.text
        .global mystrcmp
mystrcmp:
        pushl   %ebp
        movl    %esp, %ebp

        pushl   %ebx
        pushl   %esi
        pushl   %edi

        movl    8(%ebp), %ecx
        movl    12(%ebp), %edx
        movl    $0, %esi
for:
        movl    (%edx,%esi,1), %eax //str1[i]
        movl    (%ecx,%esi,1), %ebx //str2[i]
        cmpl    %ebx, %eax
        jne     compare // compare
        incl    %esi
        cmpl    $0, %eax
        jg      for
compare:
        cmpl    %ebx, %eax
        jl      less
        je      equal
        jg      greater
less:
        movl    $-1, %eax
        jmp     end
equal:
        movl    $0, %eax
        jmp     end
greater:
        movl    $1, %eax
        jmp     end
end:
        popl    %edi
        popl    %esi
        popl    %ebx

        popl    %ebp
        ret