Add new code

Signed-off-by: Carlos Maiolino <[email protected]>

4 files changed, 67 insertions, 0 deletions

diff --git a/CSAPP/chap3/main.c b/CSAPP/chap3/main.c
new file mode 100644
index 0000000..b4f7152
--- /dev/null
+++ b/CSAPP/chap3/main.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+void multstore(long, long, long*);
+
+int main(void)
+{
+	long d;
+	multstore(2, 3, &d);
+	printf("2 * 3 --> %ld\n", d);
+	return 0;
+}
+
+long mult2(long a, long b)
+{
+	long s = a * b;
+	return s;
+}
diff --git a/CSAPP/chap3/mstore.c b/CSAPP/chap3/mstore.c
new file mode 100644
index 0000000..8db0d29
--- /dev/null
+++ b/CSAPP/chap3/mstore.c
@@ -0,0 +1,7 @@
+long mult2(long, long);
+
+void multstore(long x, long y, long *dest)
+{
+	long t = mult2(x, y);
+	*dest = t;
+}
diff --git a/CSAPP/chap3/mstore.s b/CSAPP/chap3/mstore.s
new file mode 100644
index 0000000..78a6c6f
--- /dev/null
+++ b/CSAPP/chap3/mstore.s
@@ -0,0 +1,21 @@
+	.file	"mstore.c"
+	.text
+	.globl	multstore
+	.type	multstore, @function
+multstore:
+.LFB0:
+	.cfi_startproc
+	pushq	%rbx
+	.cfi_def_cfa_offset 16
+	.cfi_offset 3, -16
+	movq	%rdx, %rbx
+	call	mult2
+	movq	%rax, (%rbx)
+	popq	%rbx
+	.cfi_def_cfa_offset 8
+	ret
+	.cfi_endproc
+.LFE0:
+	.size	multstore, .-multstore
+	.ident	"GCC: (GNU) 10.1.1 20200507 (Red Hat 10.1.1-1)"
+	.section	.note.GNU-stack,"",@progbits
diff --git a/CSAPP/chap3/mstore_intel.S b/CSAPP/chap3/mstore_intel.S
new file mode 100644
index 0000000..ca4fa2a
--- /dev/null
+++ b/CSAPP/chap3/mstore_intel.S
@@ -0,0 +1,22 @@
+	.file	"mstore.c"
+	.intel_syntax noprefix
+	.text
+	.globl	multstore
+	.type	multstore, @function
+multstore:
+.LFB0:
+	.cfi_startproc
+	push	rbx
+	.cfi_def_cfa_offset 16
+	.cfi_offset 3, -16
+	mov	rbx, rdx
+	call	mult2
+	mov	QWORD PTR [rbx], rax
+	pop	rbx
+	.cfi_def_cfa_offset 8
+	ret
+	.cfi_endproc
+.LFE0:
+	.size	multstore, .-multstore
+	.ident	"GCC: (GNU) 10.1.1 20200507 (Red Hat 10.1.1-1)"
+	.section	.note.GNU-stack,"",@progbits