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S390: Refactor strcat ifunc handling.

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The ifunc handling for strcat 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 strcat variants.
	* sysdeps/s390/Makefile (sysdep_routines): Add strcat variants.
	* sysdeps/s390/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Refactor ifunc handling for strcat.
	* sysdeps/s390/multiarch/strcat-c.c: Move to ...
	* sysdeps/s390/strcat-c.c: ... here and adjust ifunc handling.
	* sysdeps/s390/multiarch/strcat-vx.S: Move to ...
	* sysdeps/s390/strcat-vx.S: ... here and adjust ifunc handling.
	* sysdeps/s390/multiarch/strcat.c: Move to ...
	* sysdeps/s390/strcat.c: ... here and adjust ifunc handling.
	* sysdeps/s390/ifunc-strcat.h: New file.
This commit is contained in:
Stefan Liebler
2018-12-18 13:57:12 +01:00
parent 25218822bd
commit 8e5a0afbbf
8 changed files with 123 additions and 21 deletions
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40
sysdeps/s390/strcat.c Normal file
View File

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/* Multiple versions of strcat.
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-strcat.h>
#if HAVE_STRCAT_IFUNC
# define strcat __redirect_strcat
# include <string.h>
# undef strcat
# include <ifunc-resolve.h>
# if HAVE_STRCAT_C
extern __typeof (__redirect_strcat) STRCAT_C attribute_hidden;
# endif
# if HAVE_STRCAT_Z13
extern __typeof (__redirect_strcat) STRCAT_Z13 attribute_hidden;
# endif
s390_libc_ifunc_expr (__redirect_strcat, strcat,
(HAVE_STRCAT_Z13 && (hwcap & HWCAP_S390_VX))
? STRCAT_Z13
: STRCAT_DEFAULT
)
#endif