字符串比较--汇编

  32位平台的汇编 AT&T
# strcmp.s -Am example of comparing strings
.section .data
string1:
    .ascii "test"
length1:
    .int 4
string2:
    .ascii "test1"
length2:
    .int 5
.section .text
.global main
main:
    lea string1, %esi
    lea string2, %edi
    movl length1, %ecx
    movl length2, %eax
    cmpl %eax, %ecx
    jb longer
    xchg %ecx, %eax
longer:
    cld
    repe cmpsb
    je equal
    jg greater
less:
    movl $1, %eax
    movl $255, %ebx
    int $0x80
greater:
    movl $1, %eax
    movl $1, %ebx
    int $0x80
equal:
    movl length1, %ecx
    movl length2, %eax
    cmpl %eax, %ecx 
    jg greater
    jl less
    movl $1, %eax
    movl $0, %ebx
    int $0x80