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Copy path0072-ChaCha20-performance-optimizations-for-ppc64le.patch
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0072-ChaCha20-performance-optimizations-for-ppc64le.patch
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Upstream-Status: Backport [
https://github.com/openssl/openssl/commit/f596bbe4da779b56eea34d96168b557d78e1149,
https://github.com/openssl/openssl/commit/7e1f3ffcc5bc15fb9a12b9e3bb202f544c6ed5aa,
hunks in crypto/ppccap.c from https://github.com/openssl/openssl/commit/f5485b97b6c9977c0d39c7669b9f97a879312447
]
diff --git a/crypto/chacha/asm/chachap10-ppc.pl b/crypto/chacha/asm/chachap10-ppc.pl
new file mode 100755
index 0000000..36e9a8d
--- /dev/null
+++ b/crypto/chacha/asm/chachap10-ppc.pl
@@ -0,0 +1,1288 @@
+#! /usr/bin/env perl
+# Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the Apache License 2.0 (the "License"). You may not use
+# this file except in compliance with the License. You can obtain a copy
+# in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+
+#
+# ====================================================================
+# Written by Andy Polyakov <[email protected]> for the OpenSSL
+# project. The module is, however, dual licensed under OpenSSL and
+# CRYPTOGAMS licenses depending on where you obtain it. For further
+# details see http://www.openssl.org/~appro/cryptogams/.
+# ====================================================================
+#
+# October 2015
+#
+# ChaCha20 for PowerPC/AltiVec.
+#
+# June 2018
+#
+# Add VSX 2.07 code path. Original 3xAltiVec+1xIALU is well-suited for
+# processors that can't issue more than one vector instruction per
+# cycle. But POWER8 (and POWER9) can issue a pair, and vector-only 4x
+# interleave would perform better. Incidentally PowerISA 2.07 (first
+# implemented by POWER8) defined new usable instructions, hence 4xVSX
+# code path...
+#
+# Performance in cycles per byte out of large buffer.
+#
+# IALU/gcc-4.x 3xAltiVec+1xIALU 4xVSX
+#
+# Freescale e300 13.6/+115% - -
+# PPC74x0/G4e 6.81/+310% 3.81 -
+# PPC970/G5 9.29/+160% ? -
+# POWER7 8.62/+61% 3.35 -
+# POWER8 8.70/+51% 2.91 2.09
+# POWER9 8.80/+29% 4.44(*) 2.45(**)
+#
+# (*) this is trade-off result, it's possible to improve it, but
+# then it would negatively affect all others;
+# (**) POWER9 seems to be "allergic" to mixing vector and integer
+# instructions, which is why switch to vector-only code pays
+# off that much;
+
+# $output is the last argument if it looks like a file (it has an extension)
+# $flavour is the first argument if it doesn't look like a file
+$output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m|\.\w+$| ? pop : undef;
+$flavour = $#ARGV >= 0 && $ARGV[0] !~ m|\.| ? shift : undef;
+
+if ($flavour =~ /64/) {
+ $SIZE_T =8;
+ $LRSAVE =2*$SIZE_T;
+ $STU ="stdu";
+ $POP ="ld";
+ $PUSH ="std";
+ $UCMP ="cmpld";
+} elsif ($flavour =~ /32/) {
+ $SIZE_T =4;
+ $LRSAVE =$SIZE_T;
+ $STU ="stwu";
+ $POP ="lwz";
+ $PUSH ="stw";
+ $UCMP ="cmplw";
+} else { die "nonsense $flavour"; }
+
+$LITTLE_ENDIAN = ($flavour=~/le$/) ? 1 : 0;
+
+$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
+( $xlate="${dir}ppc-xlate.pl" and -f $xlate ) or
+( $xlate="${dir}../../perlasm/ppc-xlate.pl" and -f $xlate) or
+die "can't locate ppc-xlate.pl";
+
+open STDOUT,"| $^X $xlate $flavour \"$output\""
+ or die "can't call $xlate: $!";
+
+$LOCALS=6*$SIZE_T;
+$FRAME=$LOCALS+64+18*$SIZE_T; # 64 is for local variables
+
+sub AUTOLOAD() # thunk [simplified] x86-style perlasm
+{ my $opcode = $AUTOLOAD; $opcode =~ s/.*:://; $opcode =~ s/_/\./;
+ $code .= "\t$opcode\t".join(',',@_)."\n";
+}
+
+my $sp = "r1";
+
+my ($out,$inp,$len,$key,$ctr) = map("r$_",(3..7));
+
+
+{{{
+my ($xa0,$xa1,$xa2,$xa3, $xb0,$xb1,$xb2,$xb3,
+ $xc0,$xc1,$xc2,$xc3, $xd0,$xd1,$xd2,$xd3) = map("v$_",(0..15));
+my @K = map("v$_",(16..19));
+my $CTR = "v26";
+my ($xt0,$xt1,$xt2,$xt3) = map("v$_",(27..30));
+my ($sixteen,$twelve,$eight,$seven) = ($xt0,$xt1,$xt2,$xt3);
+my $beperm = "v31";
+
+my ($x00,$x10,$x20,$x30) = (0, map("r$_",(8..10)));
+
+my $FRAME=$LOCALS+64+7*16; # 7*16 is for v26-v31 offload
+
+
+sub VSX_lane_ROUND_4x {
+my ($a0,$b0,$c0,$d0)=@_;
+my ($a1,$b1,$c1,$d1)=map(($_&~3)+(($_+1)&3),($a0,$b0,$c0,$d0));
+my ($a2,$b2,$c2,$d2)=map(($_&~3)+(($_+1)&3),($a1,$b1,$c1,$d1));
+my ($a3,$b3,$c3,$d3)=map(($_&~3)+(($_+1)&3),($a2,$b2,$c2,$d2));
+my @x=map("\"v$_\"",(0..15));
+
+ (
+ "&vadduwm (@x[$a0],@x[$a0],@x[$b0])", # Q1
+ "&vadduwm (@x[$a1],@x[$a1],@x[$b1])", # Q2
+ "&vadduwm (@x[$a2],@x[$a2],@x[$b2])", # Q3
+ "&vadduwm (@x[$a3],@x[$a3],@x[$b3])", # Q4
+ "&vxor (@x[$d0],@x[$d0],@x[$a0])",
+ "&vxor (@x[$d1],@x[$d1],@x[$a1])",
+ "&vxor (@x[$d2],@x[$d2],@x[$a2])",
+ "&vxor (@x[$d3],@x[$d3],@x[$a3])",
+ "&vrlw (@x[$d0],@x[$d0],'$sixteen')",
+ "&vrlw (@x[$d1],@x[$d1],'$sixteen')",
+ "&vrlw (@x[$d2],@x[$d2],'$sixteen')",
+ "&vrlw (@x[$d3],@x[$d3],'$sixteen')",
+
+ "&vadduwm (@x[$c0],@x[$c0],@x[$d0])",
+ "&vadduwm (@x[$c1],@x[$c1],@x[$d1])",
+ "&vadduwm (@x[$c2],@x[$c2],@x[$d2])",
+ "&vadduwm (@x[$c3],@x[$c3],@x[$d3])",
+ "&vxor (@x[$b0],@x[$b0],@x[$c0])",
+ "&vxor (@x[$b1],@x[$b1],@x[$c1])",
+ "&vxor (@x[$b2],@x[$b2],@x[$c2])",
+ "&vxor (@x[$b3],@x[$b3],@x[$c3])",
+ "&vrlw (@x[$b0],@x[$b0],'$twelve')",
+ "&vrlw (@x[$b1],@x[$b1],'$twelve')",
+ "&vrlw (@x[$b2],@x[$b2],'$twelve')",
+ "&vrlw (@x[$b3],@x[$b3],'$twelve')",
+
+ "&vadduwm (@x[$a0],@x[$a0],@x[$b0])",
+ "&vadduwm (@x[$a1],@x[$a1],@x[$b1])",
+ "&vadduwm (@x[$a2],@x[$a2],@x[$b2])",
+ "&vadduwm (@x[$a3],@x[$a3],@x[$b3])",
+ "&vxor (@x[$d0],@x[$d0],@x[$a0])",
+ "&vxor (@x[$d1],@x[$d1],@x[$a1])",
+ "&vxor (@x[$d2],@x[$d2],@x[$a2])",
+ "&vxor (@x[$d3],@x[$d3],@x[$a3])",
+ "&vrlw (@x[$d0],@x[$d0],'$eight')",
+ "&vrlw (@x[$d1],@x[$d1],'$eight')",
+ "&vrlw (@x[$d2],@x[$d2],'$eight')",
+ "&vrlw (@x[$d3],@x[$d3],'$eight')",
+
+ "&vadduwm (@x[$c0],@x[$c0],@x[$d0])",
+ "&vadduwm (@x[$c1],@x[$c1],@x[$d1])",
+ "&vadduwm (@x[$c2],@x[$c2],@x[$d2])",
+ "&vadduwm (@x[$c3],@x[$c3],@x[$d3])",
+ "&vxor (@x[$b0],@x[$b0],@x[$c0])",
+ "&vxor (@x[$b1],@x[$b1],@x[$c1])",
+ "&vxor (@x[$b2],@x[$b2],@x[$c2])",
+ "&vxor (@x[$b3],@x[$b3],@x[$c3])",
+ "&vrlw (@x[$b0],@x[$b0],'$seven')",
+ "&vrlw (@x[$b1],@x[$b1],'$seven')",
+ "&vrlw (@x[$b2],@x[$b2],'$seven')",
+ "&vrlw (@x[$b3],@x[$b3],'$seven')"
+ );
+}
+
+$code.=<<___;
+
+.globl .ChaCha20_ctr32_vsx_p10
+.align 5
+.ChaCha20_ctr32_vsx_p10:
+ ${UCMP}i $len,255
+ bgt ChaCha20_ctr32_vsx_8x
+ $STU $sp,-$FRAME($sp)
+ mflr r0
+ li r10,`15+$LOCALS+64`
+ li r11,`31+$LOCALS+64`
+ mfspr r12,256
+ stvx v26,r10,$sp
+ addi r10,r10,32
+ stvx v27,r11,$sp
+ addi r11,r11,32
+ stvx v28,r10,$sp
+ addi r10,r10,32
+ stvx v29,r11,$sp
+ addi r11,r11,32
+ stvx v30,r10,$sp
+ stvx v31,r11,$sp
+ stw r12,`$FRAME-4`($sp) # save vrsave
+ li r12,-4096+63
+ $PUSH r0, `$FRAME+$LRSAVE`($sp)
+ mtspr 256,r12 # preserve 29 AltiVec registers
+
+ bl Lconsts # returns pointer Lsigma in r12
+ lvx_4w @K[0],0,r12 # load sigma
+ addi r12,r12,0x70
+ li $x10,16
+ li $x20,32
+ li $x30,48
+ li r11,64
+
+ lvx_4w @K[1],0,$key # load key
+ lvx_4w @K[2],$x10,$key
+ lvx_4w @K[3],0,$ctr # load counter
+
+ vxor $xt0,$xt0,$xt0
+ lvx_4w $xt1,r11,r12
+ vspltw $CTR,@K[3],0
+ vsldoi @K[3],@K[3],$xt0,4
+ vsldoi @K[3],$xt0,@K[3],12 # clear @K[3].word[0]
+ vadduwm $CTR,$CTR,$xt1
+
+ be?lvsl $beperm,0,$x10 # 0x00..0f
+ be?vspltisb $xt0,3 # 0x03..03
+ be?vxor $beperm,$beperm,$xt0 # swap bytes within words
+
+ li r0,10 # inner loop counter
+ mtctr r0
+ b Loop_outer_vsx
+
+.align 5
+Loop_outer_vsx:
+ lvx $xa0,$x00,r12 # load [smashed] sigma
+ lvx $xa1,$x10,r12
+ lvx $xa2,$x20,r12
+ lvx $xa3,$x30,r12
+
+ vspltw $xb0,@K[1],0 # smash the key
+ vspltw $xb1,@K[1],1
+ vspltw $xb2,@K[1],2
+ vspltw $xb3,@K[1],3
+
+ vspltw $xc0,@K[2],0
+ vspltw $xc1,@K[2],1
+ vspltw $xc2,@K[2],2
+ vspltw $xc3,@K[2],3
+
+ vmr $xd0,$CTR # smash the counter
+ vspltw $xd1,@K[3],1
+ vspltw $xd2,@K[3],2
+ vspltw $xd3,@K[3],3
+
+ vspltisw $sixteen,-16 # synthesize constants
+ vspltisw $twelve,12
+ vspltisw $eight,8
+ vspltisw $seven,7
+
+Loop_vsx_4x:
+___
+ foreach (&VSX_lane_ROUND_4x(0, 4, 8,12)) { eval; }
+ foreach (&VSX_lane_ROUND_4x(0, 5,10,15)) { eval; }
+$code.=<<___;
+
+ bdnz Loop_vsx_4x
+
+ vadduwm $xd0,$xd0,$CTR
+
+ vmrgew $xt0,$xa0,$xa1 # transpose data
+ vmrgew $xt1,$xa2,$xa3
+ vmrgow $xa0,$xa0,$xa1
+ vmrgow $xa2,$xa2,$xa3
+ vmrgew $xt2,$xb0,$xb1
+ vmrgew $xt3,$xb2,$xb3
+ vpermdi $xa1,$xa0,$xa2,0b00
+ vpermdi $xa3,$xa0,$xa2,0b11
+ vpermdi $xa0,$xt0,$xt1,0b00
+ vpermdi $xa2,$xt0,$xt1,0b11
+
+ vmrgow $xb0,$xb0,$xb1
+ vmrgow $xb2,$xb2,$xb3
+ vmrgew $xt0,$xc0,$xc1
+ vmrgew $xt1,$xc2,$xc3
+ vpermdi $xb1,$xb0,$xb2,0b00
+ vpermdi $xb3,$xb0,$xb2,0b11
+ vpermdi $xb0,$xt2,$xt3,0b00
+ vpermdi $xb2,$xt2,$xt3,0b11
+
+ vmrgow $xc0,$xc0,$xc1
+ vmrgow $xc2,$xc2,$xc3
+ vmrgew $xt2,$xd0,$xd1
+ vmrgew $xt3,$xd2,$xd3
+ vpermdi $xc1,$xc0,$xc2,0b00
+ vpermdi $xc3,$xc0,$xc2,0b11
+ vpermdi $xc0,$xt0,$xt1,0b00
+ vpermdi $xc2,$xt0,$xt1,0b11
+
+ vmrgow $xd0,$xd0,$xd1
+ vmrgow $xd2,$xd2,$xd3
+ vspltisw $xt0,4
+ vadduwm $CTR,$CTR,$xt0 # next counter value
+ vpermdi $xd1,$xd0,$xd2,0b00
+ vpermdi $xd3,$xd0,$xd2,0b11
+ vpermdi $xd0,$xt2,$xt3,0b00
+ vpermdi $xd2,$xt2,$xt3,0b11
+
+ vadduwm $xa0,$xa0,@K[0]
+ vadduwm $xb0,$xb0,@K[1]
+ vadduwm $xc0,$xc0,@K[2]
+ vadduwm $xd0,$xd0,@K[3]
+
+ be?vperm $xa0,$xa0,$xa0,$beperm
+ be?vperm $xb0,$xb0,$xb0,$beperm
+ be?vperm $xc0,$xc0,$xc0,$beperm
+ be?vperm $xd0,$xd0,$xd0,$beperm
+
+ ${UCMP}i $len,0x40
+ blt Ltail_vsx
+
+ lvx_4w $xt0,$x00,$inp
+ lvx_4w $xt1,$x10,$inp
+ lvx_4w $xt2,$x20,$inp
+ lvx_4w $xt3,$x30,$inp
+
+ vxor $xt0,$xt0,$xa0
+ vxor $xt1,$xt1,$xb0
+ vxor $xt2,$xt2,$xc0
+ vxor $xt3,$xt3,$xd0
+
+ stvx_4w $xt0,$x00,$out
+ stvx_4w $xt1,$x10,$out
+ addi $inp,$inp,0x40
+ stvx_4w $xt2,$x20,$out
+ subi $len,$len,0x40
+ stvx_4w $xt3,$x30,$out
+ addi $out,$out,0x40
+ beq Ldone_vsx
+
+ vadduwm $xa0,$xa1,@K[0]
+ vadduwm $xb0,$xb1,@K[1]
+ vadduwm $xc0,$xc1,@K[2]
+ vadduwm $xd0,$xd1,@K[3]
+
+ be?vperm $xa0,$xa0,$xa0,$beperm
+ be?vperm $xb0,$xb0,$xb0,$beperm
+ be?vperm $xc0,$xc0,$xc0,$beperm
+ be?vperm $xd0,$xd0,$xd0,$beperm
+
+ ${UCMP}i $len,0x40
+ blt Ltail_vsx
+
+ lvx_4w $xt0,$x00,$inp
+ lvx_4w $xt1,$x10,$inp
+ lvx_4w $xt2,$x20,$inp
+ lvx_4w $xt3,$x30,$inp
+
+ vxor $xt0,$xt0,$xa0
+ vxor $xt1,$xt1,$xb0
+ vxor $xt2,$xt2,$xc0
+ vxor $xt3,$xt3,$xd0
+
+ stvx_4w $xt0,$x00,$out
+ stvx_4w $xt1,$x10,$out
+ addi $inp,$inp,0x40
+ stvx_4w $xt2,$x20,$out
+ subi $len,$len,0x40
+ stvx_4w $xt3,$x30,$out
+ addi $out,$out,0x40
+ beq Ldone_vsx
+
+ vadduwm $xa0,$xa2,@K[0]
+ vadduwm $xb0,$xb2,@K[1]
+ vadduwm $xc0,$xc2,@K[2]
+ vadduwm $xd0,$xd2,@K[3]
+
+ be?vperm $xa0,$xa0,$xa0,$beperm
+ be?vperm $xb0,$xb0,$xb0,$beperm
+ be?vperm $xc0,$xc0,$xc0,$beperm
+ be?vperm $xd0,$xd0,$xd0,$beperm
+
+ ${UCMP}i $len,0x40
+ blt Ltail_vsx
+
+ lvx_4w $xt0,$x00,$inp
+ lvx_4w $xt1,$x10,$inp
+ lvx_4w $xt2,$x20,$inp
+ lvx_4w $xt3,$x30,$inp
+
+ vxor $xt0,$xt0,$xa0
+ vxor $xt1,$xt1,$xb0
+ vxor $xt2,$xt2,$xc0
+ vxor $xt3,$xt3,$xd0
+
+ stvx_4w $xt0,$x00,$out
+ stvx_4w $xt1,$x10,$out
+ addi $inp,$inp,0x40
+ stvx_4w $xt2,$x20,$out
+ subi $len,$len,0x40
+ stvx_4w $xt3,$x30,$out
+ addi $out,$out,0x40
+ beq Ldone_vsx
+
+ vadduwm $xa0,$xa3,@K[0]
+ vadduwm $xb0,$xb3,@K[1]
+ vadduwm $xc0,$xc3,@K[2]
+ vadduwm $xd0,$xd3,@K[3]
+
+ be?vperm $xa0,$xa0,$xa0,$beperm
+ be?vperm $xb0,$xb0,$xb0,$beperm
+ be?vperm $xc0,$xc0,$xc0,$beperm
+ be?vperm $xd0,$xd0,$xd0,$beperm
+
+ ${UCMP}i $len,0x40
+ blt Ltail_vsx
+
+ lvx_4w $xt0,$x00,$inp
+ lvx_4w $xt1,$x10,$inp
+ lvx_4w $xt2,$x20,$inp
+ lvx_4w $xt3,$x30,$inp
+
+ vxor $xt0,$xt0,$xa0
+ vxor $xt1,$xt1,$xb0
+ vxor $xt2,$xt2,$xc0
+ vxor $xt3,$xt3,$xd0
+
+ stvx_4w $xt0,$x00,$out
+ stvx_4w $xt1,$x10,$out
+ addi $inp,$inp,0x40
+ stvx_4w $xt2,$x20,$out
+ subi $len,$len,0x40
+ stvx_4w $xt3,$x30,$out
+ addi $out,$out,0x40
+ mtctr r0
+ bne Loop_outer_vsx
+
+Ldone_vsx:
+ lwz r12,`$FRAME-4`($sp) # pull vrsave
+ li r10,`15+$LOCALS+64`
+ li r11,`31+$LOCALS+64`
+ $POP r0, `$FRAME+$LRSAVE`($sp)
+ mtspr 256,r12 # restore vrsave
+ lvx v26,r10,$sp
+ addi r10,r10,32
+ lvx v27,r11,$sp
+ addi r11,r11,32
+ lvx v28,r10,$sp
+ addi r10,r10,32
+ lvx v29,r11,$sp
+ addi r11,r11,32
+ lvx v30,r10,$sp
+ lvx v31,r11,$sp
+ mtlr r0
+ addi $sp,$sp,$FRAME
+ blr
+
+.align 4
+Ltail_vsx:
+ addi r11,$sp,$LOCALS
+ mtctr $len
+ stvx_4w $xa0,$x00,r11 # offload block to stack
+ stvx_4w $xb0,$x10,r11
+ stvx_4w $xc0,$x20,r11
+ stvx_4w $xd0,$x30,r11
+ subi r12,r11,1 # prepare for *++ptr
+ subi $inp,$inp,1
+ subi $out,$out,1
+
+Loop_tail_vsx:
+ lbzu r6,1(r12)
+ lbzu r7,1($inp)
+ xor r6,r6,r7
+ stbu r6,1($out)
+ bdnz Loop_tail_vsx
+
+ stvx_4w $K[0],$x00,r11 # wipe copy of the block
+ stvx_4w $K[0],$x10,r11
+ stvx_4w $K[0],$x20,r11
+ stvx_4w $K[0],$x30,r11
+
+ b Ldone_vsx
+ .long 0
+ .byte 0,12,0x04,1,0x80,0,5,0
+ .long 0
+.size .ChaCha20_ctr32_vsx_p10,.-.ChaCha20_ctr32_vsx_p10
+___
+}}}
+
+##This is 8 block in parallel implementation. The heart of chacha round uses vector instruction that has access to
+# vsr[32+X]. To perform the 8 parallel block we tend to use all 32 register to hold the 8 block info.
+# WE need to store few register value on side, so we can use VSR{32+X} for few vector instructions used in round op and hold intermediate value.
+# WE use the VSR[0]-VSR[31] for holding intermediate value and perform 8 block in parallel.
+#
+{{{
+#### ($out,$inp,$len,$key,$ctr) = map("r$_",(3..7));
+my ($xa0,$xa1,$xa2,$xa3, $xb0,$xb1,$xb2,$xb3,
+ $xc0,$xc1,$xc2,$xc3, $xd0,$xd1,$xd2,$xd3,
+ $xa4,$xa5,$xa6,$xa7, $xb4,$xb5,$xb6,$xb7,
+ $xc4,$xc5,$xc6,$xc7, $xd4,$xd5,$xd6,$xd7) = map("v$_",(0..31));
+my ($xcn4,$xcn5,$xcn6,$xcn7, $xdn4,$xdn5,$xdn6,$xdn7) = map("v$_",(8..15));
+my ($xan0,$xbn0,$xcn0,$xdn0) = map("v$_",(0..3));
+my @K = map("v$_",27,(24..26));
+my ($xt0,$xt1,$xt2,$xt3,$xt4) = map("v$_",23,(28..31));
+my $xr0 = "v4";
+my $CTR0 = "v22";
+my $CTR1 = "v5";
+my $beperm = "v31";
+my ($x00,$x10,$x20,$x30) = (0, map("r$_",(8..10)));
+my ($xv0,$xv1,$xv2,$xv3,$xv4,$xv5,$xv6,$xv7) = map("v$_",(0..7));
+my ($xv8,$xv9,$xv10,$xv11,$xv12,$xv13,$xv14,$xv15,$xv16,$xv17) = map("v$_",(8..17));
+my ($xv18,$xv19,$xv20,$xv21) = map("v$_",(18..21));
+my ($xv22,$xv23,$xv24,$xv25,$xv26) = map("v$_",(22..26));
+
+my $FRAME=$LOCALS+64+9*16; # 8*16 is for v24-v31 offload
+
+sub VSX_lane_ROUND_8x {
+my ($a0,$b0,$c0,$d0,$a4,$b4,$c4,$d4)=@_;
+my ($a1,$b1,$c1,$d1)=map(($_&~3)+(($_+1)&3),($a0,$b0,$c0,$d0));
+my ($a2,$b2,$c2,$d2)=map(($_&~3)+(($_+1)&3),($a1,$b1,$c1,$d1));
+my ($a3,$b3,$c3,$d3)=map(($_&~3)+(($_+1)&3),($a2,$b2,$c2,$d2));
+my ($a5,$b5,$c5,$d5)=map(($_&~3)+(($_+1)&3),($a4,$b4,$c4,$d4));
+my ($a6,$b6,$c6,$d6)=map(($_&~3)+(($_+1)&3),($a5,$b5,$c5,$d5));
+my ($a7,$b7,$c7,$d7)=map(($_&~3)+(($_+1)&3),($a6,$b6,$c6,$d6));
+my ($xv8,$xv9,$xv10,$xv11,$xv12,$xv13,$xv14,$xv15,$xv16,$xv17) = map("\"v$_\"",(8..17));
+my @x=map("\"v$_\"",(0..31));
+
+ (
+ "&vxxlor ($xv15 ,@x[$c7],@x[$c7])", #copy v30 to v13
+ "&vxxlorc (@x[$c7], $xv9,$xv9)",
+
+ "&vadduwm (@x[$a0],@x[$a0],@x[$b0])", # Q1
+ "&vadduwm (@x[$a1],@x[$a1],@x[$b1])", # Q2
+ "&vadduwm (@x[$a2],@x[$a2],@x[$b2])", # Q3
+ "&vadduwm (@x[$a3],@x[$a3],@x[$b3])", # Q4
+ "&vadduwm (@x[$a4],@x[$a4],@x[$b4])", # Q1
+ "&vadduwm (@x[$a5],@x[$a5],@x[$b5])", # Q2
+ "&vadduwm (@x[$a6],@x[$a6],@x[$b6])", # Q3
+ "&vadduwm (@x[$a7],@x[$a7],@x[$b7])", # Q4
+
+ "&vxor (@x[$d0],@x[$d0],@x[$a0])",
+ "&vxor (@x[$d1],@x[$d1],@x[$a1])",
+ "&vxor (@x[$d2],@x[$d2],@x[$a2])",
+ "&vxor (@x[$d3],@x[$d3],@x[$a3])",
+ "&vxor (@x[$d4],@x[$d4],@x[$a4])",
+ "&vxor (@x[$d5],@x[$d5],@x[$a5])",
+ "&vxor (@x[$d6],@x[$d6],@x[$a6])",
+ "&vxor (@x[$d7],@x[$d7],@x[$a7])",
+
+ "&vrlw (@x[$d0],@x[$d0],@x[$c7])",
+ "&vrlw (@x[$d1],@x[$d1],@x[$c7])",
+ "&vrlw (@x[$d2],@x[$d2],@x[$c7])",
+ "&vrlw (@x[$d3],@x[$d3],@x[$c7])",
+ "&vrlw (@x[$d4],@x[$d4],@x[$c7])",
+ "&vrlw (@x[$d5],@x[$d5],@x[$c7])",
+ "&vrlw (@x[$d6],@x[$d6],@x[$c7])",
+ "&vrlw (@x[$d7],@x[$d7],@x[$c7])",
+
+ "&vxxlor ($xv13 ,@x[$a7],@x[$a7])",
+ "&vxxlorc (@x[$c7], $xv15,$xv15)",
+ "&vxxlorc (@x[$a7], $xv10,$xv10)",
+
+ "&vadduwm (@x[$c0],@x[$c0],@x[$d0])",
+ "&vadduwm (@x[$c1],@x[$c1],@x[$d1])",
+ "&vadduwm (@x[$c2],@x[$c2],@x[$d2])",
+ "&vadduwm (@x[$c3],@x[$c3],@x[$d3])",
+ "&vadduwm (@x[$c4],@x[$c4],@x[$d4])",
+ "&vadduwm (@x[$c5],@x[$c5],@x[$d5])",
+ "&vadduwm (@x[$c6],@x[$c6],@x[$d6])",
+ "&vadduwm (@x[$c7],@x[$c7],@x[$d7])",
+
+ "&vxor (@x[$b0],@x[$b0],@x[$c0])",
+ "&vxor (@x[$b1],@x[$b1],@x[$c1])",
+ "&vxor (@x[$b2],@x[$b2],@x[$c2])",
+ "&vxor (@x[$b3],@x[$b3],@x[$c3])",
+ "&vxor (@x[$b4],@x[$b4],@x[$c4])",
+ "&vxor (@x[$b5],@x[$b5],@x[$c5])",
+ "&vxor (@x[$b6],@x[$b6],@x[$c6])",
+ "&vxor (@x[$b7],@x[$b7],@x[$c7])",
+
+ "&vrlw (@x[$b0],@x[$b0],@x[$a7])",
+ "&vrlw (@x[$b1],@x[$b1],@x[$a7])",
+ "&vrlw (@x[$b2],@x[$b2],@x[$a7])",
+ "&vrlw (@x[$b3],@x[$b3],@x[$a7])",
+ "&vrlw (@x[$b4],@x[$b4],@x[$a7])",
+ "&vrlw (@x[$b5],@x[$b5],@x[$a7])",
+ "&vrlw (@x[$b6],@x[$b6],@x[$a7])",
+ "&vrlw (@x[$b7],@x[$b7],@x[$a7])",
+
+ "&vxxlorc (@x[$a7], $xv13,$xv13)",
+ "&vxxlor ($xv15 ,@x[$c7],@x[$c7])",
+ "&vxxlorc (@x[$c7], $xv11,$xv11)",
+
+
+ "&vadduwm (@x[$a0],@x[$a0],@x[$b0])",
+ "&vadduwm (@x[$a1],@x[$a1],@x[$b1])",
+ "&vadduwm (@x[$a2],@x[$a2],@x[$b2])",
+ "&vadduwm (@x[$a3],@x[$a3],@x[$b3])",
+ "&vadduwm (@x[$a4],@x[$a4],@x[$b4])",
+ "&vadduwm (@x[$a5],@x[$a5],@x[$b5])",
+ "&vadduwm (@x[$a6],@x[$a6],@x[$b6])",
+ "&vadduwm (@x[$a7],@x[$a7],@x[$b7])",
+
+ "&vxor (@x[$d0],@x[$d0],@x[$a0])",
+ "&vxor (@x[$d1],@x[$d1],@x[$a1])",
+ "&vxor (@x[$d2],@x[$d2],@x[$a2])",
+ "&vxor (@x[$d3],@x[$d3],@x[$a3])",
+ "&vxor (@x[$d4],@x[$d4],@x[$a4])",
+ "&vxor (@x[$d5],@x[$d5],@x[$a5])",
+ "&vxor (@x[$d6],@x[$d6],@x[$a6])",
+ "&vxor (@x[$d7],@x[$d7],@x[$a7])",
+
+ "&vrlw (@x[$d0],@x[$d0],@x[$c7])",
+ "&vrlw (@x[$d1],@x[$d1],@x[$c7])",
+ "&vrlw (@x[$d2],@x[$d2],@x[$c7])",
+ "&vrlw (@x[$d3],@x[$d3],@x[$c7])",
+ "&vrlw (@x[$d4],@x[$d4],@x[$c7])",
+ "&vrlw (@x[$d5],@x[$d5],@x[$c7])",
+ "&vrlw (@x[$d6],@x[$d6],@x[$c7])",
+ "&vrlw (@x[$d7],@x[$d7],@x[$c7])",
+
+ "&vxxlorc (@x[$c7], $xv15,$xv15)",
+ "&vxxlor ($xv13 ,@x[$a7],@x[$a7])",
+ "&vxxlorc (@x[$a7], $xv12,$xv12)",
+
+ "&vadduwm (@x[$c0],@x[$c0],@x[$d0])",
+ "&vadduwm (@x[$c1],@x[$c1],@x[$d1])",
+ "&vadduwm (@x[$c2],@x[$c2],@x[$d2])",
+ "&vadduwm (@x[$c3],@x[$c3],@x[$d3])",
+ "&vadduwm (@x[$c4],@x[$c4],@x[$d4])",
+ "&vadduwm (@x[$c5],@x[$c5],@x[$d5])",
+ "&vadduwm (@x[$c6],@x[$c6],@x[$d6])",
+ "&vadduwm (@x[$c7],@x[$c7],@x[$d7])",
+ "&vxor (@x[$b0],@x[$b0],@x[$c0])",
+ "&vxor (@x[$b1],@x[$b1],@x[$c1])",
+ "&vxor (@x[$b2],@x[$b2],@x[$c2])",
+ "&vxor (@x[$b3],@x[$b3],@x[$c3])",
+ "&vxor (@x[$b4],@x[$b4],@x[$c4])",
+ "&vxor (@x[$b5],@x[$b5],@x[$c5])",
+ "&vxor (@x[$b6],@x[$b6],@x[$c6])",
+ "&vxor (@x[$b7],@x[$b7],@x[$c7])",
+ "&vrlw (@x[$b0],@x[$b0],@x[$a7])",
+ "&vrlw (@x[$b1],@x[$b1],@x[$a7])",
+ "&vrlw (@x[$b2],@x[$b2],@x[$a7])",
+ "&vrlw (@x[$b3],@x[$b3],@x[$a7])",
+ "&vrlw (@x[$b4],@x[$b4],@x[$a7])",
+ "&vrlw (@x[$b5],@x[$b5],@x[$a7])",
+ "&vrlw (@x[$b6],@x[$b6],@x[$a7])",
+ "&vrlw (@x[$b7],@x[$b7],@x[$a7])",
+
+ "&vxxlorc (@x[$a7], $xv13,$xv13)",
+ );
+}
+
+$code.=<<___;
+
+.globl .ChaCha20_ctr32_vsx_8x
+.align 5
+.ChaCha20_ctr32_vsx_8x:
+ $STU $sp,-$FRAME($sp)
+ mflr r0
+ li r10,`15+$LOCALS+64`
+ li r11,`31+$LOCALS+64`
+ mfspr r12,256
+ stvx v24,r10,$sp
+ addi r10,r10,32
+ stvx v25,r11,$sp
+ addi r11,r11,32
+ stvx v26,r10,$sp
+ addi r10,r10,32
+ stvx v27,r11,$sp
+ addi r11,r11,32
+ stvx v28,r10,$sp
+ addi r10,r10,32
+ stvx v29,r11,$sp
+ addi r11,r11,32
+ stvx v30,r10,$sp
+ stvx v31,r11,$sp
+ stw r12,`$FRAME-4`($sp) # save vrsave
+ li r12,-4096+63
+ $PUSH r0, `$FRAME+$LRSAVE`($sp)
+ mtspr 256,r12 # preserve 29 AltiVec registers
+
+ bl Lconsts # returns pointer Lsigma in r12
+
+ lvx_4w @K[0],0,r12 # load sigma
+ addi r12,r12,0x70
+ li $x10,16
+ li $x20,32
+ li $x30,48
+ li r11,64
+
+ vspltisw $xa4,-16 # synthesize constants
+ vspltisw $xb4,12 # synthesize constants
+ vspltisw $xc4,8 # synthesize constants
+ vspltisw $xd4,7 # synthesize constants
+
+ lvx $xa0,$x00,r12 # load [smashed] sigma
+ lvx $xa1,$x10,r12
+ lvx $xa2,$x20,r12
+ lvx $xa3,$x30,r12
+
+ vxxlor $xv9 ,$xa4,$xa4 #save shift val in vr9-12
+ vxxlor $xv10 ,$xb4,$xb4
+ vxxlor $xv11 ,$xc4,$xc4
+ vxxlor $xv12 ,$xd4,$xd4
+ vxxlor $xv22 ,$xa0,$xa0 #save sigma in vr22-25
+ vxxlor $xv23 ,$xa1,$xa1
+ vxxlor $xv24 ,$xa2,$xa2
+ vxxlor $xv25 ,$xa3,$xa3
+
+ lvx_4w @K[1],0,$key # load key
+ lvx_4w @K[2],$x10,$key
+ lvx_4w @K[3],0,$ctr # load counter
+ vspltisw $xt3,4
+
+
+ vxor $xt2,$xt2,$xt2
+ lvx_4w $xt1,r11,r12
+ vspltw $xa2,@K[3],0 #save the original count after spltw
+ vsldoi @K[3],@K[3],$xt2,4
+ vsldoi @K[3],$xt2,@K[3],12 # clear @K[3].word[0]
+ vadduwm $xt1,$xa2,$xt1
+ vadduwm $xt3,$xt1,$xt3 # next counter value
+ vspltw $xa0,@K[2],2 # save the K[2] spltw 2 and save v8.
+
+ be?lvsl $beperm,0,$x10 # 0x00..0f
+ be?vspltisb $xt0,3 # 0x03..03
+ be?vxor $beperm,$beperm,$xt0 # swap bytes within words
+ be?vxxlor $xv26 ,$beperm,$beperm
+
+ vxxlor $xv0 ,@K[0],@K[0] # K0,k1,k2 to vr0,1,2
+ vxxlor $xv1 ,@K[1],@K[1]
+ vxxlor $xv2 ,@K[2],@K[2]
+ vxxlor $xv3 ,@K[3],@K[3]
+ vxxlor $xv4 ,$xt1,$xt1 #CTR ->4, CTR+4-> 5
+ vxxlor $xv5 ,$xt3,$xt3
+ vxxlor $xv8 ,$xa0,$xa0
+
+ li r0,10 # inner loop counter
+ mtctr r0
+ b Loop_outer_vsx_8x
+
+.align 5
+Loop_outer_vsx_8x:
+ vxxlorc $xa0,$xv22,$xv22 # load [smashed] sigma
+ vxxlorc $xa1,$xv23,$xv23
+ vxxlorc $xa2,$xv24,$xv24
+ vxxlorc $xa3,$xv25,$xv25
+ vxxlorc $xa4,$xv22,$xv22
+ vxxlorc $xa5,$xv23,$xv23
+ vxxlorc $xa6,$xv24,$xv24
+ vxxlorc $xa7,$xv25,$xv25
+
+ vspltw $xb0,@K[1],0 # smash the key
+ vspltw $xb1,@K[1],1
+ vspltw $xb2,@K[1],2
+ vspltw $xb3,@K[1],3
+ vspltw $xb4,@K[1],0 # smash the key
+ vspltw $xb5,@K[1],1
+ vspltw $xb6,@K[1],2
+ vspltw $xb7,@K[1],3
+
+ vspltw $xc0,@K[2],0
+ vspltw $xc1,@K[2],1
+ vspltw $xc2,@K[2],2
+ vspltw $xc3,@K[2],3
+ vspltw $xc4,@K[2],0
+ vspltw $xc7,@K[2],3
+ vspltw $xc5,@K[2],1
+
+ vxxlorc $xd0,$xv4,$xv4 # smash the counter
+ vspltw $xd1,@K[3],1
+ vspltw $xd2,@K[3],2
+ vspltw $xd3,@K[3],3
+ vxxlorc $xd4,$xv5,$xv5 # smash the counter
+ vspltw $xd5,@K[3],1
+ vspltw $xd6,@K[3],2
+ vspltw $xd7,@K[3],3
+ vxxlorc $xc6,$xv8,$xv8 #copy of vlspt k[2],2 is in v8.v26 ->k[3] so need to wait until k3 is done
+
+Loop_vsx_8x:
+___
+ foreach (&VSX_lane_ROUND_8x(0,4, 8,12,16,20,24,28)) { eval; }
+ foreach (&VSX_lane_ROUND_8x(0,5,10,15,16,21,26,31)) { eval; }
+$code.=<<___;
+
+ bdnz Loop_vsx_8x
+ vxxlor $xv13 ,$xd4,$xd4 # save the register vr24-31
+ vxxlor $xv14 ,$xd5,$xd5 #
+ vxxlor $xv15 ,$xd6,$xd6 #
+ vxxlor $xv16 ,$xd7,$xd7 #
+
+ vxxlor $xv18 ,$xc4,$xc4 #
+ vxxlor $xv19 ,$xc5,$xc5 #
+ vxxlor $xv20 ,$xc6,$xc6 #
+ vxxlor $xv21 ,$xc7,$xc7 #
+
+ vxxlor $xv6 ,$xb6,$xb6 # save vr23, so we get 8 regs
+ vxxlor $xv7 ,$xb7,$xb7 # save vr23, so we get 8 regs
+ be?vxxlorc $beperm,$xv26,$xv26 # copy back the the beperm.
+
+ vxxlorc @K[0],$xv0,$xv0 #27
+ vxxlorc @K[1],$xv1,$xv1 #24
+ vxxlorc @K[2],$xv2,$xv2 #25
+ vxxlorc @K[3],$xv3,$xv3 #26
+ vxxlorc $CTR0,$xv4,$xv4
+###changing to vertical
+
+ vmrgew $xt0,$xa0,$xa1 # transpose data
+ vmrgew $xt1,$xa2,$xa3
+ vmrgow $xa0,$xa0,$xa1
+ vmrgow $xa2,$xa2,$xa3
+
+ vmrgew $xt2,$xb0,$xb1
+ vmrgew $xt3,$xb2,$xb3
+ vmrgow $xb0,$xb0,$xb1
+ vmrgow $xb2,$xb2,$xb3
+
+ vadduwm $xd0,$xd0,$CTR0
+
+ vpermdi $xa1,$xa0,$xa2,0b00
+ vpermdi $xa3,$xa0,$xa2,0b11
+ vpermdi $xa0,$xt0,$xt1,0b00
+ vpermdi $xa2,$xt0,$xt1,0b11
+ vpermdi $xb1,$xb0,$xb2,0b00
+ vpermdi $xb3,$xb0,$xb2,0b11
+ vpermdi $xb0,$xt2,$xt3,0b00
+ vpermdi $xb2,$xt2,$xt3,0b11
+
+ vmrgew $xt0,$xc0,$xc1
+ vmrgew $xt1,$xc2,$xc3
+ vmrgow $xc0,$xc0,$xc1
+ vmrgow $xc2,$xc2,$xc3
+ vmrgew $xt2,$xd0,$xd1
+ vmrgew $xt3,$xd2,$xd3
+ vmrgow $xd0,$xd0,$xd1
+ vmrgow $xd2,$xd2,$xd3
+
+ vpermdi $xc1,$xc0,$xc2,0b00
+ vpermdi $xc3,$xc0,$xc2,0b11
+ vpermdi $xc0,$xt0,$xt1,0b00
+ vpermdi $xc2,$xt0,$xt1,0b11
+ vpermdi $xd1,$xd0,$xd2,0b00
+ vpermdi $xd3,$xd0,$xd2,0b11
+ vpermdi $xd0,$xt2,$xt3,0b00
+ vpermdi $xd2,$xt2,$xt3,0b11
+
+ vspltisw $xt0,8
+ vadduwm $CTR0,$CTR0,$xt0 # next counter value
+ vxxlor $xv4 ,$CTR0,$CTR0 #CTR+4-> 5
+
+ vadduwm $xa0,$xa0,@K[0]
+ vadduwm $xb0,$xb0,@K[1]
+ vadduwm $xc0,$xc0,@K[2]
+ vadduwm $xd0,$xd0,@K[3]
+
+ be?vperm $xa0,$xa0,$xa0,$beperm
+ be?vperm $xb0,$xb0,$xb0,$beperm
+ be?vperm $xc0,$xc0,$xc0,$beperm
+ be?vperm $xd0,$xd0,$xd0,$beperm
+
+ ${UCMP}i $len,0x40
+ blt Ltail_vsx_8x
+
+ lvx_4w $xt0,$x00,$inp
+ lvx_4w $xt1,$x10,$inp
+ lvx_4w $xt2,$x20,$inp
+ lvx_4w $xt3,$x30,$inp
+
+ vxor $xt0,$xt0,$xa0
+ vxor $xt1,$xt1,$xb0
+ vxor $xt2,$xt2,$xc0
+ vxor $xt3,$xt3,$xd0
+
+ stvx_4w $xt0,$x00,$out
+ stvx_4w $xt1,$x10,$out
+ addi $inp,$inp,0x40
+ stvx_4w $xt2,$x20,$out
+ subi $len,$len,0x40
+ stvx_4w $xt3,$x30,$out
+ addi $out,$out,0x40
+ beq Ldone_vsx_8x
+
+ vadduwm $xa0,$xa1,@K[0]
+ vadduwm $xb0,$xb1,@K[1]
+ vadduwm $xc0,$xc1,@K[2]
+ vadduwm $xd0,$xd1,@K[3]
+
+ be?vperm $xa0,$xa0,$xa0,$beperm
+ be?vperm $xb0,$xb0,$xb0,$beperm
+ be?vperm $xc0,$xc0,$xc0,$beperm
+ be?vperm $xd0,$xd0,$xd0,$beperm
+
+ ${UCMP}i $len,0x40
+ blt Ltail_vsx_8x
+
+ lvx_4w $xt0,$x00,$inp
+ lvx_4w $xt1,$x10,$inp
+ lvx_4w $xt2,$x20,$inp
+ lvx_4w $xt3,$x30,$inp
+
+ vxor $xt0,$xt0,$xa0
+ vxor $xt1,$xt1,$xb0
+ vxor $xt2,$xt2,$xc0
+ vxor $xt3,$xt3,$xd0
+
+ stvx_4w $xt0,$x00,$out
+ stvx_4w $xt1,$x10,$out
+ addi $inp,$inp,0x40
+ stvx_4w $xt2,$x20,$out
+ subi $len,$len,0x40
+ stvx_4w $xt3,$x30,$out
+ addi $out,$out,0x40
+ beq Ldone_vsx_8x
+
+ vadduwm $xa0,$xa2,@K[0]
+ vadduwm $xb0,$xb2,@K[1]
+ vadduwm $xc0,$xc2,@K[2]
+ vadduwm $xd0,$xd2,@K[3]
+
+ be?vperm $xa0,$xa0,$xa0,$beperm
+ be?vperm $xb0,$xb0,$xb0,$beperm
+ be?vperm $xc0,$xc0,$xc0,$beperm
+ be?vperm $xd0,$xd0,$xd0,$beperm
+
+ ${UCMP}i $len,0x40
+ blt Ltail_vsx_8x
+
+ lvx_4w $xt0,$x00,$inp
+ lvx_4w $xt1,$x10,$inp
+ lvx_4w $xt2,$x20,$inp
+ lvx_4w $xt3,$x30,$inp
+
+ vxor $xt0,$xt0,$xa0
+ vxor $xt1,$xt1,$xb0
+ vxor $xt2,$xt2,$xc0
+ vxor $xt3,$xt3,$xd0
+
+ stvx_4w $xt0,$x00,$out
+ stvx_4w $xt1,$x10,$out
+ addi $inp,$inp,0x40
+ stvx_4w $xt2,$x20,$out
+ subi $len,$len,0x40
+ stvx_4w $xt3,$x30,$out
+ addi $out,$out,0x40
+ beq Ldone_vsx_8x
+
+ vadduwm $xa0,$xa3,@K[0]
+ vadduwm $xb0,$xb3,@K[1]
+ vadduwm $xc0,$xc3,@K[2]
+ vadduwm $xd0,$xd3,@K[3]
+
+ be?vperm $xa0,$xa0,$xa0,$beperm
+ be?vperm $xb0,$xb0,$xb0,$beperm
+ be?vperm $xc0,$xc0,$xc0,$beperm
+ be?vperm $xd0,$xd0,$xd0,$beperm
+
+ ${UCMP}i $len,0x40
+ blt Ltail_vsx_8x
+
+ lvx_4w $xt0,$x00,$inp
+ lvx_4w $xt1,$x10,$inp
+ lvx_4w $xt2,$x20,$inp
+ lvx_4w $xt3,$x30,$inp
+
+ vxor $xt0,$xt0,$xa0
+ vxor $xt1,$xt1,$xb0
+ vxor $xt2,$xt2,$xc0
+ vxor $xt3,$xt3,$xd0
+
+ stvx_4w $xt0,$x00,$out
+ stvx_4w $xt1,$x10,$out
+ addi $inp,$inp,0x40
+ stvx_4w $xt2,$x20,$out
+ subi $len,$len,0x40
+ stvx_4w $xt3,$x30,$out
+ addi $out,$out,0x40
+ beq Ldone_vsx_8x
+
+#blk4-7: 24:31 remain the same as we can use the same logic above . Reg a4-b7 remain same.Load c4,d7--> position 8-15.we can reuse vr24-31.
+#VR0-3 : are used to load temp value, vr4 --> as xr0 instead of xt0.
+
+ vxxlorc $CTR1 ,$xv5,$xv5
+
+ vxxlorc $xcn4 ,$xv18,$xv18
+ vxxlorc $xcn5 ,$xv19,$xv19
+ vxxlorc $xcn6 ,$xv20,$xv20
+ vxxlorc $xcn7 ,$xv21,$xv21
+
+ vxxlorc $xdn4 ,$xv13,$xv13
+ vxxlorc $xdn5 ,$xv14,$xv14
+ vxxlorc $xdn6 ,$xv15,$xv15
+ vxxlorc $xdn7 ,$xv16,$xv16
+ vadduwm $xdn4,$xdn4,$CTR1
+
+ vxxlorc $xb6 ,$xv6,$xv6
+ vxxlorc $xb7 ,$xv7,$xv7
+#use xa1->xr0, as xt0...in the block 4-7
+
+ vmrgew $xr0,$xa4,$xa5 # transpose data
+ vmrgew $xt1,$xa6,$xa7