Adding inline exercises to lab/interactiune-c-assembly

Adding 1-inline-for, 2-inline-rotate and 3-inline-rtdscp
and reordering the exercises accordingly.

Signed-off-by: Andreia Ocanoaia <[email protected]>

laborator/content/interactiune-c-assembly/01-inline-for/.gitignore

@@ -0,0 +1 @@
+/inline_for.asm

laborator/content/interactiune-c-assembly/01-inline-for/Makefile

@@ -0,0 +1,3 @@
+PROGNAME := inline_for
+include ../../utils/Makefile.generic
+

laborator/content/interactiune-c-assembly/01-inline-for/inline_for.c

@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: BSD-3-Clause
+
+#include <stdio.h>
+
+#define NUM	100
+
+int main(void)
+{
+	size_t n = NUM;
+	size_t sum = 0;
+
+	__asm__ (
+	"xor eax, eax\n\t" /* collect the sum in eax */
+	/* use ecx to go through items, start from n */
+	"mov ecx, %1\n"
+	"add_to_sum:\n\t"
+	"add eax, ecx\n\t"
+	"loopnz add_to_sum\n\t"
+	/* place sum in output register */
+	"mov %0, eax\n\t"
+	: "=r" (sum) /* output variable */
+	: "r" (n) /* input variable */
+	: "eax", "ecx"
+	); /* registers used in the assembly code */
+
+	printf("sum(%u): %u\n", n, sum);
+
+	return 0;
+}

laborator/content/interactiune-c-assembly/02-inline-rotate/.gitignore

@@ -0,0 +1 @@
+/inline_rotate.asm

laborator/content/interactiune-c-assembly/02-inline-rotate/Makefile

@@ -0,0 +1,3 @@
+PROGNAME := inline_rotate
+include ../../utils/Makefile.generic
+

laborator/content/interactiune-c-assembly/02-inline-rotate/inline_rotate.c

@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: BSD-3-Clause
+
+#include <stdio.h>
+
+#define NUM	0x12345678
+
+int main(void)
+{
+	size_t n = NUM;
+	size_t rot_left = 0;
+	size_t rot_right = 0;
+
+	__asm__ (""
+	/* TODO: Use rol instruction to shift n by 8 bits left.
+	 * Place result in rot_left variable.
+	 */
+
+	/* TODO: Use ror instruction to shift n by 8 bits right.
+	 * Place result in rot_right variable.
+	 */
+	/* TODO: Declare output variables - preceded by ':'. */
+	/* TODO: Declare input variables - preceded by ':'. */
+	/* TODO: Declared used registers - preceded by ':'. */
+	);
+
+	/* NOTE: Output variables are passed by address, input variables
+	 * are passed by value.
+	 */
+
+	printf("init: 0x%08x, rot_left: 0x%08x, rot_right: 0x%08x\n",
+			n, rot_left, rot_right);
+
+	return 0;
+}

laborator/content/interactiune-c-assembly/03-inline-rdtscp/.gitignore

@@ -0,0 +1 @@
+/inline_cpuid.asm

laborator/content/interactiune-c-assembly/03-inline-rdtscp/Makefile

@@ -0,0 +1,3 @@
+PROGNAME := inline_rtdscp
+include ../../utils/Makefile.generic
+

laborator/content/interactiune-c-assembly/03-inline-rdtscp/inline_rdtscp.c

@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: BSD-3-Clause
+
+#include <stdio.h>
+
+int main(void)
+{
+	char rdtscp_str[13];
+
+	__asm__ (""
+	/* TODO: Make rdtscp call and copy string in rdtscp_str.
+	 * After rdtscp call result is placed in (EDX:EAX registers).
+	 */
+	);
+
+	rdtscp_str[12] = '\0';
+
+	printf("rdtscp string: %s\n", rdtscp_str);
+
+	return 0;
+}

laborator/content/interactiune-c-assembly/solution/02-inline-rotate/.gitignore

@@ -0,0 +1 @@
+/inline_rotate.asm

laborator/content/interactiune-c-assembly/solution/02-inline-rotate/Makefile

@@ -0,0 +1,3 @@
+PROGNAME := inline_rotate
+include ../../../utils/Makefile.generic
+

laborator/content/interactiune-c-assembly/solution/02-inline-rotate/inline_rotate.c

@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: BSD-3-Clause
+
+#include <stdio.h>
+
+#define NUM	0x12345678
+
+int main(void)
+{
+	size_t n = NUM;
+	size_t rot_left = 0;
+	size_t rot_right = 0;
+
+	__asm__ (
+	/* Use rol instruction to shift n by 8 bits left.
+	 * Place result in rot_left variable.
+	 */
+	"mov eax, %1\n\t"
+	"rol %1, 8\n\t"
+	"mov %0, eax\n\t"
+	: "=r" (rot_left)
+	: "r" (n)
+	: "eax"
+	);
+
+	__asm__ (
+	/* Use ror instruction to shift n by 8 bits right.
+	 * Place result in rot_right variable.
+	 */
+	"mov eax, %1\n\t"
+	"ror eax, 8\n\t"
+	"mov %0, eax\n\t"
+	: "=r" (rot_right)
+	: "r" (n)
+	: "eax", "ecx"
+	);
+
+
+	/* NOTE: Output variables are passed by address, input variables
+	 * are passed by value.
+	 */
+	printf("init: 0x%08x, rot_left: 0x%08x, rot_right: 0x%08x\n",
+			n, rot_left, rot_right);
+
+	return 0;
+}