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authorUlrich Drepper <drepper@redhat.com>1999-10-04 06:16:19 +0000
committerUlrich Drepper <drepper@redhat.com>1999-10-04 06:16:19 +0000
commit22baad3c3de66e418e402585d6bc6322cba68a87 (patch)
treeb43b599e5935d5c81aa46c772a4e91224f46d487 /sysdeps/i386/i486/bits
parent1d781d86c3c36d1dd363df62009a31ca528270f8 (diff)
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Update.
1999-10-03 Ulrich Drepper <drepper@cygnus.com> * sysdeps/i386/i486/bits/string.h (__memrchr): New function. * sysdeps/i386/bits/string.h (__memrchr): Add cld to comply to conventions. * string/Versions: Export memrchr.
Diffstat (limited to 'sysdeps/i386/i486/bits')
-rw-r--r--sysdeps/i386/i486/bits/string.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/sysdeps/i386/i486/bits/string.h b/sysdeps/i386/i486/bits/string.h
index 644967c895..9b37f5898e 100644
--- a/sysdeps/i386/i486/bits/string.h
+++ b/sysdeps/i386/i486/bits/string.h
@@ -446,6 +446,42 @@ memchr (__const void *__s, int __c, size_t __n)
}
#endif
+#define _HAVE_STRING_ARCH_memrchr 1
+#ifndef _FORCE_INLINES
+__STRING_INLINE void *
+__memrchr (__const void *__s, int __c, size_t __n)
+{
+ register unsigned long int __d0;
+#ifdef __i686__
+ register unsigned long int __d1;
+#endif
+ register void *__res;
+ if (__n == 0)
+ return NULL;
+#ifdef __i686__
+ __asm__ __volatile__
+ ("std\n\t"
+ "repne; scasb\n\t"
+ "cmovne %2,%0\n\t"
+ "cld"
+ : "=D" (__res), "=&c" (__d0), "=&r" (__d1)
+ : "a" (__c), "0" (__s), "1" (__n), "2" (1)
+ : "cc");
+#else
+ __asm__ __volatile__
+ ("std\n\t"
+ "repne; scasb\n\t"
+ "je 1f\n\t"
+ "movl $1,%0\n"
+ "1:\tcld"
+ : "=D" (__res), "=&c" (__d0)
+ : "a" (__c), "0" (__s), "1" (__n)
+ : "cc");
+#endif
+ return __res - 1;
+}
+#endif
+
/* Return pointer to C in S. */
#define _HAVE_STRING_ARCH_rawmemchr 1
__STRING_INLINE void *__rawmemchr (const void *__s, int __c);