Add new code

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

1 files changed, 79 insertions, 0 deletions

diff --git a/CSAPP/tmul_asm.s b/CSAPP/tmul_asm.s
new file mode 100644
index 0000000..288a36a
--- /dev/null
+++ b/CSAPP/tmul_asm.s
@@ -0,0 +1,79 @@
+	.file	"tmul_asm.c"
+	.text
+	.globl	tmul_bug
+	.type	tmul_bug, @function
+tmul_bug:
+.LFB0:
+	.cfi_startproc
+	imulq	%rdi, %rsi
+	movq	%rsi, (%rdx)
+#APP
+# 5 "tmul_asm.c" 1
+	setae %al
+# 0 "" 2
+#NO_APP
+	movl	$0, %eax
+	ret
+	.cfi_endproc
+.LFE0:
+	.size	tmul_bug, .-tmul_bug
+	.globl	tmul_ok
+	.type	tmul_ok, @function
+tmul_ok:
+.LFB1:
+	.cfi_startproc
+	pushq	%rbx
+	.cfi_def_cfa_offset 16
+	.cfi_offset 3, -16
+	imulq	%rdi, %rsi
+	movq	%rsi, (%rdx)
+#APP
+# 13 "tmul_asm.c" 1
+	setae %bl		# Set low-order byte
+	movzbl %bl, %eax	# Zero extend to be res
+# 0 "" 2
+#NO_APP
+	popq	%rbx
+	.cfi_def_cfa_offset 8
+	ret
+	.cfi_endproc
+.LFE1:
+	.size	tmul_ok, .-tmul_ok
+	.globl	tmul_ok2
+	.type	tmul_ok2, @function
+tmul_ok2:
+.LFB2:
+	.cfi_startproc
+	imulq	%rdi, %rsi
+	movq	%rsi, (%rdx)
+#APP
+# 27 "tmul_asm.c" 1
+	setae %al		# Set result
+# 0 "" 2
+#NO_APP
+	movzbl	%al, %eax
+	ret
+	.cfi_endproc
+.LFE2:
+	.size	tmul_ok2, .-tmul_ok2
+	.globl	umult_ok
+	.type	umult_ok, @function
+umult_ok:
+.LFB3:
+	.cfi_startproc
+	movq	%rdx, %rcx
+#APP
+# 41 "tmul_asm.c" 1
+	movq %rdi,%rax	#Get x
+	mulq %rsi	# Unsigned long mult x*y
+	movq %rax,(%rcx)	#Store low-order 8bytes at dest
+	setae %dil	#Set result
+# 0 "" 2
+#NO_APP
+	movzbl	%dil, %eax
+	ret
+	.cfi_endproc
+.LFE3:
+	.size	umult_ok, .-umult_ok
+	.ident	"GCC: (GNU) 5.3.1 20160406 (Red Hat 5.3.1-6)"
+	.section	.note.GNU-stack,"",@progbits