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| author | Stefan Liebler <stli@linux.ibm.com> | 2018-12-18 13:57:19 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2018-12-18 13:57:19 +0100 |
| commit | c3081bcbd91a619115f047c2ceea90a9090d5216 (patch) | |
| tree | de4450057f68e4c5b1c2d75446135ff0a068757a /sysdeps/s390/wcpncpy.c | |
| parent | 0966dd86896d7cd6c107c751ba7d3b69542ca11d (diff) | |
| download | glibc-c3081bcbd91a619115f047c2ceea90a9090d5216.tar.gz glibc-c3081bcbd91a619115f047c2ceea90a9090d5216.tar.xz glibc-c3081bcbd91a619115f047c2ceea90a9090d5216.zip | |
S390: Refactor wcpncpy ifunc handling.
The ifunc handling for wcpncpy 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 wcpncpy variants. * sysdeps/s390/Makefile (sysdep_routines): Add wcpncpy variants. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Refactor ifunc handling for wcpncpy. * sysdeps/s390/multiarch/wcpncpy-c.c: Move to ... * sysdeps/s390/wcpncpy-c.c: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wcpncpy-vx.S: Move to ... * sysdeps/s390/wcpncpy-vx.S: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wcpncpy.c: Move to ... * sysdeps/s390/wcpncpy.c: ... here and adjust ifunc handling. * sysdeps/s390/ifunc-wcpncpy.h: New file.
Diffstat (limited to 'sysdeps/s390/wcpncpy.c')
| -rw-r--r-- | sysdeps/s390/wcpncpy.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/sysdeps/s390/wcpncpy.c b/sysdeps/s390/wcpncpy.c new file mode 100644 index 0000000000..08d097dd2c --- /dev/null +++ b/sysdeps/s390/wcpncpy.c @@ -0,0 +1,39 @@ +/* Multiple versions of wcpncpy. + 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-wcpncpy.h> + +#if HAVE_WCPNCPY_IFUNC +# include <wchar.h> +# include <ifunc-resolve.h> + +# if HAVE_WCPNCPY_C +extern __typeof (__wcpncpy) WCPNCPY_C attribute_hidden; +# endif + +# if HAVE_WCPNCPY_Z13 +extern __typeof (__wcpncpy) WCPNCPY_Z13 attribute_hidden; +# endif + +s390_libc_ifunc_expr (__wcpncpy, __wcpncpy, + (HAVE_WCPNCPY_Z13 && (hwcap & HWCAP_S390_VX)) + ? WCPNCPY_Z13 + : WCPNCPY_DEFAULT + ) +weak_alias (__wcpncpy, wcpncpy) +#endif |