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S390: Refactor wcscmp ifunc handling.

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The ifunc handling for wcscmp 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.
Glibc internal calls will then also use the "newer" ifunc variant.

ChangeLog:

	* sysdeps/s390/multiarch/Makefile
	(sysdep_routines): Remove wcscmp variants.
	* sysdeps/s390/Makefile (sysdep_routines): Add wcscmp variants.
	* sysdeps/s390/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Refactor ifunc handling for wcscmp.
	* sysdeps/s390/multiarch/wcscmp-c.c: Move to ...
	* sysdeps/s390/wcscmp-c.c: ... here and adjust ifunc handling.
	* sysdeps/s390/multiarch/wcscmp-vx.S: Move to ...
	* sysdeps/s390/wcscmp-vx.S: ... here and adjust ifunc handling.
	* sysdeps/s390/multiarch/wcscmp.c: Move to ...
	* sysdeps/s390/wcscmp.c: ... here and adjust ifunc handling.
	* sysdeps/s390/ifunc-wcscmp.h: New file.
This commit is contained in:
Stefan Liebler
2018-12-18 13:57:21 +01:00
parent 814a76e1bc
commit 3459e23dd4
8 changed files with 127 additions and 26 deletions
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41
sysdeps/s390/wcscmp.c Normal file
View File

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/* Multiple versions of wcscmp.
Copyright (C) 2015-2018 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/>. */
#include <ifunc-wcscmp.h>
#if HAVE_WCSCMP_IFUNC
# define __wcscmp __redirect___wcscmp
# include <wchar.h>
# undef __wcscmp
# include <ifunc-resolve.h>
# if HAVE_WCSCMP_C
extern __typeof (__redirect___wcscmp) WCSCMP_C attribute_hidden;
# endif
# if HAVE_WCSCMP_Z13
extern __typeof (__redirect___wcscmp) WCSCMP_Z13 attribute_hidden;
# endif
s390_libc_ifunc_expr (__redirect___wcscmp, __wcscmp,
(HAVE_WCSCMP_Z13 && (hwcap & HWCAP_S390_VX))
? WCSCMP_Z13
: WCSCMP_DEFAULT
)
weak_alias (__wcscmp, wcscmp)
#endif