powerpc: strcasecmp/strncasecmp optmization for power8

This implementation utilizes vectors to improve performance
compared to current byte by byte implementation for POWER7.
The performance improvement is upto 4x.  This patch is tested
on powerpc64 and powerpc64le.

1 files changed, 20 insertions, 0 deletions

diff --git a/sysdeps/powerpc/powerpc64/power8/strncase.S b/sysdeps/powerpc/powerpc64/power8/strncase.S
new file mode 100644
index 0000000000..7ce2ed0968
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power8/strncase.S
@@ -0,0 +1,20 @@
+/* Optimized strncasecmp 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/>.  */
+
+#define USE_AS_STRNCASECMP 1
+#include <sysdeps/powerpc/powerpc64/power8/strcasecmp.S>