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authorThomas Gleixner <tglx@linutronix.de>2007-10-11 11:16:33 +0200
committerThomas Gleixner <tglx@linutronix.de>2007-10-11 11:16:33 +0200
commit44f0257fc316ff4b33aa3438dd8d891b7d6d72b9 (patch)
treec1a9a571db37d631489f18e1dfe5554874b19027 /arch/x86/lib/strstr_32.c
parentda957e111bb0c189a4a3bf8a00caaecb59ed94ca (diff)
downloadblackbird-op-linux-44f0257fc316ff4b33aa3438dd8d891b7d6d72b9.tar.gz
blackbird-op-linux-44f0257fc316ff4b33aa3438dd8d891b7d6d72b9.zip
i386: move lib
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/lib/strstr_32.c')
-rw-r--r--arch/x86/lib/strstr_32.c31
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;
+}
+
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