summaryrefslogtreecommitdiff
path: root/sysdeps/powerpc/powerpc64/multiarch/strchr-power8.S
diff options
context:
space:
mode:
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/multiarch/strchr-power8.S
parentffcf0f1cb77dd0d902495fd066a96784f76f2c3a (diff)
downloadglibc-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.S39
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>