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

        pushl   %esi

        movl    8(%ebp), %eax
        movl    12(%ebp), %edx
loop:
        movzbl  (%edx), %ecx
        movzbl  (%eax), %esi
        cmpl    %ecx, %esi
        jnz     not_eq
        cmpl    $0, %esi
        jnz     change_id
        cmpl    $0, %ecx
        jz      eq

change_id:
        incl    %eax
        incl    %edx
        jmp     loop

not_eq:
        subl    %ecx, %esi
        movl    %esi, %eax

        popl    %esi
        movl    %ebp, %esp
        popl    %ebp
        ret

eq:
        popl    %esi
        movl    %ebp, %esp
        popl    %ebp
        xorl    %eax, %eax
        ret