0,0 → 1,30 |
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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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