diff options
| author | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2014-03-20 15:28:07 -0500 |
|---|---|---|
| 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-power7.S | |
| 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-power7.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/multiarch/strpbrk-power7.S | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strpbrk-power7.S b/sysdeps/powerpc/powerpc64/multiarch/strpbrk-power7.S new file mode 100644 index 0000000000..663ca36568 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/multiarch/strpbrk-power7.S @@ -0,0 +1,40 @@ +/* Optimized strpbrk implementation for POWER7. + 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 <sysdep.h> + +#undef EALIGN +#define EALIGN(name, alignt, words) \ + .section ".text"; \ + ENTRY_2(__strpbrk_power7) \ + .align ALIGNARG(alignt); \ + EALIGN_W_##words; \ + BODY_LABEL(__strpbrk_power7): \ + cfi_startproc; \ + LOCALENTRY(__strpbrk_power7) + +#undef END +#define END(name) \ + cfi_endproc; \ + TRACEBACK(__strpbrk_power7) \ + END_2(__strpbrk_power7) + +#undef libc_hidden_builtin_def +#define libc_hidden_builtin_def(name) + +#include <sysdeps/powerpc/powerpc64/power7/strpbrk.S> |