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authorRajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>2017-04-13 11:29:20 +0530
committerRajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>2017-04-13 11:29:20 +0530
commit249dcdb71b79e4c488a46c9027e0014c0bc27044 (patch)
treea14c36ab652bb3d0bf47cac89205b57ae99793c9 /sysdeps/powerpc/powerpc64
parent158d5fa0e1906e7810bdc6ecb7bf598dcc3cd17d (diff)
downloadglibc-249dcdb71b79e4c488a46c9027e0014c0bc27044.tar.gz
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.
Diffstat (limited to 'sysdeps/powerpc/powerpc64')
-rw-r--r--sysdeps/powerpc/powerpc64/multiarch/Makefile3
-rw-r--r--sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c3
-rw-r--r--sysdeps/powerpc/powerpc64/multiarch/strncat-power8.c31
-rw-r--r--sysdeps/powerpc/powerpc64/multiarch/strncat.c5
4 files changed, 40 insertions, 2 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
index 38233a72c0..0eb3d0710d 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 30a013320b..bddec1a6f8 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-power8.c b/sysdeps/powerpc/powerpc64/multiarch/strncat-power8.c
new file mode 100644
index 0000000000..1ec1259b95
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncat-power8.c
@@ -0,0 +1,31 @@
+/* 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
+ 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, see
+ <http://www.gnu.org/licenses/ >. */
+
+#include <string.h>
+
+#define STRNCAT __strncat_power8
+
+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 1aa5c11ea4..ba3fe5cac4 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