, [%[b], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[7] * B[6] */
        "LDR	lr, [%[b], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[7] * B[7] */
        "LDR	lr, [%[b], #28]\n\t"
        "ADC	r10, %[r], #0x0\n\t"
        "UMLAL	r9, r10, r12, lr\n\t"
        "ADD	lr, sp, #0x20\n\t"
        "STM	lr, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        /* Start Reduction */
        "LDM	sp, {r5, r6, r7, r8, r9, r10, r11, r12}\n\t"
        "MOV	r3, r11\n\t"
        "MOV	r4, r12\n\t"
        /* mu = a[0..7] + a[0..5] << 64 - a[0..4] << 96 */
        /*    + a[0..3] << 128 - (a[0..2] * 2) << 160 */
        /*    + (a[0..1] * 2) << 192 - (a[0..0] * 4) << 224 */
        /*    - (a[0..0] * 4) << (7 * 32) */
        "SUB	r12, r12, r5, LSL #2\n\t"
        /*    + (a[0..1] * 2) << (6 * 32) */
        "ADDS	r11, r11, r5, LSL #1\n\t"
        "MOV	r2, r10\n\t"
        "ADC	r12, r12, r6, LSL #1\n\t"
        "ADD	r12, r12, r5, LSR #31\n\t"
        /*    - (a[0..2] * 2) << (5 * 32) */
        "SUBS	r10, r10, r5, LSL #1\n\t"
        "SBCS	r11, r11, r6, LSL #1\n\t"
        "SBC	r12, r12, r7, LSL #1\n\t"
        "SUBS	r11, r11, r5, LSR #31\n\t"
        "MOV	r1, r9\n\t"
        "SBC	r12, r12, r6, LSR #31\n\t"
        /*    + a[0..3] << (4 * 32) */
        "ADDS	r9, r9, r5\n\t"
        "ADCS	r10, r10, r6\n\t"
        "ADCS	r11, r11, r7\n\t"
        "MOV	r0, r8\n\t"
        "ADC	r12, r12, r8\n\t"
        /*    - a[0..4] << (3 * 32) */
        "SUBS	r8, r8, r5\n\t"
        "SBCS	r9, r9, r6\n\t"
        "SBCS	r10, r10, r7\n\t"
        "SBCS	r11, r11, r0\n\t"
        "MOV	lr, r7\n\t"
        "SBC	r12, r12, r1\n\t"
        /*    + a[0..5] << (2 * 32) */
        "ADDS	r7, r7, r5\n\t"
        "ADCS	r8, r8, r6\n\t"
        "ADCS	r9, r9, lr\n\t"
        "ADCS	r10, r10, r0\n\t"
        "ADCS	r11, r11, r1\n\t"
        "ADC	r12, r12, r2\n\t"
        /* a += (mu << 256) - (mu << 224) - (mu << 96) + (mu << 64) - mu */
        /* a[0]   =              = t[0] */
        /* a[1]   =              = t[1] */
        /* a[2]  +=         t[0] = t[2] */
        /* a[3]  +=         t[1] = t[3] + t[0] */
        /* a[4]  +=         t[2] = t[4] + t[1] */
        /* a[5]  +=         t[3] = t[5] + t[2] */
        /* a[6]  +=         t[4] = t[6] + t[3] */
        /* a[7]  +=         t[5] = t[7] + t[4] + t[0] */
        "ADDS	lr, lr, r5\n\t"
        "ADCS	r0, r0, r6\n\t"
        "ADCS	r1, r1, r7\n\t"
        "ADCS	r2, r2, r8\n\t"
        "ADCS	r3, r3, r9\n\t"
        "ADCS	r4, r4, r10\n\t"
        "ADD	lr, sp, #0xc\n\t"
        "STM	lr, {r0, r1, r2, r3, r4}\n\t"
        /* a[8]  +=  t[0] + t[6] = r[0] + t[5] + t[1] */
        /* a[9]  +=  t[1] + t[7] = r[1] + t[6] + t[2] */
        /* a[10] +=  t[2]        = r[2] + t[7] + t[3] */
        /* a[11] +=  t[3]        = r[3] +        t[4] */
        "ADD	r0, sp, #0x20\n\t"
        "LDM	r0, {r1, r2, r3, r4}\n\t"
        "ADCS	r1, r1, r5\n\t"
        "ADCS	r2, r2, r6\n\t"
        "ADCS	r3, r3, r7\n\t"
        "ADCS	r4, r4, r8\n\t"
        "MOV	lr, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "ADDS	r1, r1, r11\n\t"
        "ADCS	r2, r2, r12\n\t"
        "ADCS	r3, r3, #0x0\n\t"
        "ADCS	r4, r4, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "STM	r0, {r1, r2, r3, r4}\n\t"
        /* a[12] +=  t[4]        = r[4] +        t[5] */
        /* a[13] +=  t[5]        = r[5] +        t[6] */
        /* a[14] +=  t[6]        = r[6] +        t[7] */
        /* a[15] +=  t[7]        = r[7] */
        "ADD	r0, sp, #0x30\n\t"
        "LDM	r0, {r1, r2, r3, r4}\n\t"
        "ADDS	lr, lr, #0x-1\n\t"
        "ADCS	r1, r1, r9\n\t"
        "ADCS	r2, r2, r10\n\t"
        "ADCS	r3, r3, r11\n\t"
        "ADCS	r4, r4, r12\n\t"
        "MOV	lr, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "STM	r0, {r1, r2, r3, r4}\n\t"
        "STR	lr, [sp, #4]\n\t"
        /* a[3]  += -t[0]        = t[3] */
        /* a[4]  += -t[1]        = t[4] */
        /* a[5]  += -t[2]        = t[5] */
        /* a[6]  += -t[3]        = t[6] */
        "ADD	r0, sp, #0xc\n\t"
        "LDM	r0, {r0, r1, r2, r3}\n\t"
        "SUBS	r0, r0, r5\n\t"
        "SBCS	r1, r1, r6\n\t"
        "SBCS	r2, r2, r7\n\t"
        "SBCS	r3, r3, r8\n\t"
        /* a[7]  += -t[4] - t[0] = t[7] */
        /* a[8]  += -t[5] - t[1] = r[0] */
        /* a[9]  += -t[6] - t[2] = r[1] */
        /* a[10] += -t[7] - t[3] = r[2] */
        "ADD	r0, sp, #0x1c\n\t"
        "LDM	r0, {r0, r1, r2, r3}\n\t"
        "SBCS	r0, r0, r9\n\t"
        "SBCS	r1, r1, r10\n\t"
        "SBCS	r2, r2, r11\n\t"
        "SBCS	r3, r3, r12\n\t"
        "MOV	lr, #0x0\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "SUBS	r0, r0, r5\n\t"
        "SBCS	r1, r1, r6\n\t"
        "SBCS	r2, r2, r7\n\t"
        "SBCS	r3, r3, r8\n\t"
        "SBC	lr, lr, #0x0\n\t"
        /* a[11] +=       - t[4] = r[3] */
        /* a[12] +=       - t[5] = r[4] */
        /* a[13] +=       - t[6] = r[5] */
        /* a[14] +=       - t[7] = r[6] */
        /* a[15] +=              = r[7] */
        "ADD	r0, sp, #0x2c\n\t"
        "LDM	r0, {r4, r5, r6, r7, r8}\n\t"
        "RSB	lr, lr, #0x0\n\t"
        "SUBS	r4, r4, lr\n\t"
        "SBCS	r5, r5, #0x0\n\t"
        "SBCS	r6, r6, #0x0\n\t"
        "SBCS	r7, r7, #0x0\n\t"
        "SBCS	r8, r8, #0x0\n\t"
        "MOV	lr, #0x0\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "SUBS	r4, r4, r9\n\t"
        "SBCS	r5, r5, r10\n\t"
        "SBCS	r6, r6, r11\n\t"
        "SBCS	r7, r7, r12\n\t"
        "SBCS	r8, r8, #0x0\n\t"
        "LDR	r0, [sp, #4]\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "ADD	lr, lr, r0\n\t"
        /* mask m and sub from result if overflow */
        "RSB	lr, lr, #0x0\n\t"
        "SUBS	r1, r1, lr\n\t"
        "SBCS	r2, r2, lr\n\t"
        "SBCS	r3, r3, #0x0\n\t"
        "SBCS	r4, r4, lr\n\t"
        "SBCS	r5, r5, lr\n\t"
        "SBCS	r6, r6, lr\n\t"
        "SBCS	r7, r7, lr\n\t"
        "SBC	r8, r8, lr, LSL #1\n\t"
        "LDR	%[r], [sp, #64]\n\t"
        "STM	%[r], {r1, r2, r3, r4, r5, r6, r7, r8}\n\t"
        "ADD	sp, sp, #0x44\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "lr", "cc"
    );
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)m_p;
#else
    (void)m;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)mp_p;
#else
    (void)mp;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
}

#else
/* Multiply two Montgomery form numbers mod the modulus (prime).
 * (r = a * b mod m)
 *
 * r   Result of multiplication.
 * a   First number to multiply in Montgomery form.
 * b   Second number to multiply in Montgomery form.
 * m   Modulus (prime).
 * mp  Montgomery multiplier.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static void sp_256_mont_mul_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p, const sp_digit* m_p, sp_digit mp_p)
#else
static void sp_256_mont_mul_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b, const sp_digit* m, sp_digit mp)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "SUB	sp, sp, #0x4c\n\t"
        "STRD	%[r], %[a], [sp, #68]\n\t"
        "MOV	lr, %[b]\n\t"
        "LDM	%[a], {%[r], %[a], %[b], r3}\n\t"
        "LDM	lr!, {r4, r5, r6}\n\t"
        "UMULL	r10, r11, %[r], r4\n\t"
        "UMULL	r12, r7, %[a], r4\n\t"
        "UMAAL	r11, r12, %[r], r5\n\t"
        "UMULL	r8, r9, %[b], r4\n\t"
        "UMAAL	r12, r8, %[a], r5\n\t"
        "UMAAL	r12, r7, %[r], r6\n\t"
        "UMAAL	r8, r9, r3, r4\n\t"
        "STM	sp, {r10, r11, r12}\n\t"
        "UMAAL	r7, r8, %[b], r5\n\t"
        "LDM	lr!, {r4}\n\t"
        "UMULL	r10, r11, %[a], r6\n\t"
        "UMAAL	r8, r9, %[b], r6\n\t"
        "UMAAL	r7, r10, %[r], r4\n\t"
        "UMAAL	r8, r11, r3, r5\n\t"
        "STR	r7, [sp, #12]\n\t"
        "UMAAL	r8, r10, %[a], r4\n\t"
        "UMAAL	r9, r11, r3, r6\n\t"
        "UMAAL	r9, r10, %[b], r4\n\t"
        "UMAAL	r10, r11, r3, r4\n\t"
        "LDM	lr, {r4, r5, r6, r7}\n\t"
        "MOV	r12, #0x0\n\t"
        "UMLAL	r8, r12, %[r], r4\n\t"
        "UMAAL	r9, r12, %[a], r4\n\t"
        "UMAAL	r10, r12, %[b], r4\n\t"
        "UMAAL	r11, r12, r3, r4\n\t"
        "MOV	r4, #0x0\n\t"
        "UMLAL	r9, r4, %[r], r5\n\t"
        "UMAAL	r10, r4, %[a], r5\n\t"
        "UMAAL	r11, r4, %[b], r5\n\t"
        "UMAAL	r12, r4, r3, r5\n\t"
        "MOV	r5, #0x0\n\t"
        "UMLAL	r10, r5, %[r], r6\n\t"
        "UMAAL	r11, r5, %[a], r6\n\t"
        "UMAAL	r12, r5, %[b], r6\n\t"
        "UMAAL	r4, r5, r3, r6\n\t"
        "MOV	r6, #0x0\n\t"
        "UMLAL	r11, r6, %[r], r7\n\t"
        "LDR	%[r], [sp, #72]\n\t"
        "UMAAL	r12, r6, %[a], r7\n\t"
        "ADD	%[r], %[r], #0x10\n\t"
        "UMAAL	r4, r6, %[b], r7\n\t"
        "SUB	lr, lr, #0x10\n\t"
        "UMAAL	r5, r6, r3, r7\n\t"
        "LDM	%[r], {%[r], %[a], %[b], r3}\n\t"
        "STR	r6, [sp, #64]\n\t"
        "LDM	lr!, {r6}\n\t"
        "MOV	r7, #0x0\n\t"
        "UMLAL	r8, r7, %[r], r6\n\t"
        "UMAAL	r9, r7, %[a], r6\n\t"
        "STR	r8, [sp, #16]\n\t"
        "UMAAL	r10, r7, %[b], r6\n\t"
        "UMAAL	r11, r7, r3, r6\n\t"
        "LDM	lr!, {r6}\n\t"
        "MOV	r8, #0x0\n\t"
        "UMLAL	r9, r8, %[r], r6\n\t"
        "UMAAL	r10, r8, %[a], r6\n\t"
        "STR	r9, [sp, #20]\n\t"
        "UMAAL	r11, r8, %[b], r6\n\t"
        "UMAAL	r12, r8, r3, r6\n\t"
        "LDM	lr!, {r6}\n\t"
        "MOV	r9, #0x0\n\t"
        "UMLAL	r10, r9, %[r], r6\n\t"
        "UMAAL	r11, r9, %[a], r6\n\t"
        "STR	r10, [sp, #24]\n\t"
        "UMAAL	r12, r9, %[b], r6\n\t"
        "UMAAL	r4, r9, r3, r6\n\t"
        "LDM	lr!, {r6}\n\t"
        "MOV	r10, #0x0\n\t"
        "UMLAL	r11, r10, %[r], r6\n\t"
        "UMAAL	r12, r10, %[a], r6\n\t"
        "STR	r11, [sp, #28]\n\t"
        "UMAAL	r4, r10, %[b], r6\n\t"
        "UMAAL	r5, r10, r3, r6\n\t"
        "LDM	lr!, {r11}\n\t"
        "UMAAL	r12, r7, %[r], r11\n\t"
        "UMAAL	r4, r7, %[a], r11\n\t"
        "LDR	r6, [sp, #64]\n\t"
        "UMAAL	r5, r7, %[b], r11\n\t"
        "UMAAL	r6, r7, r3, r11\n\t"
        "LDM	lr!, {r11}\n\t"
        "UMAAL	r4, r8, %[r], r11\n\t"
        "UMAAL	r5, r8, %[a], r11\n\t"
        "UMAAL	r6, r8, %[b], r11\n\t"
        "UMAAL	r7, r8, r3, r11\n\t"
        "LDM	lr, {r11, lr}\n\t"
        "UMAAL	r5, r9, %[r], r11\n\t"
        "UMAAL	r6, r10, %[r], lr\n\t"
        "UMAAL	r6, r9, %[a], r11\n\t"
        "UMAAL	r7, r10, %[a], lr\n\t"
        "UMAAL	r7, r9, %[b], r11\n\t"
        "UMAAL	r8, r10, %[b], lr\n\t"
        "UMAAL	r8, r9, r3, r11\n\t"
        "UMAAL	r9, r10, r3, lr\n\t"
        "MOV	r3, r12\n\t"
        "ADD	lr, sp, #0x20\n\t"
        "STM	lr, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        /* Start Reduction */
        "LDM	sp, {r5, r6, r7, r8, r9, r10, r11, r12}\n\t"
        "MOV	r3, r11\n\t"
        "MOV	r4, r12\n\t"
        /* mu = a[0..7] + a[0..5] << 64 - a[0..4] << 96 */
        /*    + a[0..3] << 128 - (a[0..2] * 2) << 160 */
        /*    + (a[0..1] * 2) << 192 - (a[0..0] * 4) << 224 */
        /*    - (a[0..0] * 4) << (7 * 32) */
        "SUB	r12, r12, r5, LSL #2\n\t"
        /*    + (a[0..1] * 2) << (6 * 32) */
        "ADDS	r11, r11, r5, LSL #1\n\t"
        "MOV	r2, r10\n\t"
        "ADC	r12, r12, r6, LSL #1\n\t"
        "ADD	r12, r12, r5, LSR #31\n\t"
        /*    - (a[0..2] * 2) << (5 * 32) */
        "SUBS	r10, r10, r5, LSL #1\n\t"
        "SBCS	r11, r11, r6, LSL #1\n\t"
        "SBC	r12, r12, r7, LSL #1\n\t"
        "SUBS	r11, r11, r5, LSR #31\n\t"
        "MOV	r1, r9\n\t"
        "SBC	r12, r12, r6, LSR #31\n\t"
        /*    + a[0..3] << (4 * 32) */
        "ADDS	r9, r9, r5\n\t"
        "ADCS	r10, r10, r6\n\t"
        "ADCS	r11, r11, r7\n\t"
        "MOV	r0, r8\n\t"
        "ADC	r12, r12, r8\n\t"
        /*    - a[0..4] << (3 * 32) */
        "SUBS	r8, r8, r5\n\t"
        "SBCS	r9, r9, r6\n\t"
        "SBCS	r10, r10, r7\n\t"
        "SBCS	r11, r11, r0\n\t"
        "MOV	lr, r7\n\t"
        "SBC	r12, r12, r1\n\t"
        /*    + a[0..5] << (2 * 32) */
        "ADDS	r7, r7, r5\n\t"
        "ADCS	r8, r8, r6\n\t"
        "ADCS	r9, r9, lr\n\t"
        "ADCS	r10, r10, r0\n\t"
        "ADCS	r11, r11, r1\n\t"
        "ADC	r12, r12, r2\n\t"
        /* a += (mu << 256) - (mu << 224) - (mu << 96) + (mu << 64) - mu */
        /* a[0]   =              = t[0] */
        /* a[1]   =              = t[1] */
        /* a[2]  +=         t[0] = t[2] */
        /* a[3]  +=         t[1] = t[3] + t[0] */
        /* a[4]  +=         t[2] = t[4] + t[1] */
        /* a[5]  +=         t[3] = t[5] + t[2] */
        /* a[6]  +=         t[4] = t[6] + t[3] */
        /* a[7]  +=         t[5] = t[7] + t[4] + t[0] */
        "ADDS	lr, lr, r5\n\t"
        "ADCS	r0, r0, r6\n\t"
        "ADCS	r1, r1, r7\n\t"
        "ADCS	r2, r2, r8\n\t"
        "ADCS	r3, r3, r9\n\t"
        "ADCS	r4, r4, r10\n\t"
        "ADD	lr, sp, #0xc\n\t"
        "STM	lr, {r0, r1, r2, r3, r4}\n\t"
        /* a[8]  +=  t[0] + t[6] = r[0] + t[5] + t[1] */
        /* a[9]  +=  t[1] + t[7] = r[1] + t[6] + t[2] */
        /* a[10] +=  t[2]        = r[2] + t[7] + t[3] */
        /* a[11] +=  t[3]        = r[3] +        t[4] */
        "ADD	r0, sp, #0x20\n\t"
        "LDM	r0, {r1, r2, r3, r4}\n\t"
        "ADCS	r1, r1, r5\n\t"
        "ADCS	r2, r2, r6\n\t"
        "ADCS	r3, r3, r7\n\t"
        "ADCS	r4, r4, r8\n\t"
        "MOV	lr, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "ADDS	r1, r1, r11\n\t"
        "ADCS	r2, r2, r12\n\t"
        "ADCS	r3, r3, #0x0\n\t"
        "ADCS	r4, r4, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "STM	r0, {r1, r2, r3, r4}\n\t"
        /* a[12] +=  t[4]        = r[4] +        t[5] */
        /* a[13] +=  t[5]        = r[5] +        t[6] */
        /* a[14] +=  t[6]        = r[6] +        t[7] */
        /* a[15] +=  t[7]        = r[7] */
        "ADD	r0, sp, #0x30\n\t"
        "LDM	r0, {r1, r2, r3, r4}\n\t"
        "ADDS	lr, lr, #0x-1\n\t"
        "ADCS	r1, r1, r9\n\t"
        "ADCS	r2, r2, r10\n\t"
        "ADCS	r3, r3, r11\n\t"
        "ADCS	r4, r4, r12\n\t"
        "MOV	lr, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "STM	r0, {r1, r2, r3, r4}\n\t"
        "STR	lr, [sp, #4]\n\t"
        /* a[3]  += -t[0]        = t[3] */
        /* a[4]  += -t[1]        = t[4] */
        /* a[5]  += -t[2]        = t[5] */
        /* a[6]  += -t[3]        = t[6] */
        "ADD	r0, sp, #0xc\n\t"
        "LDM	r0, {r0, r1, r2, r3}\n\t"
        "SUBS	r0, r0, r5\n\t"
        "SBCS	r1, r1, r6\n\t"
        "SBCS	r2, r2, r7\n\t"
        "SBCS	r3, r3, r8\n\t"
        /* a[7]  += -t[4] - t[0] = t[7] */
        /* a[8]  += -t[5] - t[1] = r[0] */
        /* a[9]  += -t[6] - t[2] = r[1] */
        /* a[10] += -t[7] - t[3] = r[2] */
        "ADD	r0, sp, #0x1c\n\t"
        "LDM	r0, {r0, r1, r2, r3}\n\t"
        "SBCS	r0, r0, r9\n\t"
        "SBCS	r1, r1, r10\n\t"
        "SBCS	r2, r2, r11\n\t"
        "SBCS	r3, r3, r12\n\t"
        "MOV	lr, #0x0\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "SUBS	r0, r0, r5\n\t"
        "SBCS	r1, r1, r6\n\t"
        "SBCS	r2, r2, r7\n\t"
        "SBCS	r3, r3, r8\n\t"
        "SBC	lr, lr, #0x0\n\t"
        /* a[11] +=       - t[4] = r[3] */
        /* a[12] +=       - t[5] = r[4] */
        /* a[13] +=       - t[6] = r[5] */
        /* a[14] +=       - t[7] = r[6] */
        /* a[15] +=              = r[7] */
        "ADD	r0, sp, #0x2c\n\t"
        "LDM	r0, {r4, r5, r6, r7, r8}\n\t"
        "RSB	lr, lr, #0x0\n\t"
        "SUBS	r4, r4, lr\n\t"
        "SBCS	r5, r5, #0x0\n\t"
        "SBCS	r6, r6, #0x0\n\t"
        "SBCS	r7, r7, #0x0\n\t"
        "SBCS	r8, r8, #0x0\n\t"
        "MOV	lr, #0x0\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "SUBS	r4, r4, r9\n\t"
        "SBCS	r5, r5, r10\n\t"
        "SBCS	r6, r6, r11\n\t"
        "SBCS	r7, r7, r12\n\t"
        "SBCS	r8, r8, #0x0\n\t"
        "LDR	r0, [sp, #4]\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "ADD	lr, lr, r0\n\t"
        /* mask m and sub from result if overflow */
        "RSB	lr, lr, #0x0\n\t"
        "SUBS	r1, r1, lr\n\t"
        "SBCS	r2, r2, lr\n\t"
        "SBCS	r3, r3, #0x0\n\t"
        "SBCS	r4, r4, lr\n\t"
        "SBCS	r5, r5, lr\n\t"
        "SBCS	r6, r6, lr\n\t"
        "SBCS	r7, r7, lr\n\t"
        "SBC	r8, r8, lr, LSL #1\n\t"
        "LDR	%[r], [sp, #68]\n\t"
        "STM	%[r], {r1, r2, r3, r4, r5, r6, r7, r8}\n\t"
        "ADD	sp, sp, #0x4c\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r3", "r4", "r5", "r6", "r10", "r11", "r12", "r7", "r8", "r9", "lr", "cc"
    );
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)m_p;
#else
    (void)m;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)mp_p;
#else
    (void)mp;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
}

#endif
#ifdef WOLFSSL_SP_NO_UMAAL
/* Square the Montgomery form number mod the modulus (prime). (r = a * a mod m)
 *
 * r   Result of squaring.
 * a   Number to square in Montgomery form.
 * m   Modulus (prime).
 * mp  Montgomery multiplier.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static void sp_256_mont_sqr_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* m_p, sp_digit mp_p)
#else
static void sp_256_mont_sqr_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* m, sp_digit mp)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "SUB	sp, sp, #0x44\n\t"
        "STR	%[r], [sp, #64]\n\t"
        "MOV	%[r], #0x0\n\t"
        "LDR	r12, [%[a]]\n\t"
        /* A[0] * A[1] */
        "LDR	lr, [%[a], #4]\n\t"
        "UMULL	r4, r5, r12, lr\n\t"
        /* A[0] * A[3] */
        "LDR	lr, [%[a], #12]\n\t"
        "UMULL	r6, r7, r12, lr\n\t"
        /* A[0] * A[5] */
        "LDR	lr, [%[a], #20]\n\t"
        "UMULL	r8, r9, r12, lr\n\t"
        /* A[0] * A[7] */
        "LDR	lr, [%[a], #28]\n\t"
        "UMULL	r10, r3, r12, lr\n\t"
        /* A[0] * A[2] */
        "LDR	lr, [%[a], #8]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[0] * A[4] */
        "LDR	lr, [%[a], #16]\n\t"
        "ADCS	r7, r7, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[0] * A[6] */
        "LDR	lr, [%[a], #24]\n\t"
        "ADCS	r9, r9, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        "ADCS	r3, r3, #0x0\n\t"
        "STR	r4, [sp, #4]\n\t"
        "STR	r5, [sp, #8]\n\t"
        /* A[1] * A[2] */
        "LDR	r12, [%[a], #4]\n\t"
        "LDR	lr, [%[a], #8]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "STR	r6, [sp, #12]\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[1] * A[3] */
        "LDR	lr, [%[a], #12]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, lr\n\t"
        "STR	r7, [sp, #16]\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[1] * A[4] */
        "LDR	lr, [%[a], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[1] * A[5] */
        "LDR	lr, [%[a], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[1] * A[6] */
        "LDR	lr, [%[a], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[1] * A[7] */
        "LDR	lr, [%[a], #28]\n\t"
        "ADC	r4, %[r], #0x0\n\t"
        "UMLAL	r3, r4, r12, lr\n\t"
        /* A[2] * A[3] */
        "LDR	r12, [%[a], #8]\n\t"
        "LDR	lr, [%[a], #12]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r8, r11, r12, lr\n\t"
        "STR	r8, [sp, #20]\n\t"
        "ADDS	r9, r9, r11\n\t"
        /* A[2] * A[4] */
        "LDR	lr, [%[a], #16]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, lr\n\t"
        "STR	r9, [sp, #24]\n\t"
        "ADDS	r10, r10, r11\n\t"
        /* A[2] * A[5] */
        "LDR	lr, [%[a], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[2] * A[6] */
        "LDR	lr, [%[a], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[2] * A[7] */
        "LDR	lr, [%[a], #28]\n\t"
        "ADC	r5, %[r], #0x0\n\t"
        "UMLAL	r4, r5, r12, lr\n\t"
        /* A[3] * A[4] */
        "LDR	r12, [%[a], #12]\n\t"
        "LDR	lr, [%[a], #16]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r10, r11, r12, lr\n\t"
        "STR	r10, [sp, #28]\n\t"
        "ADDS	r3, r3, r11\n\t"
        /* A[3] * A[5] */
        "LDR	lr, [%[a], #20]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, lr\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[3] * A[6] */
        "LDR	lr, [%[a], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[3] * A[7] */
        "LDR	lr, [%[a], #28]\n\t"
        "ADC	r6, %[r], #0x0\n\t"
        "UMLAL	r5, r6, r12, lr\n\t"
        /* A[4] * A[5] */
        "LDR	r12, [%[a], #16]\n\t"
        "LDR	lr, [%[a], #20]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r4, r11, r12, lr\n\t"
        "ADDS	r5, r5, r11\n\t"
        /* A[4] * A[6] */
        "LDR	lr, [%[a], #24]\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, lr\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[4] * A[7] */
        "LDR	lr, [%[a], #28]\n\t"
        "ADC	r7, %[r], #0x0\n\t"
        "UMLAL	r6, r7, r12, lr\n\t"
        /* A[5] * A[6] */
        "LDR	r12, [%[a], #20]\n\t"
        "LDR	lr, [%[a], #24]\n\t"
        "MOV	r11, #0x0\n\t"
        "UMLAL	r6, r11, r12, lr\n\t"
        "ADDS	r7, r7, r11\n\t"
        /* A[5] * A[7] */
        "LDR	lr, [%[a], #28]\n\t"
        "ADC	r8, %[r], #0x0\n\t"
        "UMLAL	r7, r8, r12, lr\n\t"
        /* A[6] * A[7] */
        "LDR	r12, [%[a], #24]\n\t"
        "LDR	lr, [%[a], #28]\n\t"
        "MOV	r9, #0x0\n\t"
        "UMLAL	r8, r9, r12, lr\n\t"
        "ADD	lr, sp, #0x20\n\t"
        "STM	lr, {r3, r4, r5, r6, r7, r8, r9}\n\t"
        "ADD	lr, sp, #0x4\n\t"
        "LDM	lr, {r4, r5, r6, r7, r8, r9, r10}\n\t"
        "ADDS	r4, r4, r4\n\t"
        "ADCS	r5, r5, r5\n\t"
        "ADCS	r6, r6, r6\n\t"
        "ADCS	r7, r7, r7\n\t"
        "ADCS	r8, r8, r8\n\t"
        "ADCS	r9, r9, r9\n\t"
        "ADCS	r10, r10, r10\n\t"
        "STM	lr!, {r4, r5, r6, r7, r8, r9, r10}\n\t"
        "LDM	lr, {r3, r4, r5, r6, r7, r8, r9}\n\t"
        "ADCS	r3, r3, r3\n\t"
        "ADCS	r4, r4, r4\n\t"
        "ADCS	r5, r5, r5\n\t"
        "ADCS	r6, r6, r6\n\t"
        "ADCS	r7, r7, r7\n\t"
        "ADCS	r8, r8, r8\n\t"
        "ADCS	r9, r9, r9\n\t"
        "ADC	r10, %[r], #0x0\n\t"
        "STM	lr, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        "ADD	lr, sp, #0x4\n\t"
        "LDM	lr, {r4, r5, r6, r7, r8, r9, r10}\n\t"
        "MOV	lr, sp\n\t"
        /* A[0] * A[0] */
        "LDR	r12, [%[a]]\n\t"
        "UMULL	r3, r11, r12, r12\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[1] * A[1] */
        "LDR	r12, [%[a], #4]\n\t"
        "ADCS	r5, r5, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, r12\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[2] * A[2] */
        "LDR	r12, [%[a], #8]\n\t"
        "ADCS	r7, r7, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, r12\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[3] * A[3] */
        "LDR	r12, [%[a], #12]\n\t"
        "ADCS	r9, r9, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r9, r11, r12, r12\n\t"
        "ADDS	r10, r10, r11\n\t"
        "STM	lr!, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        "LDM	lr, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        /* A[4] * A[4] */
        "LDR	r12, [%[a], #16]\n\t"
        "ADCS	r3, r3, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r3, r11, r12, r12\n\t"
        "ADDS	r4, r4, r11\n\t"
        /* A[5] * A[5] */
        "LDR	r12, [%[a], #20]\n\t"
        "ADCS	r5, r5, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r5, r11, r12, r12\n\t"
        "ADDS	r6, r6, r11\n\t"
        /* A[6] * A[6] */
        "LDR	r12, [%[a], #24]\n\t"
        "ADCS	r7, r7, #0x0\n\t"
        "ADC	r11, %[r], #0x0\n\t"
        "UMLAL	r7, r11, r12, r12\n\t"
        "ADDS	r8, r8, r11\n\t"
        /* A[7] * A[7] */
        "LDR	r12, [%[a], #28]\n\t"
        "ADCS	r9, r9, #0x0\n\t"
        "ADC	r10, r10, #0x0\n\t"
        "UMLAL	r9, r10, r12, r12\n\t"
        "ADD	lr, sp, #0x20\n\t"
        "STM	lr, {r3, r4, r5, r6, r7, r8, r9, r10}\n\t"
        /* Start Reduction */
        "LDM	sp, {r5, r6, r7, r8, r9, r10, r11, r12}\n\t"
        "MOV	r3, r11\n\t"
        "MOV	r4, r12\n\t"
        /* mu = a[0..7] + a[0..5] << 64 - a[0..4] << 96 */
        /*    + a[0..3] << 128 - (a[0..2] * 2) << 160 */
        /*    + (a[0..1] * 2) << 192 - (a[0..0] * 4) << 224 */
        /*    - (a[0..0] * 4) << (7 * 32) */
        "SUB	r12, r12, r5, LSL #2\n\t"
        /*    + (a[0..1] * 2) << (6 * 32) */
        "ADDS	r11, r11, r5, LSL #1\n\t"
        "MOV	r2, r10\n\t"
        "ADC	r12, r12, r6, LSL #1\n\t"
        "ADD	r12, r12, r5, LSR #31\n\t"
        /*    - (a[0..2] * 2) << (5 * 32) */
        "SUBS	r10, r10, r5, LSL #1\n\t"
        "SBCS	r11, r11, r6, LSL #1\n\t"
        "SBC	r12, r12, r7, LSL #1\n\t"
        "SUBS	r11, r11, r5, LSR #31\n\t"
        "MOV	r1, r9\n\t"
        "SBC	r12, r12, r6, LSR #31\n\t"
        /*    + a[0..3] << (4 * 32) */
        "ADDS	r9, r9, r5\n\t"
        "ADCS	r10, r10, r6\n\t"
        "ADCS	r11, r11, r7\n\t"
        "MOV	r0, r8\n\t"
        "ADC	r12, r12, r8\n\t"
        /*    - a[0..4] << (3 * 32) */
        "SUBS	r8, r8, r5\n\t"
        "SBCS	r9, r9, r6\n\t"
        "SBCS	r10, r10, r7\n\t"
        "SBCS	r11, r11, r0\n\t"
        "MOV	lr, r7\n\t"
        "SBC	r12, r12, r1\n\t"
        /*    + a[0..5] << (2 * 32) */
        "ADDS	r7, r7, r5\n\t"
        "ADCS	r8, r8, r6\n\t"
        "ADCS	r9, r9, lr\n\t"
        "ADCS	r10, r10, r0\n\t"
        "ADCS	r11, r11, r1\n\t"
        "ADC	r12, r12, r2\n\t"
        /* a += (mu << 256) - (mu << 224) - (mu << 96) + (mu << 64) - mu */
        /* a[0]   =              = t[0] */
        /* a[1]   =              = t[1] */
        /* a[2]  +=         t[0] = t[2] */
        /* a[3]  +=         t[1] = t[3] + t[0] */
        /* a[4]  +=         t[2] = t[4] + t[1] */
        /* a[5]  +=         t[3] = t[5] + t[2] */
        /* a[6]  +=         t[4] = t[6] + t[3] */
        /* a[7]  +=         t[5] = t[7] + t[4] + t[0] */
        "ADDS	lr, lr, r5\n\t"
        "ADCS	r0, r0, r6\n\t"
        "ADCS	r1, r1, r7\n\t"
        "ADCS	r2, r2, r8\n\t"
        "ADCS	r3, r3, r9\n\t"
        "ADCS	r4, r4, r10\n\t"
        "ADD	lr, sp, #0xc\n\t"
        "STM	lr, {r0, r1, r2, r3, r4}\n\t"
        /* a[8]  +=  t[0] + t[6] = r[0] + t[5] + t[1] */
        /* a[9]  +=  t[1] + t[7] = r[1] + t[6] + t[2] */
        /* a[10] +=  t[2]        = r[2] + t[7] + t[3] */
        /* a[11] +=  t[3]        = r[3] +        t[4] */
        "ADD	r0, sp, #0x20\n\t"
        "LDM	r0, {r1, r2, r3, r4}\n\t"
        "ADCS	r1, r1, r5\n\t"
        "ADCS	r2, r2, r6\n\t"
        "ADCS	r3, r3, r7\n\t"
        "ADCS	r4, r4, r8\n\t"
        "MOV	lr, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "ADDS	r1, r1, r11\n\t"
        "ADCS	r2, r2, r12\n\t"
        "ADCS	r3, r3, #0x0\n\t"
        "ADCS	r4, r4, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "STM	r0, {r1, r2, r3, r4}\n\t"
        /* a[12] +=  t[4]        = r[4] +        t[5] */
        /* a[13] +=  t[5]        = r[5] +        t[6] */
        /* a[14] +=  t[6]        = r[6] +        t[7] */
        /* a[15] +=  t[7]        = r[7] */
        "ADD	r0, sp, #0x30\n\t"
        "LDM	r0, {r1, r2, r3, r4}\n\t"
        "ADDS	lr, lr, #0x-1\n\t"
        "ADCS	r1, r1, r9\n\t"
        "ADCS	r2, r2, r10\n\t"
        "ADCS	r3, r3, r11\n\t"
        "ADCS	r4, r4, r12\n\t"
        "MOV	lr, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "STM	r0, {r1, r2, r3, r4}\n\t"
        "STR	lr, [sp, #4]\n\t"
        /* a[3]  += -t[0]        = t[3] */
        /* a[4]  += -t[1]        = t[4] */
        /* a[5]  += -t[2]        = t[5] */
        /* a[6]  += -t[3]        = t[6] */
        "ADD	r0, sp, #0xc\n\t"
        "LDM	r0, {r0, r1, r2, r3}\n\t"
        "SUBS	r0, r0, r5\n\t"
        "SBCS	r1, r1, r6\n\t"
        "SBCS	r2, r2, r7\n\t"
        "SBCS	r3, r3, r8\n\t"
        /* a[7]  += -t[4] - t[0] = t[7] */
        /* a[8]  += -t[5] - t[1] = r[0] */
        /* a[9]  += -t[6] - t[2] = r[1] */
        /* a[10] += -t[7] - t[3] = r[2] */
        "ADD	r0, sp, #0x1c\n\t"
        "LDM	r0, {r0, r1, r2, r3}\n\t"
        "SBCS	r0, r0, r9\n\t"
        "SBCS	r1, r1, r10\n\t"
        "SBCS	r2, r2, r11\n\t"
        "SBCS	r3, r3, r12\n\t"
        "MOV	lr, #0x0\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "SUBS	r0, r0, r5\n\t"
        "SBCS	r1, r1, r6\n\t"
        "SBCS	r2, r2, r7\n\t"
        "SBCS	r3, r3, r8\n\t"
        "SBC	lr, lr, #0x0\n\t"
        /* a[11] +=       - t[4] = r[3] */
        /* a[12] +=       - t[5] = r[4] */
        /* a[13] +=       - t[6] = r[5] */
        /* a[14] +=       - t[7] = r[6] */
        /* a[15] +=              = r[7] */
        "ADD	r0, sp, #0x2c\n\t"
        "LDM	r0, {r4, r5, r6, r7, r8}\n\t"
        "RSB	lr, lr, #0x0\n\t"
        "SUBS	r4, r4, lr\n\t"
        "SBCS	r5, r5, #0x0\n\t"
        "SBCS	r6, r6, #0x0\n\t"
        "SBCS	r7, r7, #0x0\n\t"
        "SBCS	r8, r8, #0x0\n\t"
        "MOV	lr, #0x0\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "SUBS	r4, r4, r9\n\t"
        "SBCS	r5, r5, r10\n\t"
        "SBCS	r6, r6, r11\n\t"
        "SBCS	r7, r7, r12\n\t"
        "SBCS	r8, r8, #0x0\n\t"
        "LDR	r0, [sp, #4]\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "ADD	lr, lr, r0\n\t"
        /* mask m and sub from result if overflow */
        "RSB	lr, lr, #0x0\n\t"
        "SUBS	r1, r1, lr\n\t"
        "SBCS	r2, r2, lr\n\t"
        "SBCS	r3, r3, #0x0\n\t"
        "SBCS	r4, r4, lr\n\t"
        "SBCS	r5, r5, lr\n\t"
        "SBCS	r6, r6, lr\n\t"
        "SBCS	r7, r7, lr\n\t"
        "SBC	r8, r8, lr, LSL #1\n\t"
        "LDR	%[r], [sp, #64]\n\t"
        "STM	%[r], {r1, r2, r3, r4, r5, r6, r7, r8}\n\t"
        "ADD	sp, sp, #0x44\n\t"
        : [r] "+r" (r), [a] "+r" (a)
        :
        : "memory", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "lr", "cc"
    );
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)m_p;
#else
    (void)m;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)mp_p;
#else
    (void)mp;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
}

#else
/* Square the Montgomery form number mod the modulus (prime). (r = a * a mod m)
 *
 * r   Result of squaring.
 * a   Number to square in Montgomery form.
 * m   Modulus (prime).
 * mp  Montgomery multiplier.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static void sp_256_mont_sqr_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* m_p, sp_digit mp_p)
#else
static void sp_256_mont_sqr_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* m, sp_digit mp)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "SUB	sp, sp, #0x44\n\t"
        "STR	%[r], [sp, #64]\n\t"
        "LDM	%[a], {%[r], %[a], r2, r3, r4, r5, r6, r7}\n\t"
        "UMULL	r9, r10, %[r], %[r]\n\t"
        "UMULL	r11, r12, %[r], %[a]\n\t"
        "ADDS	r11, r11, r11\n\t"
        "MOV	lr, #0x0\n\t"
        "UMAAL	r10, r11, lr, lr\n\t"
        "STM	sp, {r9, r10}\n\t"
        "MOV	r8, lr\n\t"
        "UMAAL	r8, r12, %[r], r2\n\t"
        "ADCS	r8, r8, r8\n\t"
        "UMAAL	r8, r11, %[a], %[a]\n\t"
        "UMULL	r9, r10, %[r], r3\n\t"
        "UMAAL	r9, r12, %[a], r2\n\t"
        "ADCS	r9, r9, r9\n\t"
        "UMAAL	r9, r11, lr, lr\n\t"
        "STRD	r8, r9, [sp, #8]\n\t"
        "MOV	r9, lr\n\t"
        "UMAAL	r9, r10, %[r], r4\n\t"
        "UMAAL	r9, r12, %[a], r3\n\t"
        "ADCS	r9, r9, r9\n\t"
        "UMAAL	r9, r11, r2, r2\n\t"
        "STR	r9, [sp, #16]\n\t"
        "UMULL	r9, r8, %[r], r5\n\t"
        "UMAAL	r9, r12, %[a], r4\n\t"
        "UMAAL	r9, r10, r2, r3\n\t"
        "ADCS	r9, r9, r9\n\t"
        "UMAAL	r9, r11, lr, lr\n\t"
        "STR	r9, [sp, #20]\n\t"
        "MOV	r9, lr\n\t"
        "UMAAL	r9, r8, %[r], r6\n\t"
        "UMAAL	r9, r12, %[a], r5\n\t"
        "UMAAL	r9, r10, r2, r4\n\t"
        "ADCS	r9, r9, r9\n\t"
        "UMAAL	r9, r11, r3, r3\n\t"
        "STR	r9, [sp, #24]\n\t"
        "UMULL	%[r], r9, %[r], r7\n\t"
        "UMAAL	%[r], r8, %[a], r6\n\t"
        "UMAAL	%[r], r12, r2, r5\n\t"
        "UMAAL	%[r], r10, r3, r4\n\t"
        "ADCS	%[r], %[r], %[r]\n\t"
        "UMAAL	%[r], r11, lr, lr\n\t"
        /* R[7] = r0 */
        "UMAAL	r9, r8, %[a], r7\n\t"
        "UMAAL	r9, r10, r2, r6\n\t"
        "UMAAL	r12, r9, r3, r5\n\t"
        "ADCS	r12, r12, r12\n\t"
        "UMAAL	r12, r11, r4, r4\n\t"
        /* R[8] = r12 */
        "UMAAL	r9, r8, r2, r7\n\t"
        "UMAAL	r10, r9, r3, r6\n\t"
        "MOV	r2, lr\n\t"
        "UMAAL	r10, r2, r4, r5\n\t"
        "ADCS	r10, r10, r10\n\t"
        "UMAAL	r11, r10, lr, lr\n\t"
        /* R[9] = r11 */
        "UMAAL	r2, r8, r3, r7\n\t"
        "UMAAL	r2, r9, r4, r6\n\t"
        "ADCS	r3, r2, r2\n\t"
        "UMAAL	r10, r3, r5, r5\n\t"
        /* R[10] = r10 */
        "MOV	%[a], lr\n\t"
        "UMAAL	%[a], r8, r4, r7\n\t"
        "UMAAL	%[a], r9, r5, r6\n\t"
        "ADCS	r4, %[a], %[a]\n\t"
        "UMAAL	r3, r4, lr, lr\n\t"
        /* R[11] = r3 */
        "UMAAL	r8, r9, r5, r7\n\t"
        "ADCS	r8, r8, r8\n\t"
        "UMAAL	r4, r8, r6, r6\n\t"
        /* R[12] = r4 */
        "MOV	r5, lr\n\t"
        "UMAAL	r5, r9, r6, r7\n\t"
        "ADCS	r5, r5, r5\n\t"
        "UMAAL	r8, r5, lr, lr\n\t"
        /* R[13] = r8 */
        "ADCS	r9, r9, r9\n\t"
        "UMAAL	r9, r5, r7, r7\n\t"
        "ADCS	r7, r5, lr\n\t"
        /* R[14] = r9 */
        /* R[15] = r7 */
        "MOV	lr, sp\n\t"
        "ADD	lr, lr, #0x1c\n\t"
        "STM	lr!, {%[r], r12}\n\t"
        "STM	lr!, {r11}\n\t"
        "STM	lr!, {r10}\n\t"
        "STM	lr!, {r3, r4, r8, r9}\n\t"
        "STM	lr!, {r7}\n\t"
        /* Start Reduction */
        "LDM	sp, {r5, r6, r7, r8, r9, r10, r11, r12}\n\t"
        "MOV	r3, r11\n\t"
        "MOV	r4, r12\n\t"
        /* mu = a[0..7] + a[0..5] << 64 - a[0..4] << 96 */
        /*    + a[0..3] << 128 - (a[0..2] * 2) << 160 */
        /*    + (a[0..1] * 2) << 192 - (a[0..0] * 4) << 224 */
        /*    - (a[0..0] * 4) << (7 * 32) */
        "SUB	r12, r12, r5, LSL #2\n\t"
        /*    + (a[0..1] * 2) << (6 * 32) */
        "ADDS	r11, r11, r5, LSL #1\n\t"
        "MOV	r2, r10\n\t"
        "ADC	r12, r12, r6, LSL #1\n\t"
        "ADD	r12, r12, r5, LSR #31\n\t"
        /*    - (a[0..2] * 2) << (5 * 32) */
        "SUBS	r10, r10, r5, LSL #1\n\t"
        "SBCS	r11, r11, r6, LSL #1\n\t"
        "SBC	r12, r12, r7, LSL #1\n\t"
        "SUBS	r11, r11, r5, LSR #31\n\t"
        "MOV	r1, r9\n\t"
        "SBC	r12, r12, r6, LSR #31\n\t"
        /*    + a[0..3] << (4 * 32) */
        "ADDS	r9, r9, r5\n\t"
        "ADCS	r10, r10, r6\n\t"
        "ADCS	r11, r11, r7\n\t"
        "MOV	r0, r8\n\t"
        "ADC	r12, r12, r8\n\t"
        /*    - a[0..4] << (3 * 32) */
        "SUBS	r8, r8, r5\n\t"
        "SBCS	r9, r9, r6\n\t"
        "SBCS	r10, r10, r7\n\t"
        "SBCS	r11, r11, r0\n\t"
        "MOV	lr, r7\n\t"
        "SBC	r12, r12, r1\n\t"
        /*    + a[0..5] << (2 * 32) */
        "ADDS	r7, r7, r5\n\t"
        "ADCS	r8, r8, r6\n\t"
        "ADCS	r9, r9, lr\n\t"
        "ADCS	r10, r10, r0\n\t"
        "ADCS	r11, r11, r1\n\t"
        "ADC	r12, r12, r2\n\t"
        /* a += (mu << 256) - (mu << 224) - (mu << 96) + (mu << 64) - mu */
        /* a[0]   =              = t[0] */
        /* a[1]   =              = t[1] */
        /* a[2]  +=         t[0] = t[2] */
        /* a[3]  +=         t[1] = t[3] + t[0] */
        /* a[4]  +=         t[2] = t[4] + t[1] */
        /* a[5]  +=         t[3] = t[5] + t[2] */
        /* a[6]  +=         t[4] = t[6] + t[3] */
        /* a[7]  +=         t[5] = t[7] + t[4] + t[0] */
        "ADDS	lr, lr, r5\n\t"
        "ADCS	r0, r0, r6\n\t"
        "ADCS	r1, r1, r7\n\t"
        "ADCS	r2, r2, r8\n\t"
        "ADCS	r3, r3, r9\n\t"
        "ADCS	r4, r4, r10\n\t"
        "ADD	lr, sp, #0xc\n\t"
        "STM	lr, {r0, r1, r2, r3, r4}\n\t"
        /* a[8]  +=  t[0] + t[6] = r[0] + t[5] + t[1] */
        /* a[9]  +=  t[1] + t[7] = r[1] + t[6] + t[2] */
        /* a[10] +=  t[2]        = r[2] + t[7] + t[3] */
        /* a[11] +=  t[3]        = r[3] +        t[4] */
        "ADD	r0, sp, #0x20\n\t"
        "LDM	r0, {r1, r2, r3, r4}\n\t"
        "ADCS	r1, r1, r5\n\t"
        "ADCS	r2, r2, r6\n\t"
        "ADCS	r3, r3, r7\n\t"
        "ADCS	r4, r4, r8\n\t"
        "MOV	lr, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "ADDS	r1, r1, r11\n\t"
        "ADCS	r2, r2, r12\n\t"
        "ADCS	r3, r3, #0x0\n\t"
        "ADCS	r4, r4, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "STM	r0, {r1, r2, r3, r4}\n\t"
        /* a[12] +=  t[4]        = r[4] +        t[5] */
        /* a[13] +=  t[5]        = r[5] +        t[6] */
        /* a[14] +=  t[6]        = r[6] +        t[7] */
        /* a[15] +=  t[7]        = r[7] */
        "ADD	r0, sp, #0x30\n\t"
        "LDM	r0, {r1, r2, r3, r4}\n\t"
        "ADDS	lr, lr, #0x-1\n\t"
        "ADCS	r1, r1, r9\n\t"
        "ADCS	r2, r2, r10\n\t"
        "ADCS	r3, r3, r11\n\t"
        "ADCS	r4, r4, r12\n\t"
        "MOV	lr, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "STM	r0, {r1, r2, r3, r4}\n\t"
        "STR	lr, [sp, #4]\n\t"
        /* a[3]  += -t[0]        = t[3] */
        /* a[4]  += -t[1]        = t[4] */
        /* a[5]  += -t[2]        = t[5] */
        /* a[6]  += -t[3]        = t[6] */
        "ADD	r0, sp, #0xc\n\t"
        "LDM	r0, {r0, r1, r2, r3}\n\t"
        "SUBS	r0, r0, r5\n\t"
        "SBCS	r1, r1, r6\n\t"
        "SBCS	r2, r2, r7\n\t"
        "SBCS	r3, r3, r8\n\t"
        /* a[7]  += -t[4] - t[0] = t[7] */
        /* a[8]  += -t[5] - t[1] = r[0] */
        /* a[9]  += -t[6] - t[2] = r[1] */
        /* a[10] += -t[7] - t[3] = r[2] */
        "ADD	r0, sp, #0x1c\n\t"
        "LDM	r0, {r0, r1, r2, r3}\n\t"
        "SBCS	r0, r0, r9\n\t"
        "SBCS	r1, r1, r10\n\t"
        "SBCS	r2, r2, r11\n\t"
        "SBCS	r3, r3, r12\n\t"
        "MOV	lr, #0x0\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "SUBS	r0, r0, r5\n\t"
        "SBCS	r1, r1, r6\n\t"
        "SBCS	r2, r2, r7\n\t"
        "SBCS	r3, r3, r8\n\t"
        "SBC	lr, lr, #0x0\n\t"
        /* a[11] +=       - t[4] = r[3] */
        /* a[12] +=       - t[5] = r[4] */
        /* a[13] +=       - t[6] = r[5] */
        /* a[14] +=       - t[7] = r[6] */
        /* a[15] +=              = r[7] */
        "ADD	r0, sp, #0x2c\n\t"
        "LDM	r0, {r4, r5, r6, r7, r8}\n\t"
        "RSB	lr, lr, #0x0\n\t"
        "SUBS	r4, r4, lr\n\t"
        "SBCS	r5, r5, #0x0\n\t"
        "SBCS	r6, r6, #0x0\n\t"
        "SBCS	r7, r7, #0x0\n\t"
        "SBCS	r8, r8, #0x0\n\t"
        "MOV	lr, #0x0\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "SUBS	r4, r4, r9\n\t"
        "SBCS	r5, r5, r10\n\t"
        "SBCS	r6, r6, r11\n\t"
        "SBCS	r7, r7, r12\n\t"
        "SBCS	r8, r8, #0x0\n\t"
        "LDR	r0, [sp, #4]\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "ADD	lr, lr, r0\n\t"
        /* mask m and sub from result if overflow */
        "RSB	lr, lr, #0x0\n\t"
        "SUBS	r1, r1, lr\n\t"
        "SBCS	r2, r2, lr\n\t"
        "SBCS	r3, r3, #0x0\n\t"
        "SBCS	r4, r4, lr\n\t"
        "SBCS	r5, r5, lr\n\t"
        "SBCS	r6, r6, lr\n\t"
        "SBCS	r7, r7, lr\n\t"
        "SBC	r8, r8, lr, LSL #1\n\t"
        "LDR	%[r], [sp, #64]\n\t"
        "STM	%[r], {r1, r2, r3, r4, r5, r6, r7, r8}\n\t"
        "ADD	sp, sp, #0x44\n\t"
        : [r] "+r" (r), [a] "+r" (a)
        :
        : "memory", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "lr", "cc"
    );
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)m_p;
#else
    (void)m;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)mp_p;
#else
    (void)mp;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
}

#endif
#if !defined(WOLFSSL_SP_SMALL)
/* Square the Montgomery form number a number of times. (r = a ^ n mod m)
 *
 * r   Result of squaring.
 * a   Number to square in Montgomery form.
 * n   Number of times to square.
 * m   Modulus (prime).
 * mp  Montgomery multiplier.
 */
SP_NOINLINE static void sp_256_mont_sqr_n_sm2_8(sp_digit* r,
    const sp_digit* a, int n, const sp_digit* m, sp_digit mp)
{
    sp_256_mont_sqr_sm2_8(r, a, m, mp);
    for (; n > 1; n--) {
        sp_256_mont_sqr_sm2_8(r, r, m, mp);
    }
}

#endif /* !WOLFSSL_SP_SMALL */
#ifdef WOLFSSL_SP_SMALL
/* Mod-2 for the SM2 P256 curve. */
static const uint32_t p256_sm2_mod_minus_2[8] = {
    0xfffffffdU,0xffffffffU,0x00000000U,0xffffffffU,0xffffffffU,0xffffffffU,
    0xffffffffU,0xfffffffeU
};
#endif /* !WOLFSSL_SP_SMALL */

/* Invert the number, in Montgomery form, modulo the modulus (prime) of the
 * P256 curve. (r = 1 / a mod m)
 *
 * r   Inverse result.
 * a   Number to invert.
 * td  Temporary data.
 */
static void sp_256_mont_inv_sm2_8(sp_digit* r, const sp_digit* a, sp_digit* td)
{
#ifdef WOLFSSL_SP_SMALL
    sp_digit* t = td;
    int i;

    XMEMCPY(t, a, sizeof(sp_digit) * 8);
    for (i=254; i>=0; i--) {
        sp_256_mont_sqr_sm2_8(t, t, p256_sm2_mod, p256_sm2_mp_mod);
        if (p256_sm2_mod_minus_2[i / 32] & ((sp_digit)1 << (i % 32)))
            sp_256_mont_mul_sm2_8(t, t, a, p256_sm2_mod, p256_sm2_mp_mod);
    }
    XMEMCPY(r, t, sizeof(sp_digit) * 8);
#else
    sp_digit* t1 = td;
    sp_digit* t2 = td + 2 * 8;
    sp_digit* t3 = td + 4 * 8;
    sp_digit* t4 = td + 6 * 8;
    /* 0x2 */
    sp_256_mont_sqr_sm2_8(t1, a, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0x3 */
    sp_256_mont_mul_sm2_8(t2, t1, a, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xc */
    sp_256_mont_sqr_n_sm2_8(t1, t2, 2, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xd */
    sp_256_mont_mul_sm2_8(t3, t1, a, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xf */
    sp_256_mont_mul_sm2_8(t2, t2, t1, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xf0 */
    sp_256_mont_sqr_n_sm2_8(t1, t2, 4, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfd */
    sp_256_mont_mul_sm2_8(t3, t3, t1, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xff */
    sp_256_mont_mul_sm2_8(t2, t2, t1, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xff00 */
    sp_256_mont_sqr_n_sm2_8(t1, t2, 8, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffd */
    sp_256_mont_mul_sm2_8(t3, t3, t1, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xffff */
    sp_256_mont_mul_sm2_8(t2, t2, t1, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xffff0000 */
    sp_256_mont_sqr_n_sm2_8(t1, t2, 16, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffd */
    sp_256_mont_mul_sm2_8(t3, t3, t1, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffe */
    sp_256_mont_mul_sm2_8(t2, t3, a, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xffffffff */
    sp_256_mont_mul_sm2_8(t4, t2, a, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffe00000000 */
    sp_256_mont_sqr_n_sm2_8(t2, t2, 32, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffeffffffff */
    sp_256_mont_mul_sm2_8(t2, t4, t2, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffeffffffff00000000 */
    sp_256_mont_sqr_n_sm2_8(t1, t2, 32, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffeffffffffffffffff */
    sp_256_mont_mul_sm2_8(r, t4, t1, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffeffffffffffffffff00000000 */
    sp_256_mont_sqr_n_sm2_8(t1, r, 32, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffeffffffffffffffffffffffff */
    sp_256_mont_mul_sm2_8(r, t4, t1, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffeffffffffffffffffffffffff00000000 */
    sp_256_mont_sqr_n_sm2_8(r, r, 32, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffeffffffffffffffffffffffffffffffff */
    sp_256_mont_mul_sm2_8(r, r, t4, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffeffffffffffffffffffffffffffffffff0000000000000000 */
    sp_256_mont_sqr_n_sm2_8(r, r, 64, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffeffffffffffffffffffffffffffffffff00000000ffffffff */
    sp_256_mont_mul_sm2_8(r, r, t4, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffeffffffffffffffffffffffffffffffff00000000ffffffff00000000 */
    sp_256_mont_sqr_n_sm2_8(r, r, 32, p256_sm2_mod, p256_sm2_mp_mod);
    /* 0xfffffffeffffffffffffffffffffffffffffffff00000000fffffffffffffffd */
    sp_256_mont_mul_sm2_8(r, r, t3, p256_sm2_mod, p256_sm2_mp_mod);
#endif /* WOLFSSL_SP_SMALL */
}

/* Normalize the values in each word to 32.
 *
 * a  Array of sp_digit to normalize.
 */
#define sp_256_norm_8(a)

#ifndef WOLFSSL_SP_SMALL
#define sp_256_mont_reduce_order_sm2_8    sp_256_mont_reduce_sm2_8

#ifdef WOLFSSL_SP_NO_UMAAL
/* Reduce the number back to 256 bits using Montgomery reduction.
 *
 * a   A single precision number to reduce in place.
 * m   The single precision number representing the modulus.
 * mp  The digit representing the negative inverse of m mod 2^n.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static void sp_256_mont_reduce_sm2_8(sp_digit* a_p, const sp_digit* m_p, sp_digit mp_p)
#else
SP_NOINLINE static void sp_256_mont_reduce_sm2_8(sp_digit* a, const sp_digit* m, sp_digit mp)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* a __asm__ ("r0") = (sp_digit*)a_p;
    register const sp_digit* m __asm__ ("r1") = (const sp_digit*)m_p;
    register sp_digit mp __asm__ ("r2") = (sp_digit)mp_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "LDR	lr, [%[m]]\n\t"
        /* i = 0 */
        "MOV	r11, #0x0\n\t"
        "MOV	r3, #0x0\n\t"
        "LDR	r4, [%[a]]\n\t"
        "LDR	r5, [%[a], #4]\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_mont_reduce_sm2_8_word:\n\t"
#else
    "L_sp_256_mont_reduce_sm2_8_word_%=:\n\t"
#endif
        /* mu = a[i] * mp */
        "MUL	r10, %[mp], r4\n\t"
        /* a[i+0] += m[0] * mu */
        "MOV	r7, #0x0\n\t"
        "UMLAL	r4, r7, r10, lr\n\t"
        /* a[i+1] += m[1] * mu */
        "LDR	r9, [%[m], #4]\n\t"
        "MOV	r6, #0x0\n\t"
        "UMLAL	r5, r6, r10, r9\n\t"
        "MOV	r4, r5\n\t"
        "ADDS	r4, r4, r7\n\t"
        "ADC	r6, r6, #0x0\n\t"
        /* a[i+2] += m[2] * mu */
        "LDR	r9, [%[m], #8]\n\t"
        "LDR	r5, [%[a], #8]\n\t"
        "MOV	r7, #0x0\n\t"
        "UMLAL	r5, r7, r10, r9\n\t"
        "ADDS	r5, r5, r6\n\t"
        "ADC	r7, r7, #0x0\n\t"
        /* a[i+3] += m[3] * mu */
        "LDR	r9, [%[m], #12]\n\t"
        "LDR	r12, [%[a], #12]\n\t"
        "MOV	r6, #0x0\n\t"
        "UMLAL	r12, r6, r10, r9\n\t"
        "ADDS	r12, r12, r7\n\t"
        "STR	r12, [%[a], #12]\n\t"
        "ADC	r6, r6, #0x0\n\t"
        /* a[i+4] += m[4] * mu */
        "LDR	r9, [%[m], #16]\n\t"
        "LDR	r12, [%[a], #16]\n\t"
        "MOV	r7, #0x0\n\t"
        "UMLAL	r12, r7, r10, r9\n\t"
        "ADDS	r12, r12, r6\n\t"
        "STR	r12, [%[a], #16]\n\t"
        "ADC	r7, r7, #0x0\n\t"
        /* a[i+5] += m[5] * mu */
        "LDR	r9, [%[m], #20]\n\t"
        "LDR	r12, [%[a], #20]\n\t"
        "MOV	r6, #0x0\n\t"
        "UMLAL	r12, r6, r10, r9\n\t"
        "ADDS	r12, r12, r7\n\t"
        "STR	r12, [%[a], #20]\n\t"
        "ADC	r6, r6, #0x0\n\t"
        /* a[i+6] += m[6] * mu */
        "LDR	r9, [%[m], #24]\n\t"
        "LDR	r12, [%[a], #24]\n\t"
        "MOV	r7, #0x0\n\t"
        "UMLAL	r12, r7, r10, r9\n\t"
        "ADDS	r12, r12, r6\n\t"
        "STR	r12, [%[a], #24]\n\t"
        "ADC	r7, r7, #0x0\n\t"
        /* a[i+7] += m[7] * mu */
        "LDR	r9, [%[m], #28]\n\t"
        "LDR	r12, [%[a], #28]\n\t"
        "UMULL	r8, r9, r10, r9\n\t"
        "ADDS	r7, r7, r8\n\t"
        "ADCS	r6, r9, r3\n\t"
        "MOV	r3, #0x0\n\t"
        "ADC	r3, r3, r3\n\t"
        "ADDS	r12, r12, r7\n\t"
        "STR	r12, [%[a], #28]\n\t"
        "LDR	r12, [%[a], #32]\n\t"
        "ADCS	r12, r12, r6\n\t"
        "STR	r12, [%[a], #32]\n\t"
        "ADC	r3, r3, #0x0\n\t"
        /* i += 1 */
        "ADD	r11, r11, #0x4\n\t"
        "ADD	%[a], %[a], #0x4\n\t"
        "CMP	r11, #0x20\n\t"
#if defined(__GNUC__)
        "BLT	L_sp_256_mont_reduce_sm2_8_word_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BLT.W	L_sp_256_mont_reduce_sm2_8_word\n\t"
#else
        "BLT.W	L_sp_256_mont_reduce_sm2_8_word_%=\n\t"
#endif
        /* Loop Done */
        "STR	r4, [%[a]]\n\t"
        "STR	r5, [%[a], #4]\n\t"
        "MOV	%[mp], r3\n\t"
        : [a] "+r" (a), [m] "+r" (m), [mp] "+r" (mp)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "lr", "cc"
    );
    sp_256_cond_sub_sm2_8(a - 8, a, m, (sp_digit)0 - mp);
}

#else
/* Reduce the number back to 256 bits using Montgomery reduction.
 *
 * a   A single precision number to reduce in place.
 * m   The single precision number representing the modulus.
 * mp  The digit representing the negative inverse of m mod 2^n.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static void sp_256_mont_reduce_sm2_8(sp_digit* a_p, const sp_digit* m_p, sp_digit mp_p)
#else
SP_NOINLINE static void sp_256_mont_reduce_sm2_8(sp_digit* a, const sp_digit* m, sp_digit mp)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* a __asm__ ("r0") = (sp_digit*)a_p;
    register const sp_digit* m __asm__ ("r1") = (const sp_digit*)m_p;
    register sp_digit mp __asm__ ("r2") = (sp_digit)mp_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        /* i = 0 */
        "MOV	r4, #0x0\n\t"
        "MOV	r5, #0x0\n\t"
        "LDR	r6, [%[a]]\n\t"
        "LDR	r7, [%[a], #4]\n\t"
        "LDR	r8, [%[a], #8]\n\t"
        "LDR	r9, [%[a], #12]\n\t"
        "LDR	r10, [%[a], #16]\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_mont_reduce_sm2_8_word:\n\t"
#else
    "L_sp_256_mont_reduce_sm2_8_word_%=:\n\t"
#endif
        /* mu = a[i] * mp */
        "MUL	lr, %[mp], r6\n\t"
        /* a[i+0] += m[0] * mu */
        "LDR	r12, [%[m]]\n\t"
        "MOV	r3, #0x0\n\t"
        "UMAAL	r6, r3, lr, r12\n\t"
        /* a[i+1] += m[1] * mu */
        "LDR	r12, [%[m], #4]\n\t"
        "MOV	r6, r7\n\t"
        "UMAAL	r6, r3, lr, r12\n\t"
        /* a[i+2] += m[2] * mu */
        "LDR	r12, [%[m], #8]\n\t"
        "MOV	r7, r8\n\t"
        "UMAAL	r7, r3, lr, r12\n\t"
        /* a[i+3] += m[3] * mu */
        "LDR	r12, [%[m], #12]\n\t"
        "MOV	r8, r9\n\t"
        "UMAAL	r8, r3, lr, r12\n\t"
        /* a[i+4] += m[4] * mu */
        "LDR	r12, [%[m], #16]\n\t"
        "MOV	r9, r10\n\t"
        "UMAAL	r9, r3, lr, r12\n\t"
        /* a[i+5] += m[5] * mu */
        "LDR	r12, [%[m], #20]\n\t"
        "LDR	r10, [%[a], #20]\n\t"
        "UMAAL	r10, r3, lr, r12\n\t"
        /* a[i+6] += m[6] * mu */
        "LDR	r12, [%[m], #24]\n\t"
        "LDR	r11, [%[a], #24]\n\t"
        "UMAAL	r11, r3, lr, r12\n\t"
        "STR	r11, [%[a], #24]\n\t"
        /* a[i+7] += m[7] * mu */
        "LDR	r12, [%[m], #28]\n\t"
        "LDR	r11, [%[a], #28]\n\t"
        "UMAAL	r11, r3, lr, r12\n\t"
        "LDR	lr, [%[a], #32]\n\t"
        "MOV	r12, #0x0\n\t"
        "UMAAL	r3, lr, r12, r12\n\t"
        "STR	r11, [%[a], #28]\n\t"
        "ADDS	r3, r3, r5\n\t"
        "ADC	r5, lr, #0x0\n\t"
        "STR	r3, [%[a], #32]\n\t"
        /* i += 1 */
        "ADD	r4, r4, #0x4\n\t"
        "ADD	%[a], %[a], #0x4\n\t"
        "CMP	r4, #0x20\n\t"
#if defined(__GNUC__)
        "BLT	L_sp_256_mont_reduce_sm2_8_word_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BLT.W	L_sp_256_mont_reduce_sm2_8_word\n\t"
#else
        "BLT.W	L_sp_256_mont_reduce_sm2_8_word_%=\n\t"
#endif
        /* Loop Done */
        "STR	r6, [%[a]]\n\t"
        "STR	r7, [%[a], #4]\n\t"
        "STR	r8, [%[a], #8]\n\t"
        "STR	r9, [%[a], #12]\n\t"
        "STR	r10, [%[a], #16]\n\t"
        "MOV	%[mp], r5\n\t"
        : [a] "+r" (a), [m] "+r" (m), [mp] "+r" (mp)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "lr", "cc"
    );
    sp_256_cond_sub_sm2_8(a - 8, a, m, (sp_digit)0 - mp);
}

#endif
#else
/* Reduce the number back to 256 bits using Montgomery reduction.
 *
 * a   A single precision number to reduce in place.
 * m   The single precision number representing the modulus.
 * mp  The digit representing the negative inverse of m mod 2^n.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static void sp_256_mont_reduce_sm2_8(sp_digit* a_p, const sp_digit* m_p, sp_digit mp_p)
#else
static void sp_256_mont_reduce_sm2_8(sp_digit* a, const sp_digit* m, sp_digit mp)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* a __asm__ ("r0") = (sp_digit*)a_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "SUB	sp, sp, #0x44\n\t"
        "STR	%[a], [sp, #64]\n\t"
        "MOV	lr, sp\n\t"
        "LDM	%[a]!, {r1, r2, r3, r4, r5, r6, r7, r8}\n\t"
        "STM	lr!, {r1, r2, r3, r4, r5, r6, r7, r8}\n\t"
        "LDM	%[a], {r1, r2, r3, r4, r5, r6, r7, r8}\n\t"
        "STM	lr, {r1, r2, r3, r4, r5, r6, r7, r8}\n\t"
        /* Start Reduction */
        "LDM	sp, {r5, r6, r7, r8, r9, r10, r11, r12}\n\t"
        "MOV	r3, r11\n\t"
        "MOV	r4, r12\n\t"
        /* mu = a[0..7] + a[0..5] << 64 - a[0..4] << 96 */
        /*    + a[0..3] << 128 - (a[0..2] * 2) << 160 */
        /*    + (a[0..1] * 2) << 192 - (a[0..0] * 4) << 224 */
        /*    - (a[0..0] * 4) << (7 * 32) */
        "SUB	r12, r12, r5, LSL #2\n\t"
        /*    + (a[0..1] * 2) << (6 * 32) */
        "ADDS	r11, r11, r5, LSL #1\n\t"
        "MOV	r2, r10\n\t"
        "ADC	r12, r12, r6, LSL #1\n\t"
        "ADD	r12, r12, r5, LSR #31\n\t"
        /*    - (a[0..2] * 2) << (5 * 32) */
        "SUBS	r10, r10, r5, LSL #1\n\t"
        "SBCS	r11, r11, r6, LSL #1\n\t"
        "SBC	r12, r12, r7, LSL #1\n\t"
        "SUBS	r11, r11, r5, LSR #31\n\t"
        "MOV	r1, r9\n\t"
        "SBC	r12, r12, r6, LSR #31\n\t"
        /*    + a[0..3] << (4 * 32) */
        "ADDS	r9, r9, r5\n\t"
        "ADCS	r10, r10, r6\n\t"
        "ADCS	r11, r11, r7\n\t"
        "MOV	r0, r8\n\t"
        "ADC	r12, r12, r8\n\t"
        /*    - a[0..4] << (3 * 32) */
        "SUBS	r8, r8, r5\n\t"
        "SBCS	r9, r9, r6\n\t"
        "SBCS	r10, r10, r7\n\t"
        "SBCS	r11, r11, r0\n\t"
        "MOV	lr, r7\n\t"
        "SBC	r12, r12, r1\n\t"
        /*    + a[0..5] << (2 * 32) */
        "ADDS	r7, r7, r5\n\t"
        "ADCS	r8, r8, r6\n\t"
        "ADCS	r9, r9, lr\n\t"
        "ADCS	r10, r10, r0\n\t"
        "ADCS	r11, r11, r1\n\t"
        "ADC	r12, r12, r2\n\t"
        /* a += (mu << 256) - (mu << 224) - (mu << 96) + (mu << 64) - mu */
        /* a[0]   =              = t[0] */
        /* a[1]   =              = t[1] */
        /* a[2]  +=         t[0] = t[2] */
        /* a[3]  +=         t[1] = t[3] + t[0] */
        /* a[4]  +=         t[2] = t[4] + t[1] */
        /* a[5]  +=         t[3] = t[5] + t[2] */
        /* a[6]  +=         t[4] = t[6] + t[3] */
        /* a[7]  +=         t[5] = t[7] + t[4] + t[0] */
        "ADDS	lr, lr, r5\n\t"
        "ADCS	r0, r0, r6\n\t"
        "ADCS	r1, r1, r7\n\t"
        "ADCS	r2, r2, r8\n\t"
        "ADCS	r3, r3, r9\n\t"
        "ADCS	r4, r4, r10\n\t"
        "ADD	lr, sp, #0xc\n\t"
        "STM	lr, {r0, r1, r2, r3, r4}\n\t"
        /* a[8]  +=  t[0] + t[6] = r[0] + t[5] + t[1] */
        /* a[9]  +=  t[1] + t[7] = r[1] + t[6] + t[2] */
        /* a[10] +=  t[2]        = r[2] + t[7] + t[3] */
        /* a[11] +=  t[3]        = r[3] +        t[4] */
        "ADD	r0, sp, #0x20\n\t"
        "LDM	r0, {r1, r2, r3, r4}\n\t"
        "ADCS	r1, r1, r5\n\t"
        "ADCS	r2, r2, r6\n\t"
        "ADCS	r3, r3, r7\n\t"
        "ADCS	r4, r4, r8\n\t"
        "MOV	lr, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "ADDS	r1, r1, r11\n\t"
        "ADCS	r2, r2, r12\n\t"
        "ADCS	r3, r3, #0x0\n\t"
        "ADCS	r4, r4, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "STM	r0, {r1, r2, r3, r4}\n\t"
        /* a[12] +=  t[4]        = r[4] +        t[5] */
        /* a[13] +=  t[5]        = r[5] +        t[6] */
        /* a[14] +=  t[6]        = r[6] +        t[7] */
        /* a[15] +=  t[7]        = r[7] */
        "ADD	r0, sp, #0x30\n\t"
        "LDM	r0, {r1, r2, r3, r4}\n\t"
        "ADDS	lr, lr, #0x-1\n\t"
        "ADCS	r1, r1, r9\n\t"
        "ADCS	r2, r2, r10\n\t"
        "ADCS	r3, r3, r11\n\t"
        "ADCS	r4, r4, r12\n\t"
        "MOV	lr, #0x0\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "STM	r0, {r1, r2, r3, r4}\n\t"
        "STR	lr, [sp, #4]\n\t"
        /* a[3]  += -t[0]        = t[3] */
        /* a[4]  += -t[1]        = t[4] */
        /* a[5]  += -t[2]        = t[5] */
        /* a[6]  += -t[3]        = t[6] */
        "ADD	r0, sp, #0xc\n\t"
        "LDM	r0, {r0, r1, r2, r3}\n\t"
        "SUBS	r0, r0, r5\n\t"
        "SBCS	r1, r1, r6\n\t"
        "SBCS	r2, r2, r7\n\t"
        "SBCS	r3, r3, r8\n\t"
        /* a[7]  += -t[4] - t[0] = t[7] */
        /* a[8]  += -t[5] - t[1] = r[0] */
        /* a[9]  += -t[6] - t[2] = r[1] */
        /* a[10] += -t[7] - t[3] = r[2] */
        "ADD	r0, sp, #0x1c\n\t"
        "LDM	r0, {r0, r1, r2, r3}\n\t"
        "SBCS	r0, r0, r9\n\t"
        "SBCS	r1, r1, r10\n\t"
        "SBCS	r2, r2, r11\n\t"
        "SBCS	r3, r3, r12\n\t"
        "MOV	lr, #0x0\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "SUBS	r0, r0, r5\n\t"
        "SBCS	r1, r1, r6\n\t"
        "SBCS	r2, r2, r7\n\t"
        "SBCS	r3, r3, r8\n\t"
        "SBC	lr, lr, #0x0\n\t"
        /* a[11] +=       - t[4] = r[3] */
        /* a[12] +=       - t[5] = r[4] */
        /* a[13] +=       - t[6] = r[5] */
        /* a[14] +=       - t[7] = r[6] */
        /* a[15] +=              = r[7] */
        "ADD	r0, sp, #0x2c\n\t"
        "LDM	r0, {r4, r5, r6, r7, r8}\n\t"
        "RSB	lr, lr, #0x0\n\t"
        "SUBS	r4, r4, lr\n\t"
        "SBCS	r5, r5, #0x0\n\t"
        "SBCS	r6, r6, #0x0\n\t"
        "SBCS	r7, r7, #0x0\n\t"
        "SBCS	r8, r8, #0x0\n\t"
        "MOV	lr, #0x0\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "SUBS	r4, r4, r9\n\t"
        "SBCS	r5, r5, r10\n\t"
        "SBCS	r6, r6, r11\n\t"
        "SBCS	r7, r7, r12\n\t"
        "SBCS	r8, r8, #0x0\n\t"
        "LDR	r0, [sp, #4]\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "ADD	lr, lr, r0\n\t"
        /* mask m and sub from result if overflow */
        "RSB	lr, lr, #0x0\n\t"
        "SUBS	r1, r1, lr\n\t"
        "SBCS	r2, r2, lr\n\t"
        "SBCS	r3, r3, #0x0\n\t"
        "SBCS	r4, r4, lr\n\t"
        "SBCS	r5, r5, lr\n\t"
        "SBCS	r6, r6, lr\n\t"
        "SBCS	r7, r7, lr\n\t"
        "SBC	r8, r8, lr, LSL #1\n\t"
        "LDR	%[a], [sp, #64]\n\t"
        "STM	%[a], {r1, r2, r3, r4, r5, r6, r7, r8}\n\t"
        "ADD	sp, sp, #0x44\n\t"
        : [a] "+r" (a)
        :
        : "memory", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "lr", "cc"
    );
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)m_p;
#else
    (void)m;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)mp_p;
#else
    (void)mp;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
}

#ifdef WOLFSSL_SP_NO_UMAAL
/* Reduce the number back to 256 bits using Montgomery reduction.
 *
 * a   A single precision number to reduce in place.
 * m   The single precision number representing the modulus.
 * mp  The digit representing the negative inverse of m mod 2^n.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static void sp_256_mont_reduce_order_sm2_8(sp_digit* a_p, const sp_digit* m_p, sp_digit mp_p)
#else
SP_NOINLINE static void sp_256_mont_reduce_order_sm2_8(sp_digit* a, const sp_digit* m, sp_digit mp)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* a __asm__ ("r0") = (sp_digit*)a_p;
    register const sp_digit* m __asm__ ("r1") = (const sp_digit*)m_p;
    register sp_digit mp __asm__ ("r2") = (sp_digit)mp_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "LDR	lr, [%[m]]\n\t"
        /* i = 0 */
        "MOV	r11, #0x0\n\t"
        "MOV	r3, #0x0\n\t"
        "LDR	r4, [%[a]]\n\t"
        "LDR	r5, [%[a], #4]\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_mont_reduce_order_sm2_8_word:\n\t"
#else
    "L_sp_256_mont_reduce_order_sm2_8_word_%=:\n\t"
#endif
        /* mu = a[i] * mp */
        "MUL	r10, %[mp], r4\n\t"
        /* a[i+0] += m[0] * mu */
        "MOV	r7, #0x0\n\t"
        "UMLAL	r4, r7, r10, lr\n\t"
        /* a[i+1] += m[1] * mu */
        "LDR	r9, [%[m], #4]\n\t"
        "MOV	r6, #0x0\n\t"
        "UMLAL	r5, r6, r10, r9\n\t"
        "MOV	r4, r5\n\t"
        "ADDS	r4, r4, r7\n\t"
        "ADC	r6, r6, #0x0\n\t"
        /* a[i+2] += m[2] * mu */
        "LDR	r9, [%[m], #8]\n\t"
        "LDR	r5, [%[a], #8]\n\t"
        "MOV	r7, #0x0\n\t"
        "UMLAL	r5, r7, r10, r9\n\t"
        "ADDS	r5, r5, r6\n\t"
        "ADC	r7, r7, #0x0\n\t"
        /* a[i+3] += m[3] * mu */
        "LDR	r9, [%[m], #12]\n\t"
        "LDR	r12, [%[a], #12]\n\t"
        "MOV	r6, #0x0\n\t"
        "UMLAL	r12, r6, r10, r9\n\t"
        "ADDS	r12, r12, r7\n\t"
        "STR	r12, [%[a], #12]\n\t"
        "ADC	r6, r6, #0x0\n\t"
        /* a[i+4] += m[4] * mu */
        "LDR	r9, [%[m], #16]\n\t"
        "LDR	r12, [%[a], #16]\n\t"
        "MOV	r7, #0x0\n\t"
        "UMLAL	r12, r7, r10, r9\n\t"
        "ADDS	r12, r12, r6\n\t"
        "STR	r12, [%[a], #16]\n\t"
        "ADC	r7, r7, #0x0\n\t"
        /* a[i+5] += m[5] * mu */
        "LDR	r9, [%[m], #20]\n\t"
        "LDR	r12, [%[a], #20]\n\t"
        "MOV	r6, #0x0\n\t"
        "UMLAL	r12, r6, r10, r9\n\t"
        "ADDS	r12, r12, r7\n\t"
        "STR	r12, [%[a], #20]\n\t"
        "ADC	r6, r6, #0x0\n\t"
        /* a[i+6] += m[6] * mu */
        "LDR	r9, [%[m], #24]\n\t"
        "LDR	r12, [%[a], #24]\n\t"
        "MOV	r7, #0x0\n\t"
        "UMLAL	r12, r7, r10, r9\n\t"
        "ADDS	r12, r12, r6\n\t"
        "STR	r12, [%[a], #24]\n\t"
        "ADC	r7, r7, #0x0\n\t"
        /* a[i+7] += m[7] * mu */
        "LDR	r9, [%[m], #28]\n\t"
        "LDR	r12, [%[a], #28]\n\t"
        "UMULL	r8, r9, r10, r9\n\t"
        "ADDS	r7, r7, r8\n\t"
        "ADCS	r6, r9, r3\n\t"
        "MOV	r3, #0x0\n\t"
        "ADC	r3, r3, r3\n\t"
        "ADDS	r12, r12, r7\n\t"
        "STR	r12, [%[a], #28]\n\t"
        "LDR	r12, [%[a], #32]\n\t"
        "ADCS	r12, r12, r6\n\t"
        "STR	r12, [%[a], #32]\n\t"
        "ADC	r3, r3, #0x0\n\t"
        /* i += 1 */
        "ADD	r11, r11, #0x4\n\t"
        "ADD	%[a], %[a], #0x4\n\t"
        "CMP	r11, #0x20\n\t"
#if defined(__GNUC__)
        "BLT	L_sp_256_mont_reduce_order_sm2_8_word_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BLT.W	L_sp_256_mont_reduce_order_sm2_8_word\n\t"
#else
        "BLT.W	L_sp_256_mont_reduce_order_sm2_8_word_%=\n\t"
#endif
        /* Loop Done */
        "STR	r4, [%[a]]\n\t"
        "STR	r5, [%[a], #4]\n\t"
        "MOV	%[mp], r3\n\t"
        : [a] "+r" (a), [m] "+r" (m), [mp] "+r" (mp)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "lr", "cc"
    );
    sp_256_cond_sub_sm2_8(a - 8, a, m, (sp_digit)0 - mp);
}

#else
/* Reduce the number back to 256 bits using Montgomery reduction.
 *
 * a   A single precision number to reduce in place.
 * m   The single precision number representing the modulus.
 * mp  The digit representing the negative inverse of m mod 2^n.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static void sp_256_mont_reduce_order_sm2_8(sp_digit* a_p, const sp_digit* m_p, sp_digit mp_p)
#else
SP_NOINLINE static void sp_256_mont_reduce_order_sm2_8(sp_digit* a, const sp_digit* m, sp_digit mp)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* a __asm__ ("r0") = (sp_digit*)a_p;
    register const sp_digit* m __asm__ ("r1") = (const sp_digit*)m_p;
    register sp_digit mp __asm__ ("r2") = (sp_digit)mp_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        /* i = 0 */
        "MOV	r4, #0x0\n\t"
        "MOV	r5, #0x0\n\t"
        "LDR	r6, [%[a]]\n\t"
        "LDR	r7, [%[a], #4]\n\t"
        "LDR	r8, [%[a], #8]\n\t"
        "LDR	r9, [%[a], #12]\n\t"
        "LDR	r10, [%[a], #16]\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_mont_reduce_order_sm2_8_word:\n\t"
#else
    "L_sp_256_mont_reduce_order_sm2_8_word_%=:\n\t"
#endif
        /* mu = a[i] * mp */
        "MUL	lr, %[mp], r6\n\t"
        /* a[i+0] += m[0] * mu */
        "LDR	r12, [%[m]]\n\t"
        "MOV	r3, #0x0\n\t"
        "UMAAL	r6, r3, lr, r12\n\t"
        /* a[i+1] += m[1] * mu */
        "LDR	r12, [%[m], #4]\n\t"
        "MOV	r6, r7\n\t"
        "UMAAL	r6, r3, lr, r12\n\t"
        /* a[i+2] += m[2] * mu */
        "LDR	r12, [%[m], #8]\n\t"
        "MOV	r7, r8\n\t"
        "UMAAL	r7, r3, lr, r12\n\t"
        /* a[i+3] += m[3] * mu */
        "LDR	r12, [%[m], #12]\n\t"
        "MOV	r8, r9\n\t"
        "UMAAL	r8, r3, lr, r12\n\t"
        /* a[i+4] += m[4] * mu */
        "LDR	r12, [%[m], #16]\n\t"
        "MOV	r9, r10\n\t"
        "UMAAL	r9, r3, lr, r12\n\t"
        /* a[i+5] += m[5] * mu */
        "LDR	r12, [%[m], #20]\n\t"
        "LDR	r10, [%[a], #20]\n\t"
        "UMAAL	r10, r3, lr, r12\n\t"
        /* a[i+6] += m[6] * mu */
        "LDR	r12, [%[m], #24]\n\t"
        "LDR	r11, [%[a], #24]\n\t"
        "UMAAL	r11, r3, lr, r12\n\t"
        "STR	r11, [%[a], #24]\n\t"
        /* a[i+7] += m[7] * mu */
        "LDR	r12, [%[m], #28]\n\t"
        "LDR	r11, [%[a], #28]\n\t"
        "UMAAL	r11, r3, lr, r12\n\t"
        "LDR	lr, [%[a], #32]\n\t"
        "MOV	r12, #0x0\n\t"
        "UMAAL	r3, lr, r12, r12\n\t"
        "STR	r11, [%[a], #28]\n\t"
        "ADDS	r3, r3, r5\n\t"
        "ADC	r5, lr, #0x0\n\t"
        "STR	r3, [%[a], #32]\n\t"
        /* i += 1 */
        "ADD	r4, r4, #0x4\n\t"
        "ADD	%[a], %[a], #0x4\n\t"
        "CMP	r4, #0x20\n\t"
#if defined(__GNUC__)
        "BLT	L_sp_256_mont_reduce_order_sm2_8_word_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BLT.W	L_sp_256_mont_reduce_order_sm2_8_word\n\t"
#else
        "BLT.W	L_sp_256_mont_reduce_order_sm2_8_word_%=\n\t"
#endif
        /* Loop Done */
        "STR	r6, [%[a]]\n\t"
        "STR	r7, [%[a], #4]\n\t"
        "STR	r8, [%[a], #8]\n\t"
        "STR	r9, [%[a], #12]\n\t"
        "STR	r10, [%[a], #16]\n\t"
        "MOV	%[mp], r5\n\t"
        : [a] "+r" (a), [m] "+r" (m), [mp] "+r" (mp)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "lr", "cc"
    );
    sp_256_cond_sub_sm2_8(a - 8, a, m, (sp_digit)0 - mp);
}

#endif
#endif /* WOLFSSL_SP_SMALL */
/* Map the Montgomery form projective coordinate point to an affine point.
 *
 * r  Resulting affine coordinate point.
 * p  Montgomery form projective coordinate point.
 * t  Temporary ordinate data.
 */
static void sp_256_map_sm2_8(sp_point_256* r, const sp_point_256* p,
    sp_digit* t)
{
    sp_digit* t1 = t;
    sp_digit* t2 = t + 2*8;
    sp_int32 n;

    sp_256_mont_inv_sm2_8(t1, p->z, t + 2*8);

    sp_256_mont_sqr_sm2_8(t2, t1, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_mul_sm2_8(t1, t2, t1, p256_sm2_mod, p256_sm2_mp_mod);

    /* x /= z^2 */
    sp_256_mont_mul_sm2_8(r->x, p->x, t2, p256_sm2_mod, p256_sm2_mp_mod);
    XMEMSET(r->x + 8, 0, sizeof(sp_digit) * 8U);
    sp_256_mont_reduce_sm2_8(r->x, p256_sm2_mod, p256_sm2_mp_mod);
    /* Reduce x to less than modulus */
    n = sp_256_cmp_sm2_8(r->x, p256_sm2_mod);
    sp_256_cond_sub_sm2_8(r->x, r->x, p256_sm2_mod, (sp_digit)~(n >> 31));
    sp_256_norm_8(r->x);

    /* y /= z^3 */
    sp_256_mont_mul_sm2_8(r->y, p->y, t1, p256_sm2_mod, p256_sm2_mp_mod);
    XMEMSET(r->y + 8, 0, sizeof(sp_digit) * 8U);
    sp_256_mont_reduce_sm2_8(r->y, p256_sm2_mod, p256_sm2_mp_mod);
    /* Reduce y to less than modulus */
    n = sp_256_cmp_sm2_8(r->y, p256_sm2_mod);
    sp_256_cond_sub_sm2_8(r->y, r->y, p256_sm2_mod, (sp_digit)~(n >> 31));
    sp_256_norm_8(r->y);

    XMEMSET(r->z, 0, sizeof(r->z) / 2);
    r->z[0] = 1;
}

/* Add two Montgomery form numbers (r = a + b % m).
 *
 * r   Result of addition.
 * a   First number to add in Montgomery form.
 * b   Second number to add in Montgomery form.
 * m   Modulus (prime).
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static void sp_256_mont_add_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p, const sp_digit* m_p)
#else
SP_NOINLINE static void sp_256_mont_add_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b, const sp_digit* m)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "MOV	lr, #0x0\n\t"
        "LDM	%[a], {r5, r6, r7, r8, r9, r10, r11, r12}\n\t"
        "LDM	%[b]!, {r3, r4}\n\t"
        "ADDS	r5, r5, r3\n\t"
        "ADCS	r6, r6, r4\n\t"
        "LDM	%[b]!, {r3, r4}\n\t"
        "ADCS	r7, r7, r3\n\t"
        "ADCS	r8, r8, r4\n\t"
        "LDM	%[b]!, {r3, r4}\n\t"
        "ADCS	r9, r9, r3\n\t"
        "ADCS	r10, r10, r4\n\t"
        "LDM	%[b]!, {r3, r4}\n\t"
        "ADCS	r11, r11, r3\n\t"
        "ADCS	r12, r12, r4\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "RSB	lr, lr, #0x0\n\t"
        "SUBS	r5, r5, lr\n\t"
        "SBCS	r6, r6, lr\n\t"
        "SBCS	r7, r7, #0x0\n\t"
        "SBCS	r8, r8, lr\n\t"
        "SBCS	r9, r9, lr\n\t"
        "SBCS	r10, r10, lr\n\t"
        "SBCS	r11, r11, lr\n\t"
        "SBCS	r12, r12, lr, LSL #1\n\t"
        "SBC	%[b], %[b], %[b]\n\t"
        "SUB	lr, lr, %[b]\n\t"
        "SUBS	r5, r5, lr\n\t"
        "SBCS	r6, r6, lr\n\t"
        "SBCS	r7, r7, #0x0\n\t"
        "SBCS	r8, r8, lr\n\t"
        "SBCS	r9, r9, lr\n\t"
        "SBCS	r10, r10, lr\n\t"
        "SBCS	r11, r11, lr\n\t"
        "SBC	r12, r12, lr, LSL #1\n\t"
        "STM	%[r], {r5, r6, r7, r8, r9, r10, r11, r12}\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "lr", "cc"
    );
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)m_p;
#else
    (void)m;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
}

/* Double a Montgomery form number (r = a + a % m).
 *
 * r   Result of doubling.
 * a   Number to double in Montgomery form.
 * m   Modulus (prime).
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static void sp_256_mont_dbl_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* m_p)
#else
SP_NOINLINE static void sp_256_mont_dbl_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* m)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "MOV	r2, #0x0\n\t"
        "LDM	%[a], {r4, r5, r6, r7, r8, r9, r10, r11}\n\t"
        "ADDS	r4, r4, r4\n\t"
        "ADCS	r5, r5, r5\n\t"
        "ADCS	r6, r6, r6\n\t"
        "ADCS	r7, r7, r7\n\t"
        "ADCS	r8, r8, r8\n\t"
        "ADCS	r9, r9, r9\n\t"
        "ADCS	r10, r10, r10\n\t"
        "ADCS	r11, r11, r11\n\t"
        "ADC	r2, r2, #0x0\n\t"
        "RSB	r2, r2, #0x0\n\t"
        "SUBS	r4, r4, r2\n\t"
        "SBCS	r5, r5, r2\n\t"
        "SBCS	r6, r6, #0x0\n\t"
        "SBCS	r7, r7, r2\n\t"
        "SBCS	r8, r8, r2\n\t"
        "SBCS	r9, r9, r2\n\t"
        "SBCS	r10, r10, r2\n\t"
        "SBCS	r11, r11, r2, LSL #1\n\t"
        "SBC	%[a], %[a], %[a]\n\t"
        "SUB	r2, r2, %[a]\n\t"
        "SUBS	r4, r4, r2\n\t"
        "SBCS	r5, r5, r2\n\t"
        "SBCS	r6, r6, #0x0\n\t"
        "SBCS	r7, r7, r2\n\t"
        "SBCS	r8, r8, r2\n\t"
        "SBCS	r9, r9, r2\n\t"
        "SBCS	r10, r10, r2\n\t"
        "SBC	r11, r11, r2, LSL #1\n\t"
        "STM	%[r], {r4, r5, r6, r7, r8, r9, r10, r11}\n\t"
        : [r] "+r" (r), [a] "+r" (a)
        :
        : "memory", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r2", "cc"
    );
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)m_p;
#else
    (void)m;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
}

/* Triple a Montgomery form number (r = a + a + a % m).
 *
 * r   Result of Tripling.
 * a   Number to triple in Montgomery form.
 * m   Modulus (prime).
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static void sp_256_mont_tpl_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* m_p)
#else
SP_NOINLINE static void sp_256_mont_tpl_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* m)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "MOV	r12, #0x0\n\t"
        "LDM	%[a], {r4, r5, r6, r7, r8, r9, r10, r11}\n\t"
        "ADDS	r4, r4, r4\n\t"
        "ADCS	r5, r5, r5\n\t"
        "ADCS	r6, r6, r6\n\t"
        "ADCS	r7, r7, r7\n\t"
        "ADCS	r8, r8, r8\n\t"
        "ADCS	r9, r9, r9\n\t"
        "ADCS	r10, r10, r10\n\t"
        "ADCS	r11, r11, r11\n\t"
        "ADC	r12, r12, #0x0\n\t"
        "RSB	r12, r12, #0x0\n\t"
        "SUBS	r4, r4, r12\n\t"
        "SBCS	r5, r5, r12\n\t"
        "SBCS	r6, r6, #0x0\n\t"
        "SBCS	r7, r7, r12\n\t"
        "SBCS	r8, r8, r12\n\t"
        "SBCS	r9, r9, r12\n\t"
        "SBCS	r10, r10, r12\n\t"
        "SBCS	r11, r11, r12, LSL #1\n\t"
        "SBC	r2, r2, r2\n\t"
        "SUB	r12, r12, r2\n\t"
        "SUBS	r4, r4, r12\n\t"
        "SBCS	r5, r5, r12\n\t"
        "SBCS	r6, r6, #0x0\n\t"
        "SBCS	r7, r7, r12\n\t"
        "SBCS	r8, r8, r12\n\t"
        "SBCS	r9, r9, r12\n\t"
        "SBCS	r10, r10, r12\n\t"
        "SBC	r11, r11, r12, LSL #1\n\t"
        "LDM	%[a]!, {r2, r3}\n\t"
        "ADDS	r4, r4, r2\n\t"
        "ADCS	r5, r5, r3\n\t"
        "LDM	%[a]!, {r2, r3}\n\t"
        "ADCS	r6, r6, r2\n\t"
        "ADCS	r7, r7, r3\n\t"
        "LDM	%[a]!, {r2, r3}\n\t"
        "ADCS	r8, r8, r2\n\t"
        "ADCS	r9, r9, r3\n\t"
        "LDM	%[a]!, {r2, r3}\n\t"
        "ADCS	r10, r10, r2\n\t"
        "ADCS	r11, r11, r3\n\t"
        "ADC	r12, r12, #0x0\n\t"
        "RSB	r12, r12, #0x0\n\t"
        "SUBS	r4, r4, r12\n\t"
        "SBCS	r5, r5, r12\n\t"
        "SBCS	r6, r6, #0x0\n\t"
        "SBCS	r7, r7, r12\n\t"
        "SBCS	r8, r8, r12\n\t"
        "SBCS	r9, r9, r12\n\t"
        "SBCS	r10, r10, r12\n\t"
        "SBCS	r11, r11, r12, LSL #1\n\t"
        "SBC	r2, r2, r2\n\t"
        "SUB	r12, r12, r2\n\t"
        "SUBS	r4, r4, r12\n\t"
        "SBCS	r5, r5, r12\n\t"
        "SBCS	r6, r6, #0x0\n\t"
        "SBCS	r7, r7, r12\n\t"
        "SBCS	r8, r8, r12\n\t"
        "SBCS	r9, r9, r12\n\t"
        "SBCS	r10, r10, r12\n\t"
        "SBC	r11, r11, r12, LSL #1\n\t"
        "STM	%[r], {r4, r5, r6, r7, r8, r9, r10, r11}\n\t"
        : [r] "+r" (r), [a] "+r" (a)
        :
        : "memory", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r2", "r3", "r12", "cc"
    );
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)m_p;
#else
    (void)m;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
}

/* Subtract two Montgomery form numbers (r = a - b % m).
 *
 * r   Result of subtration.
 * a   Number to subtract from in Montgomery form.
 * b   Number to subtract with in Montgomery form.
 * m   Modulus (prime).
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
SP_NOINLINE static void sp_256_mont_sub_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p, const sp_digit* m_p)
#else
SP_NOINLINE static void sp_256_mont_sub_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b, const sp_digit* m)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "MOV	lr, #0x0\n\t"
        "LDM	%[a], {r5, r6, r7, r8, r9, r10, r11, r12}\n\t"
        "LDM	%[b]!, {r3, r4}\n\t"
        "SUBS	r5, r5, r3\n\t"
        "SBCS	r6, r6, r4\n\t"
        "LDM	%[b]!, {r3, r4}\n\t"
        "SBCS	r7, r7, r3\n\t"
        "SBCS	r8, r8, r4\n\t"
        "LDM	%[b]!, {r3, r4}\n\t"
        "SBCS	r9, r9, r3\n\t"
        "SBCS	r10, r10, r4\n\t"
        "LDM	%[b]!, {r3, r4}\n\t"
        "SBCS	r11, r11, r3\n\t"
        "SBCS	r12, r12, r4\n\t"
        "SBC	lr, lr, #0x0\n\t"
        "ADDS	r5, r5, lr\n\t"
        "ADCS	r6, r6, lr\n\t"
        "ADCS	r7, r7, #0x0\n\t"
        "ADCS	r8, r8, lr\n\t"
        "ADCS	r9, r9, lr\n\t"
        "ADCS	r10, r10, lr\n\t"
        "ADCS	r11, r11, lr\n\t"
        "ADCS	r12, r12, lr, LSL #1\n\t"
        "ADC	lr, lr, #0x0\n\t"
        "ADDS	r5, r5, lr\n\t"
        "ADCS	r6, r6, lr\n\t"
        "ADCS	r7, r7, #0x0\n\t"
        "ADCS	r8, r8, lr\n\t"
        "ADCS	r9, r9, lr\n\t"
        "ADCS	r10, r10, lr\n\t"
        "ADCS	r11, r11, lr\n\t"
        "ADC	r12, r12, lr, LSL #1\n\t"
        "STM	%[r], {r5, r6, r7, r8, r9, r10, r11, r12}\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "lr", "cc"
    );
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    (void)m_p;
#else
    (void)m;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
}

/* Divide the number by 2 mod the modulus (prime). (r = a / 2 % m)
 *
 * r  Result of division by 2.
 * a  Number to divide.
 * m  Modulus (prime).
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static void sp_256_mont_div2_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* m_p)
#else
static void sp_256_mont_div2_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* m)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* m __asm__ ("r2") = (const sp_digit*)m_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "LDM	%[a], {r4, r5, r6, r7}\n\t"
        "AND	r3, r4, #0x1\n\t"
        "RSB	r8, r3, #0x0\n\t"
        "ADDS	r4, r4, r8\n\t"
        "ADCS	r5, r5, r8\n\t"
        "ADCS	r6, r6, #0x0\n\t"
        "ADCS	r7, r7, r8\n\t"
        "STM	%[r], {r4, r5, r6, r7}\n\t"
        "LDRD	r4, r5, [%[a], #16]\n\t"
        "LDRD	r6, r7, [%[a], #24]\n\t"
        "ADCS	r4, r4, r8\n\t"
        "ADCS	r5, r5, r8\n\t"
        "ADCS	r6, r6, r8\n\t"
        "ADCS	r7, r7, r8, LSL #1\n\t"
        "MOV	r3, #0x0\n\t"
        "ADC	r3, r3, #0x0\n\t"
        "LSR	r8, r4, #1\n\t"
        "LSR	r9, r5, #1\n\t"
        "LSR	r10, r6, #1\n\t"
        "LSR	r11, r7, #1\n\t"
        "ORR	r8, r8, r5, LSL #31\n\t"
        "ORR	r9, r9, r6, LSL #31\n\t"
        "ORR	r10, r10, r7, LSL #31\n\t"
        "ORR	r11, r11, r3, LSL #31\n\t"
        "MOV	r3, r4\n\t"
        "STRD	r8, r9, [%[r], #16]\n\t"
        "STRD	r10, r11, [%[r], #24]\n\t"
        "LDM	%[r], {r4, r5, r6, r7}\n\t"
        "LSR	r8, r4, #1\n\t"
        "LSR	r9, r5, #1\n\t"
        "LSR	r10, r6, #1\n\t"
        "LSR	r11, r7, #1\n\t"
        "ORR	r8, r8, r5, LSL #31\n\t"
        "ORR	r9, r9, r6, LSL #31\n\t"
        "ORR	r10, r10, r7, LSL #31\n\t"
        "ORR	r11, r11, r3, LSL #31\n\t"
        "STM	%[r], {r8, r9, r10, r11}\n\t"
        : [r] "+r" (r), [a] "+r" (a), [m] "+r" (m)
        :
        : "memory", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r3", "cc"
    );
}

/* Double the Montgomery form projective point p.
 *
 * r  Result of doubling point.
 * p  Point to double.
 * t  Temporary ordinate data.
 */
static void sp_256_proj_point_dbl_sm2_8(sp_point_256* r, const sp_point_256* p,
    sp_digit* t)
{
    sp_digit* t1 = t;
    sp_digit* t2 = t + 2*8;
    sp_digit* x;
    sp_digit* y;
    sp_digit* z;

    x = r->x;
    y = r->y;
    z = r->z;
    /* Put infinity into result. */
    if (r != p) {
        r->infinity = p->infinity;
    }

    /* T1 = Z * Z */
    sp_256_mont_sqr_sm2_8(t1, p->z, p256_sm2_mod, p256_sm2_mp_mod);
    /* Z = Y * Z */
    sp_256_mont_mul_sm2_8(z, p->y, p->z, p256_sm2_mod, p256_sm2_mp_mod);
    /* Z = 2Z */
    sp_256_mont_dbl_sm2_8(z, z, p256_sm2_mod);
    /* T2 = X - T1 */
    sp_256_mont_sub_sm2_8(t2, p->x, t1, p256_sm2_mod);
    /* T1 = X + T1 */
    sp_256_mont_add_sm2_8(t1, p->x, t1, p256_sm2_mod);
    /* T2 = T1 * T2 */
    sp_256_mont_mul_sm2_8(t2, t1, t2, p256_sm2_mod, p256_sm2_mp_mod);
    /* T1 = 3T2 */
    sp_256_mont_tpl_sm2_8(t1, t2, p256_sm2_mod);
    /* Y = 2Y */
    sp_256_mont_dbl_sm2_8(y, p->y, p256_sm2_mod);
    /* Y = Y * Y */
    sp_256_mont_sqr_sm2_8(y, y, p256_sm2_mod, p256_sm2_mp_mod);
    /* T2 = Y * Y */
    sp_256_mont_sqr_sm2_8(t2, y, p256_sm2_mod, p256_sm2_mp_mod);
    /* T2 = T2/2 */
    sp_256_mont_div2_sm2_8(t2, t2, p256_sm2_mod);
    /* Y = Y * X */
    sp_256_mont_mul_sm2_8(y, y, p->x, p256_sm2_mod, p256_sm2_mp_mod);
    /* X = T1 * T1 */
    sp_256_mont_sqr_sm2_8(x, t1, p256_sm2_mod, p256_sm2_mp_mod);
    /* X = X - Y */
    sp_256_mont_sub_sm2_8(x, x, y, p256_sm2_mod);
    /* X = X - Y */
    sp_256_mont_sub_sm2_8(x, x, y, p256_sm2_mod);
    /* Y = Y - X */
    sp_256_mont_sub_sm2_8(y, y, x, p256_sm2_mod);
    /* Y = Y * T1 */
    sp_256_mont_mul_sm2_8(y, y, t1, p256_sm2_mod, p256_sm2_mp_mod);
    /* Y = Y - T2 */
    sp_256_mont_sub_sm2_8(y, y, t2, p256_sm2_mod);
}

#ifdef WOLFSSL_SP_NONBLOCK
typedef struct sp_256_proj_point_dbl_8_ctx {
    int state;
    sp_digit* t1;
    sp_digit* t2;
    sp_digit* x;
    sp_digit* y;
    sp_digit* z;
} sp_256_proj_point_dbl_8_ctx;

/* Double the Montgomery form projective point p.
 *
 * r  Result of doubling point.
 * p  Point to double.
 * t  Temporary ordinate data.
 */
static int sp_256_proj_point_dbl_sm2_8_nb(sp_ecc_ctx_t* sp_ctx, sp_point_256* r,
        const sp_point_256* p, sp_digit* t)
{
    int err = FP_WOULDBLOCK;
    sp_256_proj_point_dbl_8_ctx* ctx = (sp_256_proj_point_dbl_sm2_8_ctx*)sp_ctx->data;

    typedef char ctx_size_test[sizeof(sp_256_proj_point_dbl_8_ctx) >= sizeof(*sp_ctx) ? -1 : 1];
    (void)sizeof(ctx_size_test);

    switch (ctx->state) {
    case 0:
        ctx->t1 = t;
        ctx->t2 = t + 2*8;
        ctx->x = r->x;
        ctx->y = r->y;
        ctx->z = r->z;

        /* Put infinity into result. */
        if (r != p) {
            r->infinity = p->infinity;
        }
        ctx->state = 1;
        break;
    case 1:
        /* T1 = Z * Z */
        sp_256_mont_sqr_sm2_8(ctx->t1, p->z, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 2;
        break;
    case 2:
        /* Z = Y * Z */
        sp_256_mont_mul_sm2_8(ctx->z, p->y, p->z, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 3;
        break;
    case 3:
        /* Z = 2Z */
        sp_256_mont_dbl_sm2_8(ctx->z, ctx->z, p256_sm2_mod);
        ctx->state = 4;
        break;
    case 4:
        /* T2 = X - T1 */
        sp_256_mont_sub_sm2_8(ctx->t2, p->x, ctx->t1, p256_sm2_mod);
        ctx->state = 5;
        break;
    case 5:
        /* T1 = X + T1 */
        sp_256_mont_add_sm2_8(ctx->t1, p->x, ctx->t1, p256_sm2_mod);
        ctx->state = 6;
        break;
    case 6:
        /* T2 = T1 * T2 */
        sp_256_mont_mul_sm2_8(ctx->t2, ctx->t1, ctx->t2, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 7;
        break;
    case 7:
        /* T1 = 3T2 */
        sp_256_mont_tpl_sm2_8(ctx->t1, ctx->t2, p256_sm2_mod);
        ctx->state = 8;
        break;
    case 8:
        /* Y = 2Y */
        sp_256_mont_dbl_sm2_8(ctx->y, p->y, p256_sm2_mod);
        ctx->state = 9;
        break;
    case 9:
        /* Y = Y * Y */
        sp_256_mont_sqr_sm2_8(ctx->y, ctx->y, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 10;
        break;
    case 10:
        /* T2 = Y * Y */
        sp_256_mont_sqr_sm2_8(ctx->t2, ctx->y, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 11;
        break;
    case 11:
        /* T2 = T2/2 */
        sp_256_mont_div2_sm2_8(ctx->t2, ctx->t2, p256_sm2_mod);
        ctx->state = 12;
        break;
    case 12:
        /* Y = Y * X */
        sp_256_mont_mul_sm2_8(ctx->y, ctx->y, p->x, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 13;
        break;
    case 13:
        /* X = T1 * T1 */
        sp_256_mont_sqr_sm2_8(ctx->x, ctx->t1, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 14;
        break;
    case 14:
        /* X = X - Y */
        sp_256_mont_sub_sm2_8(ctx->x, ctx->x, ctx->y, p256_sm2_mod);
        ctx->state = 15;
        break;
    case 15:
        /* X = X - Y */
        sp_256_mont_sub_sm2_8(ctx->x, ctx->x, ctx->y, p256_sm2_mod);
        ctx->state = 16;
        break;
    case 16:
        /* Y = Y - X */
        sp_256_mont_sub_sm2_8(ctx->y, ctx->y, ctx->x, p256_sm2_mod);
        ctx->state = 17;
        break;
    case 17:
        /* Y = Y * T1 */
        sp_256_mont_mul_sm2_8(ctx->y, ctx->y, ctx->t1, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 18;
        break;
    case 18:
        /* Y = Y - T2 */
        sp_256_mont_sub_sm2_8(ctx->y, ctx->y, ctx->t2, p256_sm2_mod);
        ctx->state = 19;
        /* fall-through */
    case 19:
        err = MP_OKAY;
        break;
    }

    if (err == MP_OKAY && ctx->state != 19) {
        err = FP_WOULDBLOCK;
    }

    return err;
}
#endif /* WOLFSSL_SP_NONBLOCK */
/* Compare two numbers to determine if they are equal.
 * Constant time implementation.
 *
 * a  First number to compare.
 * b  Second number to compare.
 * returns 1 when equal and 0 otherwise.
 */
static int sp_256_cmp_equal_8(const sp_digit* a, const sp_digit* b)
{
    return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) |
            (a[3] ^ b[3]) | (a[4] ^ b[4]) | (a[5] ^ b[5]) |
            (a[6] ^ b[6]) | (a[7] ^ b[7])) == 0;
}

/* Returns 1 if the number of zero.
 * Implementation is constant time.
 *
 * a  Number to check.
 * returns 1 if the number is zero and 0 otherwise.
 */
static int sp_256_iszero_8(const sp_digit* a)
{
    return (a[0] | a[1] | a[2] | a[3] | a[4] | a[5] | a[6] | a[7]) == 0;
}


/* Add two Montgomery form projective points.
 *
 * r  Result of addition.
 * p  First point to add.
 * q  Second point to add.
 * t  Temporary ordinate data.
 */
static void sp_256_proj_point_add_sm2_8(sp_point_256* r,
        const sp_point_256* p, const sp_point_256* q, sp_digit* t)
{
    sp_digit* t6 = t;
    sp_digit* t1 = t + 2*8;
    sp_digit* t2 = t + 4*8;
    sp_digit* t3 = t + 6*8;
    sp_digit* t4 = t + 8*8;
    sp_digit* t5 = t + 10*8;

    /* U1 = X1*Z2^2 */
    sp_256_mont_sqr_sm2_8(t1, q->z, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_mul_sm2_8(t3, t1, q->z, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_mul_sm2_8(t1, t1, p->x, p256_sm2_mod, p256_sm2_mp_mod);
    /* U2 = X2*Z1^2 */
    sp_256_mont_sqr_sm2_8(t2, p->z, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_mul_sm2_8(t4, t2, p->z, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_mul_sm2_8(t2, t2, q->x, p256_sm2_mod, p256_sm2_mp_mod);
    /* S1 = Y1*Z2^3 */
    sp_256_mont_mul_sm2_8(t3, t3, p->y, p256_sm2_mod, p256_sm2_mp_mod);
    /* S2 = Y2*Z1^3 */
    sp_256_mont_mul_sm2_8(t4, t4, q->y, p256_sm2_mod, p256_sm2_mp_mod);

    /* Check double */
    if ((~p->infinity) & (~q->infinity) &
            sp_256_cmp_equal_8(t2, t1) &
            sp_256_cmp_equal_8(t4, t3)) {
        sp_256_proj_point_dbl_sm2_8(r, p, t);
    }
    else {
        sp_digit* x = t6;
        sp_digit* y = t1;
        sp_digit* z = t2;

        /* H = U2 - U1 */
        sp_256_mont_sub_sm2_8(t2, t2, t1, p256_sm2_mod);
        /* R = S2 - S1 */
        sp_256_mont_sub_sm2_8(t4, t4, t3, p256_sm2_mod);
        /* X3 = R^2 - H^3 - 2*U1*H^2 */
        sp_256_mont_sqr_sm2_8(t5, t2, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_mul_sm2_8(y, t1, t5, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_mul_sm2_8(t5, t5, t2, p256_sm2_mod, p256_sm2_mp_mod);
        /* Z3 = H*Z1*Z2 */
        sp_256_mont_mul_sm2_8(z, p->z, t2, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_mul_sm2_8(z, z, q->z, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_sqr_sm2_8(x, t4, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_sub_sm2_8(x, x, t5, p256_sm2_mod);
        sp_256_mont_mul_sm2_8(t5, t5, t3, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_dbl_sm2_8(t3, y, p256_sm2_mod);
        sp_256_mont_sub_sm2_8(x, x, t3, p256_sm2_mod);
        /* Y3 = R*(U1*H^2 - X3) - S1*H^3 */
        sp_256_mont_sub_sm2_8(y, y, x, p256_sm2_mod);
        sp_256_mont_mul_sm2_8(y, y, t4, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_sub_sm2_8(y, y, t5, p256_sm2_mod);
        {
            int i;
            sp_digit maskp = (sp_digit)(0 - (q->infinity & (!p->infinity)));
            sp_digit maskq = (sp_digit)(0 - (p->infinity & (!q->infinity)));
            sp_digit maskt = ~(maskp | maskq);
            sp_digit inf = (sp_digit)(p->infinity & q->infinity);

            for (i = 0; i < 8; i++) {
                r->x[i] = (p->x[i] & maskp) | (q->x[i] & maskq) |
                          (x[i] & maskt);
            }
            for (i = 0; i < 8; i++) {
                r->y[i] = (p->y[i] & maskp) | (q->y[i] & maskq) |
                          (y[i] & maskt);
            }
            for (i = 0; i < 8; i++) {
                r->z[i] = (p->z[i] & maskp) | (q->z[i] & maskq) |
                          (z[i] & maskt);
            }
            r->z[0] |= inf;
            r->infinity = (int)inf;
        }
    }
}

#ifdef WOLFSSL_SP_NONBLOCK
typedef struct sp_256_proj_point_add_8_ctx {
    int state;
    sp_256_proj_point_dbl_8_ctx dbl_ctx;
    const sp_point_256* ap[2];
    sp_point_256* rp[2];
    sp_digit* t1;
    sp_digit* t2;
    sp_digit* t3;
    sp_digit* t4;
    sp_digit* t5;
    sp_digit* t6;
    sp_digit* x;
    sp_digit* y;
    sp_digit* z;
} sp_256_proj_point_add_8_ctx;

/* Add two Montgomery form projective points.
 *
 * r  Result of addition.
 * p  First point to add.
 * q  Second point to add.
 * t  Temporary ordinate data.
 */
static int sp_256_proj_point_add_sm2_8_nb(sp_ecc_ctx_t* sp_ctx, sp_point_256* r,
    const sp_point_256* p, const sp_point_256* q, sp_digit* t)
{
    int err = FP_WOULDBLOCK;
    sp_256_proj_point_add_8_ctx* ctx = (sp_256_proj_point_add_sm2_8_ctx*)sp_ctx->data;

    /* Ensure only the first point is the same as the result. */
    if (q == r) {
        const sp_point_256* a = p;
        p = q;
        q = a;
    }

    typedef char ctx_size_test[sizeof(sp_256_proj_point_add_8_ctx) >= sizeof(*sp_ctx) ? -1 : 1];
    (void)sizeof(ctx_size_test);

    switch (ctx->state) {
    case 0: /* INIT */
        ctx->t6 = t;
        ctx->t1 = t + 2*8;
        ctx->t2 = t + 4*8;
        ctx->t3 = t + 6*8;
        ctx->t4 = t + 8*8;
        ctx->t5 = t + 10*8;
        ctx->x = ctx->t6;
        ctx->y = ctx->t1;
        ctx->z = ctx->t2;

        ctx->state = 1;
        break;
    case 1:
        /* U1 = X1*Z2^2 */
        sp_256_mont_sqr_sm2_8(ctx->t1, q->z, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 2;
        break;
    case 2:
        sp_256_mont_mul_sm2_8(ctx->t3, ctx->t1, q->z, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 3;
        break;
    case 3:
        sp_256_mont_mul_sm2_8(ctx->t1, ctx->t1, p->x, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 4;
        break;
    case 4:
        /* U2 = X2*Z1^2 */
        sp_256_mont_sqr_sm2_8(ctx->t2, p->z, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 5;
        break;
    case 5:
        sp_256_mont_mul_sm2_8(ctx->t4, ctx->t2, p->z, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 6;
        break;
    case 6:
        sp_256_mont_mul_sm2_8(ctx->t2, ctx->t2, q->x, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 7;
        break;
    case 7:
        /* S1 = Y1*Z2^3 */
        sp_256_mont_mul_sm2_8(ctx->t3, ctx->t3, p->y, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 8;
        break;
    case 8:
        /* S2 = Y2*Z1^3 */
        sp_256_mont_mul_sm2_8(ctx->t4, ctx->t4, q->y, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 9;
        break;
    case 9:
        /* Check double */
        if ((~p->infinity) & (~q->infinity) &
                sp_256_cmp_equal_8(ctx->t2, ctx->t1) &
                sp_256_cmp_equal_8(ctx->t4, ctx->t3)) {
            XMEMSET(&ctx->dbl_ctx, 0, sizeof(ctx->dbl_ctx));
            sp_256_proj_point_dbl_sm2_8(r, p, t);
            ctx->state = 25;
        }
        else {
            ctx->state = 10;
        }
        break;
    case 10:
        /* H = U2 - U1 */
        sp_256_mont_sub_sm2_8(ctx->t2, ctx->t2, ctx->t1, p256_sm2_mod);
        ctx->state = 11;
        break;
    case 11:
        /* R = S2 - S1 */
        sp_256_mont_sub_sm2_8(ctx->t4, ctx->t4, ctx->t3, p256_sm2_mod);
        ctx->state = 12;
        break;
    case 12:
        /* X3 = R^2 - H^3 - 2*U1*H^2 */
        sp_256_mont_sqr_sm2_8(ctx->t5, ctx->t2, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 13;
        break;
    case 13:
        sp_256_mont_mul_sm2_8(ctx->y, ctx->t1, ctx->t5, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 14;
        break;
    case 14:
        sp_256_mont_mul_sm2_8(ctx->t5, ctx->t5, ctx->t2, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 15;
        break;
    case 15:
        /* Z3 = H*Z1*Z2 */
        sp_256_mont_mul_sm2_8(ctx->z, p->z, ctx->t2, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 16;
        break;
    case 16:
        sp_256_mont_mul_sm2_8(ctx->z, ctx->z, q->z, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 17;
        break;
    case 17:
        sp_256_mont_sqr_sm2_8(ctx->x, ctx->t4, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 18;
        break;
    case 18:
        sp_256_mont_sub_sm2_8(ctx->x, ctx->x, ctx->t5, p256_sm2_mod);
        ctx->state = 19;
        break;
    case 19:
        sp_256_mont_mul_sm2_8(ctx->t5, ctx->t5, ctx->t3, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 20;
        break;
    case 20:
        sp_256_mont_dbl_sm2_8(ctx->t3, ctx->y, p256_sm2_mod);
        sp_256_mont_sub_sm2_8(ctx->x, ctx->x, ctx->t3, p256_sm2_mod);
        ctx->state = 21;
        break;
    case 21:
        /* Y3 = R*(U1*H^2 - X3) - S1*H^3 */
        sp_256_mont_sub_sm2_8(ctx->y, ctx->y, ctx->x, p256_sm2_mod);
        ctx->state = 22;
        break;
    case 22:
        sp_256_mont_mul_sm2_8(ctx->y, ctx->y, ctx->t4, p256_sm2_mod, p256_sm2_mp_mod);
        ctx->state = 23;
        break;
    case 23:
        sp_256_mont_sub_sm2_8(ctx->y, ctx->y, ctx->t5, p256_sm2_mod);
        ctx->state = 24;
        break;
    case 24:
    {
        {
            int i;
            sp_digit maskp = (sp_digit)(0 - (q->infinity & (!p->infinity)));
            sp_digit maskq = (sp_digit)(0 - (p->infinity & (!q->infinity)));
            sp_digit maskt = ~(maskp | maskq);
            sp_digit inf = (sp_digit)(p->infinity & q->infinity);

            for (i = 0; i < 8; i++) {
                r->x[i] = (p->x[i] & maskp) | (q->x[i] & maskq) |
                          (ctx->x[i] & maskt);
            }
            for (i = 0; i < 8; i++) {
                r->y[i] = (p->y[i] & maskp) | (q->y[i] & maskq) |
                          (ctx->y[i] & maskt);
            }
            for (i = 0; i < 8; i++) {
                r->z[i] = (p->z[i] & maskp) | (q->z[i] & maskq) |
                          (ctx->z[i] & maskt);
            }
            r->z[0] |= inf;
            r->infinity = (int)inf;
        }
        ctx->state = 25;
        break;
    }
    case 25:
        err = MP_OKAY;
        break;
    }

    if (err == MP_OKAY && ctx->state != 25) {
        err = FP_WOULDBLOCK;
    }
    return err;
}
#endif /* WOLFSSL_SP_NONBLOCK */

#ifndef WC_NO_CACHE_RESISTANT
/* Touch each possible point that could be being copied.
 *
 * r      Point to copy into.
 * table  Table - start of the entries to access
 * idx    Index of entry to retrieve.
 */
static void sp_256_get_point_16_sm2_8(sp_point_256* r, const sp_point_256* table,
    int idx)
{
    int i;
    sp_digit mask;

    r->x[0] = 0;
    r->x[1] = 0;
    r->x[2] = 0;
    r->x[3] = 0;
    r->x[4] = 0;
    r->x[5] = 0;
    r->x[6] = 0;
    r->x[7] = 0;
    r->y[0] = 0;
    r->y[1] = 0;
    r->y[2] = 0;
    r->y[3] = 0;
    r->y[4] = 0;
    r->y[5] = 0;
    r->y[6] = 0;
    r->y[7] = 0;
    r->z[0] = 0;
    r->z[1] = 0;
    r->z[2] = 0;
    r->z[3] = 0;
    r->z[4] = 0;
    r->z[5] = 0;
    r->z[6] = 0;
    r->z[7] = 0;
    for (i = 1; i < 16; i++) {
        mask = (sp_digit)0 - (i == idx);
        r->x[0] |= mask & table[i].x[0];
        r->x[1] |= mask & table[i].x[1];
        r->x[2] |= mask & table[i].x[2];
        r->x[3] |= mask & table[i].x[3];
        r->x[4] |= mask & table[i].x[4];
        r->x[5] |= mask & table[i].x[5];
        r->x[6] |= mask & table[i].x[6];
        r->x[7] |= mask & table[i].x[7];
        r->y[0] |= mask & table[i].y[0];
        r->y[1] |= mask & table[i].y[1];
        r->y[2] |= mask & table[i].y[2];
        r->y[3] |= mask & table[i].y[3];
        r->y[4] |= mask & table[i].y[4];
        r->y[5] |= mask & table[i].y[5];
        r->y[6] |= mask & table[i].y[6];
        r->y[7] |= mask & table[i].y[7];
        r->z[0] |= mask & table[i].z[0];
        r->z[1] |= mask & table[i].z[1];
        r->z[2] |= mask & table[i].z[2];
        r->z[3] |= mask & table[i].z[3];
        r->z[4] |= mask & table[i].z[4];
        r->z[5] |= mask & table[i].z[5];
        r->z[6] |= mask & table[i].z[6];
        r->z[7] |= mask & table[i].z[7];
    }
}
#endif /* !WC_NO_CACHE_RESISTANT */
/* Multiply the point by the scalar and return the result.
 * If map is true then convert result to affine coordinates.
 *
 * Fast implementation that generates a pre-computation table.
 * 4 bits of window (no sliding!).
 * Uses add and double for calculating table.
 * 256 doubles.
 * 76 adds.
 *
 * r     Resulting point.
 * g     Point to multiply.
 * k     Scalar to multiply by.
 * map   Indicates whether to convert result to affine.
 * ct    Constant time required.
 * heap  Heap to use for allocation.
 * returns MEMORY_E when memory allocation fails and MP_OKAY on success.
 */
static int sp_256_ecc_mulmod_fast_sm2_8(sp_point_256* r, const sp_point_256* g, const sp_digit* k,
        int map, int ct, void* heap)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_point_256* t = NULL;
    sp_digit* tmp = NULL;
#else
    sp_point_256 t[16 + 1];
    sp_digit tmp[2 * 8 * 6];
#endif
    sp_point_256* rt = NULL;
#ifndef WC_NO_CACHE_RESISTANT
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_point_256* p = NULL;
#else
    sp_point_256 p[1];
#endif
#endif /* !WC_NO_CACHE_RESISTANT */
    sp_digit n;
    int i;
    int c;
    int y;
    int err = MP_OKAY;

    /* Constant time used for cache attack resistance implementation. */
    (void)ct;
    (void)heap;

#ifdef WOLFSSL_SP_SMALL_STACK
    t = (sp_point_256*)XMALLOC(sizeof(sp_point_256) * (16 + 1),
        heap, DYNAMIC_TYPE_ECC);
    if (t == NULL)
        err = MEMORY_E;
    #ifndef WC_NO_CACHE_RESISTANT
    if (err == MP_OKAY) {
        p = (sp_point_256*)XMALLOC(sizeof(sp_point_256),
            heap, DYNAMIC_TYPE_ECC);
        if (p == NULL)
            err = MEMORY_E;
    }
    #endif
    if (err == MP_OKAY) {
        tmp = (sp_digit*)XMALLOC(sizeof(sp_digit) * 2 * 8 * 6, heap,
                                DYNAMIC_TYPE_ECC);
        if (tmp == NULL)
            err = MEMORY_E;
    }
#endif

    if (err == MP_OKAY) {
        rt = t + 16;

        /* t[0] = {0, 0, 1} * norm */
        XMEMSET(&t[0], 0, sizeof(t[0]));
        t[0].infinity = 1;
        /* t[1] = {g->x, g->y, g->z} * norm */
        (void)sp_256_mod_mul_norm_sm2_8(t[1].x, g->x, p256_sm2_mod);
        (void)sp_256_mod_mul_norm_sm2_8(t[1].y, g->y, p256_sm2_mod);
        (void)sp_256_mod_mul_norm_sm2_8(t[1].z, g->z, p256_sm2_mod);
        t[1].infinity = 0;
        sp_256_proj_point_dbl_sm2_8(&t[ 2], &t[ 1], tmp);
        t[ 2].infinity = 0;
        sp_256_proj_point_add_sm2_8(&t[ 3], &t[ 2], &t[ 1], tmp);
        t[ 3].infinity = 0;
        sp_256_proj_point_dbl_sm2_8(&t[ 4], &t[ 2], tmp);
        t[ 4].infinity = 0;
        sp_256_proj_point_add_sm2_8(&t[ 5], &t[ 3], &t[ 2], tmp);
        t[ 5].infinity = 0;
        sp_256_proj_point_dbl_sm2_8(&t[ 6], &t[ 3], tmp);
        t[ 6].infinity = 0;
        sp_256_proj_point_add_sm2_8(&t[ 7], &t[ 4], &t[ 3], tmp);
        t[ 7].infinity = 0;
        sp_256_proj_point_dbl_sm2_8(&t[ 8], &t[ 4], tmp);
        t[ 8].infinity = 0;
        sp_256_proj_point_add_sm2_8(&t[ 9], &t[ 5], &t[ 4], tmp);
        t[ 9].infinity = 0;
        sp_256_proj_point_dbl_sm2_8(&t[10], &t[ 5], tmp);
        t[10].infinity = 0;
        sp_256_proj_point_add_sm2_8(&t[11], &t[ 6], &t[ 5], tmp);
        t[11].infinity = 0;
        sp_256_proj_point_dbl_sm2_8(&t[12], &t[ 6], tmp);
        t[12].infinity = 0;
        sp_256_proj_point_add_sm2_8(&t[13], &t[ 7], &t[ 6], tmp);
        t[13].infinity = 0;
        sp_256_proj_point_dbl_sm2_8(&t[14], &t[ 7], tmp);
        t[14].infinity = 0;
        sp_256_proj_point_add_sm2_8(&t[15], &t[ 8], &t[ 7], tmp);
        t[15].infinity = 0;

        i = 6;
        n = k[i+1] << 0;
        c = 28;
        y = (int)(n >> 28);
    #ifndef WC_NO_CACHE_RESISTANT
        if (ct) {
            sp_256_get_point_16_sm2_8(rt, t, y);
            rt->infinity = !y;
        }
        else
    #endif
        {
            XMEMCPY(rt, &t[y], sizeof(sp_point_256));
        }
        n <<= 4;
        for (; i>=0 || c>=4; ) {
            if (c < 4) {
                n |= k[i--];
                c += 32;
            }
            y = (n >> 28) & 0xf;
            n <<= 4;
            c -= 4;

            sp_256_proj_point_dbl_sm2_8(rt, rt, tmp);
            sp_256_proj_point_dbl_sm2_8(rt, rt, tmp);
            sp_256_proj_point_dbl_sm2_8(rt, rt, tmp);
            sp_256_proj_point_dbl_sm2_8(rt, rt, tmp);

    #ifndef WC_NO_CACHE_RESISTANT
            if (ct) {
                sp_256_get_point_16_sm2_8(p, t, y);
                p->infinity = !y;
                sp_256_proj_point_add_sm2_8(rt, rt, p, tmp);
            }
            else
    #endif
            {
                sp_256_proj_point_add_sm2_8(rt, rt, &t[y], tmp);
            }
        }

        if (map != 0) {
            sp_256_map_sm2_8(r, rt, tmp);
        }
        else {
            XMEMCPY(r, rt, sizeof(sp_point_256));
        }
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    if (tmp != NULL)
#endif
    {
        ForceZero(tmp, sizeof(sp_digit) * 2 * 8 * 6);
    #ifdef WOLFSSL_SP_SMALL_STACK
        XFREE(tmp, heap, DYNAMIC_TYPE_ECC);
    #endif
    }
#ifndef WC_NO_CACHE_RESISTANT
#ifdef WOLFSSL_SP_SMALL_STACK
    if (p != NULL)
#endif
    {
        ForceZero(p, sizeof(sp_point_256));
    #ifdef WOLFSSL_SP_SMALL_STACK
        XFREE(p, heap, DYNAMIC_TYPE_ECC);
    #endif
    }
#endif /* !WC_NO_CACHE_RESISTANT */
#ifdef WOLFSSL_SP_SMALL_STACK
    if (t != NULL)
#endif
    {
        ForceZero(t, sizeof(sp_point_256) * 17);
    #ifdef WOLFSSL_SP_SMALL_STACK
        XFREE(t, heap, DYNAMIC_TYPE_ECC);
    #endif
    }

    return err;
}

#ifdef FP_ECC
/* Double the Montgomery form projective point p a number of times.
 *
 * r  Result of repeated doubling of point.
 * p  Point to double.
 * n  Number of times to double
 * t  Temporary ordinate data.
 */
static void sp_256_proj_point_dbl_n_sm2_8(sp_point_256* p, int i,
    sp_digit* t)
{
    sp_digit* w = t;
    sp_digit* a = t + 2*8;
    sp_digit* b = t + 4*8;
    sp_digit* t1 = t + 6*8;
    sp_digit* t2 = t + 8*8;
    sp_digit* x;
    sp_digit* y;
    sp_digit* z;
    volatile int n = i;

    x = p->x;
    y = p->y;
    z = p->z;

    /* Y = 2*Y */
    sp_256_mont_dbl_sm2_8(y, y, p256_sm2_mod);
    /* W = Z^4 */
    sp_256_mont_sqr_sm2_8(w, z, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_sqr_sm2_8(w, w, p256_sm2_mod, p256_sm2_mp_mod);
#ifndef WOLFSSL_SP_SMALL
    while (--n > 0)
#else
    while (--n >= 0)
#endif
    {
        /* A = 3*(X^2 - W) */
        sp_256_mont_sqr_sm2_8(t1, x, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_sub_sm2_8(t1, t1, w, p256_sm2_mod);
        sp_256_mont_tpl_sm2_8(a, t1, p256_sm2_mod);
        /* B = X*Y^2 */
        sp_256_mont_sqr_sm2_8(t1, y, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_mul_sm2_8(b, t1, x, p256_sm2_mod, p256_sm2_mp_mod);
        /* X = A^2 - 2B */
        sp_256_mont_sqr_sm2_8(x, a, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_dbl_sm2_8(t2, b, p256_sm2_mod);
        sp_256_mont_sub_sm2_8(x, x, t2, p256_sm2_mod);
        /* B = 2.(B - X) */
        sp_256_mont_sub_sm2_8(t2, b, x, p256_sm2_mod);
        sp_256_mont_dbl_sm2_8(b, t2, p256_sm2_mod);
        /* Z = Z*Y */
        sp_256_mont_mul_sm2_8(z, z, y, p256_sm2_mod, p256_sm2_mp_mod);
        /* t1 = Y^4 */
        sp_256_mont_sqr_sm2_8(t1, t1, p256_sm2_mod, p256_sm2_mp_mod);
#ifdef WOLFSSL_SP_SMALL
        if (n != 0)
#endif
        {
            /* W = W*Y^4 */
            sp_256_mont_mul_sm2_8(w, w, t1, p256_sm2_mod, p256_sm2_mp_mod);
        }
        /* y = 2*A*(B - X) - Y^4 */
        sp_256_mont_mul_sm2_8(y, b, a, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_sub_sm2_8(y, y, t1, p256_sm2_mod);
    }
#ifndef WOLFSSL_SP_SMALL
    /* A = 3*(X^2 - W) */
    sp_256_mont_sqr_sm2_8(t1, x, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_sub_sm2_8(t1, t1, w, p256_sm2_mod);
    sp_256_mont_tpl_sm2_8(a, t1, p256_sm2_mod);
    /* B = X*Y^2 */
    sp_256_mont_sqr_sm2_8(t1, y, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_mul_sm2_8(b, t1, x, p256_sm2_mod, p256_sm2_mp_mod);
    /* X = A^2 - 2B */
    sp_256_mont_sqr_sm2_8(x, a, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_dbl_sm2_8(t2, b, p256_sm2_mod);
    sp_256_mont_sub_sm2_8(x, x, t2, p256_sm2_mod);
    /* B = 2.(B - X) */
    sp_256_mont_sub_sm2_8(t2, b, x, p256_sm2_mod);
    sp_256_mont_dbl_sm2_8(b, t2, p256_sm2_mod);
    /* Z = Z*Y */
    sp_256_mont_mul_sm2_8(z, z, y, p256_sm2_mod, p256_sm2_mp_mod);
    /* t1 = Y^4 */
    sp_256_mont_sqr_sm2_8(t1, t1, p256_sm2_mod, p256_sm2_mp_mod);
    /* y = 2*A*(B - X) - Y^4 */
    sp_256_mont_mul_sm2_8(y, b, a, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_sub_sm2_8(y, y, t1, p256_sm2_mod);
#endif /* WOLFSSL_SP_SMALL */
    /* Y = Y/2 */
    sp_256_mont_div2_sm2_8(y, y, p256_sm2_mod);
}

/* Convert the projective point to affine.
 * Ordinates are in Montgomery form.
 *
 * a  Point to convert.
 * t  Temporary data.
 */
static void sp_256_proj_to_affine_sm2_8(sp_point_256* a, sp_digit* t)
{
    sp_digit* t1 = t;
    sp_digit* t2 = t + 2 * 8;
    sp_digit* tmp = t + 4 * 8;

    sp_256_mont_inv_sm2_8(t1, a->z, tmp);

    sp_256_mont_sqr_sm2_8(t2, t1, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_mul_sm2_8(t1, t2, t1, p256_sm2_mod, p256_sm2_mp_mod);

    sp_256_mont_mul_sm2_8(a->x, a->x, t2, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_mul_sm2_8(a->y, a->y, t1, p256_sm2_mod, p256_sm2_mp_mod);
    XMEMCPY(a->z, p256_sm2_norm_mod, sizeof(p256_sm2_norm_mod));
}

#endif /* FP_ECC */
/* A table entry for pre-computed points. */
typedef struct sp_table_entry_256 {
    sp_digit x[8];
    sp_digit y[8];
} sp_table_entry_256;

#ifdef FP_ECC
#endif /* FP_ECC */
/* Add two Montgomery form projective points. The second point has a q value of
 * one.
 * Only the first point can be the same pointer as the result point.
 *
 * r  Result of addition.
 * p  First point to add.
 * q  Second point to add.
 * t  Temporary ordinate data.
 */
static void sp_256_proj_point_add_qz1_sm2_8(sp_point_256* r,
    const sp_point_256* p, const sp_point_256* q, sp_digit* t)
{
    sp_digit* t2 = t;
    sp_digit* t3 = t + 2*8;
    sp_digit* t6 = t + 4*8;
    sp_digit* t1 = t + 6*8;
    sp_digit* t4 = t + 8*8;
    sp_digit* t5 = t + 10*8;

    /* Calculate values to subtract from P->x and P->y. */
    /* U2 = X2*Z1^2 */
    sp_256_mont_sqr_sm2_8(t2, p->z, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_mul_sm2_8(t4, t2, p->z, p256_sm2_mod, p256_sm2_mp_mod);
    sp_256_mont_mul_sm2_8(t2, t2, q->x, p256_sm2_mod, p256_sm2_mp_mod);
    /* S2 = Y2*Z1^3 */
    sp_256_mont_mul_sm2_8(t4, t4, q->y, p256_sm2_mod, p256_sm2_mp_mod);

    if ((~p->infinity) & (~q->infinity) &
            sp_256_cmp_equal_8(p->x, t2) &
            sp_256_cmp_equal_8(p->y, t4)) {
        sp_256_proj_point_dbl_sm2_8(r, p, t);
    }
    else {
        sp_digit* x = t2;
        sp_digit* y = t3;
        sp_digit* z = t6;

        /* H = U2 - X1 */
        sp_256_mont_sub_sm2_8(t2, t2, p->x, p256_sm2_mod);
        /* R = S2 - Y1 */
        sp_256_mont_sub_sm2_8(t4, t4, p->y, p256_sm2_mod);
        /* Z3 = H*Z1 */
        sp_256_mont_mul_sm2_8(z, p->z, t2, p256_sm2_mod, p256_sm2_mp_mod);
        /* X3 = R^2 - H^3 - 2*X1*H^2 */
        sp_256_mont_sqr_sm2_8(t1, t2, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_mul_sm2_8(t3, p->x, t1, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_mul_sm2_8(t1, t1, t2, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_sqr_sm2_8(t2, t4, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_sub_sm2_8(t2, t2, t1, p256_sm2_mod);
        sp_256_mont_dbl_sm2_8(t5, t3, p256_sm2_mod);
        sp_256_mont_sub_sm2_8(x, t2, t5, p256_sm2_mod);
        /* Y3 = R*(X1*H^2 - X3) - Y1*H^3 */
        sp_256_mont_sub_sm2_8(t3, t3, x, p256_sm2_mod);
        sp_256_mont_mul_sm2_8(t3, t3, t4, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_mul_sm2_8(t1, t1, p->y, p256_sm2_mod, p256_sm2_mp_mod);
        sp_256_mont_sub_sm2_8(y, t3, t1, p256_sm2_mod);
        {
            int i;
            sp_digit maskp = (sp_digit)(0 - (q->infinity & (!p->infinity)));
            sp_digit maskq = (sp_digit)(0 - (p->infinity & (!q->infinity)));
            sp_digit maskt = ~(maskp | maskq);
            sp_digit inf = (sp_digit)(p->infinity & q->infinity);

            for (i = 0; i < 8; i++) {
                r->x[i] = (p->x[i] & maskp) | (q->x[i] & maskq) |
                          (x[i] & maskt);
            }
            for (i = 0; i < 8; i++) {
                r->y[i] = (p->y[i] & maskp) | (q->y[i] & maskq) |
                          (y[i] & maskt);
            }
            for (i = 0; i < 8; i++) {
                r->z[i] = (p->z[i] & maskp) | (q->z[i] & maskq) |
                          (z[i] & maskt);
            }
            r->z[0] |= inf;
            r->infinity = (int)inf;
        }
    }
}

#ifdef WOLFSSL_SP_SMALL
#ifdef FP_ECC
/* Generate the pre-computed table of points for the base point.
 *
 * width = 4
 * 16 entries
 * 64 bits between
 *
 * a      The base point.
 * table  Place to store generated point data.
 * tmp    Temporary data.
 * heap  Heap to use for allocation.
 */
static int sp_256_gen_stripe_table_sm2_8(const sp_point_256* a,
        sp_table_entry_256* table, sp_digit* tmp, void* heap)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_point_256* t = NULL;
#else
    sp_point_256 t[3];
#endif
    sp_point_256* s1 = NULL;
    sp_point_256* s2 = NULL;
    int i;
    int j;
    int err = MP_OKAY;

    (void)heap;

#ifdef WOLFSSL_SP_SMALL_STACK
    t = (sp_point_256*)XMALLOC(sizeof(sp_point_256) * 3, heap,
                                     DYNAMIC_TYPE_ECC);
    if (t == NULL)
        err = MEMORY_E;
#endif

    if (err == MP_OKAY) {
        s1 = t + 1;
        s2 = t + 2;

        err = sp_256_mod_mul_norm_sm2_8(t->x, a->x, p256_sm2_mod);
    }
    if (err == MP_OKAY) {
        err = sp_256_mod_mul_norm_sm2_8(t->y, a->y, p256_sm2_mod);
    }
    if (err == MP_OKAY) {
        err = sp_256_mod_mul_norm_sm2_8(t->z, a->z, p256_sm2_mod);
    }
    if (err == MP_OKAY) {
        t->infinity = 0;
        sp_256_proj_to_affine_sm2_8(t, tmp);

        XMEMCPY(s1->z, p256_sm2_norm_mod, sizeof(p256_sm2_norm_mod));
        s1->infinity = 0;
        XMEMCPY(s2->z, p256_sm2_norm_mod, sizeof(p256_sm2_norm_mod));
        s2->infinity = 0;

        /* table[0] = {0, 0, infinity} */
        XMEMSET(&table[0], 0, sizeof(sp_table_entry_256));
        /* table[1] = Affine version of 'a' in Montgomery form */
        XMEMCPY(table[1].x, t->x, sizeof(table->x));
        XMEMCPY(table[1].y, t->y, sizeof(table->y));

        for (i=1; i<4; i++) {
            sp_256_proj_point_dbl_n_sm2_8(t, 64, tmp);
            sp_256_proj_to_affine_sm2_8(t, tmp);
            XMEMCPY(table[1<<i].x, t->x, sizeof(table->x));
            XMEMCPY(table[1<<i].y, t->y, sizeof(table->y));
        }

        for (i=1; i<4; i++) {
            XMEMCPY(s1->x, table[1<<i].x, sizeof(table->x));
            XMEMCPY(s1->y, table[1<<i].y, sizeof(table->y));
            for (j=(1<<i)+1; j<(1<<(i+1)); j++) {
                XMEMCPY(s2->x, table[j-(1<<i)].x, sizeof(table->x));
                XMEMCPY(s2->y, table[j-(1<<i)].y, sizeof(table->y));
                sp_256_proj_point_add_qz1_sm2_8(t, s1, s2, tmp);
                sp_256_proj_to_affine_sm2_8(t, tmp);
                XMEMCPY(table[j].x, t->x, sizeof(table->x));
                XMEMCPY(table[j].y, t->y, sizeof(table->y));
            }
        }
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(t, heap, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

#endif /* FP_ECC */
#ifndef WC_NO_CACHE_RESISTANT
/* Touch each possible entry that could be being copied.
 *
 * r      Point to copy into.
 * table  Table - start of the entries to access
 * idx    Index of entry to retrieve.
 */
static void sp_256_get_entry_16_sm2_8(sp_point_256* r,
    const sp_table_entry_256* table, int idx)
{
    int i;
    sp_digit mask;

    r->x[0] = 0;
    r->x[1] = 0;
    r->x[2] = 0;
    r->x[3] = 0;
    r->x[4] = 0;
    r->x[5] = 0;
    r->x[6] = 0;
    r->x[7] = 0;
    r->y[0] = 0;
    r->y[1] = 0;
    r->y[2] = 0;
    r->y[3] = 0;
    r->y[4] = 0;
    r->y[5] = 0;
    r->y[6] = 0;
    r->y[7] = 0;
    for (i = 1; i < 16; i++) {
        mask = (sp_digit)0 - (i == idx);
        r->x[0] |= mask & table[i].x[0];
        r->x[1] |= mask & table[i].x[1];
        r->x[2] |= mask & table[i].x[2];
        r->x[3] |= mask & table[i].x[3];
        r->x[4] |= mask & table[i].x[4];
        r->x[5] |= mask & table[i].x[5];
        r->x[6] |= mask & table[i].x[6];
        r->x[7] |= mask & table[i].x[7];
        r->y[0] |= mask & table[i].y[0];
        r->y[1] |= mask & table[i].y[1];
        r->y[2] |= mask & table[i].y[2];
        r->y[3] |= mask & table[i].y[3];
        r->y[4] |= mask & table[i].y[4];
        r->y[5] |= mask & table[i].y[5];
        r->y[6] |= mask & table[i].y[6];
        r->y[7] |= mask & table[i].y[7];
    }
}
#endif /* !WC_NO_CACHE_RESISTANT */
/* Multiply the point by the scalar and return the result.
 * If map is true then convert result to affine coordinates.
 *
 * Stripe implementation.
 * Pre-generated: 2^0, 2^64, ...
 * Pre-generated: products of all combinations of above.
 * 4 doubles and adds (with qz=1)
 *
 * r      Resulting point.
 * k      Scalar to multiply by.
 * table  Pre-computed table.
 * map    Indicates whether to convert result to affine.
 * ct     Constant time required.
 * heap   Heap to use for allocation.
 * returns MEMORY_E when memory allocation fails and MP_OKAY on success.
 */
static int sp_256_ecc_mulmod_stripe_sm2_8(sp_point_256* r, const sp_point_256* g,
        const sp_table_entry_256* table, const sp_digit* k, int map,
        int ct, void* heap)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_point_256* rt = NULL;
    sp_digit* t = NULL;
#else
    sp_point_256 rt[2];
    sp_digit t[2 * 8 * 6];
#endif
    sp_point_256* p = NULL;
    int i;
    int j;
    int y;
    int x;
    int err = MP_OKAY;

    (void)g;
    /* Constant time used for cache attack resistance implementation. */
    (void)ct;
    (void)heap;


#ifdef WOLFSSL_SP_SMALL_STACK
    rt = (sp_point_256*)XMALLOC(sizeof(sp_point_256) * 2, heap,
                                      DYNAMIC_TYPE_ECC);
    if (rt == NULL)
        err = MEMORY_E;
    if (err == MP_OKAY) {
        t = (sp_digit*)XMALLOC(sizeof(sp_digit) * 2 * 8 * 6, heap,
                               DYNAMIC_TYPE_ECC);
        if (t == NULL)
            err = MEMORY_E;
    }
#endif

    if (err == MP_OKAY) {
        p = rt + 1;

        XMEMCPY(p->z, p256_sm2_norm_mod, sizeof(p256_sm2_norm_mod));
        XMEMCPY(rt->z, p256_sm2_norm_mod, sizeof(p256_sm2_norm_mod));

        y = 0;
        x = 63;
        for (j=0; j<4; j++) {
            y |= (int)(((k[x / 32] >> (x % 32)) & 1) << j);
            x += 64;
        }
    #ifndef WC_NO_CACHE_RESISTANT
        if (ct) {
            sp_256_get_entry_16_sm2_8(rt, table, y);
        } else
    #endif
        {
            XMEMCPY(rt->x, table[y].x, sizeof(table[y].x));
            XMEMCPY(rt->y, table[y].y, sizeof(table[y].y));
        }
        rt->infinity = !y;
        for (i=62; i>=0; i--) {
            y = 0;
            x = i;
            for (j=0; j<4; j++) {
                y |= (int)(((k[x / 32] >> (x % 32)) & 1) << j);
                x += 64;
            }

            sp_256_proj_point_dbl_sm2_8(rt, rt, t);
        #ifndef WC_NO_CACHE_RESISTANT
            if (ct) {
                sp_256_get_entry_16_sm2_8(p, table, y);
            }
            else
        #endif
            {
                XMEMCPY(p->x, table[y].x, sizeof(table[y].x));
                XMEMCPY(p->y, table[y].y, sizeof(table[y].y));
            }
            p->infinity = !y;
            sp_256_proj_point_add_qz1_sm2_8(rt, rt, p, t);
        }

        if (map != 0) {
            sp_256_map_sm2_8(r, rt, t);
        }
        else {
            XMEMCPY(r, rt, sizeof(sp_point_256));
        }
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(t, heap, DYNAMIC_TYPE_ECC);
    XFREE(rt, heap, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

#ifdef FP_ECC
#ifndef FP_ENTRIES
    #define FP_ENTRIES 16
#endif

/* Cache entry - holds precomputation tables for a point. */
typedef struct sp_cache_256_t {
    /* X ordinate of point that table was generated from. */
    sp_digit x[8];
    /* Y ordinate of point that table was generated from. */
    sp_digit y[8];
    /* Precomputation table for point. */
    sp_table_entry_256 table[16];
    /* Count of entries in table. */
    uint32_t cnt;
    /* Point and table set in entry. */
    int set;
} sp_cache_256_t;

/* Cache of tables. */
static THREAD_LS_T sp_cache_256_t sp_cache_256[FP_ENTRIES];
/* Index of last entry in cache. */
static THREAD_LS_T int sp_cache_256_last = -1;
/* Cache has been initialized. */
static THREAD_LS_T int sp_cache_256_inited = 0;

#ifndef HAVE_THREAD_LS
    #ifndef WOLFSSL_MUTEX_INITIALIZER
    static volatile int initCacheMutex_256 = 0;
    #endif
    static wolfSSL_Mutex sp_cache_256_lock WOLFSSL_MUTEX_INITIALIZER_CLAUSE(sp_cache_256_lock);
#endif

/* Get the cache entry for the point.
 *
 * g      [in]   Point scalar multiplying.
 * cache  [out]  Cache table to use.
 */
static void sp_ecc_get_cache_256(const sp_point_256* g, sp_cache_256_t** cache)
{
    int i;
    int j;
    uint32_t least;

    if (sp_cache_256_inited == 0) {
        for (i=0; i<FP_ENTRIES; i++) {
            sp_cache_256[i].set = 0;
        }
        sp_cache_256_inited = 1;
    }

    /* Compare point with those in cache. */
    for (i=0; i<FP_ENTRIES; i++) {
        if (!sp_cache_256[i].set)
            continue;

        if (sp_256_cmp_equal_8(g->x, sp_cache_256[i].x) &
                           sp_256_cmp_equal_8(g->y, sp_cache_256[i].y)) {
            sp_cache_256[i].cnt++;
            break;
        }
    }

    /* No match. */
    if (i == FP_ENTRIES) {
        /* Find empty entry. */
        i = (sp_cache_256_last + 1) % FP_ENTRIES;
        for (; i != sp_cache_256_last; i=(i+1)%FP_ENTRIES) {
            if (!sp_cache_256[i].set) {
                break;
            }
        }

        /* Evict least used. */
        if (i == sp_cache_256_last) {
            least = sp_cache_256[0].cnt;
            for (j=1; j<FP_ENTRIES; j++) {
                if (sp_cache_256[j].cnt < least) {
                    i = j;
                    least = sp_cache_256[i].cnt;
                }
            }
        }

        XMEMCPY(sp_cache_256[i].x, g->x, sizeof(sp_cache_256[i].x));
        XMEMCPY(sp_cache_256[i].y, g->y, sizeof(sp_cache_256[i].y));
        sp_cache_256[i].set = 1;
        sp_cache_256[i].cnt = 1;
    }

    *cache = &sp_cache_256[i];
    sp_cache_256_last = i;
}
#endif /* FP_ECC */

/* Multiply the base point of P256 by the scalar and return the result.
 * If map is true then convert result to affine coordinates.
 *
 * r     Resulting point.
 * g     Point to multiply.
 * k     Scalar to multiply by.
 * map   Indicates whether to convert result to affine.
 * ct    Constant time required.
 * heap  Heap to use for allocation.
 * returns MEMORY_E when memory allocation fails and MP_OKAY on success.
 */
static int sp_256_ecc_mulmod_sm2_8(sp_point_256* r, const sp_point_256* g,
        const sp_digit* k, int map, int ct, void* heap)
{
#ifndef FP_ECC
    return sp_256_ecc_mulmod_fast_sm2_8(r, g, k, map, ct, heap);
#else
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_digit* tmp;
#else
    sp_digit tmp[2 * 8 * 6];
#endif
    sp_cache_256_t* cache;
    int err = MP_OKAY;

#ifdef WOLFSSL_SP_SMALL_STACK
    tmp = (sp_digit*)XMALLOC(sizeof(sp_digit) * 2 * 8 * 6, heap, DYNAMIC_TYPE_ECC);
    if (tmp == NULL) {
        err = MEMORY_E;
    }
#endif
#ifndef HAVE_THREAD_LS
    if (err == MP_OKAY) {
        #ifndef WOLFSSL_MUTEX_INITIALIZER
        if (initCacheMutex_256 == 0) {
            wc_InitMutex(&sp_cache_256_lock);
            initCacheMutex_256 = 1;
        }
        #endif
        if (wc_LockMutex(&sp_cache_256_lock) != 0) {
            err = BAD_MUTEX_E;
        }
    }
#endif /* HAVE_THREAD_LS */

    if (err == MP_OKAY) {
        sp_ecc_get_cache_256(g, &cache);
        if (cache->cnt == 2)
            sp_256_gen_stripe_table_sm2_8(g, cache->table, tmp, heap);

#ifndef HAVE_THREAD_LS
        wc_UnLockMutex(&sp_cache_256_lock);
#endif /* HAVE_THREAD_LS */

        if (cache->cnt < 2) {
            err = sp_256_ecc_mulmod_fast_sm2_8(r, g, k, map, ct, heap);
        }
        else {
            err = sp_256_ecc_mulmod_stripe_sm2_8(r, g, cache->table, k,
                    map, ct, heap);
        }
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(tmp, heap, DYNAMIC_TYPE_ECC);
#endif
    return err;
#endif
}

#else
#ifdef FP_ECC
/* Generate the pre-computed table of points for the base point.
 *
 * width = 8
 * 256 entries
 * 32 bits between
 *
 * a      The base point.
 * table  Place to store generated point data.
 * tmp    Temporary data.
 * heap  Heap to use for allocation.
 */
static int sp_256_gen_stripe_table_sm2_8(const sp_point_256* a,
        sp_table_entry_256* table, sp_digit* tmp, void* heap)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_point_256* t = NULL;
#else
    sp_point_256 t[3];
#endif
    sp_point_256* s1 = NULL;
    sp_point_256* s2 = NULL;
    int i;
    int j;
    int err = MP_OKAY;

    (void)heap;

#ifdef WOLFSSL_SP_SMALL_STACK
    t = (sp_point_256*)XMALLOC(sizeof(sp_point_256) * 3, heap,
                                     DYNAMIC_TYPE_ECC);
    if (t == NULL)
        err = MEMORY_E;
#endif

    if (err == MP_OKAY) {
        s1 = t + 1;
        s2 = t + 2;

        err = sp_256_mod_mul_norm_sm2_8(t->x, a->x, p256_sm2_mod);
    }
    if (err == MP_OKAY) {
        err = sp_256_mod_mul_norm_sm2_8(t->y, a->y, p256_sm2_mod);
    }
    if (err == MP_OKAY) {
        err = sp_256_mod_mul_norm_sm2_8(t->z, a->z, p256_sm2_mod);
    }
    if (err == MP_OKAY) {
        t->infinity = 0;
        sp_256_proj_to_affine_sm2_8(t, tmp);

        XMEMCPY(s1->z, p256_sm2_norm_mod, sizeof(p256_sm2_norm_mod));
        s1->infinity = 0;
        XMEMCPY(s2->z, p256_sm2_norm_mod, sizeof(p256_sm2_norm_mod));
        s2->infinity = 0;

        /* table[0] = {0, 0, infinity} */
        XMEMSET(&table[0], 0, sizeof(sp_table_entry_256));
        /* table[1] = Affine version of 'a' in Montgomery form */
        XMEMCPY(table[1].x, t->x, sizeof(table->x));
        XMEMCPY(table[1].y, t->y, sizeof(table->y));

        for (i=1; i<8; i++) {
            sp_256_proj_point_dbl_n_sm2_8(t, 32, tmp);
            sp_256_proj_to_affine_sm2_8(t, tmp);
            XMEMCPY(table[1<<i].x, t->x, sizeof(table->x));
            XMEMCPY(table[1<<i].y, t->y, sizeof(table->y));
        }

        for (i=1; i<8; i++) {
            XMEMCPY(s1->x, table[1<<i].x, sizeof(table->x));
            XMEMCPY(s1->y, table[1<<i].y, sizeof(table->y));
            for (j=(1<<i)+1; j<(1<<(i+1)); j++) {
                XMEMCPY(s2->x, table[j-(1<<i)].x, sizeof(table->x));
                XMEMCPY(s2->y, table[j-(1<<i)].y, sizeof(table->y));
                sp_256_proj_point_add_qz1_sm2_8(t, s1, s2, tmp);
                sp_256_proj_to_affine_sm2_8(t, tmp);
                XMEMCPY(table[j].x, t->x, sizeof(table->x));
                XMEMCPY(table[j].y, t->y, sizeof(table->y));
            }
        }
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(t, heap, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

#endif /* FP_ECC */
#ifndef WC_NO_CACHE_RESISTANT
/* Touch each possible entry that could be being copied.
 *
 * r      Point to copy into.
 * table  Table - start of the entries to access
 * idx    Index of entry to retrieve.
 */
static void sp_256_get_entry_256_sm2_8(sp_point_256* r,
    const sp_table_entry_256* table, int idx)
{
    int i;
    sp_digit mask;

    r->x[0] = 0;
    r->x[1] = 0;
    r->x[2] = 0;
    r->x[3] = 0;
    r->x[4] = 0;
    r->x[5] = 0;
    r->x[6] = 0;
    r->x[7] = 0;
    r->y[0] = 0;
    r->y[1] = 0;
    r->y[2] = 0;
    r->y[3] = 0;
    r->y[4] = 0;
    r->y[5] = 0;
    r->y[6] = 0;
    r->y[7] = 0;
    for (i = 1; i < 256; i++) {
        mask = (sp_digit)0 - (i == idx);
        r->x[0] |= mask & table[i].x[0];
        r->x[1] |= mask & table[i].x[1];
        r->x[2] |= mask & table[i].x[2];
        r->x[3] |= mask & table[i].x[3];
        r->x[4] |= mask & table[i].x[4];
        r->x[5] |= mask & table[i].x[5];
        r->x[6] |= mask & table[i].x[6];
        r->x[7] |= mask & table[i].x[7];
        r->y[0] |= mask & table[i].y[0];
        r->y[1] |= mask & table[i].y[1];
        r->y[2] |= mask & table[i].y[2];
        r->y[3] |= mask & table[i].y[3];
        r->y[4] |= mask & table[i].y[4];
        r->y[5] |= mask & table[i].y[5];
        r->y[6] |= mask & table[i].y[6];
        r->y[7] |= mask & table[i].y[7];
    }
}
#endif /* !WC_NO_CACHE_RESISTANT */
/* Multiply the point by the scalar and return the result.
 * If map is true then convert result to affine coordinates.
 *
 * Stripe implementation.
 * Pre-generated: 2^0, 2^32, ...
 * Pre-generated: products of all combinations of above.
 * 8 doubles and adds (with qz=1)
 *
 * r      Resulting point.
 * k      Scalar to multiply by.
 * table  Pre-computed table.
 * map    Indicates whether to convert result to affine.
 * ct     Constant time required.
 * heap   Heap to use for allocation.
 * returns MEMORY_E when memory allocation fails and MP_OKAY on success.
 */
static int sp_256_ecc_mulmod_stripe_sm2_8(sp_point_256* r, const sp_point_256* g,
        const sp_table_entry_256* table, const sp_digit* k, int map,
        int ct, void* heap)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_point_256* rt = NULL;
    sp_digit* t = NULL;
#else
    sp_point_256 rt[2];
    sp_digit t[2 * 8 * 6];
#endif
    sp_point_256* p = NULL;
    int i;
    int j;
    int y;
    int x;
    int err = MP_OKAY;

    (void)g;
    /* Constant time used for cache attack resistance implementation. */
    (void)ct;
    (void)heap;


#ifdef WOLFSSL_SP_SMALL_STACK
    rt = (sp_point_256*)XMALLOC(sizeof(sp_point_256) * 2, heap,
                                      DYNAMIC_TYPE_ECC);
    if (rt == NULL)
        err = MEMORY_E;
    if (err == MP_OKAY) {
        t = (sp_digit*)XMALLOC(sizeof(sp_digit) * 2 * 8 * 6, heap,
                               DYNAMIC_TYPE_ECC);
        if (t == NULL)
            err = MEMORY_E;
    }
#endif

    if (err == MP_OKAY) {
        p = rt + 1;

        XMEMCPY(p->z, p256_sm2_norm_mod, sizeof(p256_sm2_norm_mod));
        XMEMCPY(rt->z, p256_sm2_norm_mod, sizeof(p256_sm2_norm_mod));

        y = 0;
        x = 31;
        for (j=0; j<8; j++) {
            y |= (int)(((k[x / 32] >> (x % 32)) & 1) << j);
            x += 32;
        }
    #ifndef WC_NO_CACHE_RESISTANT
        if (ct) {
            sp_256_get_entry_256_sm2_8(rt, table, y);
        } else
    #endif
        {
            XMEMCPY(rt->x, table[y].x, sizeof(table[y].x));
            XMEMCPY(rt->y, table[y].y, sizeof(table[y].y));
        }
        rt->infinity = !y;
        for (i=30; i>=0; i--) {
            y = 0;
            x = i;
            for (j=0; j<8; j++) {
                y |= (int)(((k[x / 32] >> (x % 32)) & 1) << j);
                x += 32;
            }

            sp_256_proj_point_dbl_sm2_8(rt, rt, t);
        #ifndef WC_NO_CACHE_RESISTANT
            if (ct) {
                sp_256_get_entry_256_sm2_8(p, table, y);
            }
            else
        #endif
            {
                XMEMCPY(p->x, table[y].x, sizeof(table[y].x));
                XMEMCPY(p->y, table[y].y, sizeof(table[y].y));
            }
            p->infinity = !y;
            sp_256_proj_point_add_qz1_sm2_8(rt, rt, p, t);
        }

        if (map != 0) {
            sp_256_map_sm2_8(r, rt, t);
        }
        else {
            XMEMCPY(r, rt, sizeof(sp_point_256));
        }
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(t, heap, DYNAMIC_TYPE_ECC);
    XFREE(rt, heap, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

#ifdef FP_ECC
#ifndef FP_ENTRIES
    #define FP_ENTRIES 16
#endif

/* Cache entry - holds precomputation tables for a point. */
typedef struct sp_cache_256_t {
    /* X ordinate of point that table was generated from. */
    sp_digit x[8];
    /* Y ordinate of point that table was generated from. */
    sp_digit y[8];
    /* Precomputation table for point. */
    sp_table_entry_256 table[256];
    /* Count of entries in table. */
    uint32_t cnt;
    /* Point and table set in entry. */
    int set;
} sp_cache_256_t;

/* Cache of tables. */
static THREAD_LS_T sp_cache_256_t sp_cache_256[FP_ENTRIES];
/* Index of last entry in cache. */
static THREAD_LS_T int sp_cache_256_last = -1;
/* Cache has been initialized. */
static THREAD_LS_T int sp_cache_256_inited = 0;

#ifndef HAVE_THREAD_LS
    #ifndef WOLFSSL_MUTEX_INITIALIZER
    static volatile int initCacheMutex_256 = 0;
    #endif
    static wolfSSL_Mutex sp_cache_256_lock WOLFSSL_MUTEX_INITIALIZER_CLAUSE(sp_cache_256_lock);
#endif

/* Get the cache entry for the point.
 *
 * g      [in]   Point scalar multiplying.
 * cache  [out]  Cache table to use.
 */
static void sp_ecc_get_cache_256(const sp_point_256* g, sp_cache_256_t** cache)
{
    int i;
    int j;
    uint32_t least;

    if (sp_cache_256_inited == 0) {
        for (i=0; i<FP_ENTRIES; i++) {
            sp_cache_256[i].set = 0;
        }
        sp_cache_256_inited = 1;
    }

    /* Compare point with those in cache. */
    for (i=0; i<FP_ENTRIES; i++) {
        if (!sp_cache_256[i].set)
            continue;

        if (sp_256_cmp_equal_8(g->x, sp_cache_256[i].x) &
                           sp_256_cmp_equal_8(g->y, sp_cache_256[i].y)) {
            sp_cache_256[i].cnt++;
            break;
        }
    }

    /* No match. */
    if (i == FP_ENTRIES) {
        /* Find empty entry. */
        i = (sp_cache_256_last + 1) % FP_ENTRIES;
        for (; i != sp_cache_256_last; i=(i+1)%FP_ENTRIES) {
            if (!sp_cache_256[i].set) {
                break;
            }
        }

        /* Evict least used. */
        if (i == sp_cache_256_last) {
            least = sp_cache_256[0].cnt;
            for (j=1; j<FP_ENTRIES; j++) {
                if (sp_cache_256[j].cnt < least) {
                    i = j;
                    least = sp_cache_256[i].cnt;
                }
            }
        }

        XMEMCPY(sp_cache_256[i].x, g->x, sizeof(sp_cache_256[i].x));
        XMEMCPY(sp_cache_256[i].y, g->y, sizeof(sp_cache_256[i].y));
        sp_cache_256[i].set = 1;
        sp_cache_256[i].cnt = 1;
    }

    *cache = &sp_cache_256[i];
    sp_cache_256_last = i;
}
#endif /* FP_ECC */

/* Multiply the base point of P256 by the scalar and return the result.
 * If map is true then convert result to affine coordinates.
 *
 * r     Resulting point.
 * g     Point to multiply.
 * k     Scalar to multiply by.
 * map   Indicates whether to convert result to affine.
 * ct    Constant time required.
 * heap  Heap to use for allocation.
 * returns MEMORY_E when memory allocation fails and MP_OKAY on success.
 */
static int sp_256_ecc_mulmod_sm2_8(sp_point_256* r, const sp_point_256* g,
        const sp_digit* k, int map, int ct, void* heap)
{
#ifndef FP_ECC
    return sp_256_ecc_mulmod_fast_sm2_8(r, g, k, map, ct, heap);
#else
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_digit* tmp;
#else
    sp_digit tmp[2 * 8 * 6];
#endif
    sp_cache_256_t* cache;
    int err = MP_OKAY;

#ifdef WOLFSSL_SP_SMALL_STACK
    tmp = (sp_digit*)XMALLOC(sizeof(sp_digit) * 2 * 8 * 6, heap, DYNAMIC_TYPE_ECC);
    if (tmp == NULL) {
        err = MEMORY_E;
    }
#endif
#ifndef HAVE_THREAD_LS
    if (err == MP_OKAY) {
        #ifndef WOLFSSL_MUTEX_INITIALIZER
        if (initCacheMutex_256 == 0) {
            wc_InitMutex(&sp_cache_256_lock);
            initCacheMutex_256 = 1;
        }
        #endif
        if (wc_LockMutex(&sp_cache_256_lock) != 0) {
            err = BAD_MUTEX_E;
        }
    }
#endif /* HAVE_THREAD_LS */

    if (err == MP_OKAY) {
        sp_ecc_get_cache_256(g, &cache);
        if (cache->cnt == 2)
            sp_256_gen_stripe_table_sm2_8(g, cache->table, tmp, heap);

#ifndef HAVE_THREAD_LS
        wc_UnLockMutex(&sp_cache_256_lock);
#endif /* HAVE_THREAD_LS */

        if (cache->cnt < 2) {
            err = sp_256_ecc_mulmod_fast_sm2_8(r, g, k, map, ct, heap);
        }
        else {
            err = sp_256_ecc_mulmod_stripe_sm2_8(r, g, cache->table, k,
                    map, ct, heap);
        }
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(tmp, heap, DYNAMIC_TYPE_ECC);
#endif
    return err;
#endif
}

#endif /* WOLFSSL_SP_SMALL */
/* Multiply the point by the scalar and return the result.
 * If map is true then convert result to affine coordinates.
 *
 * km    Scalar to multiply by.
 * p     Point to multiply.
 * r     Resulting point.
 * map   Indicates whether to convert result to affine.
 * heap  Heap to use for allocation.
 * returns MEMORY_E when memory allocation fails and MP_OKAY on success.
 */
int sp_ecc_mulmod_sm2_256(const mp_int* km, const ecc_point* gm, ecc_point* r,
        int map, void* heap)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_point_256* point = NULL;
    sp_digit* k = NULL;
#else
    sp_point_256 point[1];
    sp_digit k[8];
#endif
    int err = MP_OKAY;

#ifdef WOLFSSL_SP_SMALL_STACK
    point = (sp_point_256*)XMALLOC(sizeof(sp_point_256), heap,
                                         DYNAMIC_TYPE_ECC);
    if (point == NULL)
        err = MEMORY_E;
    if (err == MP_OKAY) {
        k = (sp_digit*)XMALLOC(sizeof(sp_digit) * 8, heap,
                               DYNAMIC_TYPE_ECC);
        if (k == NULL)
            err = MEMORY_E;
    }
#endif

    if (err == MP_OKAY) {
        sp_256_from_mp(k, 8, km);
        sp_256_point_from_ecc_point_8(point, gm);

            err = sp_256_ecc_mulmod_sm2_8(point, point, k, map, 1, heap);
    }
    if (err == MP_OKAY) {
        err = sp_256_point_to_ecc_point_8(point, r);
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(k, heap, DYNAMIC_TYPE_ECC);
    XFREE(point, heap, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

/* Multiply the point by the scalar, add point a and return the result.
 * If map is true then convert result to affine coordinates.
 *
 * km      Scalar to multiply by.
 * p       Point to multiply.
 * am      Point to add to scalar multiply result.
 * inMont  Point to add is in montgomery form.
 * r       Resulting point.
 * map     Indicates whether to convert result to affine.
 * heap    Heap to use for allocation.
 * returns MEMORY_E when memory allocation fails and MP_OKAY on success.
 */
int sp_ecc_mulmod_add_sm2_256(const mp_int* km, const ecc_point* gm,
    const ecc_point* am, int inMont, ecc_point* r, int map, void* heap)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_point_256* point = NULL;
    sp_digit* k = NULL;
#else
    sp_point_256 point[2];
    sp_digit k[8 + 8 * 2 * 6];
#endif
    sp_point_256* addP = NULL;
    sp_digit* tmp = NULL;
    int err = MP_OKAY;

#ifdef WOLFSSL_SP_SMALL_STACK
    point = (sp_point_256*)XMALLOC(sizeof(sp_point_256) * 2, heap,
                                         DYNAMIC_TYPE_ECC);
    if (point == NULL)
        err = MEMORY_E;
    if (err == MP_OKAY) {
        k = (sp_digit*)XMALLOC(
            sizeof(sp_digit) * (8 + 8 * 2 * 6), heap,
            DYNAMIC_TYPE_ECC);
        if (k == NULL)
            err = MEMORY_E;
    }
#endif

    if (err == MP_OKAY) {
        addP = point + 1;
        tmp = k + 8;

        sp_256_from_mp(k, 8, km);
        sp_256_point_from_ecc_point_8(point, gm);
        sp_256_point_from_ecc_point_8(addP, am);
    }
    if ((err == MP_OKAY) && (!inMont)) {
        err = sp_256_mod_mul_norm_sm2_8(addP->x, addP->x, p256_sm2_mod);
    }
    if ((err == MP_OKAY) && (!inMont)) {
        err = sp_256_mod_mul_norm_sm2_8(addP->y, addP->y, p256_sm2_mod);
    }
    if ((err == MP_OKAY) && (!inMont)) {
        err = sp_256_mod_mul_norm_sm2_8(addP->z, addP->z, p256_sm2_mod);
    }
    if (err == MP_OKAY) {
            err = sp_256_ecc_mulmod_sm2_8(point, point, k, 0, 0, heap);
    }
    if (err == MP_OKAY) {
            sp_256_proj_point_add_sm2_8(point, point, addP, tmp);

        if (map) {
                sp_256_map_sm2_8(point, point, tmp);
        }

        err = sp_256_point_to_ecc_point_8(point, r);
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(k, heap, DYNAMIC_TYPE_ECC);
    XFREE(point, heap, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

#ifdef WOLFSSL_SP_SMALL
/* Striping precomputation table.
 * 4 points combined into a table of 16 points.
 * Distance of 64 between points.
 */
static const sp_table_entry_256 p256_sm2_table[16] = {
    /* 0 */
    { { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
      { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } },
    /* 1 */
    { { 0xf418029e,0x61328990,0xdca6c050,0x3e7981ed,0xac24c3c3,0xd6a1ed99,
        0xe1c13b05,0x91167a5e },
      { 0x3c2d0ddd,0xc1354e59,0x8d3295fa,0xc1f5e578,0x6e2a48f8,0x8d4cfb06,
        0x81d735bd,0x63cd65d4 } },
    /* 2 */
    { { 0xbad830d2,0x4b33e020,0x590dffb3,0x5c101f9e,0xbc80ecb0,0xcd0e0498,
        0x52aa293e,0x302787f8 },
      { 0x220f8fc8,0xbfd64ced,0xbe0ee377,0xcf5cebe0,0x8913b128,0xdc03a038,
        0xfde23279,0x4b096971 } },
    /* 3 */
    { { 0x39a0d9dc,0xb4ee84e2,0x061edfa5,0xf7d229cc,0xd4cf33d0,0x9765b24b,
        0x13329f59,0x511c69f1 },
      { 0xa07ae316,0x41095bb7,0x387f0e5a,0x3a4650f1,0x99827e4a,0x4624421c,
        0x04b4243a,0x7b1e8144 } },
    /* 4 */
    { { 0x8a914b50,0x7b9f561a,0x9154d377,0x2bf7130e,0x519b4c35,0x6800f696,
        0x568b4c56,0xc9e65040 },
      { 0x6d98a331,0x30706e00,0xe211ce1e,0x781a12f6,0x40562e5f,0x1fff9e3d,
        0x8c166747,0x6356cf46 } },
    /* 5 */
    { { 0x897518d9,0x96c4e4f3,0x66f75b0d,0x3825d80c,0x07f7ceb5,0xfa0bd6c0,
        0xa303ef24,0x5c01af69 },
      { 0x6bfcbc92,0xdd75cf9e,0x248dceae,0x8bfe4a53,0x95373421,0x519362c6,
        0x168ccb86,0x6f350880 } },
    /* 6 */
    { { 0xcf13b772,0xfa95c510,0xd95aca7c,0xa9b3fc90,0x4cb1a435,0x8e6e7790,
        0x8754e6a0,0x840b63d9 },
      { 0x33196bd2,0xcfa67981,0xef85911f,0x15ab0561,0xfbd94af6,0x504d9402,
        0xfcc90fb5,0x063173d3 } },
    /* 7 */
    { { 0x11fa5996,0x6d58e50e,0xcce6427b,0x5a7db9ba,0x95291d18,0x7d30d5aa,
        0xcd354763,0x9e69e861 },
      { 0x706bd6f9,0x2d0cbca9,0xaf3bda5f,0x63cc64b0,0x06d6cc0d,0x09cc5dbf,
        0x81e50b6b,0x533ba1aa } },
    /* 8 */
    { { 0x202bde39,0xfb3992a4,0x3d6bab98,0x2549f564,0x87712512,0x0b564642,
        0x7fde7e50,0xd52442b4 },
      { 0xa3d3e16e,0xa6cefd08,0xc83b29bd,0x5b194f0a,0x906dec8c,0x6db0edd8,
        0x02570c1e,0x7a090959 } },
    /* 9 */
    { { 0xbfab3d26,0x04d6ce6d,0x668edf18,0xf2aa223b,0xf06250ba,0xeb899557,
        0x4940d66d,0xef6bba07 },
      { 0xb78ca345,0xb483763b,0x3f08ff72,0x15867b4f,0x5bca92b2,0x91225b72,
        0x498804db,0xccead663 } },
    /* 10 */
    { { 0x487bdc21,0xd7aef5e8,0x858c0310,0x626fbd75,0x08d1054f,0x8cd9250d,
        0xd0831265,0x25a65ab1 },
      { 0xfec04e2c,0x4d0ac007,0x8ddf0f4c,0x859f4355,0x031dd8a0,0xb1d58e0b,
        0x9618799d,0x9df8ab40 } },
    /* 11 */
    { { 0x43d44adf,0x4cfcca55,0x6bf2e90e,0x6ed6f695,0x1f8b275d,0xff878d62,
        0x846471f5,0x4ac00774 },
      { 0xd59b5eaa,0xe8f08905,0xc904e73a,0xf961eb4f,0x8419c14c,0x51282943,
        0x94e41d6e,0x591e7dcf } },
    /* 12 */
    { { 0x805f0ed8,0x7254de6e,0x05ad4708,0xe0ad1d79,0xa339058e,0xf3212455,
        0x834b8957,0xf176c2f9 },
      { 0x9162ff84,0x6a42a692,0xeaa628e8,0x7af37ab5,0x0da655e1,0xe6605aa8,
        0x9bce77b6,0x840eabd9 } },
    /* 13 */
    { { 0xb891bf80,0x15e2a820,0x3dcfd53c,0xf218d7d6,0xc354f5d6,0x0b3fbb91,
        0x60ec6c0b,0xd2907e20 },
      { 0x4a8c701a,0x2ba584dd,0x9f829e57,0x1edfa8b2,0xf33ce835,0x482e8e37,
        0x75b06197,0x4f8b7581 } },
    /* 14 */
    { { 0x48e761ab,0xc1f039f8,0xa4db0990,0xb75d923c,0x85ba216c,0xfe8fffc1,
        0x64667cdc,0x5f193c87 },
      { 0x78ed1f3c,0xdce2f35c,0x77a90887,0x82cbb59e,0x521fca71,0x0c6bb634,
        0x8d79141f,0xbf0b44e8 } },
    /* 15 */
    { { 0xc6fe11e5,0xc424f15d,0x19a25ef3,0x1e866a49,0xdbb31334,0x419ace92,
        0x2408a903,0x1bd3b441 },
      { 0xcad2225b,0x1bb62300,0xcf204b84,0x44db4cab,0xcd229aa6,0x9fcf0afa,
        0xcc492384,0x38d13bed } },
};

/* Multiply the base point of P256 by the scalar and return the result.
 * If map is true then convert result to affine coordinates.
 *
 * Stripe implementation.
 * Pre-generated: 2^0, 2^64, ...
 * Pre-generated: products of all combinations of above.
 * 4 doubles and adds (with qz=1)
 *
 * r     Resulting point.
 * k     Scalar to multiply by.
 * map   Indicates whether to convert result to affine.
 * ct    Constant time required.
 * heap  Heap to use for allocation.
 * returns MEMORY_E when memory allocation fails and MP_OKAY on success.
 */
static int sp_256_ecc_mulmod_base_sm2_8(sp_point_256* r, const sp_digit* k,
        int map, int ct, void* heap)
{
    return sp_256_ecc_mulmod_stripe_sm2_8(r, &p256_sm2_base, p256_sm2_table,
                                      k, map, ct, heap);
}

#else
/* Striping precomputation table.
 * 8 points combined into a table of 256 points.
 * Distance of 32 between points.
 */
static const sp_table_entry_256 p256_sm2_table[256] = {
    /* 0 */
    { { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
      { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } },
    /* 1 */
    { { 0xf418029e,0x61328990,0xdca6c050,0x3e7981ed,0xac24c3c3,0xd6a1ed99,
        0xe1c13b05,0x91167a5e },
      { 0x3c2d0ddd,0xc1354e59,0x8d3295fa,0xc1f5e578,0x6e2a48f8,0x8d4cfb06,
        0x81d735bd,0x63cd65d4 } },
    /* 2 */
    { { 0x0cf4efe5,0xecb8f92d,0x960e2d22,0x88c47214,0x6059f079,0xca9549ef,
        0x7016da7c,0xd0a3774a },
      { 0x1d001cab,0xd51c95f6,0xa3feeec1,0x2d744def,0x0afedf2b,0xb7c20cc2,
        0x71d144a5,0xbf16c5f1 } },
    /* 3 */
    { { 0xad9c635e,0x6684ea0b,0x85246e15,0x48a44a56,0x56bb6373,0x16926cc4,
        0x43efef8e,0xb9966ebd },
      { 0x350e7f7d,0xace57f14,0xa25bdfd6,0x5c026c95,0x9ed4a592,0xf30be375,
        0x51234a24,0x74dde4e5 } },
    /* 4 */
    { { 0xbad830d2,0x4b33e020,0x590dffb3,0x5c101f9e,0xbc80ecb0,0xcd0e0498,
        0x52aa293e,0x302787f8 },
      { 0x220f8fc8,0xbfd64ced,0xbe0ee377,0xcf5cebe0,0x8913b128,0xdc03a038,
        0xfde23279,0x4b096971 } },
    /* 5 */
    { { 0x39a0d9dc,0xb4ee84e2,0x061edfa5,0xf7d229cc,0xd4cf33d0,0x9765b24b,
        0x13329f59,0x511c69f1 },
      { 0xa07ae316,0x41095bb7,0x387f0e5a,0x3a4650f1,0x99827e4a,0x4624421c,
        0x04b4243a,0x7b1e8144 } },
    /* 6 */
    { { 0xf8f2bc34,0x5de17662,0x171ae6a1,0x88408716,0x4c7cbaa0,0xc65b6470,
        0xbdce2e60,0xb56909fc },
      { 0x3e73ddb0,0x465dcb39,0x5d5e0850,0x5cca771f,0x86717cfb,0x96fe1e14,
        0xc1dcd4fb,0xfda13692 } },
    /* 7 */
    { { 0x043f38e8,0xd50c47aa,0x59faf190,0x5397eb91,0xb03d00cb,0xa9d1027e,
        0xa59a818f,0x1d04d612 },
      { 0x0328d2b3,0x59cddc86,0x87d68132,0x06f881e8,0xbf180493,0x42914fc4,
        0x0820fcbe,0xd6a600a8 } },
    /* 8 */
    { { 0x1abd31f0,0x4599b894,0x9a1da7d3,0xdb34198d,0xa0f0217d,0xa8b89523,
        0xe56b884e,0x2014cc43 },
      { 0x49efd4ee,0x6fb94f88,0x287f4ae0,0xf1b81710,0x99fd2deb,0x89d38a9a,
        0x72b67a53,0x8179277a } },
    /* 9 */
    { { 0x8e4b53df,0xa752f195,0x8bc1f19c,0x15b855b9,0xb75b2028,0xd3bcd58f,
        0x49b7651b,0x3e7e2841 },
      { 0x0b47b1aa,0x69a8e4cb,0x9750b86a,0xc3b27c7b,0x3f1415ed,0x65dc9f78,
        0x468ba56a,0xbaab4dbc } },
    /* 10 */
    { { 0xdf4f7cb3,0x33fe09ba,0x53cfe07a,0xbedb9815,0x586f167d,0x35e0c4fa,
        0x0821eb4c,0xdd4c37c9 },
      { 0xa0e9402a,0x2365240c,0x7f049720,0x694b0362,0x9b7723d8,0x1c60260d,
        0x52f8e305,0xe488f0af } },
    /* 11 */
    { { 0xeec04411,0x7bb89930,0x15b89af4,0xd659c71a,0xb64883ce,0xbe21fc69,
        0x02ad1648,0xfcdd9de0 },
      { 0x799d29fe,0x072b555d,0x971489ef,0x2c517a58,0xf45a0f68,0xdbdcc979,
        0x3cd08b95,0xb268b83f } },
    /* 12 */
    { { 0x36aed763,0x676c1049,0xd4a079be,0x8c871299,0xda194f33,0xdfafad16,
        0xc5d4925c,0x2ab29161 },
      { 0x1970c4f8,0x2264761c,0x8312b03a,0xc768d934,0x5b580022,0x187f2050,
        0xd13363c0,0x16406b19 } },
    /* 13 */
    { { 0x8f11a1b7,0x534a8d42,0xdeee83a5,0x938477f1,0xf25c6bd3,0xd77237f6,
        0x40e6ca87,0x46ef1395 },
      { 0x79dbd954,0x0830e760,0xa3a9aa6d,0xe22981b6,0xcc1aa064,0x07719e76,
        0xd044478c,0x6c909a3a } },
    /* 14 */
    { { 0x3ab4c047,0x3cd09dbd,0xc51725dd,0x8c857820,0x818a00d8,0xa0cefbac,
        0xd93d5fed,0x6bf4b678 },
      { 0x9c1c77f8,0xb7b8b764,0x3bb210ae,0xd3c82db5,0x19f40ce0,0x27f5ec75,
        0x60a39f9c,0x1c742c6d } },
    /* 15 */
    { { 0x608acdd0,0x7923d806,0x4dbe6185,0x119764c5,0x44c14789,0x58284940,
        0xebe015b9,0xba5f5971 },
      { 0x73d216f3,0x1bc235a2,0x0360f260,0x99624ba0,0xc1aaed49,0x4c8b3eef,
        0x7cde415a,0xa302e8b7 } },
    /* 16 */
    { { 0x8a914b50,0x7b9f561a,0x9154d377,0x2bf7130e,0x519b4c35,0x6800f696,
        0x568b4c56,0xc9e65040 },
      { 0x6d98a331,0x30706e00,0xe211ce1e,0x781a12f6,0x40562e5f,0x1fff9e3d,
        0x8c166747,0x6356cf46 } },
    /* 17 */
    { { 0x897518d9,0x96c4e4f3,0x66f75b0d,0x3825d80c,0x07f7ceb5,0xfa0bd6c0,
        0xa303ef24,0x5c01af69 },
      { 0x6bfcbc92,0xdd75cf9e,0x248dceae,0x8bfe4a53,0x95373421,0x519362c6,
        0x168ccb86,0x6f350880 } },
    /* 18 */
    { { 0x442e4248,0xe61cabbf,0x5ee1ab7a,0x24194cea,0x9bacbbb0,0x21b5f531,
        0xabc8abde,0x7d554b80 },
      { 0x7268ca65,0xaeb6a612,0xfe9b7a84,0x3c6f7c15,0x63559133,0x5be8a9ff,
        0x11efe081,0x9d17778c } },
    /* 19 */
    { { 0x2d347f7f,0x65f2b753,0x3a25167a,0x2f70c2b3,0xeafb45ac,0xad9c7fb5,
        0x1c3961be,0x9fcd997c },
      { 0x337ca7dd,0x25b72ce3,0x5a88b6bd,0x255e90d5,0x38834ffe,0x7b1d4dc8,
        0xf241c0db,0x0cb91039 } },
    /* 20 */
    { { 0xcf13b772,0xfa95c510,0xd95aca7c,0xa9b3fc90,0x4cb1a435,0x8e6e7790,
        0x8754e6a0,0x840b63d9 },
      { 0x33196bd2,0xcfa67981,0xef85911f,0x15ab0561,0xfbd94af6,0x504d9402,
        0xfcc90fb5,0x063173d3 } },
    /* 21 */
    { { 0x11fa5996,0x6d58e50e,0xcce6427b,0x5a7db9ba,0x95291d18,0x7d30d5aa,
        0xcd354763,0x9e69e861 },
      { 0x706bd6f9,0x2d0cbca9,0xaf3bda5f,0x63cc64b0,0x06d6cc0d,0x09cc5dbf,
        0x81e50b6b,0x533ba1aa } },
    /* 22 */
    { { 0x25a4c565,0xa5f72c24,0xd3f80897,0xc864130a,0xfb50c4d9,0x40f41882,
        0x5551ed50,0x499c1499 },
      { 0x61ee4b05,0x32404d88,0xd2729bef,0x4a3f1953,0xedbfb28b,0xff878e9a,
        0xe81b4dec,0xca18c856 } },
    /* 23 */
    { { 0x1b87826e,0x8ca4c14e,0xce8326da,0xe4b2b873,0xb0192797,0x5e0b6c47,
        0xbed322e4,0xa95e1b9e },
      { 0x4f98438b,0x94bba8c0,0x6afd2a09,0x8e5301b7,0x9a746186,0xe12fa56a,
        0x3aa68ad0,0x31b5268e } },
    /* 24 */
    { { 0xe0b8f9c6,0x2f67b871,0xe6ce880f,0x101bde96,0x2d8b362f,0x07f08fb2,
        0x3f1daf42,0xe8cfc641 },
      { 0x68742a60,0xe0883246,0xa244b370,0xeb54979d,0x02887b39,0x34cd326d,
        0x7fe7906e,0x68fd6b64 } },
    /* 25 */
    { { 0x0774bf91,0x47c92174,0x90aaeb2e,0x6879e682,0x289b5af5,0xd66bc8cf,
        0x35d21c7d,0xdc9ead34 },
      { 0x5400fd22,0xe55439d9,0x6df86577,0xb4d1200a,0x5cd5bfed,0x79f85271,
        0xa33fd89e,0xf1e74dd8 } },
    /* 26 */
    { { 0x8eadd7c7,0x5d1de787,0x6c9cf945,0x26883aae,0x469c63d2,0xf4c8d3ee,
        0x549fe13b,0x7e163562 },
      { 0x8a1e5a2d,0x6c24e7f8,0xbf1a43d2,0x7f5550a5,0xf268f8dd,0xc3fc954e,
        0x91f23634,0x2b0d6771 } },
    /* 27 */
    { { 0xbaef1d85,0xff22a87b,0xac4393ac,0xcf774cf7,0x574b1d81,0x1cdda137,
        0xc004fd6a,0xcda8f0db },
      { 0x6a5c7738,0x711e9d09,0xfca4584f,0x7189aaab,0x15b9c75c,0xeb8edd27,
        0x78db0ed1,0x0532d2b7 } },
    /* 28 */
    { { 0x7e93d304,0x46c2fd01,0xb6455b42,0x6df3f991,0x5a3146eb,0xad3fff98,
        0xc12c3c15,0x9dbadcfa },
      { 0x48adf57d,0x87a15d62,0xe7f0ad3e,0x9c0ee760,0xf115bb26,0x7ddcf16f,
        0x877423fc,0xee787b98 } },
    /* 29 */
    { { 0xa35b2fe6,0xcfd9c9cd,0x58c7b139,0xc46ffcfa,0x8f28ce21,0xdbafc873,
        0xe79837df,0x4798d018 },
      { 0xadf63b8c,0x5bbe3e66,0xfd7aa8fe,0xbc5d673e,0x133e5359,0x0e5bb7fb,
        0x9dab3fc8,0x645aa53c } },
    /* 30 */
    { { 0xd26b8292,0x84e4b573,0x343e5186,0x0d52bf00,0xb574a3b6,0x783f1d8c,
        0xd76a9e25,0xdbe3f8ec },
      { 0x99b642b8,0xd57dce03,0x770f5a79,0x5113181a,0xcdafa422,0x2b59683e,
        0x61a0aea7,0x9a73de8a } },
    /* 31 */
    { { 0x67ef03fc,0x1367e4a2,0x421bbfd0,0x5b1dd688,0x8e233f88,0xa6789acb,
        0xb9050c32,0xbcc0ad09 },
      { 0x2256ea88,0xcd5e81a8,0xc2083a41,0x2c801344,0x030d6300,0x02992221,
        0x22ac59e7,0x561e5935 } },
    /* 32 */
    { { 0x24424a48,0x11cf4c2e,0x37d4471c,0x843c73ee,0x617a488b,0xb3047fc5,
        0xe3cf861c,0xf2a91709 },
      { 0x1c3a60f7,0x84444421,0x26679148,0x74787a36,0x53d9404b,0x115fbd06,
        0x6244cef0,0x70fd3365 } },
    /* 33 */
    { { 0x1350a8ac,0x825ad1a9,0x55da889e,0xa9527d44,0x84df2c5e,0xa957f05c,
        0x9ff131fc,0x5061719a },
      { 0xa296a530,0xecdda998,0xdf7b5a9f,0x4f5af589,0xc84869a1,0xc2d1d040,
        0x6417fd96,0x8401cc8a } },
    /* 34 */
    { { 0x29853c8c,0xc89b8d31,0x5864b1c5,0x54dec399,0xf2c2b191,0x32c4b3a4,
        0xf08412b7,0x4b4b9bee },
      { 0x97ac6061,0x1a7cee6a,0x5b2c2c33,0x73038ff3,0xa903a0f6,0xa11ffda5,
        0xec43aa54,0xd8a0fa39 } },
    /* 35 */
    { { 0xb6c18ad6,0x7f2ca2f3,0x757eed8f,0xfc2c34c4,0xaadaca59,0xbdbf5e28,
        0x6fac786f,0x979a3f6a },
      { 0x50a130bc,0xe7df10cc,0x4323bd8d,0x6a3f62db,0x8d207c46,0xfc590a10,
        0x2e98c829,0x66a7b059 } },
    /* 36 */
    { { 0xdff39f50,0x96b69deb,0x4ebcd6d4,0x2a3d865f,0x823455cb,0x6ffadbd9,
        0x764ffb30,0xb1f617cd },
      { 0xe8cb5759,0x01ed713c,0x09a6e01a,0x31c4b25c,0x77d99e5e,0x3a4272ec,
        0xf4661c86,0x49ee3010 } },
    /* 37 */
    { { 0x612270de,0x4b4671bb,0xddf060ca,0x0cc60112,0x3aee95dd,0xd6fb8500,
        0xc2448f2d,0x120d05ee },
      { 0x1070c2ba,0xacb71342,0x2ac04adb,0x6eb1f759,0x05519c65,0x6f41914b,
        0x3b4a997e,0xaf69c419 } },
    /* 38 */
    { { 0xc4b11a5b,0xcad8c59a,0x57bdb1fd,0x05d68942,0xdb66574d,0x22d7b638,
        0x30dfab7c,0xd060d0a9 },
      { 0xe0c8e41d,0x5edc0102,0x4a22e5c2,0xe4718293,0xd280fd21,0x9d5a138c,
        0xdfd6b471,0xe47ed3fc } },
    /* 39 */
    { { 0xce30e491,0x5f0fe174,0x4081468a,0xb664382e,0x5ae38ff1,0x8e14c714,
        0x5ea3103f,0x21b63d38 },
      { 0x312036e2,0xafa86cca,0x22b39fe3,0x1fbf7bb4,0xee1061f2,0x59f85460,
        0x28092e57,0x86565def } },
    /* 40 */
    { { 0xa2d0b7ff,0x593a7870,0x60786676,0x286a76e5,0x14e51639,0x00016a4a,
        0x1ba83628,0x176e05d8 },
      { 0xccd7f1c9,0x86eb39ca,0x32f77ef2,0x89dbbf0e,0xc7fa33f0,0x7e6ff400,
        0x406df605,0x1a174b70 } },
    /* 41 */
    { { 0x4d69fcde,0x78ac0d1a,0x910960ad,0x5aedf5e6,0x92339353,0x67103e79,
        0x391534e1,0x0adf982c },
      { 0xdbf326a6,0xe98fd8b7,0x530e4fa6,0x3f71664f,0xd05ba2a9,0x7772c027,
        0xdb678aa1,0x5ecf1ee5 } },
    /* 42 */
    { { 0x924bd676,0x3ae88e90,0x5ddf5faa,0xc7e2a614,0xff44bde9,0x0c01b5a7,
        0xf664d896,0x9b16db80 },
      { 0x5c63dee2,0xd7f4bb3c,0x013c90b9,0x1e57e0cf,0xd59a92ed,0xe6a403dc,
        0x4c61c564,0x90151508 } },
    /* 43 */
    { { 0x222ca5cb,0xc0736835,0x528a8c2b,0x4b7bbc44,0x9091a70e,0xf2e9a9b5,
        0xca8c8302,0x02bdce5a },
      { 0x0c61cf3d,0x3290d35a,0x3401929e,0x13e152c4,0x0264664f,0xacb5ad50,
        0x947dea41,0xc8f83b90 } },
    /* 44 */
    { { 0x2325b5b4,0x79752997,0xdc8f28b8,0xda8348e5,0x4c23c663,0xf8bbb6ff,
        0x2182c92c,0x6a870887 },
      { 0xb800dd46,0xf145c17d,0x3f52f048,0x5eaac872,0x5859b9fc,0xda05888a,
        0x888790be,0x3a66e9ca } },
    /* 45 */
    { { 0x59f902b6,0x774596be,0x1c4919f3,0xc6eb3cf3,0x457c9558,0x9e379b34,
        0x554ccc9c,0x3c86aee9 },
      { 0xd9efa09a,0x3fb79ed8,0xb1a68c0d,0x1098633e,0x6b7fd4c8,0x6e8bb88e,
        0xa4c7dab8,0x0a7fccc0 } },
    /* 46 */
    { { 0x3309ddff,0x20538c6d,0x0ea5b0f2,0x80206f3a,0xb7910256,0x333fba72,
        0xab78861b,0xf80eb58a },
      { 0xb58fc705,0x58a07ab3,0xfb3578ff,0x043d1acb,0xf7eb90f5,0xcb923acc,
        0x1cb26eeb,0x251a6cf8 } },
    /* 47 */
    { { 0x850afc51,0xb58affe3,0xfb637b74,0xdc8a487e,0x57fe16b9,0x946c07b3,
        0x8d8272fa,0x2483b880 },
      { 0x1c79f6ac,0xc402687a,0xb9468ce8,0x90ef68aa,0x7a8e900f,0x077aacb6,
        0x0a82e5ee,0x47e3cd8e } },
    /* 48 */
    { { 0x47c08a1a,0x015385c6,0xb0a4c2b7,0x928d3e73,0xa745f557,0x95f60e9c,
        0xa969f6ba,0x6584670e },
      { 0x190948d2,0xc0d92f36,0xebbe384d,0x9d79c98d,0x971fa585,0x6bcc8320,
        0x36f0ceaf,0x7793c296 } },
    /* 49 */
    { { 0x6d970f51,0xf055669b,0x8d88c22d,0xe83b3c59,0x9685ba68,0x624f33f0,
        0x4a34d05e,0x9a1653a5 },
      { 0xfe134e8c,0x4e89dd5b,0xafd7e22b,0x9cda5eed,0xf2866223,0x49d8322b,
        0x8a8abfe8,0x1b43287c } },
    /* 50 */
    { { 0xdaef42de,0xcddc091f,0x43e9d6ba,0x6c113097,0x80a805af,0x3b8b1706,
        0xada919f3,0x82209792 },
      { 0x99d0b57a,0x3204559f,0xb3befc8c,0x6c27cac3,0x0abe5d44,0xa6378ef4,
        0x85374d49,0x1afa934b } },
    /* 51 */
    { { 0x73c2d262,0xf3c24004,0xc41da1fb,0x3a9f060d,0xeb52f63b,0x44a96fff,
        0x601e3c94,0xa466df13 },
      { 0x24901485,0x09ae8d8b,0xd80ac885,0xcaf436b3,0x050ed93f,0xca82f159,
        0x908c085e,0x4be695fe } },
    /* 52 */
    { { 0x344fdb3e,0xfe2e00fa,0xabeb75b9,0x5604750d,0x7f7ef79b,0xe9eba9b0,
        0xf574a15d,0x2ac3e192 },
      { 0xa5cde112,0x98b0dd56,0x93f7edda,0xddbf00ed,0xc533a370,0xb27f899e,
        0x81609f90,0x2002df2f } },
    /* 53 */
    { { 0xbc8978a6,0x74455f35,0xa66eb954,0x1d50ccce,0x9c4d0818,0xdfa4cbd8,
        0x3511ff8e,0xb52e8f30 },
      { 0xa2efeb7a,0xe6cf2b7f,0x5d526232,0x5822341e,0xd59b88e4,0x0e06413b,
        0xfaa28034,0xcf119b2b } },
    /* 54 */
    { { 0x789f943c,0x5492280a,0x71d42ef1,0xfd788b4b,0xd0dfdfc9,0x5a521b47,
        0xaf6d1a20,0x9bd24038 },
      { 0xdf050a75,0x7adad554,0x0353da85,0x72f639f2,0x988e6b4b,0x58658887,
        0x2e9d0b65,0x6ff2c2be } },
    /* 55 */
    { { 0x7aff0b43,0x51822eb4,0x5a15a720,0x9f92df89,0x32b4b00a,0xe368c221,
        0x140ced6b,0x036951e3 },
      { 0x65bea331,0x8f15ea35,0x3ce5c920,0xbf0324bb,0xc8884ef7,0xda95e3bf,
        0x27c9bcbf,0xd72c7e13 } },
    /* 56 */
    { { 0xeeee6b16,0x7f01fa97,0x40ed83fc,0xcce129d0,0x3fce79a6,0xc93919f1,
        0x96e09e84,0x8dafd0de },
      { 0xfc60c529,0xd65d9049,0x55fdb769,0x5843b710,0xa1a2cfd1,0xa6f973e6,
        0x970fa22d,0x9f0dcab7 } },
    /* 57 */
    { { 0x728aadf3,0xf9020cfd,0xc070b46f,0x376d8f28,0x31f9a432,0x24a02f31,
        0x4c77bb48,0xa9a6c13f },
      { 0xab369b55,0xe4de5c45,0x4f5ac90d,0x6cc8cb04,0x7c80e815,0x131852e1,
        0x0f679300,0x8504f355 } },
    /* 58 */
    { { 0x3a22cc5d,0xb4d3fbe5,0xdaa6bdcc,0x612067c7,0x6301480f,0x2919eb5b,
        0x6f5bafae,0x4238725e },
      { 0xd8ae2dfe,0x25af69a2,0x3dedbd09,0x992c6c3f,0xa4ffcf12,0x232e6f43,
        0x7b9206d5,0xe0ff2634 } },
    /* 59 */
    { { 0x5f6a97eb,0x23398e1c,0xa12e0bc9,0xfeec3b49,0xc1afaf63,0x2db029d0,
        0xf6b1ad9d,0xcaf10eee },
      { 0xa8f02497,0x87154e4d,0x712c4b88,0xae1a98e1,0x4ebe9643,0xf627d241,
        0x2861505f,0xca4c47ed } },
    /* 60 */
    { { 0xcee1f8df,0x35ff1959,0xeba36ac5,0xfae13dc3,0x8f4a0d4a,0x5a426de7,
        0x606db796,0x5019e48a },
      { 0x1628aa47,0xdc814132,0x5a5e065d,0x75ff8570,0x8065b511,0x89891988,
        0x513cc426,0x7880810a } },
    /* 61 */
    { { 0xab8bbe28,0xb6dc4dc0,0x0846ba34,0x5dbe49e5,0xe93bfba7,0x1abeba8c,
        0xaa1021ff,0x71c0d8d2 },
      { 0xbba1651d,0xce2cc527,0x183a2ae4,0xd328e4c8,0x6c221e0a,0x7836996d,
        0x758e1436,0x1a3181c9 } },
    /* 62 */
    { { 0x9224e28e,0x7bc381f1,0x366bb0d8,0x8b125f05,0x7e8cafd8,0xcfefc04f,
        0x063afd7c,0x5bd73477 },
      { 0x0a245316,0xccd169ab,0x9104f04f,0xac7c8832,0x3ac7762f,0xb1a61164,
        0xf0b315d8,0x4c80bb71 } },
    /* 63 */
    { { 0x63b9249e,0x07c7831a,0xbbbda95e,0xe5e0f45b,0xdf4517e8,0x9d1b6c0f,
        0x69bd1d79,0xd01cde06 },
      { 0xea498130,0x36dd69a7,0x8451ab5e,0xdaa65193,0xe4ad3ded,0x88a3cded,
        0xffc9f1b0,0x32c2a71b } },
    /* 64 */
    { { 0x202bde39,0xfb3992a4,0x3d6bab98,0x2549f564,0x87712512,0x0b564642,
        0x7fde7e50,0xd52442b4 },
      { 0xa3d3e16e,0xa6cefd08,0xc83b29bd,0x5b194f0a,0x906dec8c,0x6db0edd8,
        0x02570c1e,0x7a090959 } },
    /* 65 */
    { { 0xbfab3d26,0x04d6ce6d,0x668edf18,0xf2aa223b,0xf06250ba,0xeb899557,
        0x4940d66d,0xef6bba07 },
      { 0xb78ca345,0xb483763b,0x3f08ff72,0x15867b4f,0x5bca92b2,0x91225b72,
        0x498804db,0xccead663 } },
    /* 66 */
    { { 0x58d49df0,0x233c13fb,0x5003f43d,0x3d25550f,0x8472130f,0xf6f920a2,
        0x142c3def,0x3b9507a3 },
      { 0x697ac7d4,0x8108608f,0xbb84db98,0xfe1cfd90,0xd61853b9,0xcf2ac224,
        0x6ae3b38c,0xac6fe44c } },
    /* 67 */
    { { 0xa42c8ed7,0x9b4d14a7,0xc988a847,0x1ec02af9,0x33dca61f,0x3a6fcf6e,
        0x72852f91,0x31d28b00 },
      { 0x6eefcf6a,0xcc689bf6,0xc1c5002c,0x835e6f24,0x636c179f,0x716fa507,
        0x62bb7883,0x2ec87a6a } },
    /* 68 */
    { { 0x487bdc21,0xd7aef5e8,0x858c0310,0x626fbd75,0x08d1054f,0x8cd9250d,
        0xd0831265,0x25a65ab1 },
      { 0xfec04e2c,0x4d0ac007,0x8ddf0f4c,0x859f4355,0x031dd8a0,0xb1d58e0b,
        0x9618799d,0x9df8ab40 } },
    /* 69 */
    { { 0x43d44adf,0x4cfcca55,0x6bf2e90e,0x6ed6f695,0x1f8b275d,0xff878d62,
        0x846471f5,0x4ac00774 },
      { 0xd59b5eaa,0xe8f08905,0xc904e73a,0xf961eb4f,0x8419c14c,0x51282943,
        0x94e41d6e,0x591e7dcf } },
    /* 70 */
    { { 0xf2bad284,0xdcd90e7f,0x855fe1aa,0x6a6b30f3,0x8c15c1e8,0x8561f904,
        0x74d14887,0x3e06e031 },
      { 0xe6db2203,0x777a67b2,0xd2e66bd5,0x58db5e94,0xb65cf7b0,0x28df0d59,
        0xc6260357,0x2dab3a07 } },
    /* 71 */
    { { 0xd2792b23,0xcf33c73c,0x4a6613a4,0x1f2cfc95,0xc22cb6f3,0x1174a86a,
        0x17f30cba,0x4ae01cb0 },
      { 0xbad7d330,0x8b07c15e,0x3b414fc5,0x53295cb4,0x9201c68e,0x555022e1,
        0x92ad8ccf,0x07bce7c2 } },
    /* 72 */
    { { 0xcf71938f,0x955fec91,0x3cc010db,0x6176f044,0xd5c81390,0x5cbfa71c,
        0x724141fa,0x78040891 },
      { 0x4211fcc4,0x9d20f9f2,0x69d45611,0xf5a0c968,0x93bb5005,0xfbafd81b,
        0x0e95095c,0x7b9d8d7b } },
    /* 73 */
    { { 0x565cb6c4,0x3ba07473,0x7f738e87,0xf2fc4313,0x893003e9,0x0edefd71,
        0xce48b45b,0xce96d07b },
      { 0x45a3e43e,0x9d181f96,0xe6e75f80,0x4d1c0992,0xecf10bab,0x3651ec38,
        0x179d4a8b,0x60fa83fc } },
    /* 74 */
    { { 0xdb2f8c7c,0x965fea09,0xf767bafd,0xc0541081,0x2c0c2017,0x67da4ff0,
        0xe428da08,0x472c556a },
      { 0x7c717933,0xb85cb20a,0x0dddf8a0,0x88d4477c,0x88b0ba37,0xc36017df,
        0x2c6162d5,0x3412b136 } },
    /* 75 */
    { { 0x7a26cf67,0x602133f0,0x0f3ed6c4,0x231fa345,0x2f7819be,0xa8183f39,
        0xcc40e1b9,0xf403ddb0 },
      { 0xfd14746e,0x623111d8,0xfc2a4978,0x4ed1d1b7,0x50bde2be,0x4bc2ae2e,
        0xdd66148d,0x42cc90f7 } },
    /* 76 */
    { { 0x5471c5c7,0x2ce4232d,0x35c69a9d,0x90c84c6f,0xefed117e,0x57b5a756,
        0xdee73305,0x89a7a62a },
      { 0x1e5add63,0x1e9e8ce2,0x977005b0,0x47e20b3f,0xf61dc977,0xde442f5d,
        0xdafd1699,0xe8222d95 } },
    /* 77 */
    { { 0xfb21173f,0x13f16ab6,0x13b23320,0x7d650562,0x803dc588,0xfd35f369,
        0xb6c26025,0x1ff1996a },
      { 0x7e49ae4b,0x5932441c,0xc1d4d2b3,0xe58d8cad,0x701f9a86,0xfc26aeae,
        0x3826d2cb,0xf3043fe5 } },
    /* 78 */
    { { 0xbeb74735,0xd27c6070,0x3b016809,0x662f4962,0xffffa491,0xf2f821c4,
        0x8de08a68,0xe80d0d2a },
      { 0x5152be84,0x06478378,0x4d940804,0xe65b70a6,0x3f729581,0x5b390ac9,
        0x13b0a068,0xb39a11e4 } },
    /* 79 */
    { { 0xedc47a03,0xbe943e88,0x8163d1eb,0xdb040044,0x402cfc25,0x7673179c,
        0x858ea0ad,0xa7842fb6 },
      { 0xc3a823a2,0x69497369,0xebda0548,0x8af3d54f,0x6b2363f4,0x8975de55,
        0x707aa586,0x5e931dec } },
    /* 80 */
    { { 0x805f0ed8,0x7254de6e,0x05ad4708,0xe0ad1d79,0xa339058e,0xf3212455,
        0x834b8957,0xf176c2f9 },
      { 0x9162ff84,0x6a42a692,0xeaa628e8,0x7af37ab5,0x0da655e1,0xe6605aa8,
        0x9bce77b6,0x840eabd9 } },
    /* 81 */
    { { 0xb891bf80,0x15e2a820,0x3dcfd53c,0xf218d7d6,0xc354f5d6,0x0b3fbb91,
        0x60ec6c0b,0xd2907e20 },
      { 0x4a8c701a,0x2ba584dd,0x9f829e57,0x1edfa8b2,0xf33ce835,0x482e8e37,
        0x75b06197,0x4f8b7581 } },
    /* 82 */
    { { 0xbfbe555a,0x2be95107,0x77b3851c,0x9b76fb7e,0x318b7f27,0xbeb03148,
        0x80fde126,0x425194eb },
      { 0x2996474b,0x489a386a,0xcd1ed314,0x318df1af,0x807c380c,0xe01451dc,
        0x2a38be26,0xc0dfbdab } },
    /* 83 */
    { { 0x4043ce80,0xcc5a05bc,0x28e09c50,0x4101c7dc,0x1ab5ee6b,0xcec16f69,
        0x3f02fbec,0x6e0539e0 },
      { 0x57b36485,0xdc36e66a,0xe5c8d145,0x07d55262,0x104068af,0xae754a39,
        0x1c470491,0xc47aefb7 } },
    /* 84 */
    { { 0x48e761ab,0xc1f039f8,0xa4db0990,0xb75d923c,0x85ba216c,0xfe8fffc1,
        0x64667cdc,0x5f193c87 },
      { 0x78ed1f3c,0xdce2f35c,0x77a90887,0x82cbb59e,0x521fca71,0x0c6bb634,
        0x8d79141f,0xbf0b44e8 } },
    /* 85 */
    { { 0xc6fe11e5,0xc424f15d,0x19a25ef3,0x1e866a49,0xdbb31334,0x419ace92,
        0x2408a903,0x1bd3b441 },
      { 0xcad2225b,0x1bb62300,0xcf204b84,0x44db4cab,0xcd229aa6,0x9fcf0afa,
        0xcc492384,0x38d13bed } },
    /* 86 */
    { { 0x5e4fb378,0x7bd9a114,0xa1c8e94d,0x56be5ae6,0x2fa18b0a,0x9322de41,
        0x5aaf8696,0x983fb47e },
      { 0x28cde8ea,0xd32e6249,0x2bf0d003,0xc235267d,0x0571b4e8,0xfbc55e89,
        0xbd605049,0xd119056f } },
    /* 87 */
    { { 0xe5729482,0x9b16c659,0xf29b3b86,0x4b02be67,0xceedf6f3,0x36702e4b,
        0x6c023e01,0xf518950b },
      { 0xc01c7886,0xb2b536f0,0x093b1218,0x99704f46,0x77b68364,0x500ac8e0,
        0x9231e9c5,0x65f72478 } },
    /* 88 */
    { { 0xcbb602b5,0xb3ff545b,0xbd8413ab,0x566e5114,0x4b5d352a,0xe9aefd98,
        0x0f457ed2,0x5bae49a8 },
      { 0xf11d8800,0x07e4695b,0xfd4ec25d,0x01ac54b6,0xd2b70671,0xd6644e6e,
        0x1d8605d4,0x28bb3e5e } },
    /* 89 */
    { { 0x69044ab8,0xe7b1887e,0x5cb4f30b,0x933044b3,0xdd7b9891,0x7aa537a5,
        0xf19f3221,0x42072798 },
      { 0xc51f50d8,0x6b8297e3,0xeef90e53,0x5b21edfc,0xfe5c7059,0xcb57951e,
        0xfab581be,0x6d2d15fb } },
    /* 90 */
    { { 0x5d33b0b6,0x690e6f83,0x95d73cc3,0xbb452cdb,0x37cfebf4,0x62ebea7c,
        0x3193c9ce,0x9035b627 },
      { 0x40f4d7b7,0x5c45279e,0x28f329ba,0x799d6753,0x35fc993d,0x07bc499f,
        0x009a4c1d,0x7d579db8 } },
    /* 91 */
    { { 0x9cbe4314,0x26eee57d,0xa8584f9a,0xb5ebf1aa,0x8db21946,0xdfe924e8,
        0x6de2ed08,0x7c2f8c18 },
      { 0x62204329,0x72a56c88,0xfd970ace,0x0e5af12d,0xc3273716,0x391a62ec,
        0x8e9208f7,0x11796fed } },
    /* 92 */
    { { 0x64c0138c,0xd9c1d014,0x1ac403c5,0x0f1bc4c4,0x537f20f3,0xede9cc66,
        0xf1d4067e,0x0814c5e4 },
      { 0x8e58bd95,0xee04e423,0xfc9a7231,0xcd262e86,0xbb8fdf12,0x8a2c8b6c,
        0x81698dd0,0x772a46b0 } },
    /* 93 */
    { { 0xbb35551e,0xbb5ba56d,0x663c3ba9,0x07c04bf5,0xc13f92fa,0x2658e49e,
        0x4b0528a6,0xd8002bf0 },
      { 0x6e19feae,0xe5a5a44f,0xd32f85bd,0x5182c831,0x2f326a5d,0x7391563e,
        0x1043c6ab,0xc04b58b3 } },
    /* 94 */
    { { 0xd98d1a35,0x77cb1957,0xd2dae5ee,0x75fa1798,0xddb024c1,0x21387bf6,
        0x057d7f35,0xb3706b48 },
      { 0x0d7e2ad4,0xf2cedf39,0x25ab3e0a,0x09b70778,0x925ec8be,0x67f4ebfd,
        0xdfca4b5f,0x6ffb26ed } },
    /* 95 */
    { { 0xbae85738,0xf9524628,0xdd316b90,0x8699f4ea,0x1c6ed782,0xd8d0f110,
        0x7e60fbe1,0x4175889e },
      { 0xcc11b1cd,0xaaff3def,0x0e5e9428,0x87177ff8,0x0292d76e,0xd1cec679,
        0x87323f56,0xdbbabaaf } },
    /* 96 */
    { { 0xafe9099f,0x862696e9,0x407a925c,0x4f695f15,0x2dae1f95,0x8701f30a,
        0xf45e4cb1,0xf984c561 },
      { 0x6ebb4441,0x4fafee1c,0xfa59ad45,0xfbf96f53,0x20ba55c7,0xa530b86e,
        0x90e0423d,0x6efa587b } },
    /* 97 */
    { { 0xb7bdf0b3,0xbe355bfe,0x806394fc,0xf1d290fe,0x56c8e8f1,0xf517a086,
        0x09b301f3,0x32756a1d },
      { 0x93704c72,0x0e7e1fb3,0xd2c711e9,0x5a3ebaa1,0x936ec599,0xaea7952e,
        0x46521036,0x4493678e } },
    /* 98 */
    { { 0x525ca4c6,0xe4161f6d,0xb4c96eae,0x1b969ac1,0xc70338db,0xf9975658,
        0xa08ddf12,0xa064cc6e },
      { 0x1c73ca8e,0xdb438c3e,0xc825e7b0,0x0eeac3f1,0x4659f59a,0x874903d9,
        0x0d98731c,0x2270c0c1 } },
    /* 99 */
    { { 0xa16a8f1d,0x0c821bcb,0x8748f6a5,0xb559c2e9,0xe8991a9a,0xd7ad00ec,
        0x98fa2758,0x56cc2caf },
      { 0xb185924f,0x69a09406,0x008daf7a,0xd56e1870,0x682b81d1,0x1a307168,
        0xa6a712d0,0xb51075f6 } },
    /* 100 */
    { { 0x82da577d,0x7bf7375f,0x2dda1fa8,0xf191d584,0x0a9fbd96,0x06a73740,
        0xadc73390,0xa81aa04b },
      { 0x0627446c,0x7e77b3ac,0xb8bc08b7,0x4e662186,0xdfa62560,0x8315b1bd,
        0x619678d3,0x912ba4fd } },
    /* 101 */
    { { 0xe21bda2f,0xaa6244e7,0xcea4ad07,0x82aec7d7,0x92f8a4ae,0xa391e63f,
        0xeda9032f,0x0811b0a9 },
      { 0x0c1e7599,0xbb8c7293,0x5c36a1cb,0x02a31865,0x641883c6,0xbe014f1a,
        0x116d0352,0x98c6cb62 } },
    /* 102 */
    { { 0xa1df225b,0x331d9e52,0x7fefdd9c,0x133b0ae9,0x29f9af11,0xc003f65e,
        0xddf01433,0xad884879 },
      { 0xa4af26ff,0x7261e2f6,0x1f6ff193,0x57e94b62,0x1aca40cf,0x4640a4d4,
        0x3c5cd73b,0xbb2ca6ef } },
    /* 103 */
    { { 0x4664d8b9,0xfbdb73cb,0x32302861,0x403c2412,0x06b814c6,0x9000ce62,
        0xcd3aa1fd,0x28ad9c95 },
      { 0x1d012d1d,0xfc458583,0x5f8eef3a,0x4d784c38,0xce859d46,0x15d7456c,
        0x8fdd537c,0x2002b79d } },
    /* 104 */
    { { 0x58ff29ca,0x269a8e83,0x7d4a65f9,0xb49c4f76,0x40457f21,0x758233f9,
        0x91ca479c,0x149755a4 },
      { 0x40cdad3b,0x9f204823,0x0edf5d42,0x52efa201,0x6843c0a9,0xe0cf812a,
        0x5ee13b47,0x3e9b4d51 } },
    /* 105 */
    { { 0x1851bb43,0x58725c44,0xb1d5f4c5,0xd6ab9afd,0x4561ed22,0xcc47d6ce,
        0x44fbe7f1,0x36e92579 },
      { 0x78e47086,0x9dd595f7,0x0cd23532,0xb90420e4,0x8bd666e8,0x4eec937e,
        0x0c851ae6,0x5fda90a9 } },
    /* 106 */
    { { 0xfe3ece65,0xecd87e43,0x2e511f19,0x2c4a07ed,0x2bc895e4,0x0cef0a33,
        0x81b1b783,0x5a4e679c },
      { 0xf35bef34,0xff577167,0x7e9a98ac,0xfd949a88,0x82e42034,0xecd9b69a,
        0xe0a3249a,0x3960b999 } },
    /* 107 */
    { { 0x341a4ca7,0xb0634531,0x653c48ea,0xa97b2f74,0xe05211b9,0xfe7fcd35,
        0x2fa897ff,0x3abfb61a },
      { 0xb67a9b8f,0xc4665714,0xd4f1f720,0x77c3f374,0x79e90128,0xea8882f8,
        0xd100d209,0x2a201265 } },
    /* 108 */
    { { 0xbfd9fe05,0xf4c15d09,0x3764454a,0xbfd5269f,0x5fbcee9e,0x757375b9,
        0x30499a3d,0xd6487246 },
      { 0x0dd0e3df,0xd4aeea19,0x99b2c184,0xdba477f3,0x476f6787,0xffa9671c,
        0x32d1cbed,0x404358f2 } },
    /* 109 */
    { { 0x45ba70a1,0x88096568,0xd7c02846,0xc1025d8e,0x10e79c61,0x10070d7a,
        0xcc51d71d,0xda5545e6 },
      { 0xd36071a4,0x86100592,0x2cb84b66,0x7ccf96bd,0x9f09a3ae,0x8c04ec14,
        0xf07c45fb,0x90263635 } },
    /* 110 */
    { { 0x15a02c24,0x6c021a6f,0xb345c3eb,0xd8fd90d6,0x6346cb58,0x4deeb0f8,
        0x28c63a00,0x8e319f99 },
      { 0x3fbe9596,0xae65c88f,0x2c57f362,0xcd441226,0x77874cb4,0xb491d9b3,
        0xca29eff4,0x1a6cc217 } },
    /* 111 */
    { { 0x82b02298,0x81a498d3,0x70c81c1f,0x71934d19,0xd06009e1,0xab24b353,
        0x2a10368b,0x270bad31 },
      { 0x1acf8d51,0x4a58be03,0x96fe90ff,0xe9f0519e,0x6a2cbad7,0xf74b1373,
        0xd0501451,0x558377b9 } },
    /* 112 */
    { { 0x61f8c84b,0x0f7acf31,0x6e47a311,0xa5a72c1e,0x4373f8c6,0x16c2690e,
        0x59d03954,0xc05d2da1 },
      { 0x2c7e9247,0x70230c54,0xce9531dd,0xc29d9317,0x90f1f78e,0x9683a0ef,
        0x5053755d,0x7dd05c85 } },
    /* 113 */
    { { 0xd935116f,0x369f32c2,0x28550a73,0xf776c2e9,0xc5d579b6,0x7e449b09,
        0x217a7ade,0x2caffed8 },
      { 0x17ca913f,0xacfec3fb,0x299bdfe4,0x1b592631,0xa8bbbc6e,0x58016260,
        0xa90f5edc,0x6ab392fc } },
    /* 114 */
    { { 0x0ccceecb,0x904d2c9d,0xd0705967,0x89102f9f,0x8813ef3c,0xd12f4193,
        0xf7fe5335,0x2ec8a831 },
      { 0x736d8979,0xb60e1674,0xb00549a6,0x9115936b,0xa64085eb,0xdf4f2d15,
        0x0f72a207,0x4517fa55 } },
    /* 115 */
    { { 0xb807c6e6,0x269664b9,0xae45a4c6,0x31ef23b4,0xe3791c14,0xe2076e09,
        0x7a383887,0xb8c4f567 },
      { 0xbc149a92,0xa831e21c,0xd3a787be,0xa4e6c3c3,0xc3ffd766,0x0eb26c57,
        0x7796e8bc,0xa9f8c4f6 } },
    /* 116 */
    { { 0xc2df4bf3,0xecefcd0b,0xaca2333b,0xf34c21e5,0xdd23fb04,0xbf4bc9d7,
        0xaefa8ac8,0x8188fc44 },
      { 0x8d27e4ff,0x8f98a930,0x56de5282,0x176f524b,0x653ba693,0xac357342,
        0xc7917bc3,0x1184e8d4 } },
    /* 117 */
    { { 0x3ec27426,0x819f080c,0x314f618d,0x1bf33d34,0x05605882,0x59d87c26,
        0xbe748ebc,0x614c5091 },
      { 0x6b12648e,0xbbec1bcb,0xb1ead712,0x84575ab0,0x727f376d,0x0d567c95,
        0xd689b2d7,0xf7138698 } },
    /* 118 */
    { { 0x002936dd,0x58a15b85,0x85ff129e,0x32db35c5,0x2c76679f,0x1c85d85f,
        0x820975d3,0x1c4e12bd },
      { 0x7a93eaa8,0x8fc04964,0x63676744,0xf3aba428,0x104c293f,0x07fa73fa,
        0x988d3071,0x90c82500 } },
    /* 119 */
    { { 0xdbff4eff,0x4c8af557,0x97c3fa17,0xc63c072d,0x10949630,0x5f7276b4,
        0x2ea82545,0x34db1d0e },
      { 0xe950c2ce,0x5282e7da,0xccc61dd3,0xc0584105,0xcb48882e,0xcd364e40,
        0xc46717d9,0x62e3bc4e } },
    /* 120 */
    { { 0xf4d76e8d,0xdc9ad306,0xb922a0be,0x37e687dc,0xdffb5453,0xd06acfe9,
        0x16391951,0xc8525290 },
      { 0xcc8601a9,0x34de48cf,0x58b73373,0xc4f078b7,0x28bd9fff,0x2a3cc096,
        0xefd134d6,0x5bec709b } },
    /* 121 */
    { { 0xf4d0a639,0x4e44abad,0xfe612ba5,0xbb4c9910,0x30e58c0c,0xab2e5b41,
        0x3e800e9a,0x9a6a2fa5 },
      { 0x2ca0d01c,0xf5cc5788,0x89a25d59,0x3f8412a1,0x453fbaa7,0x4ba569e0,
        0xe0629ab6,0x9e33bd82 } },
    /* 122 */
    { { 0x61613f97,0xd4fe957c,0xf35694cb,0xb86e9ddf,0xa0a7f9c2,0x65700b9a,
        0xa789f4ac,0x349a4dbf },
      { 0x483553c7,0x836b7cf8,0xe07dff25,0xe41f0e55,0x848bb8e4,0xe71ca712,
        0xc00a7fa8,0x625b33bc } },
    /* 123 */
    { { 0xc7068002,0xbf41f45a,0x78affb63,0x9f4b862f,0xff3207fb,0x523f30d1,
        0x7212b4e2,0xaf653430 },
      { 0xbd9269e3,0x595b18f6,0x5bbb73b4,0x0ddc252a,0x2381044d,0xb59634a8,
        0xc4df1aab,0x72550c74 } },
    /* 124 */
    { { 0x4997b745,0x0f4ead41,0x80ab7698,0xab3e46c5,0x85719bf1,0xe010d55a,
        0xe7304bd3,0x0fe9667b },
      { 0x44eae3c6,0x8e112a0a,0x8a4808a7,0xd30ce0f5,0x5c32d57d,0x3fac7831,
        0xc95d0e1c,0x1e4b2152 } },
    /* 125 */
    { { 0x64a0b46c,0x9c6b8858,0xec200e69,0x6a3c1253,0xa74942ce,0xdb0e573f,
        0x257dd452,0x1ef64607 },
      { 0x89b9b886,0xb3efd2e5,0x4ef3df9b,0x2046de87,0x110a57e0,0x4b837cee,
        0x79f3139c,0xc8b42744 } },
    /* 126 */
    { { 0xecd31b38,0xfd57f4de,0x946b43e6,0x5064631b,0x3f27e71a,0x5f75a0e8,
        0x8539cdb4,0xb98d159a },
      { 0x46fc3042,0x941caf07,0x862ec3fd,0xb0e4e23f,0xfdc6a175,0x637e2cb2,
        0x3589c36f,0x52425584 } },
    /* 127 */
    { { 0x63fb7688,0xb80bee0f,0x16ad1233,0x4b03dd04,0xdeab742f,0xb2aa0667,
        0x7d622028,0x3af71b2d },
      { 0x725b4531,0x4caa50b4,0x08af5e89,0xbb4342ec,0x3c77438a,0x2b61fa9d,
        0xdb0af575,0x01d25439 } },
    /* 128 */
    { { 0xc25dfad3,0xe74e265b,0x493f44b6,0xd03630b9,0xbfd6d473,0xb3270892,
        0x1c5ee992,0x5b2d9543 },
      { 0xa36f7c5f,0xeeb94537,0x8ab0b81d,0x9befc01d,0x188b45e5,0x483cdb08,
        0x01e4648b,0x44c753b7 } },
    /* 129 */
    { { 0x924195ac,0x779ee42d,0x0cec6c21,0x44ccd6a0,0x211bd343,0x1a0df86e,
        0xa7fc826e,0x2f73a627 },
      { 0xdd4b2fac,0x179c9d7c,0x65a3f70b,0xe09df4b3,0x63270b3d,0x169b58ea,
        0x57217f02,0x5934a0a0 } },
    /* 130 */
    { { 0xf471c90d,0x488905bf,0x30de94b7,0x2fe5dcf5,0x8218ea8f,0xef436698,
        0x79e5558f,0x986125e8 },
      { 0x2ce9c497,0x2e59c17a,0x1ddab4b1,0x8131f0e2,0x20035218,0x408daea7,
        0xd40469e4,0xcd71798e } },
    /* 131 */
    { { 0x0fe2e160,0x3c3fd652,0x05bcf84f,0x569f8123,0x5151f451,0x022bf0e9,
        0xac2845ec,0x054574f4 },
      { 0xd524a547,0xbb17853d,0x33d6e7b0,0xbf1b6f27,0xd4d10a83,0x5d71af25,
        0xe8ae37e7,0xd4cfa938 } },
    /* 132 */
    { { 0x843e3cb6,0xda39e364,0x61812528,0xf259a38d,0x57862e0a,0x94912e51,
        0x2e978c13,0x8142ba4a },
      { 0x244620d5,0xb8348db9,0xa46c8074,0xe67f9053,0xa1e6346e,0x21ab9bff,
        0x64f1b73d,0x04415770 } },
    /* 133 */
    { { 0x74019e33,0xd4355d58,0x18e26d25,0xdb1c1b22,0xea91876f,0x9a39a7d6,
        0xef2d83fb,0xc1d29df0 },
      { 0x9cfaf04f,0xf2378120,0xc33a65ee,0x5ca4b4bb,0xc5364c6b,0x529e4d14,
        0x0b9c3666,0x9cd549d0 } },
    /* 134 */
    { { 0x0d561bbc,0x7dacb824,0x753ced32,0x7c7c2fd1,0xf3afb037,0xd9774757,
        0x0d6e3a55,0x213fe371 },
      { 0x50d4f212,0xa6d3d8d5,0x98665a38,0x674c0a81,0x4f2a518a,0x112e0ed5,
        0x8f902353,0x1b995abf } },
    /* 135 */
    { { 0x0f049d2f,0xa06b8d22,0xeea425af,0x415763b2,0x8051b012,0x027b304b,
        0xef51bae0,0xb8cdb43f },
      { 0xd7109f5c,0x492e11fe,0x7298d02f,0x0b57be5d,0x634f9a12,0xeeda24c4,
        0x1592d326,0x0b0aab29 } },
    /* 136 */
    { { 0x1d0ad6b2,0xa4a48c8d,0xde384635,0x3b996e4b,0x19b7e324,0x09d5a0fe,
        0xefac055b,0x5847aae5 },
      { 0xa0c3770e,0xf6b1627f,0x6fc34e82,0x37cb2670,0x6c0ede62,0xfdcb37fb,
        0x2a34e059,0x4e41298d } },
    /* 137 */
    { { 0x9a3b63ad,0x84b04e36,0xbc323063,0x8353ab53,0xc0045b9a,0x06987eca,
        0x46f45828,0xb461ba88 },
      { 0xe5943ccc,0xd37ef067,0xcdc4de91,0xe5d36625,0x024ac769,0x4f72a9d3,
        0x3c8e2b9d,0x0ad61f17 } },
    /* 138 */
    { { 0xb5c95125,0x5114fdc8,0xc9341981,0x57637b86,0x39b74fc0,0xb66786bd,
        0x230b7e41,0xc9e138be },
      { 0xde050283,0x0bc6d5fe,0xd609a03e,0xa7c743a3,0xb1ae24f0,0x1233df12,
        0x57db9668,0xb2ea42ec } },
    /* 139 */
    { { 0x1363c862,0x9f9b8840,0x39a4b717,0x9a850b30,0xf87a216d,0xaeffb727,
        0xb3d99a0c,0x754cb279 },
      { 0xbade742c,0x046e6946,0x3b3ea466,0x05669a4f,0x23aa2b1c,0xc64392ba,
        0xfd714fe1,0xa218279d } },
    /* 140 */
    { { 0x235b46aa,0x4203d984,0xe219d5a2,0xb35f0c71,0x3c5ba535,0x93a429b2,
        0x9111aaca,0x7eefbb77 },
      { 0xc45d8760,0x67b99023,0x3ce39388,0xa0f78654,0xdbf34ec0,0xaafb1901,
        0x2dced638,0x49498c8b } },
    /* 141 */
    { { 0x99e4ef46,0x94f5cc8a,0x0ef0d4b1,0x3321e667,0xffb89f14,0xdb2d0224,
        0x9d069a20,0x9bf74803 },
      { 0x4f1c1f1e,0xa64d6b13,0x2162dd15,0x1ab10285,0xa7742325,0x7c7f6a09,
        0xc823efc1,0xc5a9082d } },
    /* 142 */
    { { 0x3d087141,0x393fb679,0xfbdb7ff5,0xe872932d,0x4ba6c9d3,0x21bff1a2,
        0x97ad760b,0x3193dea2 },
      { 0x10c7e145,0x0ae5a741,0xb18493bf,0x9e7cf429,0xc871111e,0xa0a3bfa1,
        0xda10cf39,0x322f34ea } },
    /* 143 */
    { { 0xee32db92,0x482375dc,0x416f8eb4,0xa7e02d01,0x004ba196,0x224fb2c1,
        0xc6488715,0x165f5f16 },
      { 0xd1125e78,0x4cad71bf,0x37d5cc46,0xf7a1b1f4,0xefd065af,0xb54a9fe1,
        0xdbfbe5e7,0x3a954eb0 } },
    /* 144 */
    { { 0xff76620a,0x45f4a643,0x18233034,0xdb839133,0xaebce0ab,0xb777abee,
        0xb961e3d8,0xe610ded6 },
      { 0xd7bc0322,0x848f85dd,0x05bcf887,0x64dec64f,0x85d3ed98,0x32f43df0,
        0x0af94bf8,0x2e150e9a } },
    /* 145 */
    { { 0xc7de998e,0x5890c658,0x3509373d,0xc418a43a,0x7d290312,0x04661baf,
        0xd4f3762a,0x87a24bda },
      { 0xcaf8e73a,0x3a46493d,0xa475ba0d,0x694bce49,0x1fa35fe6,0x9af7566e,
        0xd7bc94ac,0x3ee19601 } },
    /* 146 */
    { { 0xdfb0faec,0x5bf209ee,0x8a6ec977,0x514ea871,0xd04a9727,0x95b71f0e,
        0xdb496313,0x4650bc76 },
      { 0x58184292,0x22cc758d,0xec9aceab,0x152d43f9,0x091f0bb7,0x4b47606e,
        0x1b7d4e79,0x6da270ef } },
    /* 147 */
    { { 0x935c7726,0x4ee7022b,0xd1af2fac,0x2f7e7bb7,0xfdf9e72f,0x55a2f594,
        0x14b8b2d8,0xedf46a30 },
      { 0xcdc3292f,0xe5fba600,0x58c6f6a4,0x04b54a3a,0xb023369e,0x1263dc16,
        0xbfc3a1ad,0x0ac721dd } },
    /* 148 */
    { { 0x27351b84,0xe62e1d91,0x4dba475b,0x5c99d239,0x567c9219,0x6cafe0d0,
        0x5418e29b,0x8db1ed2a },
      { 0xe729b5e4,0x36d4e136,0xed502494,0x0c714c79,0xf4809507,0x20d538d3,
        0xb0b20279,0xc187d5fb } },
    /* 149 */
    { { 0x51ad0a16,0x68ca10ce,0x679b7804,0x3150db24,0xbb25aa04,0x0e9496a5,
        0xac090e22,0x71237e21 },
      { 0x8454f658,0xd3911b2b,0x99498743,0xb4cc8be3,0xe6a6a08e,0x3eec8fba,
        0x89d40596,0x32302505 } },
    /* 150 */
    { { 0xad144097,0xe898b046,0x24c88b1a,0xc5ca6ff8,0x8cf479ae,0x9d01b59b,
        0x92115900,0x5ecd93aa },
      { 0x61716de7,0xf4b4b1d8,0x58d641b5,0x187b1e07,0xca3f3a12,0x3c6948c5,
        0xee7e1518,0x3841240c } },
    /* 151 */
    { { 0x69f16249,0x7d5bc16a,0xdddb1510,0xaa932350,0x76d23cc9,0xe5df5104,
        0xbb0900eb,0x2f2a1306 },
      { 0x699413cc,0x9fdf3047,0x26394d94,0x71f3cd30,0x59396461,0xad22fa8c,
        0x469fbffa,0x6c6253bc } },
    /* 152 */
    { { 0x1e33c180,0xb79fbc3e,0x615e3e38,0x754fb963,0x37111e5e,0xa3a40838,
        0x49f757bb,0xd8780e04 },
      { 0xe545fb38,0xbb941a11,0x55d54231,0x227ba21b,0xcfcc068d,0x5d80da73,
        0xe600e277,0xd3b0557b } },
    /* 153 */
    { { 0x595a7415,0x286524f5,0x657a5920,0x1e8dcdfc,0x1477845c,0x04d7efa9,
        0x17d2b3ba,0x86bd1af7 },
      { 0x06b56786,0x08e833c7,0x028130b2,0xff007b61,0x6e05001d,0xfcafe082,
        0x37fe292a,0x41556b55 } },
    /* 154 */
    { { 0x0baaa8ff,0xfddd3819,0x45bc51be,0xd916d17b,0x6a86f8a9,0xf981a07a,
        0xb2c36491,0x23111568 },
      { 0xda2059ab,0x51628fa0,0xa2f34fea,0x62537ee8,0x30d7894c,0xf34ce38a,
        0x967e567b,0xc464b9dd } },
    /* 155 */
    { { 0x6fd5fc85,0x0e4e5592,0x9d5e3741,0xcccec5e9,0xf835d025,0x3c297ade,
        0x1250825c,0x40e40ff8 },
      { 0x1953cfa2,0xd4120ecf,0x05e32613,0x295c5b64,0xee8fe373,0x0eb531c0,
        0x7ea315fc,0x5c4d2470 } },
    /* 156 */
    { { 0x918fd269,0x73543946,0x7c10b8ee,0x61cd97dd,0x5fcf9bb7,0x5f88e781,
        0x4cc5a4a7,0xce83e70e },
      { 0x7d845599,0x4891847f,0xe052a4ac,0xb1a2b373,0xf6932c5d,0x6996b90e,
        0x81227964,0x4e53f370 } },
    /* 157 */
    { { 0x55856253,0x2135b8eb,0x47b465f5,0xba19ee8b,0x1b8090ac,0x8e2b91a1,
        0x7857ed6a,0xf80bb6bf },
      { 0x73d12c59,0x0a813661,0xc74599e6,0xa75a8e11,0xcda2a2df,0xad08ee3e,
        0xc87ac463,0x70d54102 } },
    /* 158 */
    { { 0x49af46ff,0x6736584f,0x2f98bce9,0x096d00ef,0x4e133b91,0x77f01942,
        0x5f3904eb,0xd10b349e },
      { 0x80429c3b,0x96131a13,0xf0fabf71,0x479ab882,0x78a64ffe,0x40a22cde,
        0x1952c3cf,0x165920d3 } },
    /* 159 */
    { { 0xfc086dd0,0xab5f1c1a,0x12956035,0x07063e85,0xc5a58ddc,0xfe92b742,
        0x0cd4d60f,0xa58aeb14 },
      { 0xef78f77a,0x975f3323,0x66687342,0xf31f2912,0x6a031ece,0xd92b874a,
        0x554dab9a,0xf1b36156 } },
    /* 160 */
    { { 0x4396accc,0x2ce9fa74,0xf00e49e8,0xef9c4a79,0xe6694bee,0x9c32ee8d,
        0x0e8f785c,0x6fba4bbe },
      { 0x78a65c2c,0x65fa8e03,0x18cb8f40,0x7ac38e69,0x6b188e1a,0x24f743ab,
        0x56eb3ec8,0xc39006b4 } },
    /* 161 */
    { { 0x732d3604,0x519ba583,0x0b6b3459,0x9bfeb481,0x120f4fc5,0x1897d0c9,
        0x4a7b2350,0xde080cba },
      { 0xa7d2b287,0xb8bd8414,0x3f4fd647,0x8a78b72b,0x45bb0427,0xbfa1061d,
        0x75940cf8,0xe6f95dae } },
    /* 162 */
    { { 0xf0bade5d,0x1cb29b49,0x43f806b8,0x742025f6,0xbc73ee16,0x890214ea,
        0x4e9357a8,0xcbbacf13 },
      { 0xd4970cf8,0x71b32714,0x433f00da,0xec4f8e50,0x178913cd,0xa92b3b9d,
        0x630520e3,0x892fad97 } },
    /* 163 */
    { { 0x02648f13,0x5fa5194f,0x27b6be01,0x169f296c,0x5709091b,0x7971c34d,
        0x01ca703e,0xc4390edc },
      { 0xf36dac3a,0xba5e8745,0x8cd0c336,0x25a85d73,0x1fd290ae,0x25af152f,
        0xccc50dc4,0x9fa06153 } },
    /* 164 */
    { { 0x61604b75,0x4ada778c,0x9e803317,0x61e46463,0xa5819084,0xbc7f3a0a,
        0xf3616fee,0xb4f2a6ba },
      { 0x540da7f8,0x482bafb8,0xf4d6225a,0x9fd559cf,0xa1c5e50e,0xa0f1d758,
        0xe872b407,0x35c216e7 } },
    /* 165 */
    { { 0x04a1c7e2,0xace013fc,0xa946f3ff,0xc6990d5c,0x783d06ac,0x71dbec40,
        0x43eb15b4,0xe30a6d85 },
      { 0x94673fea,0xdfed7d42,0x7c17e5f0,0xf3191fb4,0xbde2e1b0,0x091f8e0b,
        0xd38b269d,0xe4ef3600 } },
    /* 166 */
    { { 0xa4f41f17,0xae114bc7,0xcfa30c21,0x9279e404,0x0f5c1e5c,0xfa5eb205,
        0xb881c925,0x18722e9f },
      { 0xbc23bf33,0xff8d7a37,0xa01c1056,0x1d5cc75d,0x879bed47,0x38b6e7ed,
        0x8eca3e56,0x1aae4f6e } },
    /* 167 */
    { { 0x690e1ed5,0x60a4895b,0x39da8dc3,0x391a0d0c,0x5f566fa4,0xfa6239a0,
        0xdd56c22d,0x5d1bd75b },
      { 0xfdab28fc,0x3024adae,0x80d52bcc,0xcb81fe0a,0xdebbfdb1,0x0b8947a6,
        0xa0b673a1,0x727d4cc2 } },
    /* 168 */
    { { 0x661e7a89,0xfa39ed48,0xffaf4d15,0xbbabf22c,0x694fb83e,0x25e4c308,
        0xabd08906,0x1082cd04 },
      { 0xdfcf1eee,0x6fa4dfce,0x7ce8427f,0xb1f0e4df,0x73533d4c,0xa6d9bcbf,
        0x973e175f,0x1cc91dfd } },
    /* 169 */
    { { 0xa0d41758,0xf8ec2fc5,0x7783739c,0xae5419e3,0xa3526559,0x1654d7dd,
        0xefd85eef,0x75dde554 },
      { 0x71da8cba,0x8760accb,0x91e56cf0,0x485d4ba1,0x81d8f13a,0x81e62034,
        0x8522fcfd,0xf4b5c1eb } },
    /* 170 */
    { { 0x50dd7082,0x4c3973ce,0x708c6f26,0x2bae6a23,0x65af6483,0x2f88f446,
        0xe21be208,0x25a78b5e },
      { 0x908c8150,0xe66c29cc,0x98fd5ffb,0x9829b616,0xadc66028,0xc04624bc,
        0x1a199b00,0x505f9561 } },
    /* 171 */
    { { 0x59dabf11,0xd523f418,0xbc4d2d5b,0x570f20ac,0xf790e997,0xd2ce247c,
        0xd574992a,0x85fa298e },
      { 0x4b273bd3,0x62eed5f3,0x765f65a5,0xfe8b6af9,0x03f38d8a,0xfb2f462a,
        0x057a67be,0x5f6122f4 } },
    /* 172 */
    { { 0x5b5100cc,0x124d731e,0x39d4313f,0x4f7860a7,0x1120c638,0x3d829330,
        0xc64e5ad0,0x0b9786d4 },
      { 0x23985e90,0xaca427c0,0xc889b882,0xdbc70c00,0x61d4f290,0xa292ff81,
        0x5b2dda0d,0x970f1f5a } },
    /* 173 */
    { { 0xfb1d91cf,0xcd1ff2c3,0x19aa012e,0x6d278412,0x229e18ee,0xc9d1cbd6,
        0xa80f4762,0xa815433e },
      { 0x8e920554,0x83ed4b4f,0xd0aa369b,0x1d3f0c45,0xf7a905b0,0x17275152,
        0x1ab9a60c,0xf1a03dd3 } },
    /* 174 */
    { { 0x48c26023,0x92c10eda,0xaf3927c8,0xb2227c50,0x68916b9d,0x1cbe20e7,
        0xa602f95a,0xcfd53e67 },
      { 0xa0130dd5,0x3cdc9993,0xe4cbe0fa,0x9bb6f3cb,0x8aa67f6e,0x4d2daa7e,
        0xa206ba18,0xf626df7e } },
    /* 175 */
    { { 0x56c08f54,0xff053d4a,0xdfd00c53,0x8cb873cb,0x8cca3d25,0xb49844d1,
        0xe113ea68,0x58257196 },
      { 0xd26f6bdf,0xa0e29282,0x66135148,0x7621dc6c,0x148a385a,0x057dbc3f,
        0x9b26e1b0,0x49badc07 } },
    /* 176 */
    { { 0xc47731af,0x353b2df7,0x7b9a1f37,0x767106a5,0x76a16fa4,0xd5fe65f7,
        0x1c39003f,0x4d65eb8d },
      { 0x0e6d9389,0x7d1702fb,0x49099879,0xbf49d246,0x4e4d0c8e,0xa84e2ff3,
        0x44f06e64,0xbdbc3773 } },
    /* 177 */
    { { 0x40209fea,0x150219e0,0x6286c965,0x56e604b3,0x48a4e72c,0xf118efad,
        0x294b0883,0xc6f889c8 },
      { 0x8e7e0c57,0xe4c8d164,0x23d600ab,0xa92c6a2a,0xfedb4278,0x24dd2751,
        0xd93e34ca,0xffd8a7e1 } },
    /* 178 */
    { { 0x160722af,0x2d2627ed,0x28bf0d0f,0x3c8b8102,0x8ec4d61c,0x6eaf4d9c,
        0x2c17f2cc,0x1b4baff5 },
      { 0xb4594092,0x4f5a3e23,0x7d829bf5,0x14b4a245,0x5a5a4222,0xfa5ee05e,
        0xec0fe001,0x03a0d850 } },
    /* 179 */
    { { 0x69ade883,0x9a31d6c6,0xd7fab9b5,0x9d49c856,0x0c61b5ac,0x578ab41a,
        0x332350de,0x7e4f2902 },
      { 0x196ac4bb,0x719bd4ed,0xafcea98d,0x71c88e05,0xac85a02c,0x5b441bbe,
        0xfa018e8e,0x4132c66d } },
    /* 180 */
    { { 0xbd80c757,0x86242d5c,0x3966b1a6,0xd3423fed,0x92e7fcf4,0x5d0ad4d6,
        0x4a79f3f0,0x545bb52a },
      { 0x2037745a,0xa1222634,0x5c9a47cc,0xb58d29fe,0x2140baad,0xccda9827,
        0x76c769a3,0x603e39d3 } },
    /* 181 */
    { { 0x67c3d4aa,0xae9a6ec3,0x08bef96f,0x444f55d1,0xd664d0a8,0x50996abe,
        0x608613aa,0xa44601dd },
      { 0xba37b00a,0x076256f9,0xea4489ca,0x9d9f730a,0x8f356781,0xe8e1af33,
        0x1b0c9ac2,0x9da72c5c } },
    /* 182 */
    { { 0x8056721f,0xa5480cd2,0xcd67f6a3,0xf8ba48e4,0xdfdbf0a9,0xc8dc6652,
        0xb7e1edac,0x3d7064af },
      { 0xa309625e,0x4454ea36,0x896c1810,0x026a0223,0x87e52615,0xe9f50011,
        0x3c3d703b,0xf7a1b253 } },
    /* 183 */
    { { 0x6194a9a7,0xf4adfac6,0xec1c3185,0x31a944e7,0x40a0ea46,0xfde9ce81,
        0xabf635c5,0x16a7b783 },
      { 0x87106be1,0xcf49d624,0xbaeedd58,0xf1108156,0x65e3b59a,0x53bfdc63,
        0xc0a7c900,0x89acded0 } },
    /* 184 */
    { { 0x9c0c7c04,0xa6eb380b,0x9f01cc9c,0x23007cac,0x285b6c6e,0xc4ddfb2f,
        0x4d2fe7ad,0xbcdc7f51 },
      { 0x4a8963d2,0x42bc6534,0x27b55dd7,0x2fa0bd5e,0xd8e79874,0x7e493fb2,
        0xc84bf937,0x17108a6c } },
    /* 185 */
    { { 0xa0ae33b0,0x8f8d2e9c,0x0e3cd053,0x403cc766,0x20587996,0xf7816585,
        0x69c8fab6,0x0f662d56 },
      { 0xd4e35be1,0xfae35eac,0x6ab0035d,0x5ff47201,0xc783bcd4,0x4cdb6ea1,
        0x5247a9d5,0x3ad2e46a } },
    /* 186 */
    { { 0x962b769b,0xf066bef1,0xba79d9f3,0x1834fec5,0xcfe70b11,0x0c3d474b,
        0x181455de,0xff3146e6 },
      { 0xe9fda5a1,0x90b4292f,0x29e22976,0x100d540c,0xaa2df711,0x041186a3,
        0xf3bc2117,0xcfd8a211 } },
    /* 187 */
    { { 0xa4e1e3f9,0xabaa164c,0x5076c4ec,0x0ffc5d4c,0x29715425,0x8d6a7646,
        0xd9ecd358,0xd50913ea },
      { 0x37f9e5ba,0xa39841d1,0xa756c925,0x6a90abfc,0x335855ad,0xd29c4f84,
        0x90bee210,0x3a8a3ffe } },
    /* 188 */
    { { 0x82775465,0x20529ea2,0x05de46b0,0x96bd3965,0x6fe0203d,0xeafdf757,
        0xb849e1dc,0x033709f7 },
      { 0x7440bc88,0xd990f262,0x562bda86,0x19fd98da,0x1b3ab664,0x6f609080,
        0xee05d54c,0xe39bc8f9 } },
    /* 189 */
    { { 0xb7fee211,0xba63d7d0,0xcc72f995,0xe5cfd677,0x3df5863d,0x5e64ab10,
        0xdc863619,0x2e6ad6bd },
      { 0xdeffbe49,0xf91e115f,0xbb1c3c09,0x154edfcd,0x0be68cfd,0x5fbc8d3b,
        0xb13bc1ec,0xdc5630bc } },
    /* 190 */
    { { 0xa9924c34,0x85f93624,0x2e11428f,0x8478bfd7,0x47f9defd,0x8149f857,
        0xf509f993,0x0610508b },
      { 0x513724ea,0x419ebe1f,0x725c8b24,0xcff020a1,0xa72bddfb,0x94f36584,
        0xbbec1038,0xaec05fd5 } },
    /* 191 */
    { { 0x9b77bf82,0xebfcb170,0xbabca0c3,0x19147831,0xdd409ac7,0x33fee22d,
        0x511f8112,0xc370cff2 },
      { 0x4151c5be,0xe023d298,0x2ef5ec6f,0xf1097e8b,0x3a09fbcb,0x7907a2bd,
        0xbbfa1899,0x7e8f0a83 } },
    /* 192 */
    { { 0xda638608,0xcc2f2cf4,0xe7b68ac0,0xb2144397,0xdb95ff63,0x7f18bf77,
        0x39846917,0xd0bf3e2a },
      { 0xa7315aff,0x4105e86e,0x2f3bf9e5,0x65a0a552,0x92351199,0x3109f61c,
        0xc464d33a,0xf0119421 } },
    /* 193 */
    { { 0x6fb23d10,0x051330e5,0x8ea63c77,0x96026edb,0xe9cbfade,0xf3541172,
        0x873c8b97,0xea56376a },
      { 0x44d8110b,0x7f40793d,0xc6beed1d,0x0779b1ec,0xf5b721c4,0x6c03806e,
        0x4203d666,0xd2827a00 } },
    /* 194 */
    { { 0x3c0f3250,0xe63eca28,0x0fa8aef9,0xb430c96d,0x68c00b3c,0xc9b9cb9f,
        0xc38645f9,0xefba8043 },
      { 0x13d1e454,0xbe5e077b,0xd2ee51af,0x994033d5,0x3c3aa41b,0x3790fdae,
        0x6458b246,0x66714c6e } },
    /* 195 */
    { { 0x924fb9f6,0x8ee9f742,0xec8a9cb8,0xac369983,0xb0a4f49b,0x04285109,
        0x4c550017,0xca5a01f0 },
      { 0x6442c569,0xc36d0e51,0x207a07e4,0xc58b3059,0x3bc85b18,0xa9755fd7,
        0xcc2190b3,0xda0e7c16 } },
    /* 196 */
    { { 0xd0bf8406,0xc1b13cf6,0x0af68e16,0x48d0f360,0x839ca656,0x1c054718,
        0x5a41a48f,0x0ae2237a },
      { 0x11f0d902,0xefdc6797,0x419ea87c,0x13ac5bd1,0x6f0677cf,0xe069d8cd,
        0x3016d453,0x42b06a0b } },
    /* 197 */
    { { 0x6f4e1f14,0xdb427c88,0x0ace79d8,0x0b5ab225,0xd8c06c52,0x6326177f,
        0x31c37cd9,0x99a08f02 },
      { 0x13aa5906,0xa81d31ab,0x4dd755b0,0x001f4759,0x9c8da586,0x8b56793f,
        0xcec64d25,0xb99c3583 } },
    /* 198 */
    { { 0x6ae869dd,0xfdd184fa,0x44d4becb,0xa3bf5ff6,0xa0bb9801,0xf1763825,
        0xfabf79ac,0xca93f5ab },
      { 0x0ab2c9c7,0xba7dfd23,0x2e90ea27,0x46430857,0x37bc97d5,0x96923173,
        0x1c2b8297,0x955dca02 } },
    /* 199 */
    { { 0xb2e176c2,0xccb8f40e,0x074758c0,0x384a64e1,0xd2422f90,0x62cc8b9b,
        0x8d32e31a,0x0462a779 },
      { 0x53aa56f7,0x683e1ec5,0x67bcf05d,0xb40bb0ba,0xb09ea3bf,0x12f21d32,
        0x9bb58b02,0x7b5c0a3c } },
    /* 200 */
    { { 0x19486bf4,0x7f6b288e,0x221d922e,0x40ba6178,0xdc3358f7,0xd1bef20d,
        0xa3730105,0xebea60f6 },
      { 0x1762e27f,0xeeb79c28,0x39fa2505,0x7659eac5,0x4487bd90,0xf495d602,
        0xff797c5b,0x7b6d4af5 } },
    /* 201 */
    { { 0xbacaa0eb,0x2202cbf8,0x796b8656,0x84547e98,0x81e01a8a,0xb66b87a9,
        0x933d78ee,0x2755125c },
      { 0xed33f8cb,0x684555d4,0xe2e677f8,0xf1de0cad,0x51a1e9ff,0x0ee5ad53,
        0xf98ad35f,0xb34315b3 } },
    /* 202 */
    { { 0x131cd75d,0x7a64eb13,0xcb0e3be2,0x91f74f35,0x2399ddf3,0xe4145003,
        0x0dffe5a0,0x371b8671 },
      { 0x682d0f80,0x769c13f4,0xa5dbd72e,0x24381abc,0xdb9a531c,0xe21a333c,
        0x73f60abd,0xaeddc99c } },
    /* 203 */
    { { 0xb5f2259c,0x5cf49e69,0x044a6413,0xb0498616,0x55d0a46e,0x510e2451,
        0x6e27da21,0xd83c7ca1 },
      { 0x635891b5,0x07bde6d2,0x9ebf3102,0xdf518788,0x8c069792,0x0a99d520,
        0xcdf92014,0x47202f65 } },
    /* 204 */
    { { 0x2f443a32,0xcdb47bff,0xd8e7a6c0,0x9023bc64,0x62a9e45d,0xf6b48ca5,
        0xfd7737dc,0x3ad3dfce },
      { 0x4b805be2,0x3782fced,0xeb1b5ad7,0x3c062ece,0x0059b736,0x3f59fe86,
        0xa36c46ae,0xf7cedd0b } },
    /* 205 */
    { { 0x433b78c5,0xbb15e367,0x9ff6a006,0xa2371907,0x15bc7d71,0x8f3d622d,
        0xfa1fc090,0x525c2ed4 },
      { 0xe68d4b0f,0x93a3073a,0x10fe1959,0xdf19b8c2,0xe47ac5a5,0x28faba36,
        0x18a7ae11,0x2da6d62b } },
    /* 206 */
    { { 0x5629d133,0xa489b3bb,0xad127129,0xf9f09b94,0x7082982e,0x53b7fedf,
        0x8d2beb9d,0xc5573373 },
      { 0x5cb75589,0x847a38e5,0x5f665eef,0xcb7bbdb0,0xae3c259b,0x641fdfc9,
        0x57705d8c,0x80e34ca1 } },
    /* 207 */
    { { 0x001ef72f,0x609c29f6,0x678789b2,0x60ffe037,0xfde15530,0x700ceefc,
        0x2aa8ac3a,0x98199469 },
      { 0x41ca3125,0xc39aa064,0xbc0c9a94,0x3e9f504e,0xff861068,0x2c613728,
        0xa442d6f3,0x5951fcb4 } },
    /* 208 */
    { { 0xb97e8fce,0x7e9b2251,0xae42fa93,0xa5d521c5,0x7a79f665,0x5c73d3e3,
        0x1e7c1843,0x929a5916 },
      { 0x2453f77a,0x308733ba,0x808bd44e,0x20191c84,0x24b263b2,0x17f9f06c,
        0x27503ac8,0xfffdcd9a } },
    /* 209 */
    { { 0xfa2e3d35,0x97845355,0x2deaba0a,0x2f9fa6fc,0xea11a38a,0x82884be4,
        0xfc779866,0x38ceee09 },
      { 0x565550ee,0x91f38305,0xc2090b67,0x037d2469,0x5bb97c29,0x612d5589,
        0x3ffce185,0x45a8c6a7 } },
    /* 210 */
    { { 0x948986b4,0x43e991af,0x22500ec1,0x0c39d148,0x9e7de923,0xd93c272b,
        0x9690f4de,0x219e1386 },
      { 0xaa62b42b,0xbc0282bc,0x84e8bc91,0x78d26196,0x478144e3,0x143930f4,
        0xcc913d8a,0x5ec12735 } },
    /* 211 */
    { { 0x92dd1b0d,0x00e8510f,0xcbc479cc,0x8fa55634,0xde583ebc,0x6585d80a,
        0xdb09af4f,0x3500e41c },
      { 0x8edc1c6b,0x79791727,0x69973edf,0xaa6de3b5,0x13ac36f2,0x03c5e9cd,
        0x6c77a697,0xc274afcc } },
    /* 212 */
    { { 0x3c423efc,0x998788ad,0xb7ff9bf0,0x22c6a751,0x8fe82e4e,0x7a11b0cd,
        0x0c8c45f9,0x7538db2b },
      { 0x56d33e22,0x964e5fa8,0xbb0e5708,0x319d22e3,0xc57dfa92,0xc67e4321,
        0xfa2e0a03,0x465b5b2e } },
    /* 213 */
    { { 0x1248e296,0xaf90b237,0xe125ba03,0xf7e7ff34,0x7b58f21a,0x673bf50e,
        0x2a5646a0,0x9613120d },
      { 0x35fa20a4,0xed2a3ec5,0x815b674f,0xffc2f510,0x0917c28c,0x217b49a8,
        0x63e90143,0x5febff8d } },
    /* 214 */
    { { 0x883048a7,0xe180bad9,0xde2fb311,0xedf0d76f,0x42f10918,0xf22f60ff,
        0x017e4056,0xd9a441c6 },
      { 0x4c2ad962,0x1b5b00eb,0x9ccf4c87,0x0e301d8e,0x45f8f97f,0x557f614d,
        0xe0f1e478,0x6cc18f2e } },
    /* 215 */
    { { 0xf78b96ab,0x48cc01d7,0xb47e0f8e,0x1ea8bdeb,0xeffb8a4b,0xadca92ff,
        0x77438be4,0xe998d32e },
      { 0xd4e6087e,0x09942eb0,0x6b241876,0x3fbc2255,0xacbc1c48,0xaa2ec237,
        0x5732e76d,0x9aecd930 } },
    /* 216 */
    { { 0x958b5d43,0x5667d9b8,0xe1eb773b,0x07bf1898,0xbf548b86,0x851a6cd8,
        0x42d6b46d,0x242d8422 },
      { 0x7b655c2f,0xd50ba08d,0xcdf7c978,0x2278910d,0x306b780f,0x9d5bfd7b,
        0x6e301873,0x6ca437e0 } },
    /* 217 */
    { { 0xf9feae4e,0xd7c265cc,0x997592a0,0xbdd4bd75,0xe86249e4,0x518ae1d2,
        0xccb06028,0x5909fa1b },
      { 0x5746eb81,0x7a2f9659,0xdc812fff,0x409d2993,0xb0abaf4f,0x031ad114,
        0xe531fc8f,0xe0a7eced } },
    /* 218 */
    { { 0x201217cc,0xdd20de76,0x553cec6e,0xc9a48c60,0xcf672846,0xbde5f1df,
        0x003693df,0x957ce106 },
      { 0x067c0809,0x02592916,0x03a61c6f,0x2bcf52dc,0x7e8aa527,0x8acdfba6,
        0xb7284b11,0xdad8f454 } },
    /* 219 */
    { { 0x6aa83bd4,0x442f3af8,0x8338a645,0x415a0e0f,0x9690dd50,0x87689c92,
        0x862826f0,0x7a127cc0 },
      { 0x93e33b5a,0x48290cb1,0xab75c410,0x124d399f,0xe0a845c4,0x1653bdac,
        0x72cec15a,0x2cd18196 } },
    /* 220 */
    { { 0x676a8a56,0x8f4023c9,0x78d282d5,0x0c90e99c,0xfc6d6b1c,0xe4bea5a6,
        0xa89ce402,0x6cf1b326 },
      { 0x1046702d,0x066b1dd2,0x252ac152,0x5fb766ca,0xd24182b6,0x6c678ab5,
        0x8b18042c,0x9fc95746 } },
    /* 221 */
    { { 0x387f9611,0x49efcb21,0x88404b43,0xff2d2507,0x1c7526c6,0x55590cd9,
        0x58e86a73,0x90a22fc3 },
      { 0x9ce2f640,0x6f7bdc00,0x04d6346a,0x92fbae71,0x907d181c,0x3bffa7bc,
        0x9268de9e,0x6b54f6c0 } },
    /* 222 */
    { { 0xf91e135d,0xf96e2d45,0x47f90eda,0x54b7f889,0xfb73b229,0x336da15d,
        0x0d211b78,0x4d971d02 },
      { 0x50ff0147,0x1974c3fc,0x86c808cc,0x1b14505c,0x6c112d67,0xce66ab02,
        0x0c0231fe,0x69fafa32 } },
    /* 223 */
    { { 0x05a94617,0x8d851956,0x0c5f7fee,0xbe07ec98,0x907711f8,0xe0ccb082,
        0x3b82b814,0xc6709cbe },
      { 0xdf8014a0,0x3da1bae0,0x0b547f76,0x3f78beb2,0x94a0cc36,0x98d0b7fd,
        0x2b2e7ce1,0xb87de651 } },
    /* 224 */
    { { 0xc3219f63,0x33a41222,0x4a847636,0x070730db,0x482146e7,0x49f5cdda,
        0x8f7e8088,0x0f3b01a2 },
      { 0x24ed5675,0xd50d3c70,0xd12ebd84,0x7e56578f,0x36e5ebd6,0xae574c6a,
        0x311490bf,0x3a6a7004 } },
    /* 225 */
    { { 0x9dc3afa7,0x94e7397e,0xf1475d2b,0x4a2bf9aa,0xbb1ad3e0,0xc8b14f38,
        0x3493e504,0x65657f7c },
      { 0x4162798f,0x3342a58d,0x47f1f764,0x446a208f,0x3c10275a,0x11795deb,
        0x270c97a0,0x62e54572 } },
    /* 226 */
    { { 0x3fd3001a,0x199537c0,0x95687faa,0x292d8736,0x0ed75bf6,0x63e19958,
        0x37bbe563,0xfad9dbb0 },
      { 0x6330d6f7,0x8a324881,0x7ac23a2c,0x03b5f10a,0xbc4e295d,0x3a939dbc,
        0xb1b12f19,0xa3e6119a } },
    /* 227 */
    { { 0xb42823a4,0xfb67cecd,0x73f43db3,0x26ecf068,0x52f1c5fa,0xfb86e108,
        0xb8185042,0x74ba5c89 },
      { 0x8c74b8af,0xa5f58428,0xa1dbf80a,0x33716f67,0x223854cb,0x172190af,
        0x676ccaca,0xbffbbbc4 } },
    /* 228 */
    { { 0xe28b90c5,0xf662064e,0xf79d0be9,0x563d7e97,0x56becae0,0x34330aca,
        0xb6b1e3de,0x7c64d2be },
      { 0x31b53678,0x8dc53abe,0x650da609,0x34608a9f,0x16f66c18,0x4f1b089c,
        0xbf5c6c4f,0xd0a9d4ca } },
    /* 229 */
    { { 0x8dd922a9,0x1f631e85,0x8691bd15,0xa5394eac,0xc8860f68,0xd77571b3,
        0xe7d234bd,0x06bad558 },
      { 0x69d6c786,0x29962727,0x1dd44649,0x5f02f385,0xb0303874,0xf0b87128,
        0x260f67db,0x1184eb38 } },
    /* 230 */
    { { 0xf646a2d8,0x4fbc2176,0xfcaf9f98,0xb59a9d2d,0xe398fd97,0x63d4394b,
        0x94480bdd,0x026ff9bc },
      { 0xb25eb68f,0x31cb2a85,0x1ed33abc,0x3700d8ab,0xcc504287,0x653c3e89,
        0xf1f78624,0xf81ba865 } },
    /* 231 */
    { { 0xec2b7ab7,0x19aeb2d4,0x5a60f91e,0xfae73e76,0xe7a33ad4,0x59ebf10d,
        0xdfaf022d,0x731217a1 },
      { 0x3e5c73d5,0x44feb342,0x12420333,0x7b46a628,0xca063263,0x8dbf2725,
        0x9ceee3a8,0x2f19658b } },
    /* 232 */
    { { 0xee1aa4ef,0x1b0eeb8b,0x53f8bc25,0x881f09db,0xebe31aa5,0xde19ed0f,
        0xb421079e,0xc1205040 },
      { 0x7f9fbb19,0x6abe613d,0x4c02f1ae,0x480eb33f,0xbc78a4aa,0x98272198,
        0x0060c59f,0x73bd74b9 } },
    /* 233 */
    { { 0xb7f909a1,0x26f7d0f0,0x7e4c5a48,0xffc76b17,0x88442ea1,0x793ea04b,
        0x3936ad3b,0xe389c45d },
      { 0x843ffd3c,0xcef076b6,0x43e56892,0x364ac1ec,0xdad106e5,0xbfc58bb0,
        0x64b886ac,0xaed22ac2 } },
    /* 234 */
    { { 0x869ae3dd,0xe31334cc,0x98110bae,0x52b64143,0xbb8dd6cc,0x256fe087,
        0x519dd12c,0x29f73d4c },
      { 0xe2b5be53,0x3fece3d3,0xbd5f8344,0x55687bee,0x010be101,0x257f6456,
        0xb9ab6eff,0x38390f01 } },
    /* 235 */
    { { 0x0cdf4b26,0xd67ae41b,0x7e774fa6,0x84236c0a,0x95d979c5,0xbbdc69a0,
        0x3605d2dc,0xd5bc7358 },
      { 0x79a77475,0xde384dd3,0x02a480f7,0x9f094f5a,0x0beeea56,0x2e77bf03,
        0x865158ba,0xa6a6adcb } },
    /* 236 */
    { { 0x155cbb33,0xd7d7c70d,0x9ea44142,0x47823ae6,0xdc91a3d7,0x47e9c5ad,
        0x75312c3a,0x5ce9047c },
      { 0x14696568,0x70e98cc5,0x641ab644,0x9a2efc99,0x21dafe31,0x47efa05a,
        0x5ac5b71f,0x2cefaab2 } },
    /* 237 */
    { { 0x7bccf3ca,0xb12db204,0x77e8fa88,0x15dfed52,0x824a58ae,0xe981a650,
        0xb8628bc9,0xe47a22d5 },
      { 0x688432d8,0xb7965f01,0xedacb523,0xcc3015bb,0x8a53ba8e,0x4d8c847e,
        0xbeea6f3b,0x19601827 } },
    /* 238 */
    { { 0x1feb5071,0xfff32328,0xf54a0cf7,0xd16cd02d,0x138f89bf,0xeb6f98ed,
        0x7ff7d3b8,0x53164715 },
      { 0xc992b998,0x01d104ef,0x3b19571e,0x5a7c4cb2,0x5b93dc12,0xa872e737,
        0x74954891,0x22e7a9db } },
    /* 239 */
    { { 0x0283ccdf,0x9f6198e8,0xf78cd2c6,0x8b0eaeb9,0x78604294,0x0d9fecea,
        0xe9b26934,0xd0ac75fe },
      { 0x36fdf44f,0xba2ccb4a,0x90828426,0x828b5123,0x631013ac,0x1b76b83c,
        0x69874176,0xf8d1bf63 } },
    /* 240 */
    { { 0x33c6d17c,0x1e601505,0x0c76fbcb,0xec3d5b60,0x00604f65,0x23ebbee1,
        0x5644050b,0x12959cbc },
      { 0xf023a933,0xea58df49,0x920421e2,0x58b9cc89,0xc0979200,0xf2b13f1b,
        0x9af1622a,0x1aac8e32 } },
    /* 241 */
    { { 0x54e44471,0x56d3c867,0xd60f959e,0x16cfa79c,0x3800aa6d,0xe1a0a9b3,
        0x63cf5cb5,0x03478573 },
      { 0x281c0625,0x5d93f256,0xc6e710c4,0x4eda2ed5,0x1fa7caf8,0x76d99846,
        0x1b6c2e3b,0x5fbd4e1b } },
    /* 242 */
    { { 0x2628bd27,0xdeee9c0e,0x6f8d8926,0x5ed1edc9,0xba6c6702,0x4bbc7968,
        0xc47b97e8,0x71c11b59 },
      { 0xd93fdd98,0x269af35c,0xad98d80f,0x250f63e7,0x4a878b4d,0x9640ec91,
        0x05eb0c5d,0xd994d23b } },
    /* 243 */
    { { 0xe2eb6f86,0x0349852c,0xaff1aad5,0xb7e3620f,0xb9a9359d,0x0f8a633c,
        0x0b99e076,0xc89a7027 },
      { 0x6661ebad,0x18555323,0xda88f0ba,0x85ec6e68,0xdb0f4d37,0xa8542f32,
        0x82ee8616,0x04e03ee0 } },
    /* 244 */
    { { 0x86460df0,0xaa463c26,0xefd5e793,0x08b775cf,0x8409d3d9,0x14e17975,
        0x737a958d,0xe68e9468 },
      { 0xca015c8b,0x6519e649,0xa35c7b2a,0xd6310f75,0xcab343f8,0xf1faec99,
        0x32f77af7,0x1b23979c } },
    /* 245 */
    { { 0x2b5e0c0c,0x3526d420,0x528c897f,0x99db2bd9,0x26bfcd02,0xb64d880d,
        0xef2ecd27,0xdd78c263 },
      { 0x95822826,0xa0b35078,0xacf21c03,0x5ea1c0e5,0xdbe7e601,0x3d5b1d01,
        0x8d9215b4,0x139c073f } },
    /* 246 */
    { { 0x670e8ca9,0xbd9222c7,0xa4b03512,0x381bd976,0x6946fc83,0x9c5d3aca,
        0xa6f3316d,0x5a13dc71 },
      { 0x0f25e97b,0xbcbf2364,0x6fe55b35,0xdd741a0b,0x85cdaace,0x748a7707,
        0x77211b82,0x02d9d814 } },
    /* 247 */
    { { 0x83eca061,0x766514ee,0xca7faa4c,0x38df097c,0xc850fc7d,0x88886165,
        0x7c80986b,0x5f4fcb7a },
      { 0xc8612b88,0x58c498cb,0xd0029d39,0xa26ed74a,0x11118e41,0xed010aa4,
        0x0808e5f4,0x01239ca9 } },
    /* 248 */
    { { 0x771f2025,0x8b41551b,0x1dad7187,0x8931e6f0,0x84d1d187,0x633b0ba5,
        0x1fb4ec83,0x80176026 },
      { 0xa3fed11f,0x0a1740c3,0x0e31c6ca,0x49dcada1,0xd1079e1b,0xb96f0bd6,
        0x5035edf5,0xd325b1ba } },
    /* 249 */
    { { 0x45614b0c,0x9ecca10c,0x0f520a05,0x65d4b71b,0x496af3b3,0xc875ce5b,
        0x089ec25b,0x1993daac },
      { 0x9b44405f,0x6c27531e,0xe8327055,0x7166a016,0x66a45d43,0xba7ed055,
        0x3d3531a0,0x1da832bb } },
    /* 250 */
    { { 0xb92d1d40,0x8b4e0e7a,0x2c66c63b,0x8692417a,0x8735ec72,0xcf340c58,
        0xb5f78949,0xb5856961 },
      { 0xb1715164,0xd10a0b91,0xbd2dabfa,0x864c17c7,0xa94db101,0x480dd9f7,
        0x8f038493,0xa7dff882 } },
    /* 251 */
    { { 0xedf73f04,0xd39c5bbd,0x724545d9,0x3a8fea08,0x74f7306a,0xca683587,
        0xb97ef241,0x7094aeb4 },
      { 0xd72ebf79,0x06623559,0xfa95a003,0xde24a91d,0xa716a892,0x34e73d4e,
        0xddc9453f,0xf0477a2c } },
    /* 252 */
    { { 0x1fb80211,0xa032471c,0x629f78ed,0x47c322b5,0xb4d34838,0x92a62b56,
        0x8e88c984,0x2400e424 },
      { 0xd3dbc9d8,0xaf924289,0x74a08df6,0x257c14a6,0x6a095105,0x95902016,
        0x8bfdd383,0xf5ac5452 } },
    /* 253 */
    { { 0x42980d58,0xfb37e5ba,0x75657f91,0x2c031e61,0x4483bd4d,0xf9e45e92,
        0x64132fbb,0x43b13ea6 },
      { 0xd6665e37,0xddf081a4,0xa715ddd6,0x93f75def,0x2b039528,0x4c76d8fa,
        0x839aeab0,0x4ee3a221 } },
    /* 254 */
    { { 0x3a6ef7ba,0x97ff049d,0xf217b134,0xbcc779d5,0x850cc2ab,0xea153370,
        0xea78cbef,0x93967c32 },
      { 0xc18605ea,0xdb72faa2,0x5e16939c,0xddee2f6f,0xeae0e4f8,0xf53bf342,
        0xfddc580f,0x14e25972 } },
    /* 255 */
    { { 0x950d7f94,0x0854dcd8,0x3ea3b4d6,0x07006a66,0xdf8b5b2f,0xa91fa63f,
        0x060c2f4a,0xaad30b11 },
      { 0x4254ba5d,0x1a30c016,0xc5847aea,0x31450eaa,0xd49eab3c,0x41c6740c,
        0xb97d5888,0xbcc984ef } },
};

/* Multiply the base point of P256 by the scalar and return the result.
 * If map is true then convert result to affine coordinates.
 *
 * Stripe implementation.
 * Pre-generated: 2^0, 2^32, ...
 * Pre-generated: products of all combinations of above.
 * 8 doubles and adds (with qz=1)
 *
 * r     Resulting point.
 * k     Scalar to multiply by.
 * map   Indicates whether to convert result to affine.
 * ct    Constant time required.
 * heap  Heap to use for allocation.
 * returns MEMORY_E when memory allocation fails and MP_OKAY on success.
 */
static int sp_256_ecc_mulmod_base_sm2_8(sp_point_256* r, const sp_digit* k,
        int map, int ct, void* heap)
{
    return sp_256_ecc_mulmod_stripe_sm2_8(r, &p256_sm2_base, p256_sm2_table,
                                      k, map, ct, heap);
}

#endif

/* Multiply the base point of P256 by the scalar and return the result.
 * If map is true then convert result to affine coordinates.
 *
 * km    Scalar to multiply by.
 * r     Resulting point.
 * map   Indicates whether to convert result to affine.
 * heap  Heap to use for allocation.
 * returns MEMORY_E when memory allocation fails and MP_OKAY on success.
 */
int sp_ecc_mulmod_base_sm2_256(const mp_int* km, ecc_point* r, int map, void* heap)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_point_256* point = NULL;
    sp_digit* k = NULL;
#else
    sp_point_256  point[1];
    sp_digit k[8];
#endif
    int err = MP_OKAY;

#ifdef WOLFSSL_SP_SMALL_STACK
    point = (sp_point_256*)XMALLOC(sizeof(sp_point_256), heap,
                                         DYNAMIC_TYPE_ECC);
    if (point == NULL)
        err = MEMORY_E;
    if (err == MP_OKAY) {
        k = (sp_digit*)XMALLOC(sizeof(sp_digit) * 8, heap,
                               DYNAMIC_TYPE_ECC);
        if (k == NULL)
            err = MEMORY_E;
    }
#endif

    if (err == MP_OKAY) {
        sp_256_from_mp(k, 8, km);

            err = sp_256_ecc_mulmod_base_sm2_8(point, k, map, 1, heap);
    }
    if (err == MP_OKAY) {
        err = sp_256_point_to_ecc_point_8(point, r);
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(k, heap, DYNAMIC_TYPE_ECC);
    XFREE(point, heap, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

/* Multiply the base point of P256 by the scalar, add point a and return
 * the result. If map is true then convert result to affine coordinates.
 *
 * km      Scalar to multiply by.
 * am      Point to add to scalar multiply result.
 * inMont  Point to add is in montgomery form.
 * r       Resulting point.
 * map     Indicates whether to convert result to affine.
 * heap    Heap to use for allocation.
 * returns MEMORY_E when memory allocation fails and MP_OKAY on success.
 */
int sp_ecc_mulmod_base_add_sm2_256(const mp_int* km, const ecc_point* am,
        int inMont, ecc_point* r, int map, void* heap)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_point_256* point = NULL;
    sp_digit* k = NULL;
#else
    sp_point_256 point[2];
    sp_digit k[8 + 8 * 2 * 6];
#endif
    sp_point_256* addP = NULL;
    sp_digit* tmp = NULL;
    int err = MP_OKAY;

#ifdef WOLFSSL_SP_SMALL_STACK
    point = (sp_point_256*)XMALLOC(sizeof(sp_point_256) * 2, heap,
                                         DYNAMIC_TYPE_ECC);
    if (point == NULL)
        err = MEMORY_E;
    if (err == MP_OKAY) {
        k = (sp_digit*)XMALLOC(
            sizeof(sp_digit) * (8 + 8 * 2 * 6),
            heap, DYNAMIC_TYPE_ECC);
        if (k == NULL)
            err = MEMORY_E;
    }
#endif

    if (err == MP_OKAY) {
        addP = point + 1;
        tmp = k + 8;

        sp_256_from_mp(k, 8, km);
        sp_256_point_from_ecc_point_8(addP, am);
    }
    if ((err == MP_OKAY) && (!inMont)) {
        err = sp_256_mod_mul_norm_sm2_8(addP->x, addP->x, p256_sm2_mod);
    }
    if ((err == MP_OKAY) && (!inMont)) {
        err = sp_256_mod_mul_norm_sm2_8(addP->y, addP->y, p256_sm2_mod);
    }
    if ((err == MP_OKAY) && (!inMont)) {
        err = sp_256_mod_mul_norm_sm2_8(addP->z, addP->z, p256_sm2_mod);
    }
    if (err == MP_OKAY) {
            err = sp_256_ecc_mulmod_base_sm2_8(point, k, 0, 0, heap);
    }
    if (err == MP_OKAY) {
            sp_256_proj_point_add_sm2_8(point, point, addP, tmp);

        if (map) {
                sp_256_map_sm2_8(point, point, tmp);
        }

        err = sp_256_point_to_ecc_point_8(point, r);
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(k, heap, DYNAMIC_TYPE_ECC);
    XFREE(point, heap, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

#if defined(WOLFSSL_VALIDATE_ECC_KEYGEN) || defined(HAVE_ECC_SIGN) || \
                                                        defined(HAVE_ECC_VERIFY)
#endif /* WOLFSSL_VALIDATE_ECC_KEYGEN | HAVE_ECC_SIGN | HAVE_ECC_VERIFY */
/* Add 1 to a. (a = a + 1)
 *
 * a  A single precision integer.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static void sp_256_add_one_sm2_8(sp_digit* a_p)
#else
static void sp_256_add_one_sm2_8(sp_digit* a)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* a __asm__ ("r0") = (sp_digit*)a_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "LDM	%[a], {r1, r2, r3, r4}\n\t"
        "ADDS	r1, r1, #0x1\n\t"
        "ADCS	r2, r2, #0x0\n\t"
        "ADCS	r3, r3, #0x0\n\t"
        "ADCS	r4, r4, #0x0\n\t"
        "STM	%[a]!, {r1, r2, r3, r4}\n\t"
        "LDM	%[a], {r1, r2, r3, r4}\n\t"
        "ADCS	r1, r1, #0x0\n\t"
        "ADCS	r2, r2, #0x0\n\t"
        "ADCS	r3, r3, #0x0\n\t"
        "ADCS	r4, r4, #0x0\n\t"
        "STM	%[a]!, {r1, r2, r3, r4}\n\t"
        : [a] "+r" (a)
        :
        : "memory", "r1", "r2", "r3", "r4", "cc"
    );
}

/* Read big endian unsigned byte array into r.
 *
 * r  A single precision integer.
 * size  Maximum number of bytes to convert
 * a  Byte array.
 * n  Number of bytes in array to read.
 */
static void sp_256_from_bin(sp_digit* r, int size, const byte* a, int n)
{
    int i;
    int j;
    byte* d;

    for (i = n - 1,j = 0; i >= 3; i -= 4) {
        r[j]  = ((sp_digit)a[i - 0] <<  0) |
                ((sp_digit)a[i - 1] <<  8) |
                ((sp_digit)a[i - 2] << 16) |
                ((sp_digit)a[i - 3] << 24);
        j++;
    }

    if (i >= 0) {
        r[j] = 0;

        d = (byte*)r;
        switch (i) {
            case 2: d[n - 1 - 2] = a[2]; //fallthrough
            case 1: d[n - 1 - 1] = a[1]; //fallthrough
            case 0: d[n - 1 - 0] = a[0]; //fallthrough
        }
        j++;
    }

    for (; j < size; j++) {
        r[j] = 0;
    }
}

/* Generates a scalar that is in the range 1..order-1.
 *
 * rng  Random number generator.
 * k    Scalar value.
 * returns RNG failures, MEMORY_E when memory allocation fails and
 * MP_OKAY on success.
 */
static int sp_256_ecc_gen_k_sm2_8(WC_RNG* rng, sp_digit* k)
{
#ifndef WC_NO_RNG
    int err;
    byte buf[32];

    do {
        err = wc_RNG_GenerateBlock(rng, buf, sizeof(buf));
        if (err == 0) {
            sp_256_from_bin(k, 8, buf, (int)sizeof(buf));
            if (sp_256_cmp_sm2_8(k, p256_sm2_order2) <= 0) {
                sp_256_add_one_sm2_8(k);
                break;
            }
        }
    }
    while (err == 0);

    return err;
#else
    (void)rng;
    (void)k;
    return NOT_COMPILED_IN;
#endif
}

/* Makes a random EC key pair.
 *
 * rng   Random number generator.
 * priv  Generated private value.
 * pub   Generated public point.
 * heap  Heap to use for allocation.
 * returns ECC_INF_E when the point does not have the correct order, RNG
 * failures, MEMORY_E when memory allocation fails and MP_OKAY on success.
 */
int sp_ecc_make_key_sm2_256(WC_RNG* rng, mp_int* priv, ecc_point* pub, void* heap)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_point_256* point = NULL;
    sp_digit* k = NULL;
#else
    #ifdef WOLFSSL_VALIDATE_ECC_KEYGEN
    sp_point_256 point[2];
    #else
    sp_point_256 point[1];
    #endif
    sp_digit k[8];
#endif
#ifdef WOLFSSL_VALIDATE_ECC_KEYGEN
    sp_point_256* infinity = NULL;
#endif
    int err = MP_OKAY;


    (void)heap;

#ifdef WOLFSSL_SP_SMALL_STACK
    #ifdef WOLFSSL_VALIDATE_ECC_KEYGEN
    point = (sp_point_256*)XMALLOC(sizeof(sp_point_256) * 2, heap, DYNAMIC_TYPE_ECC);
    #else
    point = (sp_point_256*)XMALLOC(sizeof(sp_point_256), heap, DYNAMIC_TYPE_ECC);
    #endif
    if (point == NULL)
        err = MEMORY_E;
    if (err == MP_OKAY) {
        k = (sp_digit*)XMALLOC(sizeof(sp_digit) * 8, heap,
                               DYNAMIC_TYPE_ECC);
        if (k == NULL)
            err = MEMORY_E;
    }
#endif

    if (err == MP_OKAY) {
    #ifdef WOLFSSL_VALIDATE_ECC_KEYGEN
        infinity = point + 1;
    #endif

        err = sp_256_ecc_gen_k_sm2_8(rng, k);
    }
    if (err == MP_OKAY) {
            err = sp_256_ecc_mulmod_base_sm2_8(point, k, 1, 1, NULL);
    }

#ifdef WOLFSSL_VALIDATE_ECC_KEYGEN
    if (err == MP_OKAY) {
            err = sp_256_ecc_mulmod_8(infinity, point, p256_sm2_order, 1, 1, NULL);
    }
    if (err == MP_OKAY) {
        if (sp_256_iszero_8(point->x) || sp_256_iszero_8(point->y)) {
            err = ECC_INF_E;
        }
    }
#endif

    if (err == MP_OKAY) {
        err = sp_256_to_mp(k, priv);
    }
    if (err == MP_OKAY) {
        err = sp_256_point_to_ecc_point_8(point, pub);
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(k, heap, DYNAMIC_TYPE_ECC);
    /* point is not sensitive, so no need to zeroize */
    XFREE(point, heap, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

#ifdef WOLFSSL_SP_NONBLOCK
typedef struct sp_ecc_key_gen_256_ctx {
    int state;
    sp_256_ecc_mulmod_8_ctx mulmod_ctx;
    sp_digit k[8];
#ifdef WOLFSSL_VALIDATE_ECC_KEYGEN
    sp_point_256  point[2];
#else
    sp_point_256 point[1];
#endif /* WOLFSSL_VALIDATE_ECC_KEYGEN */
} sp_ecc_key_gen_256_ctx;

int sp_ecc_make_key_256_nb(sp_ecc_ctx_t* sp_ctx, WC_RNG* rng, mp_int* priv,
    ecc_point* pub, void* heap)
{
    int err = FP_WOULDBLOCK;
    sp_ecc_key_gen_256_ctx* ctx = (sp_ecc_key_gen_256_ctx*)sp_ctx->data;
#ifdef WOLFSSL_VALIDATE_ECC_KEYGEN
    sp_point_256* infinity = ctx->point + 1;
#endif /* WOLFSSL_VALIDATE_ECC_KEYGEN */

    typedef char ctx_size_test[sizeof(sp_ecc_key_gen_256_ctx)
                               >= sizeof(*sp_ctx) ? -1 : 1];
    (void)sizeof(ctx_size_test);

    switch (ctx->state) {
        case 0:
            err = sp_256_ecc_gen_k_8(rng, ctx->k);
            if (err == MP_OKAY) {
                err = FP_WOULDBLOCK;
                ctx->state = 1;
            }
            break;
        case 1:
            err = sp_256_ecc_mulmod_base_8_nb((sp_ecc_ctx_t*)&ctx->mulmod_ctx,
                      ctx->point, ctx->k, 1, 1, heap);
            if (err == MP_OKAY) {
                err = FP_WOULDBLOCK;
            #ifdef WOLFSSL_VALIDATE_ECC_KEYGEN
                XMEMSET(&ctx->mulmod_ctx, 0, sizeof(ctx->mulmod_ctx));
                ctx->state = 2;
            #else
                ctx->state = 3;
            #endif
            }
            break;
    #ifdef WOLFSSL_VALIDATE_ECC_KEYGEN
        case 2:
            err = sp_256_ecc_mulmod_8_nb((sp_ecc_ctx_t*)&ctx->mulmod_ctx,
                      infinity, ctx->point, p256_sm2_order, 1, 1);
            if (err == MP_OKAY) {
                if (sp_256_iszero_8(ctx->point->x) ||
                    sp_256_iszero_8(ctx->point->y)) {
                    err = ECC_INF_E;
                }
                else {
                    err = FP_WOULDBLOCK;
                    ctx->state = 3;
                }
            }
            break;
    #endif /* WOLFSSL_VALIDATE_ECC_KEYGEN */
        case 3:
            err = sp_256_to_mp(ctx->k, priv);
            if (err == MP_OKAY) {
                err = sp_256_point_to_ecc_point_8(ctx->point, pub);
            }
            break;
    }

    if (err != FP_WOULDBLOCK) {
        XMEMSET(ctx, 0, sizeof(sp_ecc_key_gen_256_ctx));
    }

    return err;
}
#endif /* WOLFSSL_SP_NONBLOCK */

#ifdef HAVE_ECC_DHE
/* Write r as big endian to byte array.
 * Fixed length number of bytes written: 32
 *
 * r  A single precision integer.
 * a  Byte array.
 */
static void sp_256_to_bin_8(sp_digit* r, byte* a)
{
    int i;
    int j = 0;

    for (i = 7; i >= 0; i--) {
        a[j++] = r[i] >> 24;
        a[j++] = r[i] >> 16;
        a[j++] = r[i] >> 8;
        a[j++] = r[i] >> 0;
    }
}

/* Multiply the point by the scalar and serialize the X ordinate.
 * The number is 0 padded to maximum size on output.
 *
 * priv    Scalar to multiply the point by.
 * pub     Point to multiply.
 * out     Buffer to hold X ordinate.
 * outLen  On entry, size of the buffer in bytes.
 *         On exit, length of data in buffer in bytes.
 * heap    Heap to use for allocation.
 * returns BUFFER_E if the buffer is to small for output size,
 * MEMORY_E when memory allocation fails and MP_OKAY on success.
 */
int sp_ecc_secret_gen_sm2_256(const mp_int* priv, const ecc_point* pub, byte* out,
                          word32* outLen, void* heap)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_point_256* point = NULL;
    sp_digit* k = NULL;
#else
    sp_point_256 point[1];
    sp_digit k[8];
#endif
    int err = MP_OKAY;

    if (*outLen < 32U) {
        err = BUFFER_E;
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    if (err == MP_OKAY) {
        point = (sp_point_256*)XMALLOC(sizeof(sp_point_256), heap,
                                         DYNAMIC_TYPE_ECC);
        if (point == NULL)
            err = MEMORY_E;
    }
    if (err == MP_OKAY) {
        k = (sp_digit*)XMALLOC(sizeof(sp_digit) * 8, heap,
                               DYNAMIC_TYPE_ECC);
        if (k == NULL)
            err = MEMORY_E;
    }
#endif

    if (err == MP_OKAY) {
        sp_256_from_mp(k, 8, priv);
        sp_256_point_from_ecc_point_8(point, pub);
            err = sp_256_ecc_mulmod_sm2_8(point, point, k, 1, 1, heap);
    }
    if (err == MP_OKAY) {
        sp_256_to_bin_8(point->x, out);
        *outLen = 32;
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(k, heap, DYNAMIC_TYPE_ECC);
    XFREE(point, heap, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

#ifdef WOLFSSL_SP_NONBLOCK
typedef struct sp_ecc_sec_gen_256_ctx {
    int state;
    union {
        sp_256_ecc_mulmod_8_ctx mulmod_ctx;
    };
    sp_digit k[8];
    sp_point_256 point;
} sp_ecc_sec_gen_256_ctx;

int sp_ecc_secret_gen_256_nb(sp_ecc_ctx_t* sp_ctx, const mp_int* priv,
    const ecc_point* pub, byte* out, word32* outLen, void* heap)
{
    int err = FP_WOULDBLOCK;
    sp_ecc_sec_gen_256_ctx* ctx = (sp_ecc_sec_gen_256_ctx*)sp_ctx->data;

    typedef char ctx_size_test[sizeof(sp_ecc_sec_gen_256_ctx) >= sizeof(*sp_ctx) ? -1 : 1];
    (void)sizeof(ctx_size_test);

    if (*outLen < 32U) {
        err = BUFFER_E;
    }

    switch (ctx->state) {
        case 0:
            sp_256_from_mp(ctx->k, 8, priv);
            sp_256_point_from_ecc_point_8(&ctx->point, pub);
            ctx->state = 1;
            break;
        case 1:
            err = sp_256_ecc_mulmod_sm2_8_nb((sp_ecc_ctx_t*)&ctx->mulmod_ctx,
                      &ctx->point, &ctx->point, ctx->k, 1, 1, heap);
            if (err == MP_OKAY) {
                sp_256_to_bin_8(ctx->point.x, out);
                *outLen = 32;
            }
            break;
    }

    if (err == MP_OKAY && ctx->state != 1) {
        err = FP_WOULDBLOCK;
    }
    if (err != FP_WOULDBLOCK) {
        XMEMSET(ctx, 0, sizeof(sp_ecc_sec_gen_256_ctx));
    }

    return err;
}
#endif /* WOLFSSL_SP_NONBLOCK */
#endif /* HAVE_ECC_DHE */

#if defined(HAVE_ECC_SIGN) || defined(HAVE_ECC_VERIFY)
#ifdef WOLFSSL_SP_SMALL
/* Sub b from a into r. (r = a - b)
 *
 * r  A single precision integer.
 * a  A single precision integer.
 * b  A single precision integer.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static sp_digit sp_256_sub_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p)
#else
static sp_digit sp_256_sub_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "MOV	r11, #0x0\n\t"
        "ADD	r12, %[a], #0x20\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_sub_sm2_8_word:\n\t"
#else
    "L_sp_256_sub_sm2_8_word_%=:\n\t"
#endif
        "RSBS	r11, r11, #0x0\n\t"
        "LDM	%[a]!, {r3, r4, r5, r6}\n\t"
        "LDM	%[b]!, {r7, r8, r9, r10}\n\t"
        "SBCS	r3, r3, r7\n\t"
        "SBCS	r4, r4, r8\n\t"
        "SBCS	r5, r5, r9\n\t"
        "SBCS	r6, r6, r10\n\t"
        "STM	%[r]!, {r3, r4, r5, r6}\n\t"
        "SBC	r11, r3, r3\n\t"
        "CMP	%[a], r12\n\t"
#if defined(__GNUC__)
        "BNE	L_sp_256_sub_sm2_8_word_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BNE.N	L_sp_256_sub_sm2_8_word\n\t"
#else
        "BNE.N	L_sp_256_sub_sm2_8_word_%=\n\t"
#endif
        "MOV	%[r], r11\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "cc"
    );
    return (uint32_t)(size_t)r;
}

#else
/* Sub b from a into r. (r = a - b)
 *
 * r  A single precision integer.
 * a  A single precision integer.
 * b  A single precision integer.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static sp_digit sp_256_sub_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p)
#else
static sp_digit sp_256_sub_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "LDM	%[a]!, {r3, r4, r5, r6}\n\t"
        "LDM	%[b]!, {r7, r8, r9, r10}\n\t"
        "SUBS	r3, r3, r7\n\t"
        "SBCS	r4, r4, r8\n\t"
        "SBCS	r5, r5, r9\n\t"
        "SBCS	r6, r6, r10\n\t"
        "STM	%[r]!, {r3, r4, r5, r6}\n\t"
        "LDM	%[a]!, {r3, r4, r5, r6}\n\t"
        "LDM	%[b]!, {r7, r8, r9, r10}\n\t"
        "SBCS	r3, r3, r7\n\t"
        "SBCS	r4, r4, r8\n\t"
        "SBCS	r5, r5, r9\n\t"
        "SBCS	r6, r6, r10\n\t"
        "STM	%[r]!, {r3, r4, r5, r6}\n\t"
        "SBC	%[r], r6, r6\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
        :
        : "memory", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "cc"
    );
    return (uint32_t)(size_t)r;
}

#endif /* WOLFSSL_SP_SMALL */
#endif
#if defined(HAVE_ECC_SIGN) || defined(HAVE_ECC_VERIFY)
#endif
#ifdef WOLFSSL_SP_SMALL
/* Conditionally add a and b using the mask m.
 * m is -1 to add and 0 when not.
 *
 * r  A single precision number representing conditional add result.
 * a  A single precision number to add with.
 * b  A single precision number to add.
 * m  Mask value to apply.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static sp_digit sp_256_cond_add_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p, sp_digit m_p)
#else
static sp_digit sp_256_cond_add_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b, sp_digit m)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
    register sp_digit m __asm__ ("r3") = (sp_digit)m_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "MOV	r5, #0x0\n\t"
        "MOV	r8, #0x0\n\t"
        "MOV	r4, #0x0\n\t"
        "\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
    "L_sp_256_cond_add_sm2_8_words:\n\t"
#else
    "L_sp_256_cond_add_sm2_8_words_%=:\n\t"
#endif
        "ADDS	r5, r5, #0xffffffff\n\t"
        "LDR	r6, [%[a], r4]\n\t"
        "LDR	r7, [%[b], r4]\n\t"
        "AND	r7, r7, %[m]\n\t"
        "ADCS	r6, r6, r7\n\t"
        "ADC	r5, r8, r8\n\t"
        "STR	r6, [%[r], r4]\n\t"
        "ADD	r4, r4, #0x4\n\t"
        "CMP	r4, #0x20\n\t"
#if defined(__GNUC__)
        "BLT	L_sp_256_cond_add_sm2_8_words_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
        "BLT.N	L_sp_256_cond_add_sm2_8_words\n\t"
#else
        "BLT.N	L_sp_256_cond_add_sm2_8_words_%=\n\t"
#endif
        "MOV	%[r], r5\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b), [m] "+r" (m)
        :
        : "memory", "r4", "r5", "r6", "r7", "r8", "cc"
    );
    return (uint32_t)(size_t)r;
}

#else
/* Conditionally add a and b using the mask m.
 * m is -1 to add and 0 when not.
 *
 * r  A single precision number representing conditional add result.
 * a  A single precision number to add with.
 * b  A single precision number to add.
 * m  Mask value to apply.
 */
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
static sp_digit sp_256_cond_add_sm2_8(sp_digit* r_p, const sp_digit* a_p, const sp_digit* b_p, sp_digit m_p)
#else
static sp_digit sp_256_cond_add_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b, sp_digit m)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
    register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
    register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
    register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
    register sp_digit m __asm__ ("r3") = (sp_digit)m_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */

    __asm__ __volatile__ (
        "MOV	r10, #0x0\n\t"
        "LDM	%[a]!, {r6, r7}\n\t"
        "LDM	%[b]!, {r8, r9}\n\t"
        "AND	r8, r8, %[m]\n\t"
        "AND	r9, r9, %[m]\n\t"
        "ADDS	r6, r6, r8\n\t"
        "ADCS	r7, r7, r9\n\t"
        "STM	%[r]!, {r6, r7}\n\t"
        "LDM	%[a]!, {r6, r7}\n\t"
        "LDM	%[b]!, {r8, r9}\n\t"
        "AND	r8, r8, %[m]\n\t"
        "AND	r9, r9, %[m]\n\t"
        "ADCS	r6, r6, r8\n\t"
        "ADCS	r7, r7, r9\n\t"
        "STM	%[r]!, {r6, r7}\n\t"
        "LDM	%[a]!, {r6, r7}\n\t"
        "LDM	%[b]!, {r8, r9}\n\t"
        "AND	r8, r8, %[m]\n\t"
        "AND	r9, r9, %[m]\n\t"
        "ADCS	r6, r6, r8\n\t"
        "ADCS	r7, r7, r9\n\t"
        "STM	%[r]!, {r6, r7}\n\t"
        "LDM	%[a]!, {r6, r7}\n\t"
        "LDM	%[b]!, {r8, r9}\n\t"
        "AND	r8, r8, %[m]\n\t"
        "AND	r9, r9, %[m]\n\t"
        "ADCS	r6, r6, r8\n\t"
        "ADCS	r7, r7, r9\n\t"
        "STM	%[r]!, {r6, r7}\n\t"
        "ADC	%[r], r10, r10\n\t"
        : [r] "+r" (r), [a] "+r" (a), [b] "+r" (b), [m] "+r" (m)
        :
        : "memory", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "cc"
    );
    return (uint32_t)(size_t)r;
}

#endif /* WOLFSSL_SP_SMALL */
#if defined(HAVE_ECC_SIGN) || defined(HAVE_ECC_VERIFY)
#ifdef WOLFSSL_SP_SMALL
/* Order-2 for the SM2 P256 curve. */
static const uint32_t p256_sm2_order_minus_2[8] = {
    0x39d54121U,0x53bbf409U,0x21c6052bU,0x7203df6bU,0xffffffffU,0xffffffffU,
    0xffffffffU,0xfffffffeU
};
#else
#ifdef HAVE_ECC_SIGN
/* The low half of the order-2 of the SM2 P256 curve. */
static const uint32_t p256_sm2_order_low[4] = {
    0x39d54121U,0x53bbf409U,0x21c6052bU,0x7203df6bU
};
#endif /* HAVE_ECC_SIGN */
#endif /* WOLFSSL_SP_SMALL */

#ifdef HAVE_ECC_SIGN
/* Multiply two number mod the order of P256 curve. (r = a * b mod order)
 *
 * r  Result of the multiplication.
 * a  First operand of the multiplication.
 * b  Second operand of the multiplication.
 */
static void sp_256_mont_mul_order_sm2_8(sp_digit* r, const sp_digit* a, const sp_digit* b)
{
    sp_256_mul_sm2_8(r, a, b);
    sp_256_mont_reduce_order_sm2_8(r, p256_sm2_order, p256_sm2_mp_order);
}

/* Square number mod the order of P256 curve. (r = a * a mod order)
 *
 * r  Result of the squaring.
 * a  Number to square.
 */
static void sp_256_mont_sqr_order_sm2_8(sp_digit* r, const sp_digit* a)
{
    sp_256_sqr_sm2_8(r, a);
    sp_256_mont_reduce_order_sm2_8(r, p256_sm2_order, p256_sm2_mp_order);
}

#ifndef WOLFSSL_SP_SMALL
/* Square number mod the order of P256 curve a number of times.
 * (r = a ^ n mod order)
 *
 * r  Result of the squaring.
 * a  Number to square.
 */
static void sp_256_mont_sqr_n_order_sm2_8(sp_digit* r, const sp_digit* a, int n)
{
    int i;

    sp_256_mont_sqr_order_sm2_8(r, a);
    for (i=1; i<n; i++) {
        sp_256_mont_sqr_order_sm2_8(r, r);
    }
}
#endif /* !WOLFSSL_SP_SMALL */
/* Invert the number, in Montgomery form, modulo the order of the P256 curve.
 * (r = 1 / a mod order)
 *
 * r   Inverse result.
 * a   Number to invert.
 * td  Temporary data.
 */
static void sp_256_mont_inv_order_sm2_8(sp_digit* r, const sp_digit* a,
        sp_digit* td)
{
#ifdef WOLFSSL_SP_SMALL
    sp_digit* t = td;
    int i;

    XMEMCPY(t, a, sizeof(sp_digit) * 8);
    for (i=254; i>=0; i--) {
        sp_256_mont_sqr_order_sm2_8(t, t);
        if ((p256_sm2_order_minus_2[i / 32] & ((sp_int_digit)1 << (i % 32))) != 0) {
            sp_256_mont_mul_order_sm2_8(t, t, a);
        }
    }
    XMEMCPY(r, t, sizeof(sp_digit) * 8U);
#else
    sp_digit* t = td;
    sp_digit* t2 = td + 2 * 8;
    sp_digit* t3 = td + 4 * 8;
    sp_digit* t4 = td + 6 * 8;
    int i;

    /* t4= a^2 */
    sp_256_mont_sqr_order_sm2_8(t4, a);
    /* t = a^3 = t4* a */
    sp_256_mont_mul_order_sm2_8(t, t4, a);
    /* t2= a^c = t ^ 2 ^ 2 */
    sp_256_mont_sqr_n_order_sm2_8(t2, t, 2);
    /* t4= a^e = t2 * t4 */
    sp_256_mont_mul_order_sm2_8(t4, t2, t4);
    /* t3= a^f = t2 * t */
    sp_256_mont_mul_order_sm2_8(t3, t2, t);
    /* t2= a^f0 = t3 ^ 2 ^ 4 */
    sp_256_mont_sqr_n_order_sm2_8(t2, t3, 4);
    /* t4 = a^fe = t2 * t4 */
    sp_256_mont_mul_order_sm2_8(t4, t2, t4);
    /* t = a^ff = t2 * t3 */
    sp_256_mont_mul_order_sm2_8(t, t2, t3);
    /* t2= a^ff00 = t ^ 2 ^ 8 */
    sp_256_mont_sqr_n_order_sm2_8(t2, t, 8);
    /* t4 = a^fffe = t2 * t4 */
    sp_256_mont_mul_order_sm2_8(t4, t2, t4);
    /* t = a^ffff = t2 * t */
    sp_256_mont_mul_order_sm2_8(t, t2, t);
    /* t2= a^ffff0000 = t ^ 2 ^ 16 */
    sp_256_mont_sqr_n_order_sm2_8(t2, t, 16);
    /* t4= a^fffffffe = t2 * t4 */
    sp_256_mont_mul_order_sm2_8(t4, t2, t4);
    /* t = a^ffffffff = t2 * t */
    sp_256_mont_mul_order_sm2_8(t, t2, t);
    /* t2= a^fffffffe00000000 = t4 ^ 2 ^ 32 */
    sp_256_mont_sqr_n_order_sm2_8(t4, t4, 32);
    /* t4= a^fffffffeffffffff = t4 * t */
    sp_256_mont_mul_order_sm2_8(t4, t4, t);
    /* t2= a^ffffffff00000000 = t ^ 2 ^ 32 */
    sp_256_mont_sqr_n_order_sm2_8(t2, t, 32);
    /* t2= a^ffffffffffffffff = t2 * t */
    sp_256_mont_mul_order_sm2_8(t, t2, t);
    /* t4= a^fffffffeffffffff0000000000000000 = t4 ^ 2 ^ 64 */
    sp_256_mont_sqr_n_order_sm2_8(t4, t4, 64);
    /* t2= a^fffffffeffffffffffffffffffffffff = t4 * t2 */
    sp_256_mont_mul_order_sm2_8(t2, t4, t);
    /* t2= a^fffffffeffffffffffffffffffffffff7203d */
    for (i=127; i>=108; i--) {
        sp_256_mont_sqr_order_sm2_8(t2, t2);
        if (((sp_digit)p256_sm2_order_low[i / 32] & ((sp_int_digit)1 << (i % 32))) != 0) {
            sp_256_mont_mul_order_sm2_8(t2, t2, a);
        }
    }
    /* t2= a^fffffffeffffffffffffffffffffffff7203df */
    sp_256_mont_sqr_n_order_sm2_8(t2, t2, 4);
    sp_256_mont_mul_order_sm2_8(t2, t2, t3);
    /* t2= a^fffffffeffffffffffffffffffffffff7203df6b21c6052b53bb */
    for (i=103; i>=48; i--) {
        sp_256_mont_sqr_order_sm2_8(t2, t2);
        if (((sp_digit)p256_sm2_order_low[i / 32] & ((sp_int_digit)1 << (i % 32))) != 0) {
            sp_256_mont_mul_order_sm2_8(t2, t2, a);
        }
    }
    /* t2= a^fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf */
    sp_256_mont_sqr_n_order_sm2_8(t2, t2, 4);
    sp_256_mont_mul_order_sm2_8(t2, t2, t3);
    /* t2= a^fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d5412 */
    for (i=43; i>=4; i--) {
        sp_256_mont_sqr_order_sm2_8(t2, t2);
        if (((sp_digit)p256_sm2_order_low[i / 32] & ((sp_int_digit)1 << (i % 32))) != 0) {
            sp_256_mont_mul_order_sm2_8(t2, t2, a);
        }
    }
    /* t2= a^fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54120 */
    sp_256_mont_sqr_n_order_sm2_8(t2, t2, 4);
    /* r = a^fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54121 */
    sp_256_mont_mul_order_sm2_8(r, t2, a);
#endif /* WOLFSSL_SP_SMALL */
}
#endif /* HAVE_ECC_SIGN */

#endif /* HAVE_ECC_SIGN || HAVE_ECC_VERIFY */
#ifdef HAVE_ECC_SIGN
#ifndef SP_ECC_MAX_SIG_GEN
#define SP_ECC_MAX_SIG_GEN  64
#endif

/* Sign the hash using the private key.
 *
 * hash     Hash to sign.
 * hashLen  Length of the hash data.
 * rng      Random number generator.
 * priv     Private part of key - scalar.
 * rm       First part of result as an mp_int.
 * sm       Sirst part of result as an mp_int.
 * heap     Heap to use for allocation.
 * returns RNG failures, MEMORY_E when memory allocation fails and
 * MP_OKAY on success.
 */
int sp_ecc_sign_sm2_256(const byte* hash, word32 hashLen, WC_RNG* rng,
    const mp_int* priv, mp_int* rm, mp_int* sm, mp_int* km, void* heap)
{
#if (defined(WOLFSSL_SP_SMALL) || defined(WOLFSSL_SMALL_STACK)) && !defined(WOLFSSL_SP_NO_MALLOC)
    sp_digit* d = NULL;
    sp_point_256* point = NULL;
#else
    sp_digit d[4 * 10*8];
    sp_point_256 point[1];
#endif
    sp_digit* e = NULL;
    sp_digit* x = NULL;
    sp_digit* k = NULL;
    sp_digit* r = NULL;
    sp_digit* tmp = NULL;
    sp_digit* s = NULL;
    sp_digit* xInv = NULL;
    int err = MP_OKAY;
    sp_int32 c;
    int i;

    (void)heap;

#if (defined(WOLFSSL_SP_SMALL) || defined(WOLFSSL_SMALL_STACK)) && !defined(WOLFSSL_SP_NO_MALLOC)
    if (err == MP_OKAY) {
        d = (sp_digit*)XMALLOC(sizeof(sp_digit) * 8 * 2 * 8, heap,
                                                              DYNAMIC_TYPE_ECC);
        if (d == NULL) {
            err = MEMORY_E;
        }
    }

    if (err == MP_OKAY) {
        point = (sp_point_256*)XMALLOC(sizeof(sp_point_256), heap,
            DYNAMIC_TYPE_ECC);
        if (point == NULL) {
            err = MEMORY_E;
        }
    }
#endif

    if (err == MP_OKAY) {
        e = d + 0 * 8;
        x = d + 2 * 8;
        k = d + 4 * 8;
        r = d + 6 * 8;
        tmp = d + 8 * 8;
        s = e;
        xInv = x;

        if (hashLen > 32U) {
            hashLen = 32U;
        }

        sp_256_from_bin(e, 8, hash, (int)hashLen);
    }

    for (i = SP_ECC_MAX_SIG_GEN; err == MP_OKAY && i > 0; i--) {
        sp_256_from_mp(x, 8, priv);

        /* New random point. */
        if (km == NULL || mp_iszero(km)) {
            err = sp_256_ecc_gen_k_sm2_8(rng, k);
        }
        else {
            sp_256_from_mp(k, 8, km);
            mp_zero(km);
        }
        if (err == MP_OKAY) {
                err = sp_256_ecc_mulmod_base_sm2_8(point, k, 1, 1, NULL);
        }

        if (err == MP_OKAY) {
            /* r = (point->x + e) mod order */
            c = sp_256_add_sm2_8(r, point->x, e);
            sp_256_cond_sub_sm2_8(r, r, p256_sm2_order, 0L - (sp_digit)c);
            c = sp_256_cmp_sm2_8(r, p256_sm2_order);
            sp_256_cond_sub_sm2_8(r, r, p256_sm2_order, 0L - (sp_digit)(c >= 0));

            /* Try again if r == 0 */
            if (sp_256_iszero_8(r)) {
                continue;
            }

            /* Try again if r + k == 0 */
            c = sp_256_add_sm2_8(s, k, r);
            sp_256_cond_sub_sm2_8(s, s, p256_sm2_order, 0L - (sp_digit)c);
            c = sp_256_cmp_sm2_8(s, p256_sm2_order);
            sp_256_cond_sub_sm2_8(s, s, p256_sm2_order, 0L - (sp_digit)(c >= 0));
            if (sp_256_iszero_8(s)) {
                continue;
            }

            /* Conv x to Montgomery form (mod order) */
                sp_256_mul_sm2_8(x, x, p256_sm2_norm_order);
            err = sp_256_mod_sm2_8(x, x, p256_sm2_order);
        }
        if (err == MP_OKAY) {
            sp_256_norm_8(x);

            /* s = k - r * x */
                sp_256_mont_mul_order_sm2_8(s, x, r);
        }
        if (err == MP_OKAY) {
            sp_256_norm_8(s);
            c = sp_256_sub_sm2_8(s, k, s);
            sp_256_cond_add_sm2_8(s, s, p256_sm2_order, c);
            sp_256_norm_8(s);

            /* xInv = 1/(x+1) mod order */
            sp_256_add_sm2_8(x, x, p256_sm2_norm_order);

                sp_256_mont_inv_order_sm2_8(xInv, x, tmp);
            sp_256_norm_8(xInv);

            /* s = s * (x+1)^-1 mod order */
                sp_256_mont_mul_order_sm2_8(s, s, xInv);
            sp_256_norm_8(s);

            c = sp_256_cmp_sm2_8(s, p256_sm2_order);
            sp_256_cond_sub_sm2_8(s, s, p256_sm2_order,
                0L - (sp_digit)(c >= 0));
            sp_256_norm_8(s);

            /* Check that signature is usable. */
            if (sp_256_iszero_8(s) == 0) {
                break;
            }
        }
    }

    if (i == 0) {
        err = RNG_FAILURE_E;
    }

    if (err == MP_OKAY) {
        err = sp_256_to_mp(r, rm);
    }
    if (err == MP_OKAY) {
        err = sp_256_to_mp(s, sm);
    }

#if (defined(WOLFSSL_SP_SMALL) || defined(WOLFSSL_SMALL_STACK)) && !defined(WOLFSSL_SP_NO_MALLOC)
    if (d != NULL) {
        XMEMSET(d, 0, sizeof(sp_digit) * 8 * 8);
        XFREE(d, heap, DYNAMIC_TYPE_ECC);
    }
    if (point != NULL) {
        XFREE(point, heap, DYNAMIC_TYPE_ECC);
    }
#else
    XMEMSET(e, 0, sizeof(sp_digit) * 2U * 8U);
    XMEMSET(x, 0, sizeof(sp_digit) * 2U * 8U);
    XMEMSET(k, 0, sizeof(sp_digit) * 2U * 8U);
    XMEMSET(r, 0, sizeof(sp_digit) * 2U * 8U);
    XMEMSET(r, 0, sizeof(sp_digit) * 2U * 8U);
    XMEMSET(tmp, 0, sizeof(sp_digit) * 4U * 2U * 8U);
#endif

    return err;
}
#endif /* HAVE_ECC_SIGN */

#ifdef HAVE_ECC_VERIFY
int sp_ecc_verify_sm2_256(const byte* hash, word32 hashLen, const mp_int* pX,
    const mp_int* pY, const mp_int* pZ, const mp_int* rm, const mp_int* sm,
    int* res, void* heap)
{
#if (defined(WOLFSSL_SP_SMALL) || defined(WOLFSSL_SMALL_STACK)) && !defined(WOLFSSL_SP_NO_MALLOC)
    sp_digit* d = NULL;
    sp_point_256* p1 = NULL;
#else
    sp_digit d[8*8 * 7];
    sp_point_256 p1[2];
#endif
    sp_digit* e = NULL;
    sp_digit* r = NULL;
    sp_digit* s = NULL;
    sp_digit* tmp = NULL;
    sp_point_256* p2 = NULL;
    sp_digit carry;
    int err = MP_OKAY;
    int done = 0;

#if (defined(WOLFSSL_SP_SMALL) || defined(WOLFSSL_SMALL_STACK)) && !defined(WOLFSSL_SP_NO_MALLOC)
    if (err == MP_OKAY) {
        d = (sp_digit*)XMALLOC(sizeof(sp_digit) * 20 * 8, heap,
                                                              DYNAMIC_TYPE_ECC);
        if (d == NULL) {
            err = MEMORY_E;
        }
    }

    if (err == MP_OKAY) {
        p1 = (sp_point_256*)XMALLOC(sizeof(sp_point_256) * 2, heap,
            DYNAMIC_TYPE_ECC);
        if (p1 == NULL) {
            err = MEMORY_E;
        }
    }
#endif

    if (err == MP_OKAY) {
        e   = d + 0 * 8;
        r   = d + 2 * 8;
        s   = d + 4 * 8;
        tmp = d + 6 * 8;
        p2 = p1 + 1;

        if (hashLen > 32U) {
            hashLen = 32U;
        }

        sp_256_from_mp(r, 8, rm);
        sp_256_from_mp(s, 8, sm);
        sp_256_from_mp(p2->x, 8, pX);
        sp_256_from_mp(p2->y, 8, pY);
        sp_256_from_mp(p2->z, 8, pZ);


        if (sp_256_iszero_8(r) ||
            sp_256_iszero_8(s) ||
            (sp_256_cmp_sm2_8(r, p256_sm2_order) >= 0) ||
            (sp_256_cmp_sm2_8(s, p256_sm2_order) >= 0)) {
            *res = 0;
            done = 1;
        }
    }

    if ((err == MP_OKAY) && (!done)) {
        carry = sp_256_add_sm2_8(e, r, s);
        sp_256_norm_8(e);
        if (carry || sp_256_cmp_sm2_8(e, p256_sm2_order) >= 0) {
            sp_256_sub_sm2_8(e, e, p256_sm2_order);            sp_256_norm_8(e);
        }

        if (sp_256_iszero_8(e)) {
           *res = 0;
           done = 1;
        }
    }
    if ((err == MP_OKAY) && (!done)) {
            err = sp_256_ecc_mulmod_base_sm2_8(p1, s, 0, 0, heap);
    }
    if ((err == MP_OKAY) && (!done)) {
        {
            err = sp_256_ecc_mulmod_sm2_8(p2, p2, e, 0, 0, heap);
        }
    }

    if ((err == MP_OKAY) && (!done)) {
        {
            sp_256_proj_point_add_sm2_8(p1, p1, p2, tmp);
            if (sp_256_iszero_8(p1->z)) {
                if (sp_256_iszero_8(p1->x) && sp_256_iszero_8(p1->y)) {
                    sp_256_proj_point_dbl_sm2_8(p1, p2, tmp);
                }
                else {
                    /* Y ordinate is not used from here - don't set. */
                    p1->x[0] = 0;
                    p1->x[1] = 0;
                    p1->x[2] = 0;
                    p1->x[3] = 0;
                    p1->x[4] = 0;
                    p1->x[5] = 0;
                    p1->x[6] = 0;
                    p1->x[7] = 0;
                    XMEMCPY(p1->z, p256_sm2_norm_mod, sizeof(p256_sm2_norm_mod));
                }
            }
        }

        /* z' = z'.z' */
        sp_256_mont_sqr_sm2_8(p1->z, p1->z, p256_sm2_mod, p256_sm2_mp_mod);
        XMEMSET(p1->x + 8, 0, 8U * sizeof(sp_digit));
        sp_256_mont_reduce_sm2_8(p1->x, p256_sm2_mod, p256_sm2_mp_mod);
        /* (r - e + n*order).z'.z' mod prime == (s.G + t.Q)->x' */
        /* Load e, subtract from r. */
        sp_256_from_bin(e, 8, hash, (int)hashLen);
        if (sp_256_cmp_sm2_8(r, e) < 0) {
            (void)sp_256_add_sm2_8(r, r, p256_sm2_order);
        }
        sp_256_sub_sm2_8(e, r, e);
        sp_256_norm_8(e);
        /* x' == (r - e).z'.z' mod prime */
        sp_256_mont_mul_sm2_8(s, e, p1->z, p256_sm2_mod, p256_sm2_mp_mod);
        *res = (int)(sp_256_cmp_sm2_8(p1->x, s) == 0);
        if (*res == 0) {
            carry = sp_256_add_sm2_8(e, e, p256_sm2_order);
            if (!carry && sp_256_cmp_sm2_8(e, p256_sm2_mod) < 0) {
                /* x' == (r - e + order).z'.z' mod prime */
                sp_256_mont_mul_sm2_8(s, e, p1->z, p256_sm2_mod, p256_sm2_mp_mod);
                *res = (int)(sp_256_cmp_sm2_8(p1->x, s) == 0);
            }
        }
    }

#if (defined(WOLFSSL_SP_SMALL) || defined(WOLFSSL_SMALL_STACK)) && !defined(WOLFSSL_SP_NO_MALLOC)
    if (d != NULL)
        XFREE(d, heap, DYNAMIC_TYPE_ECC);
    if (p1 != NULL)
        XFREE(p1, heap, DYNAMIC_TYPE_ECC);
#endif

    return err;
}
#endif /* HAVE_ECC_VERIFY */

#ifdef HAVE_ECC_CHECK_KEY
/* Check that the x and y ordinates are a valid point on the curve.
 *
 * point  EC point.
 * heap   Heap to use if dynamically allocating.
 * returns MEMORY_E if dynamic memory allocation fails, MP_VAL if the point is
 * not on the curve and MP_OKAY otherwise.
 */
static int sp_256_ecc_is_point_sm2_8(const sp_point_256* point,
    void* heap)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_digit* t1 = NULL;
#else
    sp_digit t1[8 * 4];
#endif
    sp_digit* t2 = NULL;
    int err = MP_OKAY;

#ifdef WOLFSSL_SP_SMALL_STACK
    t1 = (sp_digit*)XMALLOC(sizeof(sp_digit) * 8 * 4, heap, DYNAMIC_TYPE_ECC);
    if (t1 == NULL)
        err = MEMORY_E;
#endif
    (void)heap;

    if (err == MP_OKAY) {
        t2 = t1 + 2 * 8;

        /* y^2 - x^3 - a.x = b */
        sp_256_sqr_sm2_8(t1, point->y);
        (void)sp_256_mod_sm2_8(t1, t1, p256_sm2_mod);
        sp_256_sqr_sm2_8(t2, point->x);
        (void)sp_256_mod_sm2_8(t2, t2, p256_sm2_mod);
        sp_256_mul_sm2_8(t2, t2, point->x);
        (void)sp_256_mod_sm2_8(t2, t2, p256_sm2_mod);
        sp_256_mont_sub_sm2_8(t1, t1, t2, p256_sm2_mod);

        /* y^2 - x^3 + 3.x = b, when a = -3  */
        sp_256_mont_add_sm2_8(t1, t1, point->x, p256_sm2_mod);
        sp_256_mont_add_sm2_8(t1, t1, point->x, p256_sm2_mod);
        sp_256_mont_add_sm2_8(t1, t1, point->x, p256_sm2_mod);


        if (sp_256_cmp_sm2_8(t1, p256_sm2_b) != 0) {
            err = MP_VAL;
        }
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(t1, heap, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

/* Check that the x and y ordinates are a valid point on the curve.
 *
 * pX  X ordinate of EC point.
 * pY  Y ordinate of EC point.
 * returns MEMORY_E if dynamic memory allocation fails, MP_VAL if the point is
 * not on the curve and MP_OKAY otherwise.
 */
int sp_ecc_is_point_sm2_256(const mp_int* pX, const mp_int* pY)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_point_256* pub = NULL;
#else
    sp_point_256 pub[1];
#endif
    const byte one[1] = { 1 };
    int err = MP_OKAY;

#ifdef WOLFSSL_SP_SMALL_STACK
    pub = (sp_point_256*)XMALLOC(sizeof(sp_point_256), NULL,
                                       DYNAMIC_TYPE_ECC);
    if (pub == NULL)
        err = MEMORY_E;
#endif

    if (err == MP_OKAY) {
        sp_256_from_mp(pub->x, 8, pX);
        sp_256_from_mp(pub->y, 8, pY);
        sp_256_from_bin(pub->z, 8, one, (int)sizeof(one));

        err = sp_256_ecc_is_point_sm2_8(pub, NULL);
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(pub, NULL, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

/* Check that the private scalar generates the EC point (px, py), the point is
 * on the curve and the point has the correct order.
 *
 * pX     X ordinate of EC point.
 * pY     Y ordinate of EC point.
 * privm  Private scalar that generates EC point.
 * returns MEMORY_E if dynamic memory allocation fails, MP_VAL if the point is
 * not on the curve, ECC_INF_E if the point does not have the correct order,
 * ECC_PRIV_KEY_E when the private scalar doesn't generate the EC point and
 * MP_OKAY otherwise.
 */
int sp_ecc_check_key_sm2_256(const mp_int* pX, const mp_int* pY,
    const mp_int* privm, void* heap)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_digit* priv = NULL;
    sp_point_256* pub = NULL;
#else
    sp_digit priv[8];
    sp_point_256 pub[2];
#endif
    sp_point_256* p = NULL;
    const byte one[1] = { 1 };
    int err = MP_OKAY;


    /* Quick check the lengs of public key ordinates and private key are in
     * range. Proper check later.
     */
    if (((mp_count_bits(pX) > 256) ||
        (mp_count_bits(pY) > 256) ||
        ((privm != NULL) && (mp_count_bits(privm) > 256)))) {
        err = ECC_OUT_OF_RANGE_E;
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    if (err == MP_OKAY) {
        pub = (sp_point_256*)XMALLOC(sizeof(sp_point_256) * 2, heap,
                                           DYNAMIC_TYPE_ECC);
        if (pub == NULL)
            err = MEMORY_E;
    }
    if (err == MP_OKAY && privm) {
        priv = (sp_digit*)XMALLOC(sizeof(sp_digit) * 8, heap,
                                  DYNAMIC_TYPE_ECC);
        if (priv == NULL)
            err = MEMORY_E;
    }
#endif

    if (err == MP_OKAY) {
        p = pub + 1;

        sp_256_from_mp(pub->x, 8, pX);
        sp_256_from_mp(pub->y, 8, pY);
        sp_256_from_bin(pub->z, 8, one, (int)sizeof(one));
        if (privm)
            sp_256_from_mp(priv, 8, privm);

        /* Check point at infinitiy. */
        if ((sp_256_iszero_8(pub->x) != 0) &&
            (sp_256_iszero_8(pub->y) != 0)) {
            err = ECC_INF_E;
        }
    }

    /* Check range of X and Y */
    if ((err == MP_OKAY) &&
            ((sp_256_cmp_sm2_8(pub->x, p256_sm2_mod) >= 0) ||
             (sp_256_cmp_sm2_8(pub->y, p256_sm2_mod) >= 0))) {
        err = ECC_OUT_OF_RANGE_E;
    }

    if (err == MP_OKAY) {
        /* Check point is on curve */
        err = sp_256_ecc_is_point_sm2_8(pub, heap);
    }

    if (err == MP_OKAY) {
        /* Point * order = infinity */
            err = sp_256_ecc_mulmod_sm2_8(p, pub, p256_sm2_order, 1, 1, heap);
    }
    /* Check result is infinity */
    if ((err == MP_OKAY) && ((sp_256_iszero_8(p->x) == 0) ||
                             (sp_256_iszero_8(p->y) == 0))) {
        err = ECC_INF_E;
    }

    if (privm) {
        if (err == MP_OKAY) {
            /* Base * private = point */
                err = sp_256_ecc_mulmod_base_sm2_8(p, priv, 1, 1, heap);
        }
        /* Check result is public key */
        if ((err == MP_OKAY) &&
                ((sp_256_cmp_sm2_8(p->x, pub->x) != 0) ||
                 (sp_256_cmp_sm2_8(p->y, pub->y) != 0))) {
            err = ECC_PRIV_KEY_E;
        }
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(pub, heap, DYNAMIC_TYPE_ECC);
    XFREE(priv, heap, DYNAMIC_TYPE_ECC);
#endif

    return err;
}
#endif
#ifdef WOLFSSL_PUBLIC_ECC_ADD_DBL
/* Add two projective EC points together.
 * (pX, pY, pZ) + (qX, qY, qZ) = (rX, rY, rZ)
 *
 * pX   First EC point's X ordinate.
 * pY   First EC point's Y ordinate.
 * pZ   First EC point's Z ordinate.
 * qX   Second EC point's X ordinate.
 * qY   Second EC point's Y ordinate.
 * qZ   Second EC point's Z ordinate.
 * rX   Resultant EC point's X ordinate.
 * rY   Resultant EC point's Y ordinate.
 * rZ   Resultant EC point's Z ordinate.
 * returns MEMORY_E if dynamic memory allocation fails and MP_OKAY otherwise.
 */
int sp_ecc_proj_add_point_sm2_256(mp_int* pX, mp_int* pY, mp_int* pZ,
                              mp_int* qX, mp_int* qY, mp_int* qZ,
                              mp_int* rX, mp_int* rY, mp_int* rZ)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_digit* tmp = NULL;
    sp_point_256* p = NULL;
#else
    sp_digit tmp[2 * 8 * 6];
    sp_point_256 p[2];
#endif
    sp_point_256* q = NULL;
    int err = MP_OKAY;

#ifdef WOLFSSL_SP_SMALL_STACK
    if (err == MP_OKAY) {
        p = (sp_point_256*)XMALLOC(sizeof(sp_point_256) * 2, NULL,
                                         DYNAMIC_TYPE_ECC);
        if (p == NULL)
            err = MEMORY_E;
    }
    if (err == MP_OKAY) {
        tmp = (sp_digit*)XMALLOC(sizeof(sp_digit) * 2 * 8 * 6, NULL,
                                 DYNAMIC_TYPE_ECC);
        if (tmp == NULL) {
            err = MEMORY_E;
        }
    }
#endif

    if (err == MP_OKAY) {
        q = p + 1;

        sp_256_from_mp(p->x, 8, pX);
        sp_256_from_mp(p->y, 8, pY);
        sp_256_from_mp(p->z, 8, pZ);
        sp_256_from_mp(q->x, 8, qX);
        sp_256_from_mp(q->y, 8, qY);
        sp_256_from_mp(q->z, 8, qZ);
        p->infinity = sp_256_iszero_8(p->x) &
                      sp_256_iszero_8(p->y);
        q->infinity = sp_256_iszero_8(q->x) &
                      sp_256_iszero_8(q->y);

            sp_256_proj_point_add_sm2_8(p, p, q, tmp);
    }

    if (err == MP_OKAY) {
        err = sp_256_to_mp(p->x, rX);
    }
    if (err == MP_OKAY) {
        err = sp_256_to_mp(p->y, rY);
    }
    if (err == MP_OKAY) {
        err = sp_256_to_mp(p->z, rZ);
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(tmp, NULL, DYNAMIC_TYPE_ECC);
    XFREE(p, NULL, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

/* Double a projective EC point.
 * (pX, pY, pZ) + (pX, pY, pZ) = (rX, rY, rZ)
 *
 * pX   EC point's X ordinate.
 * pY   EC point's Y ordinate.
 * pZ   EC point's Z ordinate.
 * rX   Resultant EC point's X ordinate.
 * rY   Resultant EC point's Y ordinate.
 * rZ   Resultant EC point's Z ordinate.
 * returns MEMORY_E if dynamic memory allocation fails and MP_OKAY otherwise.
 */
int sp_ecc_proj_dbl_point_sm2_256(mp_int* pX, mp_int* pY, mp_int* pZ,
                              mp_int* rX, mp_int* rY, mp_int* rZ)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_digit* tmp = NULL;
    sp_point_256* p = NULL;
#else
    sp_digit tmp[2 * 8 * 2];
    sp_point_256 p[1];
#endif
    int err = MP_OKAY;

#ifdef WOLFSSL_SP_SMALL_STACK
    if (err == MP_OKAY) {
        p = (sp_point_256*)XMALLOC(sizeof(sp_point_256), NULL,
                                         DYNAMIC_TYPE_ECC);
        if (p == NULL)
            err = MEMORY_E;
    }
    if (err == MP_OKAY) {
        tmp = (sp_digit*)XMALLOC(sizeof(sp_digit) * 2 * 8 * 2, NULL,
                                 DYNAMIC_TYPE_ECC);
        if (tmp == NULL)
            err = MEMORY_E;
    }
#endif

    if (err == MP_OKAY) {
        sp_256_from_mp(p->x, 8, pX);
        sp_256_from_mp(p->y, 8, pY);
        sp_256_from_mp(p->z, 8, pZ);
        p->infinity = sp_256_iszero_8(p->x) &
                      sp_256_iszero_8(p->y);

            sp_256_proj_point_dbl_sm2_8(p, p, tmp);
    }

    if (err == MP_OKAY) {
        err = sp_256_to_mp(p->x, rX);
    }
    if (err == MP_OKAY) {
        err = sp_256_to_mp(p->y, rY);
    }
    if (err == MP_OKAY) {
        err = sp_256_to_mp(p->z, rZ);
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(tmp, NULL, DYNAMIC_TYPE_ECC);
    XFREE(p, NULL, DYNAMIC_TYPE_ECC);
#endif

    return err;
}

/* Map a projective EC point to affine in place.
 * pZ will be one.
 *
 * pX   EC point's X ordinate.
 * pY   EC point's Y ordinate.
 * pZ   EC point's Z ordinate.
 * returns MEMORY_E if dynamic memory allocation fails and MP_OKAY otherwise.
 */
int sp_ecc_map_sm2_256(mp_int* pX, mp_int* pY, mp_int* pZ)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_digit* tmp = NULL;
    sp_point_256* p = NULL;
#else
    sp_digit tmp[2 * 8 * 5];
    sp_point_256 p[1];
#endif
    int err = MP_OKAY;


#ifdef WOLFSSL_SP_SMALL_STACK
    if (err == MP_OKAY) {
        p = (sp_point_256*)XMALLOC(sizeof(sp_point_256), NULL,
                                         DYNAMIC_TYPE_ECC);
        if (p == NULL)
            err = MEMORY_E;
    }
    if (err == MP_OKAY) {
        tmp = (sp_digit*)XMALLOC(sizeof(sp_digit) * 2 * 8 * 5, NULL,
                                 DYNAMIC_TYPE_ECC);
        if (tmp == NULL)
            err = MEMORY_E;
    }
#endif
    if (err == MP_OKAY) {
        sp_256_from_mp(p->x, 8, pX);
        sp_256_from_mp(p->y, 8, pY);
        sp_256_from_mp(p->z, 8, pZ);
        p->infinity = sp_256_iszero_8(p->x) &
                      sp_256_iszero_8(p->y);

            sp_256_map_sm2_8(p, p, tmp);
    }

    if (err == MP_OKAY) {
        err = sp_256_to_mp(p->x, pX);
    }
    if (err == MP_OKAY) {
        err = sp_256_to_mp(p->y, pY);
    }
    if (err == MP_OKAY) {
        err = sp_256_to_mp(p->z, pZ);
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(tmp, NULL, DYNAMIC_TYPE_ECC);
    XFREE(p, NULL, DYNAMIC_TYPE_ECC);
#endif

    return err;
}
#endif /* WOLFSSL_PUBLIC_ECC_ADD_DBL */
#ifdef HAVE_COMP_KEY
/* Square root power for the P256 curve. */
static const uint32_t p256_sm2_sqrt_power[8] = {
    0x00000000,0x40000000,0xc0000000,0xffffffff,0xffffffff,0xffffffff,
    0xbfffffff,0x3fffffff
};

/* Find the square root of a number mod the prime of the curve.
 *
 * y  The number to operate on and the result.
 * returns MEMORY_E if dynamic memory allocation fails and MP_OKAY otherwise.
 */
static int sp_256_mont_sqrt_sm2_8(sp_digit* y)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_digit* t = NULL;
#else
    sp_digit t[2 * 8];
#endif
    int err = MP_OKAY;

#ifdef WOLFSSL_SP_SMALL_STACK
    t = (sp_digit*)XMALLOC(sizeof(sp_digit) * 2 * 8, NULL, DYNAMIC_TYPE_ECC);
    if (t == NULL)
        err = MEMORY_E;
#endif

    if (err == MP_OKAY) {

        {
            int i;

            XMEMCPY(t, y, sizeof(sp_digit) * 8);
            for (i=252; i>=0; i--) {
                sp_256_mont_sqr_sm2_8(t, t, p256_sm2_mod, p256_sm2_mp_mod);
                if (p256_sm2_sqrt_power[i / 32] & ((sp_digit)1 << (i % 32)))
                    sp_256_mont_mul_sm2_8(t, t, y, p256_sm2_mod, p256_sm2_mp_mod);
            }
            XMEMCPY(y, t, sizeof(sp_digit) * 8);
        }
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    if (t != NULL)
        XFREE(t, NULL, DYNAMIC_TYPE_ECC);
#endif

    return err;
}


/* Uncompress the point given the X ordinate.
 *
 * xm    X ordinate.
 * odd   Whether the Y ordinate is odd.
 * ym    Calculated Y ordinate.
 * returns MEMORY_E if dynamic memory allocation fails and MP_OKAY otherwise.
 */
int sp_ecc_uncompress_sm2_256(mp_int* xm, int odd, mp_int* ym)
{
#ifdef WOLFSSL_SP_SMALL_STACK
    sp_digit* x = NULL;
#else
    sp_digit x[4 * 8];
#endif
    sp_digit* y = NULL;
    int err = MP_OKAY;

#ifdef WOLFSSL_SP_SMALL_STACK
    x = (sp_digit*)XMALLOC(sizeof(sp_digit) * 4 * 8, NULL, DYNAMIC_TYPE_ECC);
    if (x == NULL)
        err = MEMORY_E;
#endif

    if (err == MP_OKAY) {
        y = x + 2 * 8;

        sp_256_from_mp(x, 8, xm);
        err = sp_256_mod_mul_norm_sm2_8(x, x, p256_sm2_mod);
    }
    if (err == MP_OKAY) {
        /* y = x^3 */
        {
            sp_256_mont_sqr_sm2_8(y, x, p256_sm2_mod, p256_sm2_mp_mod);
            sp_256_mont_mul_sm2_8(y, y, x, p256_sm2_mod, p256_sm2_mp_mod);
        }
        /* y = x^3 - 3x */
        sp_256_mont_sub_sm2_8(y, y, x, p256_sm2_mod);
        sp_256_mont_sub_sm2_8(y, y, x, p256_sm2_mod);
        sp_256_mont_sub_sm2_8(y, y, x, p256_sm2_mod);
        /* y = x^3 - 3x + b */
        err = sp_256_mod_mul_norm_sm2_8(x, p256_sm2_b, p256_sm2_mod);
    }
    if (err == MP_OKAY) {
        sp_256_mont_add_sm2_8(y, y, x, p256_sm2_mod);
        /* y = sqrt(x^3 - 3x + b) */
        err = sp_256_mont_sqrt_sm2_8(y);
    }
    if (err == MP_OKAY) {
        XMEMSET(y + 8, 0, 8U * sizeof(sp_digit));
        sp_256_mont_reduce_sm2_8(y, p256_sm2_mod, p256_sm2_mp_mod);
        if ((((word32)y[0] ^ (word32)odd) & 1U) != 0U) {
            sp_256_mont_sub_sm2_8(y, p256_sm2_mod, y, p256_sm2_mod);
        }

        err = sp_256_to_mp(y, ym);
    }

#ifdef WOLFSSL_SP_SMALL_STACK
    XFREE(x, NULL, DYNAMIC_TYPE_ECC);
#endif

    return err;
}
#endif
#endif /* WOLFSSL_SP_SM2 */
#endif /* WOLFSSL_HAVE_SP_ECC */
#endif /* WOLFSSL_SP_ARM_CORTEX_M_ASM */
#endif /* WOLFSSL_HAVE_SP_RSA | WOLFSSL_HAVE_SP_DH | WOLFSSL_HAVE_SP_ECC */