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| author | Stefan Liebler <stli@linux.ibm.com> | 2018-12-18 13:57:24 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2018-12-18 13:57:24 +0100 |
| commit | d2a7436c1c6144bbba2eb2a7b25db9b90515f0e6 (patch) | |
| tree | 1669611ec49e0be24022f24985efe2efcda9f918 /sysdeps/s390/wmemset.c | |
| parent | c62534ae524111eae48b2c2adf3f9a2ca90824f5 (diff) | |
| download | glibc-d2a7436c1c6144bbba2eb2a7b25db9b90515f0e6.zip glibc-d2a7436c1c6144bbba2eb2a7b25db9b90515f0e6.tar.gz glibc-d2a7436c1c6144bbba2eb2a7b25db9b90515f0e6.tar.bz2 | |
S390: Refactor wmemset ifunc handling.
The ifunc handling for wmemset 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 wmemset variants.
* sysdeps/s390/Makefile (sysdep_routines): Add wmemset variants.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Refactor ifunc handling for wmemset.
* sysdeps/s390/multiarch/wmemset-c.c: Move to ...
* sysdeps/s390/wmemset-c.c: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wmemset-vx.S: Move to ...
* sysdeps/s390/wmemset-vx.S: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wmemset.c: Move to ...
* sysdeps/s390/wmemset.c: ... here and adjust ifunc handling.
* sysdeps/s390/ifunc-wmemset.h: New file.
Diffstat (limited to 'sysdeps/s390/wmemset.c')
| -rw-r--r-- | sysdeps/s390/wmemset.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/sysdeps/s390/wmemset.c b/sysdeps/s390/wmemset.c new file mode 100644 index 0000000..6118754 --- /dev/null +++ b/sysdeps/s390/wmemset.c @@ -0,0 +1,43 @@ +/* Multiple versions of wmemset. + 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-wmemset.h> + +#if HAVE_WMEMSET_IFUNC +# define wmemset __redirect_wmemset +# define __wmemset __redirect___wmemset +# include <wchar.h> +# undef wmemset +# undef __wmemset +# include <ifunc-resolve.h> + +# if HAVE_WMEMSET_C +extern __typeof (__redirect___wmemset) WMEMSET_C attribute_hidden; +# endif + +# if HAVE_WMEMSET_Z13 +extern __typeof (__redirect___wmemset) WMEMSET_Z13 attribute_hidden; +# endif + +s390_libc_ifunc_expr (__redirect___wmemset, __wmemset, + (HAVE_WMEMSET_Z13 && (hwcap & HWCAP_S390_VX)) + ? WMEMSET_Z13 + : WMEMSET_DEFAULT + ) +weak_alias (__wmemset, wmemset) +#endif |