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c7e7cd266e
The ifunc handling for wcsnlen 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 wcsnlen variants. * sysdeps/s390/Makefile (sysdep_routines): Add wcsnlen variants. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Refactor ifunc handling for wcsnlen. * sysdeps/s390/multiarch/wcsnlen-c.c: Move to ... * sysdeps/s390/wcsnlen-c.c: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wcsnlen-vx.S: Move to ... * sysdeps/s390/wcsnlen-vx.S: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wcsnlen.c: Move to ... * sysdeps/s390/wcsnlen.c: ... here and adjust ifunc handling. * sysdeps/s390/ifunc-wcsnlen.h: New file.
54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
/* wcsnlen 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_WCSNLEN_IFUNC 1
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#else
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# define HAVE_WCSNLEN_IFUNC 0
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#endif
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#ifdef HAVE_S390_VX_ASM_SUPPORT
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# define HAVE_WCSNLEN_IFUNC_AND_VX_SUPPORT HAVE_WCSNLEN_IFUNC
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#else
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# define HAVE_WCSNLEN_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 WCSNLEN_DEFAULT WCSNLEN_Z13
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/* The z13 ifunc variant is using the common code variant as fallback! */
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# define HAVE_WCSNLEN_C 1
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# define HAVE_WCSNLEN_Z13 1
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#else
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# define WCSNLEN_DEFAULT WCSNLEN_C
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# define HAVE_WCSNLEN_C 1
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# define HAVE_WCSNLEN_Z13 HAVE_WCSNLEN_IFUNC_AND_VX_SUPPORT
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#endif
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#if HAVE_WCSNLEN_C
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# define WCSNLEN_C __wcsnlen_c
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#else
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# define WCSNLEN_C NULL
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#endif
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#if HAVE_WCSNLEN_Z13
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# define WCSNLEN_Z13 __wcsnlen_vx
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#else
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# define WCSNLEN_Z13 NULL
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#endif
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