#include <string.h>

int strcmp(const char* s1, const char* s2)
{
    int d0, d1;
    register int __res;
    __asm__ __volatile__(
        "1:\tlodsb\n\t"
        "scasb\n\t"
        "jne 2f\n\t"
        "testb %%al,%%al\n\t"
        "jne 1b\n\t"
        "xorl %%eax,%%eax\n\t"
        "jmp 3f\n"
        "2:\tsbbl %%eax,%%eax\n\t"
        "orb $1,%%al\n"
        "3:"
        : "=a"(__res), "=&S"(d0), "=&D"(d1)
        : "1"(s1), "2"(s2));
    return __res;
}