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S390: Refactor wcscat ifunc handling.

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The ifunc handling for wcscat 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 wcscat variants.
	* sysdeps/s390/Makefile (sysdep_routines): Add wcscat variants.
	* sysdeps/s390/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Refactor ifunc handling for wcscat.
	* sysdeps/s390/multiarch/wcscat-c.c: Move to ...
	* sysdeps/s390/wcscat-c.c: ... here and adjust ifunc handling.
	* sysdeps/s390/multiarch/wcscat-vx.S: Move to ...
	* sysdeps/s390/wcscat-vx.S: ... here and adjust ifunc handling.
	* sysdeps/s390/multiarch/wcscat.c: Move to ...
	* sysdeps/s390/wcscat.c: ... here and adjust ifunc handling.
	* sysdeps/s390/ifunc-wcscat.h: New file.
This commit is contained in:
Stefan Liebler
2018-12-18 13:57:20 +01:00
parent c3081bcbd9
commit 3389cae427
8 changed files with 118 additions and 20 deletions
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39
sysdeps/s390/wcscat.c Normal file
View File

@@ -0,0 +1,39 @@
/* Multiple versions of wcscat.
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-wcscat.h>
#if HAVE_WCSCAT_IFUNC
# include <wchar.h>
# include <ifunc-resolve.h>
# if HAVE_WCSCAT_C
extern __typeof (__wcscat) WCSCAT_C attribute_hidden;
# endif
# if HAVE_WCSCAT_Z13
extern __typeof (__wcscat) WCSCAT_Z13 attribute_hidden;
# endif
s390_libc_ifunc_expr (__wcscat, __wcscat,
(HAVE_WCSCAT_Z13 && (hwcap & HWCAP_S390_VX))
? WCSCAT_Z13
: WCSCAT_DEFAULT
)
weak_alias (__wcscat, wcscat)
#endif