Add x86-32 optimized wcscmp

ChangeLog

@@ -1,3 +1,12 @@
+2011-08-29  Liubov Dmitrieva  <liubov.dmitrieva@gmail.com>
+
+	* sysdeps/i386/i686/multiarch/Makefile: (sysdep_routines): Add
+	wcscmp-c wcscmp-sse2
+	* sysdeps/i386/i686/multiarch/wcscmp-c.c: New file.
+	* sysdeps/i386/i686/multiarch/wcscmp.S: New file.
+	* sysdeps/i386/i686/multiarch/wcscmp-sse2.S: New file.
+	* wcsmbs/wcscmp.c: Allow renaming.
+
 2011-09-05  David S. Miller  <davem@davemloft.net>
 
 	* sysdeps/sparc/sparc32/fpu/s_fabsf.S: Use first argument

NEWS

@@ -25,7 +25,7 @@ Version 2.15
 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
   Contributed by HJ Lu.
 
-* Optimized strcat and strncat on x86-64.
+* Optimized strcat and strncat on x86-64 and optimized wcscmp on x86-32.
   Contributed by Liubov Dmitrieva.
 
 * New interfaces: scandirat, scandirat64

sysdeps/i386/i686/multiarch/Makefile

@@ -13,7 +13,8 @@ sysdep_routines += bzero-sse2 memset-sse2 memcpy-ssse3 mempcpy-ssse3 \
 		   strlen-sse2 strlen-sse2-bsf strncpy-c strcpy-ssse3 \
 		   strncpy-ssse3 stpcpy-ssse3 stpncpy-ssse3 strcpy-sse2 \
 		   strncpy-sse2 stpcpy-sse2 stpncpy-sse2 strcat-ssse3 \
-		   strcat-sse2 strncat-ssse3 strncat-sse2 strncat-c
+		   strcat-sse2 strncat-ssse3 strncat-sse2 strncat-c \
+			wcscmp-sse2 wcscmp-c
 ifeq (yes,$(config-cflags-sse4))
 sysdep_routines += strcspn-c strpbrk-c strspn-c strstr-c strcasestr-c
 CFLAGS-varshift.c += -msse4

sysdeps/i386/i686/multiarch/wcscmp-c.c

@@ -0,0 +1,11 @@
+#ifndef  NOT_IN_libc
+
+# define WCSCMP __wcscmp_ia32
+
+# undef libc_hidden_def
+# define libc_hidden_def(name) \
+  __hidden_ver1 (__wcscmp_ia32, __GI_wcscmp, __wcscmp_ia32);
+#endif
+
+#include "wcsmbs/wcscmp.c"
+

sysdeps/i386/i686/multiarch/wcscmp.S

@@ -0,0 +1,58 @@
+/* Multiple versions of wcscmp 
+   Copyright (C) 2011 Free Software Foundation, Inc.
+   Contributed by Intel Corporation.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <sysdep.h>
+#include <init-arch.h>
+
+/* Define multiple versions only for the definition in libc and for the
+   DSO.  In static binaries, we need wcscmp before the initialization
+   happened.  */
+#ifndef  NOT_IN_libc
+	.section	.gnu.linkonce.t.__i686.get_pc_thunk.bx,"ax",@progbits
+	.globl	__i686.get_pc_thunk.bx
+	.hidden	__i686.get_pc_thunk.bx
+	.p2align 4
+	.type	__i686.get_pc_thunk.bx,@function
+__i686.get_pc_thunk.bx:
+	movl	(%esp), %ebx
+	ret
+
+	.text
+ENTRY(wcscmp)
+	.type	wcscmp, @gnu_indirect_function
+	pushl	%ebx
+	cfi_adjust_cfa_offset (4)
+	cfi_rel_offset (ebx, 0)
+	call	__i686.get_pc_thunk.bx
+	addl	$_GLOBAL_OFFSET_TABLE_, %ebx
+	cmpl	$0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx)
+	jne	1f
+	call	__init_cpu_features
+1:	leal	__wcscmp_ia32@GOTOFF(%ebx), %eax
+	testl	$bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features@GOTOFF(%ebx)
+	jz	2f
+	leal	__wcscmp_sse2@GOTOFF(%ebx), %eax
+2:	popl	%ebx
+	cfi_adjust_cfa_offset (-4);
+	cfi_restore (ebx)
+	ret
+END(wcscmp)
+#endif
+

wcsmbs/wcscmp.c

@@ -19,12 +19,15 @@
 
 #include <wchar.h>
 
+#ifndef WCSCMP
+# define WCSCMP wcscmp
+#endif
 
 /* Compare S1 and S2, returning less than, equal to or
    greater than zero if S1 is lexicographically less than,
    equal to or greater than S2.	 */
 int
-wcscmp (s1, s2)
+WCSCMP (s1, s2)
      const wchar_t *s1;
      const wchar_t *s2;
 {
@@ -41,4 +44,4 @@ wcscmp (s1, s2)
 
   return c1 - c2;
 }
-libc_hidden_def (wcscmp)
+libc_hidden_def (WCSCMP)