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| author | Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com> | 2017-04-13 11:29:20 +0530 |
|---|---|---|
| committer | Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com> | 2017-04-13 11:29:20 +0530 |
| commit | 249dcdb71b79e4c488a46c9027e0014c0bc27044 (patch) | |
| tree | a14c36ab652bb3d0bf47cac89205b57ae99793c9 /sysdeps/powerpc/powerpc64 | |
| parent | 158d5fa0e1906e7810bdc6ecb7bf598dcc3cd17d (diff) | |
| download | glibc-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')
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 |