From: Ulrich Drepper <drepper@redhat.com>
Date: Tue, 21 Jul 2009 04:18:28 +0000 (-0700)
Subject: Better check for optimization in new x86-64 strstr/strcasestr.
X-Git-Tag: upstream/2.30~13436
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a8f895ebe15c8988618ab1948d3f7035341a2eb7;p=external%2Fglibc.git

Better check for optimization in new x86-64 strstr/strcasestr.
---

diff --git a/ChangeLog b/ChangeLog
index abbbedb..b107428 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-07-20  Ulrich Drepper  <drepper@redhat.com>
+
+	* sysdeps/x86_64/multiarch/strstr.c [USE_AS_STRCASESTR] (STRSTR_SSE42):
+	Use NONASCII_CASE information provided by the locale to determine
+	whether optimized string load function can be used.  Minor cleanups.
+
 2009-07-20  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* string/strcasestr.c (STRCASESTR): New macro.
diff --git a/sysdeps/x86_64/multiarch/strstr.c b/sysdeps/x86_64/multiarch/strstr.c
index bb42753..f1455a1 100644
--- a/sysdeps/x86_64/multiarch/strstr.c
+++ b/sysdeps/x86_64/multiarch/strstr.c
@@ -26,8 +26,7 @@
 
 #ifdef USE_AS_STRCASESTR
 # include <ctype.h>
-# include <locale.h>
-# include <string.h>
+# include <locale/localeinfo.h>
 
 # define LOADBYTE(C)		tolower (C)
 # define CMPBYTE(C1, C2) \
@@ -257,12 +256,20 @@ char *
 __attribute__ ((section (".text.sse4.2")))
 STRSTR_SSE42 (const unsigned char *s1, const unsigned char *s2)
 {
-  int len, len1;
+  int len;
+  int len1;
   const unsigned char *p1 = s1;
   const unsigned char *p2 = s2;
-  __m128i frag1, frag2, zero;
-  int cmp, cmp_c, cmp_z, cmp_s;
-  int kmp_fwd, bmsk, bmsk1;
+  __m128i frag1;
+  __m128i frag2;
+  __m128i zero;
+  int cmp;
+  int cmp_c;
+  int cmp_z;
+  int cmp_s;
+  int kmp_fwd;
+  int bmsk;
+  int bmsk1;
   const unsigned char *pt;
 
   if (!p2[0])
@@ -277,11 +284,8 @@ STRSTR_SSE42 (const unsigned char *s1, const unsigned char *s2)
 
 #ifdef USE_AS_STRCASESTR
   __m128i (*strloadu) (const unsigned char *);
-  const char *used_locale = setlocale (LC_CTYPE, NULL);
 
-  if (!used_locale
-      || (used_locale[0] == 'C' && used_locale[1] == '\0')
-      || strcmp (used_locale, "POSIX") == 0)
+  if (_NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_NONASCII_CASE) == 0)
     strloadu = __m128i_strloadu_tolower_posix;
   else
     strloadu = __m128i_strloadu_tolower;
@@ -430,7 +434,7 @@ re_trace:
      action   done   done   continue    continue if s2 < s1
 	      false  match  retrace s1     else false
    */
- 
+
   if(cmp_s & !cmp)
     return (char *) pt;
   else if (cmp_z)