1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/*
* arch/i386/libgcc/__muldi3.S
*
* 64*64 = 64 bit unsigned multiplication
*/
.text
.align 4
.globl __muldi3
.type __muldi3,@function
__muldi3:
#if __SIZEOF_POINTER__ == 4
/* i386 */
push %esi
#ifndef REGPARM
movl 8(%esp),%eax
movl %eax,%esi
movl 16(%esp),%ecx
mull %ecx
imull 12(%esp),%ecx
imull 20(%esp),%esi
addl %ecx,%edx
addl %esi,%edx
#else
movl %eax,%esi
push %edx
mull %ecx
imull 8(%esp),%esi
addl %esi,%edx
pop %esi
imull %esi,%ecx
addl %ecx,%edx
#endif
pop %esi
ret
#elif __SIZEOF_POINTER__ == 8
/* x86_64 */
push %rsi
#ifndef REGPARM
/*
movl 8(%esp),%eax
movl %eax,%esi
movl 16(%esp),%ecx
mull %ecx
imull 12(%esp),%ecx
imull 20(%esp),%esi
addl %ecx,%edx
addl %esi,%edx
*/
movq 8(%rsp),%rax
movq %rax,%rsi
movq 16(%rsp),%rcx
mulq %rcx
imulq 12(%rsp),%rcx
imulq 20(%rsp),%rsi
addq %rcx,%rdx
addq %rsi,%rdx
#else
/*
movl %eax,%esi
push %edx
mull %ecx
imull 8(%esp),%esi
addl %esi,%edx
pop %rsi
imull %esi,%ecx
addl %ecx,%edx
*/
movq %rax,%rsi
pushq %rdx
mulq %rcx
imulq 8(%rsp),%rsi
addq %rsi,%rdx
popq %rsi
imulq %rsi,%rcx
addq %rcx,%rdx
#endif
pop %rsi
ret
#else
#error "Unsupported architecture for __muldi3.S"
#endif
.size __muldi3,.-__muldi3
|
