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S390: Refactor wmemcmp ifunc handling.
The ifunc handling for wmemcmp is adjusted in order to omit ifunc variants if those will never be used as the minimum architecture level already supports newer CPUs by default. ChangeLog: * sysdeps/s390/multiarch/Makefile (sysdep_routines): Remove wmemcmp variants. * sysdeps/s390/Makefile (sysdep_routines): Add wmemcmp variants. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Refactor ifunc handling for wmemcmp. * sysdeps/s390/multiarch/wmemcmp-c.c: Move to ... * sysdeps/s390/wmemcmp-c.c: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wmemcmp-vx.S: Move to ... * sysdeps/s390/wmemcmp-vx.S: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wmemcmp.c: Move to ... * sysdeps/s390/wmemcmp.c: ... here and adjust ifunc handling. * sysdeps/s390/ifunc-wmemcmp.h: New file.
This commit is contained in:
Stefan Liebler
parent
d2a7436c1c
commit
25654a8c74
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 wmemcmp variants.
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* sysdeps/s390/Makefile (sysdep_routines): Add wmemcmp variants.
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* sysdeps/s390/multiarch/ifunc-impl-list.c
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(__libc_ifunc_impl_list): Refactor ifunc handling for wmemcmp.
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* sysdeps/s390/multiarch/wmemcmp-c.c: Move to ...
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* sysdeps/s390/wmemcmp-c.c: ... here and adjust ifunc handling.
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* sysdeps/s390/multiarch/wmemcmp-vx.S: Move to ...
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* sysdeps/s390/wmemcmp-vx.S: ... here and adjust ifunc handling.
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* sysdeps/s390/multiarch/wmemcmp.c: Move to ...
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* sysdeps/s390/wmemcmp.c: ... here and adjust ifunc handling.
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* sysdeps/s390/ifunc-wmemcmp.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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@ -100,5 +100,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \
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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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wmemset wmemset-vx wmemset-c \
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wmemcmp wmemcmp-vx wmemcmp-c
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endif
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52
sysdeps/s390/ifunc-wmemcmp.h
Normal file
52
sysdeps/s390/ifunc-wmemcmp.h
Normal file
@ -0,0 +1,52 @@
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/* wmemcmp 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_WMEMCMP_IFUNC 1
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#else
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# define HAVE_WMEMCMP_IFUNC 0
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#endif
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#ifdef HAVE_S390_VX_ASM_SUPPORT
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# define HAVE_WMEMCMP_IFUNC_AND_VX_SUPPORT HAVE_WMEMCMP_IFUNC
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#else
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# define HAVE_WMEMCMP_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 WMEMCMP_DEFAULT WMEMCMP_Z13
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# define HAVE_WMEMCMP_C 0
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# define HAVE_WMEMCMP_Z13 1
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#else
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# define WMEMCMP_DEFAULT WMEMCMP_C
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# define HAVE_WMEMCMP_C 1
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# define HAVE_WMEMCMP_Z13 HAVE_WMEMCMP_IFUNC_AND_VX_SUPPORT
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#endif
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#if HAVE_WMEMCMP_C
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# define WMEMCMP_C __wmemcmp_c
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#else
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# define WMEMCMP_C NULL
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#endif
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#if HAVE_WMEMCMP_Z13
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# define WMEMCMP_Z13 __wmemcmp_vx
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#else
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# define WMEMCMP_Z13 NULL
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#endif
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@ -1,7 +1,3 @@
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ifeq ($(subdir),wcsmbs)
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sysdep_routines += wmemcmp wmemcmp-vx wmemcmp-c
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endif
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ifeq ($(subdir),iconvdata)
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override define generate-8bit-table
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$(make-target-directory)
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@ -64,6 +64,7 @@
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#include <ifunc-wcscspn.h>
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#include <ifunc-wmemchr.h>
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#include <ifunc-wmemset.h>
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#include <ifunc-wmemcmp.h>
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/* Maximum number of IFUNC implementations. */
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#define MAX_IFUNC 3
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@ -658,17 +659,17 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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)
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#endif /* HAVE_WMEMSET_IFUNC */
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#ifdef HAVE_S390_VX_ASM_SUPPORT
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# define IFUNC_VX_IMPL(FUNC) \
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IFUNC_IMPL (i, name, FUNC, \
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IFUNC_IMPL_ADD (array, i, FUNC, dl_hwcap & HWCAP_S390_VX, \
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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 (wmemcmp);
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#endif /* HAVE_S390_VX_ASM_SUPPORT */
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#if HAVE_WMEMCMP_IFUNC
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IFUNC_IMPL (i, name, wmemcmp,
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# if HAVE_WMEMCMP_Z13
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IFUNC_IMPL_ADD (array, i, wmemcmp,
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dl_hwcap & HWCAP_S390_VX, WMEMCMP_Z13)
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# endif
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# if HAVE_WMEMCMP_C
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IFUNC_IMPL_ADD (array, i, wmemcmp, 1, WMEMCMP_C)
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# endif
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)
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#endif /* HAVE_WMEMCMP_IFUNC */
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return i;
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}
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@ -16,11 +16,12 @@
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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 WMEMCMP __wmemcmp_c
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#include <ifunc-wmemcmp.h>
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# include <wchar.h>
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extern __typeof (wmemcmp) __wmemcmp_c;
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#if HAVE_WMEMCMP_C
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# if HAVE_WMEMCMP_IFUNC
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# define WMEMCMP WMEMCMP_C
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# endif
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# include <wcsmbs/wmemcmp.c>
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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-wmemcmp.h>
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#if HAVE_WMEMCMP_Z13
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# include "sysdep.h"
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# include "asm-syntax.h"
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@ -37,7 +38,7 @@
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-v17=part of s2
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-v18=index of unequal
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*/
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ENTRY(__wmemcmp_vx)
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ENTRY(WMEMCMP_Z13)
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.machine "z13"
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.machinemode "zarch_nohighgprs"
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@ -145,5 +146,9 @@ ENTRY(__wmemcmp_vx)
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la %r2,0(%r5,%r2)
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la %r3,0(%r5,%r3)
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j .Lremaining
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END(__wmemcmp_vx)
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#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
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END(WMEMCMP_Z13)
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# if ! HAVE_WMEMCMP_IFUNC
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strong_alias (WMEMCMP_Z13, wmemcmp)
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# endif
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#endif
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@ -16,12 +16,23 @@
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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-wmemcmp.h>
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#if HAVE_WMEMCMP_IFUNC
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# include <wchar.h>
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# include <ifunc-resolve.h>
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s390_vx_libc_ifunc2 (__wmemcmp, wmemcmp)
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# if HAVE_WMEMCMP_C
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extern __typeof (wmemcmp) WMEMCMP_C attribute_hidden;
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# endif
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#else
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# include <wcsmbs/wmemcmp.c>
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#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
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# if HAVE_WMEMCMP_Z13
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extern __typeof (wmemcmp) WMEMCMP_Z13 attribute_hidden;
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# endif
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s390_libc_ifunc_expr (wmemcmp, wmemcmp,
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(HAVE_WMEMCMP_Z13 && (hwcap & HWCAP_S390_VX))
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? WMEMCMP_Z13
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: WMEMCMP_DEFAULT
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)
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#endif
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