mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 13:13:43 +08:00
6f47401bd5
This patch introduces the new arch13 ifunc variant for strstr. For needles longer than 9 charachters 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 strstr-arch13. * sysdeps/s390/ifunc-strstr.h (HAVE_STRSTR_ARCH13, STRSTR_ARCH13, STRSTR_Z13_ONLY_USED_AS_FALLBACK, HAVE_STRSTR_IFUNC_AND_ARCH13_SUPPORT): New defines. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add ifunc variant for arch13 strstr. * sysdeps/s390/strstr-arch13.S: New file. * sysdeps/s390/strstr-vx.c: Omit GI symbol for z13 strstr ifunc variant if it is only used as fallback. * sysdeps/s390/strstr.c (strstr): Add arch13 variant in ifunc selector.
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/* strstr variant information on S/390 version.
|
|
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/>. */
|
|
|
|
#if defined USE_MULTIARCH && IS_IN (libc) \
|
|
&& ! defined HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT
|
|
# define HAVE_STRSTR_IFUNC 1
|
|
#else
|
|
# define HAVE_STRSTR_IFUNC 0
|
|
#endif
|
|
|
|
#ifdef HAVE_S390_VX_ASM_SUPPORT
|
|
# define HAVE_STRSTR_IFUNC_AND_VX_SUPPORT HAVE_STRSTR_IFUNC
|
|
#else
|
|
# define HAVE_STRSTR_IFUNC_AND_VX_SUPPORT 0
|
|
#endif
|
|
|
|
#ifdef HAVE_S390_ARCH13_ASM_SUPPORT
|
|
# define HAVE_STRSTR_IFUNC_AND_ARCH13_SUPPORT HAVE_STRSTR_IFUNC
|
|
#else
|
|
# define HAVE_STRSTR_IFUNC_AND_ARCH13_SUPPORT 0
|
|
#endif
|
|
|
|
#if defined HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT
|
|
# define STRSTR_DEFAULT STRSTR_ARCH13
|
|
# define HAVE_STRSTR_C 0
|
|
# define HAVE_STRSTR_Z13 1
|
|
# define STRSTR_Z13_ONLY_USED_AS_FALLBACK 1
|
|
# define HAVE_STRSTR_ARCH13 1
|
|
#elif defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
|
|
# define STRSTR_DEFAULT STRSTR_Z13
|
|
# define HAVE_STRSTR_C 0
|
|
# define HAVE_STRSTR_Z13 1
|
|
# define HAVE_STRSTR_ARCH13 HAVE_STRSTR_IFUNC_AND_ARCH13_SUPPORT
|
|
#else
|
|
# define STRSTR_DEFAULT STRSTR_C
|
|
# define HAVE_STRSTR_C 1
|
|
# define HAVE_STRSTR_Z13 HAVE_STRSTR_IFUNC_AND_VX_SUPPORT
|
|
# define HAVE_STRSTR_ARCH13 HAVE_STRSTR_IFUNC_AND_ARCH13_SUPPORT
|
|
#endif
|
|
|
|
#ifndef STRSTR_Z13_ONLY_USED_AS_FALLBACK
|
|
# define STRSTR_Z13_ONLY_USED_AS_FALLBACK 0
|
|
#endif
|
|
|
|
#if HAVE_STRSTR_C
|
|
# define STRSTR_C __strstr_c
|
|
#else
|
|
# define STRSTR_C NULL
|
|
#endif
|
|
|
|
#if HAVE_STRSTR_Z13
|
|
# define STRSTR_Z13 __strstr_vx
|
|
#else
|
|
# define STRSTR_Z13 NULL
|
|
#endif
|
|
|
|
#if HAVE_STRSTR_ARCH13
|
|
# define STRSTR_ARCH13 __strstr_arch13
|
|
#else
|
|
# define STRSTR_ARCH13 NULL
|
|
#endif
|