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GNU C Library master sources branch master updated. glibc-2.25-215-g249dcdb

From: raji at sourceware dot org
To: glibc-cvs at sourceware dot org
Date: 13 Apr 2017 06:37:04 -0000
Subject: GNU C Library master sources branch master updated. glibc-2.25-215-g249dcdb
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The branch, master has been updated
       via  249dcdb71b79e4c488a46c9027e0014c0bc27044 (commit)
      from  158d5fa0e1906e7810bdc6ecb7bf598dcc3cd17d (commit)

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- Log -----------------------------------------------------------------
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=249dcdb71b79e4c488a46c9027e0014c0bc27044

commit 249dcdb71b79e4c488a46c9027e0014c0bc27044
Author: Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>
Date:   Thu Apr 13 11:29:20 2017 +0530

    powerpc: Optimized strncat for POWER8
    
    With new optimized strnlen for POWER8 [1], this patch adds
    strncat for power8 to make use of optimized strlen and strnlen.
    This is faster than POWER7 current implementation for larger strings.
    
    Tested on powerpc64 and powerpc64le.
    
    [1] https://sourceware.org/ml/libc-alpha/2017-03/msg00491.html
    
    	* sysdeps/powerpc/powerpc64/multiarch/Makefile (sysdep_routines): Add
    	strncat-power8.
    	* sysdeps/powerpc/powerpc64/multiarch/strncat.c (strncat): Add
    	__strncat_power8 to ifunc list.
    	* sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
    	(strncat): Add __strncat_power8 to list of strncat functions.
    	* sysdeps/powerpc/powerpc64/multiarch/strncat-power8.c: New file.

diff --git a/ChangeLog b/ChangeLog
index 52b8d41..b310214 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2017-04-13  Rajalakshmi Srinivasaraghavan  <raji@linux.vnet.ibm.com>
+
+	* sysdeps/powerpc/powerpc64/multiarch/Makefile (sysdep_routines): Add
+	strncat-power8.
+	* sysdeps/powerpc/powerpc64/multiarch/strncat.c (strncat): Add
+	__strncat_power8 to ifunc list.
+	* sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+	(strncat): Add __strncat_power8 to list of strncat functions.
+	* sysdeps/powerpc/powerpc64/multiarch/strncat-power8.c: New file.
+
 2017-04-11  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 
 	[BZ #21270]
diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
index 38233a7..0eb3d07 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile
@@ -15,7 +15,8 @@ sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
 		   strchrnul-power8 strchrnul-power7 strchrnul-ppc64 \
 		   strcpy-power8 strcpy-power7 strcpy-ppc64 stpcpy-power8 \
 		   stpcpy-power7 stpcpy-ppc64 \
-		   strrchr-power7 strrchr-ppc64 strncat-power7 strncat-ppc64 \
+		   strrchr-power7 strrchr-ppc64 \
+		   strncat-power8 strncat-power7 strncat-ppc64 \
 		   strncpy-power7 strncpy-ppc64 \
 		   stpncpy-power8 stpncpy-power7 stpncpy-ppc64 \
 		   strcmp-power9 strcmp-power8 strcmp-power7 strcmp-ppc64 \
diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
index 30a0133..bddec1a 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
@@ -292,6 +292,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
   /* Support sysdeps/powerpc/powerpc64/multiarch/strncat.c.  */
   IFUNC_IMPL (i, name, strncat,
 	      IFUNC_IMPL_ADD (array, i, strncat,
+			      hwcap2 & PPC_FEATURE2_ARCH_2_07,
+			      __strncat_power8)
+	      IFUNC_IMPL_ADD (array, i, strncat,
 			      hwcap & PPC_FEATURE_HAS_VSX,
 			      __strncat_power7)
 	      IFUNC_IMPL_ADD (array, i, strncat, 1,
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncat.c b/sysdeps/powerpc/powerpc64/multiarch/strncat-power8.c
similarity index 57%
copy from sysdeps/powerpc/powerpc64/multiarch/strncat.c
copy to sysdeps/powerpc/powerpc64/multiarch/strncat-power8.c
index 1aa5c11..1ec1259 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strncat.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncat-power8.c
@@ -1,5 +1,4 @@
-/* Multiple versions of strncat. PowerPC64 version.
-   Copyright (C) 2014-2017 Free Software Foundation, Inc.
+/* Copyright (C) 2017 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -14,18 +13,19 @@
 
    You should have received a copy of the GNU Lesser General Public
    License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
+   <http://www.gnu.org/licenses/ >.  */
 
-#if IS_IN (libc)
-# include <string.h>
-# include <shlib-compat.h>
-# include "init-arch.h"
+#include <string.h>
 
-extern __typeof (strncat) __strncat_ppc attribute_hidden;
-extern __typeof (strncat) __strncat_power7 attribute_hidden;
+#define STRNCAT __strncat_power8
 
-libc_ifunc (strncat,
-            (hwcap & PPC_FEATURE_HAS_VSX)
-            ? __strncat_power7
-            : __strncat_ppc);
-#endif
+extern __typeof (strncat) __strncat_power8 attribute_hidden;
+extern __typeof (strlen) __strlen_power8 attribute_hidden;
+extern __typeof (strnlen) __strnlen_power8 attribute_hidden;
+extern __typeof (memcpy) __memcpy_power7 attribute_hidden;
+
+#define strlen    __strlen_power8
+#define __strnlen __strnlen_power8
+#define memcpy    __memcpy_power7
+
+#include <string/strncat.c>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncat.c b/sysdeps/powerpc/powerpc64/multiarch/strncat.c
index 1aa5c11..ba3fe5c 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/strncat.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncat.c
@@ -23,9 +23,12 @@
 
 extern __typeof (strncat) __strncat_ppc attribute_hidden;
 extern __typeof (strncat) __strncat_power7 attribute_hidden;
+extern __typeof (strncat) __strncat_power8 attribute_hidden;
 
 libc_ifunc (strncat,
-            (hwcap & PPC_FEATURE_HAS_VSX)
+	    (hwcap & PPC_FEATURE2_ARCH_2_07)
+	    ? __strncat_power8
+	    : (hwcap & PPC_FEATURE_HAS_VSX)
             ? __strncat_power7
             : __strncat_ppc);
 #endif

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                                          |   10 ++++++++++
 sysdeps/powerpc/powerpc64/multiarch/Makefile       |    3 ++-
 .../powerpc/powerpc64/multiarch/ifunc-impl-list.c  |    3 +++
 .../{strncat-power7.c => strncat-power8.c}         |   16 ++++++++--------
 sysdeps/powerpc/powerpc64/multiarch/strncat.c      |    5 ++++-
 5 files changed, 27 insertions(+), 10 deletions(-)
 copy sysdeps/powerpc/powerpc64/multiarch/{strncat-power7.c => strncat-power8.c} (66%)


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