sgrep.asm

来自「unix环境下实现的cmm语言编译器」· 汇编 代码 · 共 148 行

section .data
global pattern
align 1
pattern:
db 111
db 117
db 108
db 100
db 0
section .text
global main
main:
push ebx
push edx
push ecx
push esi
push edi
push ebp
mov ebp,esp
sub esp, 512
mov edi, 0
jmp L3
L2:
push pattern
mov esi, ebp
add esi, -512
push esi
call strindex
add esp, 8
cmp eax,0
jl near L3
mov esi, ebp
add esi, -512
push esi
push L7
call printf
add esp, 8
mov esi, edi
add esi, 1
mov edi, esi
L3:
push 512
mov esi, ebp
add esi, -512
push esi
call getline
add esp, 8
cmp eax,0
jg near L2
mov eax,edi
jmp L1
L1:
mov esp,ebp
pop ebp
pop edi
pop esi
pop ecx
pop edx
pop ebx
ret
global strindex
strindex:
push ebx
push edx
push ecx
push esi
push edi
push ebp
mov ebp,esp
mov ebx, 0
jmp L10
L9:
mov esi, ebx
mov edi, 0
jmp L13
L12:
mov edx, dword [ebp+28]
mov ecx, esi
add ecx, edx
mov dl,byte  [ecx]
movsx edx,dl
mov ecx, dword [ebp+32]
mov eax, edi
add eax, ecx
mov cl,byte  [eax]
movsx ecx,cl
cmp edx, ecx
je near L15
jmp L14
L15:
mov edx, esi
add edx, 1
mov esi, edx
mov edx, edi
add edx, 1
mov edi, edx
L13:
mov edx, dword [ebp+32]
mov ecx, edi
add ecx, edx
mov dl,byte  [ecx]
movsx edx,dl
cmp edx,0
jne near L12
L14:
cmp edi,0
jle near L17
mov edx, dword [ebp+32]
mov ecx, edi
add ecx, edx
mov dl,byte  [ecx]
movsx edx,dl
cmp edx,0
jne near L17
mov eax,ebx
jmp L8
L17:
mov edx, ebx
add edx, 1
mov ebx, edx
L10:
mov edx, dword [ebp+28]
mov ecx, ebx
add ecx, edx
mov dl,byte  [ecx]
movsx edx,dl
cmp edx,0
jne near L9
mov eax,-1
jmp L8
L8:
mov esp,ebp
pop ebp
pop edi
pop esi
pop ecx
pop edx
pop ebx
ret
extern printf
extern getline
section .data
align 1
L7:
db 37
db 115
db 0