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2e02d0b7a9
The ifunc handling for wcslen 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. ChangeLog: * sysdeps/s390/multiarch/Makefile (sysdep_routines): Remove wcslen variants. * sysdeps/s390/Makefile (sysdep_routines): Add wcslen variants. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Refactor ifunc handling for wcslen. * sysdeps/s390/multiarch/wcslen-c.c: Move to ... * sysdeps/s390/wcslen-c.c: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wcslen-vx.S: Move to ... * sysdeps/s390/wcslen-vx.S: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wcslen.c: Move to ... * sysdeps/s390/wcslen.c: ... here and adjust ifunc handling. * sysdeps/s390/ifunc-wcslen.h: New file.
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/* Multiple versions of wcslen.
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Copyright (C) 2015-2018 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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#include <ifunc-wcslen.h>
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#if HAVE_WCSLEN_IFUNC
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# include <wchar.h>
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# include <ifunc-resolve.h>
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# if HAVE_WCSLEN_C
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extern __typeof (__wcslen) WCSLEN_C attribute_hidden;
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# endif
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# if HAVE_WCSLEN_Z13
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extern __typeof (__wcslen) WCSLEN_Z13 attribute_hidden;
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# endif
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s390_libc_ifunc_expr (__wcslen, __wcslen,
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(HAVE_WCSLEN_Z13 && (hwcap & HWCAP_S390_VX))
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? WCSLEN_Z13
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: WCSLEN_DEFAULT
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)
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weak_alias (__wcslen, wcslen)
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#endif
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