x86, 64-bit: adjust mapping of physical pagetables to work with Xen
[linux-2.6] / arch / x86 / lib / strstr_32.c
1 #include <linux/string.h>
2
3 char *strstr(const char *cs, const char *ct)
4 {
5 int     d0, d1;
6 register char *__res;
7 __asm__ __volatile__(
8         "movl %6,%%edi\n\t"
9         "repne\n\t"
10         "scasb\n\t"
11         "notl %%ecx\n\t"
12         "decl %%ecx\n\t"        /* NOTE! This also sets Z if searchstring='' */
13         "movl %%ecx,%%edx\n"
14         "1:\tmovl %6,%%edi\n\t"
15         "movl %%esi,%%eax\n\t"
16         "movl %%edx,%%ecx\n\t"
17         "repe\n\t"
18         "cmpsb\n\t"
19         "je 2f\n\t"             /* also works for empty string, see above */
20         "xchgl %%eax,%%esi\n\t"
21         "incl %%esi\n\t"
22         "cmpb $0,-1(%%eax)\n\t"
23         "jne 1b\n\t"
24         "xorl %%eax,%%eax\n\t"
25         "2:"
26         :"=a" (__res), "=&c" (d0), "=&S" (d1)
27         :"0" (0), "1" (0xffffffff), "2" (cs), "g" (ct)
28         :"dx", "di");
29 return __res;
30 }
31