mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-11 22:00:08 +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.
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/* memmem 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_MEMMEM_IFUNC 1
|
|
#else
|
|
# define HAVE_MEMMEM_IFUNC 0
|
|
#endif
|
|
|
|
#ifdef HAVE_S390_VX_ASM_SUPPORT
|
|
# define HAVE_MEMMEM_IFUNC_AND_VX_SUPPORT HAVE_MEMMEM_IFUNC
|
|
#else
|
|
# define HAVE_MEMMEM_IFUNC_AND_VX_SUPPORT 0
|
|
#endif
|
|
|
|
#ifdef HAVE_S390_ARCH13_ASM_SUPPORT
|
|
# define HAVE_MEMMEM_IFUNC_AND_ARCH13_SUPPORT HAVE_MEMMEM_IFUNC
|
|
#else
|
|
# define HAVE_MEMMEM_IFUNC_AND_ARCH13_SUPPORT 0
|
|
#endif
|
|
|
|
#if defined HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT
|
|
# define MEMMEM_DEFAULT MEMMEM_ARCH13
|
|
# define HAVE_MEMMEM_C 0
|
|
# define HAVE_MEMMEM_Z13 1
|
|
# define MEMMEM_Z13_ONLY_USED_AS_FALLBACK 1
|
|
# define HAVE_MEMMEM_ARCH13 1
|
|
#elif defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
|
|
# define MEMMEM_DEFAULT MEMMEM_Z13
|
|
# define HAVE_MEMMEM_C 0
|
|
# define HAVE_MEMMEM_Z13 1
|
|
# define HAVE_MEMMEM_ARCH13 HAVE_MEMMEM_IFUNC_AND_ARCH13_SUPPORT
|
|
#else
|
|
# define MEMMEM_DEFAULT MEMMEM_C
|
|
# define HAVE_MEMMEM_C 1
|
|
# define HAVE_MEMMEM_Z13 HAVE_MEMMEM_IFUNC_AND_VX_SUPPORT
|
|
# define HAVE_MEMMEM_ARCH13 HAVE_MEMMEM_IFUNC_AND_ARCH13_SUPPORT
|
|
#endif
|
|
|
|
#ifndef MEMMEM_Z13_ONLY_USED_AS_FALLBACK
|
|
# define MEMMEM_Z13_ONLY_USED_AS_FALLBACK 0
|
|
#endif
|
|
|
|
#if HAVE_MEMMEM_C
|
|
# define MEMMEM_C __memmem_c
|
|
#else
|
|
# define MEMMEM_C NULL
|
|
#endif
|
|
|
|
#if HAVE_MEMMEM_Z13
|
|
# define MEMMEM_Z13 __memmem_vx
|
|
#else
|
|
# define MEMMEM_Z13 NULL
|
|
#endif
|
|
|
|
#if HAVE_MEMMEM_ARCH13
|
|
# define MEMMEM_ARCH13 __memmem_arch13
|
|
#else
|
|
# define MEMMEM_ARCH13 NULL
|
|
#endif
|