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author | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2014-03-20 15:28:07 -0500 |
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committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2014-03-20 19:46:13 -0500 |
commit | 6f23d0939e9651d8ac3c77a835fb6464b35a1dc4 (patch) | |
tree | 973400ed55f2eb85767f120cc41c33337abef187 /sysdeps/powerpc/powerpc64/multiarch/strpbrk.c | |
parent | 8c92dfff412c20dc0c483ea68444d093a5672de0 (diff) | |
download | glibc-6f23d0939e9651d8ac3c77a835fb6464b35a1dc4.tar.gz glibc-6f23d0939e9651d8ac3c77a835fb6464b35a1dc4.tar.xz glibc-6f23d0939e9651d8ac3c77a835fb6464b35a1dc4.zip |
PowerPC: optimized strpbrk for POWER7
This patch add an optimized strpbrk for POWER7 by using a different algorithm than default implementation: it constructs a table based on the 'accept' argument and use this table to check for any occurance on the input string. The idea is similar as x86_64 uses. For PowerPC some tunings were added, such as unroll loops and memory clear using VSX instructions.
Diffstat (limited to 'sysdeps/powerpc/powerpc64/multiarch/strpbrk.c')
-rw-r--r-- | sysdeps/powerpc/powerpc64/multiarch/strpbrk.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strpbrk.c b/sysdeps/powerpc/powerpc64/multiarch/strpbrk.c new file mode 100644 index 0000000000..8b05536ae1 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/multiarch/strpbrk.c @@ -0,0 +1,31 @@ +/* Multiple versions of strpbrk. PowerPC64 version. + 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/>. */ + +#ifndef NOT_IN_libc +# include <string.h> +# include <shlib-compat.h> +# include "init-arch.h" + +extern __typeof (strpbrk) __strpbrk_ppc attribute_hidden; +extern __typeof (strpbrk) __strpbrk_power7 attribute_hidden; + +libc_ifunc (strpbrk, + (hwcap & PPC_FEATURE_HAS_VSX) + ? __strpbrk_power7 + : __strpbrk_ppc); +#endif |