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{

    int d0, d1;

    register char *__res;

    __asm__ __volatile__(

    "movl %6,%%edi\n\t"

    "repne\n\t"

    "scasb\n\t"

    "notl %%ecx\n\t"

    "decl %%ecx\n\t"        /* NOTE! This also sets Z if searchstring='' */

    "movl %%ecx,%%edx\n"

    "1:\tmovl %6,%%edi\n\t"

    "movl %%esi,%%eax\n\t"

    "movl %%edx,%%ecx\n\t"

    "repe\n\t"

    "cmpsb\n\t"

    "je 2f\n\t"             /* also works for empty string, see above */

    "xchgl %%eax,%%esi\n\t"

    "incl %%esi\n\t"

    "cmpb $0,-1(%%eax)\n\t"

    "jne 1b\n\t"

    "xorl %%eax,%%eax\n\t"

    "2:"

    : "=a" (__res), "=&c" (d0), "=&S" (d1)

    : "0" (0), "1" (0xffffffff), "2" (cs), "g" (ct)

    : "dx", "di");

    return __res;

}