1 files changed, 31 insertions, 0 deletions

diff --git a/arch/x86/lib/strstr_32.c b/arch/x86/lib/strstr_32.c
new file mode 100644
index 000000000000..a3dafbf59dae
--- /dev/null
+++ b/arch/x86/lib/strstr_32.c
@@ -0,0 +1,31 @@
+#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;
+}
+