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strstr_32.c

#include <linux/string.h>

char * strstr(const char * cs,const char * ct)
{
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;
}


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