mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-28 13:31:13 +00:00
421749d693
This patch introduces the new arch13 ifunc variant for memmem. For needles longer than 9 bytes it is relying on the common-code implementation. For shorter needles it is using the new vstrs instruction which is able to search a substring within a vector register. ChangeLog: * sysdeps/s390/Makefile (sysdep_routines): Add memmem-arch13. * sysdeps/s390/ifunc-memmem.h (HAVE_MEMMEM_ARCH13, MEMMEM_ARCH13, MEMMEM_Z13_ONLY_USED_AS_FALLBACK, HAVE_MEMMEM_IFUNC_AND_ARCH13_SUPPORT): New defines. * sysdeps/s390/memmem-arch13.S: New file. * sysdeps/s390/memmem-vx.c: Omit GI symbol for z13 memmem ifunc variant if it is only used as fallback. * sysdeps/s390/memmem.c (memmem): Add arch13 variant in ifunc selector. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add ifunc variant for arch13 memmem.
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/* Default memmem implementation with vector string functions for S/390.
|
|
Copyright (C) 2018-2019 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 <ifunc-memmem.h>
|
|
|
|
#if HAVE_MEMMEM_Z13
|
|
# include <string.h>
|
|
# if HAVE_MEMMEM_IFUNC || MEMMEM_Z13_ONLY_USED_AS_FALLBACK
|
|
|
|
# ifndef _LIBC
|
|
# define memmem MEMMEM_Z13
|
|
# else
|
|
# define __memmem MEMMEM_Z13
|
|
# endif
|
|
|
|
# if defined SHARED && IS_IN (libc)
|
|
# undef libc_hidden_def
|
|
# undef libc_hidden_weak
|
|
|
|
# if HAVE_MEMMEM_C || MEMMEM_Z13_ONLY_USED_AS_FALLBACK
|
|
# define libc_hidden_def(name)
|
|
# define libc_hidden_weak(name)
|
|
# else
|
|
# define libc_hidden_def(name) \
|
|
strong_alias (__memmem_vx, __memmem_vx_1); \
|
|
__hidden_ver1 (__memmem_vx, __GI___memmem, __memmem_vx);
|
|
|
|
# define libc_hidden_weak(name) \
|
|
__hidden_ver1 (__memmem_vx_1, __GI_memmem, __memmem_vx_1) __attribute__((weak));
|
|
# endif
|
|
# endif
|
|
|
|
# undef weak_alias
|
|
# define weak_alias(a, b)
|
|
# endif
|
|
|
|
# ifdef USE_MULTIARCH
|
|
extern __typeof (memchr) __memchr_vx attribute_hidden;
|
|
# define memchr __memchr_vx
|
|
|
|
extern __typeof (memcmp) __memcmp_z196 attribute_hidden;
|
|
# define memcmp __memcmp_z196
|
|
# endif
|
|
|
|
# include <string/memmem.c>
|
|
#endif
|