mem.s2.asm_ia32 1.1 KB raw

section .text
​
global memcpy
memcpy:
    push esi
    push edi
    mov eax, dword [esp+12]
    mov edi, eax
    mov esi, dword [esp+16]
    mov ecx, dword [esp+20]
    rep movsb
    pop edi
    pop esi
    ret
​
global memset
memset:
    push edi
    mov edx, dword [esp+8]
    mov edi, edx
    mov eax, dword [esp+12]
    mov ecx, dword [esp+16]
    rep stosb
    mov eax, edx
    pop edi
    ret
​
global memmove
memmove:
    push esi
    push edi
    mov eax, dword [esp+12]
    mov edi, eax
    mov esi, dword [esp+16]
    mov ecx, dword [esp+20]
​
    cmp edi, esi
    ja .copy_backwards
​
    rep movsb
    jmp .done
​
  .copy_backwards:
    lea edi, [edi+ecx-1]
    lea esi, [esi+ecx-1]
    std
    rep movsb
    cld
​
  .done:
    pop edi
    pop esi
    ret
​
global memcmp
memcmp:
    push esi
    push edi
    mov edi, dword [esp+12]
    mov esi, dword [esp+16]
    mov ecx, dword [esp+20]
    repe cmpsb
    je .equal
    mov al, byte [edi-1]
    sub al, byte [esi-1]
    movsx eax, al
    jmp .done
​
  .equal:
    xor eax, eax
​
  .done:
    pop edi
    pop esi
    ret
​
section .note.GNU-stack noalloc noexec nowrite progbits

tab: 2 4 8 wrap: off on

1	section .text
2
3	global memcpy
4	memcpy:
5	push esi
6	push edi
7	mov eax, dword [esp+12]
8	mov edi, eax
9	mov esi, dword [esp+16]
10	mov ecx, dword [esp+20]
11	rep movsb
12	pop edi
13	pop esi
14	ret
15
16	global memset
17	memset:
18	push edi
19	mov edx, dword [esp+8]
20	mov edi, edx
21	mov eax, dword [esp+12]
22	mov ecx, dword [esp+16]
23	rep stosb
24	mov eax, edx
25	pop edi
26	ret
27
28	global memmove
29	memmove:
30	push esi
31	push edi
32	mov eax, dword [esp+12]
33	mov edi, eax
34	mov esi, dword [esp+16]
35	mov ecx, dword [esp+20]
36
37	cmp edi, esi
38	ja .copy_backwards
39
40	rep movsb
41	jmp .done
42
43	.copy_backwards:
44	lea edi, [edi+ecx-1]
45	lea esi, [esi+ecx-1]
46	std
47	rep movsb
48	cld
49
50	.done:
51	pop edi
52	pop esi
53	ret
54
55	global memcmp
56	memcmp:
57	push esi
58	push edi
59	mov edi, dword [esp+12]
60	mov esi, dword [esp+16]
61	mov ecx, dword [esp+20]
62	repe cmpsb
63	je .equal
64	mov al, byte [edi-1]
65	sub al, byte [esi-1]
66	movsx eax, al
67	jmp .done
68
69	.equal:
70	xor eax, eax
71
72	.done:
73	pop edi
74	pop esi
75	ret
76
77	section .note.GNU-stack noalloc noexec nowrite progbits