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author | Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com> | 2014-03-03 08:06:41 -0600 |
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committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2014-03-03 08:06:41 -0600 |
commit | c7debbdfacbef150aaf9113eb05ccaf2b9e7af6c (patch) | |
tree | baf78c9b58faa86b3996ae3745cb81fd50e2fb58 /sysdeps/powerpc/powerpc64/multiarch/strrchr-ppc64.c | |
parent | 235eed8644eb2deebf839b13b418dbd47bb14c5a (diff) | |
download | glibc-c7debbdfacbef150aaf9113eb05ccaf2b9e7af6c.tar.gz glibc-c7debbdfacbef150aaf9113eb05ccaf2b9e7af6c.tar.xz glibc-c7debbdfacbef150aaf9113eb05ccaf2b9e7af6c.zip |
PowerPC: strrchr optimization for POWER7/PPC64
This patch optimizes strrchr() for ppc64. It uses aligned memory access along with cmpb instruction and CPU prefetch to avoid cache misses for speed improvement.
Diffstat (limited to 'sysdeps/powerpc/powerpc64/multiarch/strrchr-ppc64.c')
-rw-r--r-- | sysdeps/powerpc/powerpc64/multiarch/strrchr-ppc64.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strrchr-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/strrchr-ppc64.c new file mode 100644 index 0000000000..5633a9f003 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/multiarch/strrchr-ppc64.c @@ -0,0 +1,33 @@ +/* Copyright (C) 2014 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 STRRCHR __strrchr_ppc +#undef weak_alias +#define weak_alias(name, aliasname) \ + extern __typeof (__strrchr_ppc) aliasname \ + __attribute__ ((weak, alias ("__strrchr_ppc"))); +#if !defined(NOT_IN_libc) && defined(SHARED) +# undef libc_hidden_builtin_def +# define libc_hidden_builtin_def(name) \ + __hidden_ver1(__strrchr_ppc, __GI_strrchr, __strrchr_ppc); +#endif + +extern __typeof (strrchr) __strrchr_ppc attribute_hidden; + +#include <string/strrchr.c> |