mirror of
git://sourceware.org/git/glibc.git
synced 2025-03-06 20:58:33 +01:00
b9182c793c
Optimized memchr for POWER10 based on existing rawmemchr and strlen. Reordering instructions and loop unrolling helped in getting better performance. Reviewed-by: Rajalakshmi Srinivasaraghavan <rajis@linux.ibm.com>
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/* Multiple versions of memchr.
|
|
Copyright (C) 2013-2023 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#if IS_IN (libc)
|
|
# include <string.h>
|
|
# include <shlib-compat.h>
|
|
# include "init-arch.h"
|
|
|
|
extern __typeof (__memchr) __memchr_ppc attribute_hidden;
|
|
extern __typeof (__memchr) __memchr_power7 attribute_hidden;
|
|
extern __typeof (__memchr) __memchr_power8 attribute_hidden;
|
|
|
|
# ifdef __LITTLE_ENDIAN__
|
|
extern __typeof (__memchr) __memchr_power10 attribute_hidden;
|
|
# endif
|
|
/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
|
|
ifunc symbol properly. */
|
|
libc_ifunc (__memchr,
|
|
# ifdef __LITTLE_ENDIAN__
|
|
(hwcap2 & PPC_FEATURE2_ARCH_3_1
|
|
&& hwcap & PPC_FEATURE_HAS_VSX)
|
|
? __memchr_power10 :
|
|
# endif
|
|
(hwcap2 & PPC_FEATURE2_ARCH_2_07
|
|
&& hwcap & PPC_FEATURE_HAS_ALTIVEC)
|
|
? __memchr_power8 :
|
|
(hwcap & PPC_FEATURE_ARCH_2_06)
|
|
? __memchr_power7
|
|
: __memchr_ppc);
|
|
|
|
weak_alias (__memchr, memchr)
|
|
libc_hidden_builtin_def (memchr)
|
|
#else
|
|
#include <string/memchr.c>
|
|
#endif
|