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author | Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com> | 2016-12-27 17:48:37 -0200 |
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committer | Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> | 2016-12-28 11:44:31 -0200 |
commit | 9314d3545e6641063b490918e2e8716556ba20db (patch) | |
tree | cc3d6518db2c0a86db8dcbb22ee44e789a0a9920 /sysdeps/powerpc/powerpc64/multiarch/strchr-power8.S | |
parent | ffcf0f1cb77dd0d902495fd066a96784f76f2c3a (diff) | |
download | glibc-9314d3545e6641063b490918e2e8716556ba20db.tar.gz |
powerpc64: strchr/strchrnul optimization for power8
The P7 code is used for <=32B strings and for > 32B vectorized loops are used.
This shows as an average 25% improvement depending on the position of search
character. The performance is same for shorter strings.
Tested on ppc64 and ppc64le.
Diffstat (limited to 'sysdeps/powerpc/powerpc64/multiarch/strchr-power8.S')
-rw-r--r-- | sysdeps/powerpc/powerpc64/multiarch/strchr-power8.S | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strchr-power8.S b/sysdeps/powerpc/powerpc64/multiarch/strchr-power8.S new file mode 100644 index 0000000000..dd0b7f5b28 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/multiarch/strchr-power8.S @@ -0,0 +1,39 @@ +/* Optimized strchr implementation for POWER8. + Copyright (C) 2016 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 ENTRY +#define ENTRY(name) \ + .section ".text"; \ + ENTRY_2(__strchr_power8) \ + .align ALIGNARG(2); \ + BODY_LABEL(__strchr_power8): \ + cfi_startproc; \ + LOCALENTRY(__strchr_power8) + +#undef END +#define END(name) \ + cfi_endproc; \ + TRACEBACK(__strchr_power8) \ + END_2(__strchr_power8) + +#undef libc_hidden_builtin_def +#define libc_hidden_builtin_def(name) + +#include <sysdeps/powerpc/powerpc64/power8/strchr.S> |