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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 | c62534ae524111eae48b2c2adf3f9a2ca90824f5 (patch) | |
| tree | da07e010bcc14752b47a8b438daf39b502faf3a9 /sysdeps/s390/wmemchr.c | |
| parent | 79b44cf61115bd48006227bb325b709f294c56f9 (diff) | |
| download | glibc-c62534ae524111eae48b2c2adf3f9a2ca90824f5.tar.gz glibc-c62534ae524111eae48b2c2adf3f9a2ca90824f5.tar.xz glibc-c62534ae524111eae48b2c2adf3f9a2ca90824f5.zip | |
S390: Refactor wmemchr ifunc handling.
The ifunc handling for wmemchr 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 wmemchr variants. * sysdeps/s390/Makefile (sysdep_routines): Add wmemchr variants. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Refactor ifunc handling for wmemchr. * sysdeps/s390/multiarch/wmemchr-c.c: Move to ... * sysdeps/s390/wmemchr-c.c: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wmemchr-vx.S: Move to ... * sysdeps/s390/wmemchr-vx.S: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/wmemchr.c: Move to ... * sysdeps/s390/wmemchr.c: ... here and adjust ifunc handling. * sysdeps/s390/ifunc-wmemchr.h: New file.
Diffstat (limited to 'sysdeps/s390/wmemchr.c')
| -rw-r--r-- | sysdeps/s390/wmemchr.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/sysdeps/s390/wmemchr.c b/sysdeps/s390/wmemchr.c new file mode 100644 index 0000000000..0d2fbb22c6 --- /dev/null +++ b/sysdeps/s390/wmemchr.c @@ -0,0 +1,43 @@ +/* Multiple versions of wmemchr. + 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-wmemchr.h> + +#if HAVE_WMEMCHR_IFUNC +# define wmemchr __redirect_wmemchr +# define __wmemchr __redirect___wmemchr +# include <wchar.h> +# undef wmemchr +# undef __wmemchr +# include <ifunc-resolve.h> + +# if HAVE_WMEMCHR_C +extern __typeof (__redirect___wmemchr) WMEMCHR_C attribute_hidden; +# endif + +# if HAVE_WMEMCHR_Z13 +extern __typeof (__redirect___wmemchr) WMEMCHR_Z13 attribute_hidden; +# endif + +s390_libc_ifunc_expr (__redirect___wmemchr, __wmemchr, + (HAVE_WMEMCHR_Z13 && (hwcap & HWCAP_S390_VX)) + ? WMEMCHR_Z13 + : WMEMCHR_DEFAULT + ) +weak_alias (__wmemchr, wmemchr) +#endif |