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authorRajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>2016-12-27 17:48:37 -0200
committerTulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>2016-12-28 11:44:31 -0200
commit9314d3545e6641063b490918e2e8716556ba20db (patch)
treecc3d6518db2c0a86db8dcbb22ee44e789a0a9920 /sysdeps/powerpc/powerpc64/power8/strchrnul.S
parentffcf0f1cb77dd0d902495fd066a96784f76f2c3a (diff)
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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/power8/strchrnul.S')
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diff --git a/sysdeps/powerpc/powerpc64/power8/strchrnul.S b/sysdeps/powerpc/powerpc64/power8/strchrnul.S
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+/* Optimized strchrnul implementation for PowerPC64/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/>. */
+
+#define USE_AS_STRCHRNUL 1
+#include <sysdeps/powerpc/powerpc64/power8/strchr.S>
+
+weak_alias (__strchrnul,strchrnul)
+libc_hidden_builtin_def (__strchrnul)