glibc/sysdeps/powerpc/powerpc64/multiarch/strcasestr.c
Rajalakshmi Srinivasaraghavan e413b14e18 powerpc: strcasestr optmization for power8
This patch optimizes strcasestr function for power >= 8 systems.  The average
improvement of this optimization is ~40% and compares 16 bytes at a time
using vector instructions.  This patch is tested on powerpc64 and powerpc64le.
2016-04-22 19:23:13 +05:30

38 lines
1.3 KiB
C

/* Multiple versions of strcasestr.
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/>. */
#if IS_IN (libc)
# include <string.h>
# include <shlib-compat.h>
# include "init-arch.h"
extern __typeof (__strcasestr) __strcasestr_ppc attribute_hidden;
extern __typeof (__strcasestr) __strcasestr_power8 attribute_hidden;
/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
ifunc symbol properly. */
libc_ifunc (__strcasestr,
(hwcap2 & PPC_FEATURE2_ARCH_2_07)
? __strcasestr_power8
: __strcasestr_ppc);
weak_alias (__strcasestr, strcasestr)
#else
#include <string/strcasestr.c>
#endif