mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-03 18:31:04 +00:00
83d1cc42d8
This version uses general register based memory instruction to load
data, because vector register based is slightly slower in emag.
Character-matching is performed on 16-byte (both size and alignment)
memory block in parallel each iteration.
* sysdeps/aarch64/memchr.S (__memchr): Rename to MEMCHR.
[!MEMCHR](MEMCHR): Set to __memchr.
* sysdeps/aarch64/multiarch/Makefile (sysdep_routines):
Add memchr_generic and memchr_nosimd.
* sysdeps/aarch64/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Add memchr ifuncs.
* sysdeps/aarch64/multiarch/memchr.c: New file.
* sysdeps/aarch64/multiarch/memchr_generic.S: Likewise.
* sysdeps/aarch64/multiarch/memchr_nosimd.S: Likewise.
34 lines
1.2 KiB
ArmAsm
34 lines
1.2 KiB
ArmAsm
/* Memchr for aarch64, default version for internal use.
|
|
Copyright (C) 2018 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)
|
|
# define MEMCHR __memchr_generic
|
|
|
|
/* Do not hide the generic version of memchr, we use it internally. */
|
|
# undef libc_hidden_builtin_def
|
|
# define libc_hidden_builtin_def(name)
|
|
|
|
/* Add a hidden definition for use within libc.so. */
|
|
# ifdef SHARED
|
|
.globl __GI_memchr; __GI_memchr = __memchr_generic
|
|
# endif
|
|
#endif
|
|
|
|
# include "../memchr.S"
|