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S390: Refactor wcsspn ifunc handling.
The ifunc handling for wcsspn is adjusted in order to omit ifunc if the minimum architecture level already supports newer CPUs by default. Unfortunately the c ifunc variant can't be omitted at all as it is used by the z13 ifunc variant as fallback if the pointers are not 4-byte aligned. Glibc internal calls will use the "newer" ifunc variant. ChangeLog: * sysdeps/s390/multiarch/Makefile (sysdep_routines): Remove wcsspn variants. * sysdeps/s390/Makefile (sysdep_routines): Add wcsspn variants. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Refactor ifunc handling for wcsspn. * sysdeps/s390/multiarch/wcsspn-c.c: Move to ... * sysdeps/s390/wcsspn-c.c: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wcsspn-vx.S: Move to ... * sysdeps/s390/wcsspn-vx.S: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wcsspn.c: Move to ... * sysdeps/s390/wcsspn.c: ... here and adjust ifunc handling. * sysdeps/s390/ifunc-wcsspn.h: New file.
This commit is contained in:
Stefan Liebler
parent
4753713aae
commit
8507e83190
15
ChangeLog
15
ChangeLog
@ -1,3 +1,18 @@
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2018-12-18 Stefan Liebler <stli@linux.ibm.com>
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* sysdeps/s390/multiarch/Makefile
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(sysdep_routines): Remove wcsspn variants.
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* sysdeps/s390/Makefile (sysdep_routines): Add wcsspn variants.
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* sysdeps/s390/multiarch/ifunc-impl-list.c
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(__libc_ifunc_impl_list): Refactor ifunc handling for wcsspn.
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* sysdeps/s390/multiarch/wcsspn-c.c: Move to ...
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* sysdeps/s390/wcsspn-c.c: ... here and adjust ifunc handling.
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* sysdeps/s390/multiarch/wcsspn-vx.S: Move to ...
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* sysdeps/s390/wcsspn-vx.S: ... here and adjust ifunc handling.
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* sysdeps/s390/multiarch/wcsspn.c: Move to ...
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* sysdeps/s390/wcsspn.c: ... here and adjust ifunc handling.
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* sysdeps/s390/ifunc-wcsspn.h: New file.
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2018-12-18 Stefan Liebler <stli@linux.ibm.com>
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* sysdeps/s390/multiarch/Makefile
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@ -95,5 +95,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \
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wcsncmp wcsncmp-vx wcsncmp-c \
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wcschr wcschr-vx wcschr-c \
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wcschrnul wcschrnul-vx wcschrnul-c \
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wcsrchr wcsrchr-vx wcsrchr-c
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wcsrchr wcsrchr-vx wcsrchr-c \
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wcsspn wcsspn-vx wcsspn-c
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endif
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53
sysdeps/s390/ifunc-wcsspn.h
Normal file
53
sysdeps/s390/ifunc-wcsspn.h
Normal file
@ -0,0 +1,53 @@
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/* wcsspn variant information on S/390 version.
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Copyright (C) 2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#if defined USE_MULTIARCH && IS_IN (libc) \
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&& ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
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# define HAVE_WCSSPN_IFUNC 1
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#else
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# define HAVE_WCSSPN_IFUNC 0
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#endif
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#ifdef HAVE_S390_VX_ASM_SUPPORT
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# define HAVE_WCSSPN_IFUNC_AND_VX_SUPPORT HAVE_WCSSPN_IFUNC
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#else
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# define HAVE_WCSSPN_IFUNC_AND_VX_SUPPORT 0
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#endif
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#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
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# define WCSSPN_DEFAULT WCSSPN_Z13
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/* The z13 ifunc variant is using the common code variant as fallback! */
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# define HAVE_WCSSPN_C 1
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# define HAVE_WCSSPN_Z13 1
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#else
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# define WCSSPN_DEFAULT WCSSPN_C
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# define HAVE_WCSSPN_C 1
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# define HAVE_WCSSPN_Z13 HAVE_WCSSPN_IFUNC_AND_VX_SUPPORT
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#endif
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#if HAVE_WCSSPN_C
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# define WCSSPN_C __wcsspn_c
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#else
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# define WCSSPN_C NULL
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#endif
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#if HAVE_WCSSPN_Z13
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# define WCSSPN_Z13 __wcsspn_vx
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#else
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# define WCSSPN_Z13 NULL
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#endif
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@ -1,6 +1,5 @@
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ifeq ($(subdir),wcsmbs)
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sysdep_routines += wcsspn wcsspn-vx wcsspn-c \
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wcspbrk wcspbrk-vx wcspbrk-c \
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sysdep_routines += wcspbrk wcspbrk-vx wcspbrk-c \
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wcscspn wcscspn-vx wcscspn-c \
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wmemchr wmemchr-vx wmemchr-c \
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wmemset wmemset-vx wmemset-c \
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@ -59,6 +59,7 @@
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#include <ifunc-wcschr.h>
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#include <ifunc-wcschrnul.h>
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#include <ifunc-wcsrchr.h>
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#include <ifunc-wcsspn.h>
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/* Maximum number of IFUNC implementations. */
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#define MAX_IFUNC 3
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@ -593,6 +594,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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)
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#endif /* HAVE_WCSRCHR_IFUNC */
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#if HAVE_WCSSPN_IFUNC
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IFUNC_IMPL (i, name, wcsspn,
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# if HAVE_WCSSPN_Z13
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IFUNC_IMPL_ADD (array, i, wcsspn,
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dl_hwcap & HWCAP_S390_VX, WCSSPN_Z13)
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# endif
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# if HAVE_WCSSPN_C
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IFUNC_IMPL_ADD (array, i, wcsspn, 1, WCSSPN_C)
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# endif
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)
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#endif /* HAVE_WCSSPN_IFUNC */
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#ifdef HAVE_S390_VX_ASM_SUPPORT
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# define IFUNC_VX_IMPL(FUNC) \
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@ -601,8 +614,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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__##FUNC##_vx) \
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IFUNC_IMPL_ADD (array, i, FUNC, 1, __##FUNC##_c))
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IFUNC_VX_IMPL (wcsspn);
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IFUNC_VX_IMPL (wcspbrk);
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IFUNC_VX_IMPL (wcscspn);
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@ -16,16 +16,22 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
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# define WCSSPN __wcsspn_c
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#include <ifunc-wcsspn.h>
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# include <wchar.h>
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extern __typeof (wcsspn) __wcsspn_c;
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# ifdef SHARED
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#if HAVE_WCSSPN_C
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# if HAVE_WCSSPN_IFUNC || HAVE_WCSSPN_Z13
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# define WCSSPN WCSSPN_C
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# if defined SHARED && IS_IN (libc)
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# undef libc_hidden_def
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# if ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
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# define libc_hidden_def(name) \
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__hidden_ver1 (__wcsspn_c, __GI_wcsspn, __wcsspn_c);
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# endif /* SHARED */
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# else
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# define libc_hidden_def(name)
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# endif
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# endif
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# endif
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# include <wcsmbs/wcsspn.c>
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#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
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#endif
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@ -16,7 +16,8 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
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#include <ifunc-wcsspn.h>
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#if HAVE_WCSSPN_Z13
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# include "sysdep.h"
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# include "asm-syntax.h"
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@ -57,7 +58,7 @@
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otherwise =0;
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r9: loaded byte count of vlbb accept-string
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*/
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ENTRY(__wcsspn_vx)
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ENTRY(WCSSPN_Z13)
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.machine "z13"
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.machinemode "zarch_nohighgprs"
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@ -265,6 +266,15 @@ ENTRY(__wcsspn_vx)
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j .Lslow_next_acc_notonbb /* ... and search for zero in
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fully loaded vreg again. */
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.Lfallback:
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jg __wcsspn_c
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END(__wcsspn_vx)
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#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
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jg WCSSPN_C
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END(WCSSPN_Z13)
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# if ! HAVE_WCSSPN_IFUNC
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strong_alias (WCSSPN_Z13, wcsspn)
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# endif
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# if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT \
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&& defined SHARED && IS_IN (libc)
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strong_alias (WCSSPN_Z13, __GI_wcsspn)
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# endif
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#endif
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@ -16,14 +16,24 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
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#include <ifunc-wcsspn.h>
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#if HAVE_WCSSPN_IFUNC
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# define wcsspn __redirect_wcsspn
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# include <wchar.h>
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# undef wcsspn
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# include <ifunc-resolve.h>
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# if HAVE_WCSSPN_C
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extern __typeof (__redirect_wcsspn) WCSSPN_C attribute_hidden;
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# endif
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s390_vx_libc_ifunc2_redirected (__redirect_wcsspn, __wcsspn, wcsspn)
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# if HAVE_WCSSPN_Z13
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extern __typeof (__redirect_wcsspn) WCSSPN_Z13 attribute_hidden;
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# endif
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#else
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# include <wcsmbs/wcsspn.c>
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#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
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s390_libc_ifunc_expr (__redirect_wcsspn, wcsspn,
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(HAVE_WCSSPN_Z13 && (hwcap & HWCAP_S390_VX))
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? WCSSPN_Z13
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: WCSSPN_DEFAULT
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)
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#endif
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