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| author | Stefan Liebler <stli@linux.ibm.com> | 2018-12-18 13:57:17 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2018-12-18 13:57:17 +0100 |
| commit | 2e02d0b7a9bf3421638d2d0f2526275a1df5c0da (patch) | |
| tree | 88c02093fb6a962263e75eab11a31a8265ef40b6 /sysdeps/s390/wcslen.c | |
| parent | 89bfcbdf9d3d36eff0d544f655991149a7ae680b (diff) | |
| download | glibc-2e02d0b7a9bf3421638d2d0f2526275a1df5c0da.tar.gz | |
S390: Refactor wcslen ifunc handling.
The ifunc handling for wcslen 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 wcslen variants.
* sysdeps/s390/Makefile (sysdep_routines): Add wcslen variants.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Refactor ifunc handling for wcslen.
* sysdeps/s390/multiarch/wcslen-c.c: Move to ...
* sysdeps/s390/wcslen-c.c: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wcslen-vx.S: Move to ...
* sysdeps/s390/wcslen-vx.S: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wcslen.c: Move to ...
* sysdeps/s390/wcslen.c: ... here and adjust ifunc handling.
* sysdeps/s390/ifunc-wcslen.h: New file.
Diffstat (limited to 'sysdeps/s390/wcslen.c')
| -rw-r--r-- | sysdeps/s390/wcslen.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/sysdeps/s390/wcslen.c b/sysdeps/s390/wcslen.c new file mode 100644 index 0000000000..a5eee83f6c --- /dev/null +++ b/sysdeps/s390/wcslen.c @@ -0,0 +1,39 @@ +/* Multiple versions of wcslen. + 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-wcslen.h> + +#if HAVE_WCSLEN_IFUNC +# include <wchar.h> +# include <ifunc-resolve.h> + +# if HAVE_WCSLEN_C +extern __typeof (__wcslen) WCSLEN_C attribute_hidden; +# endif + +# if HAVE_WCSLEN_Z13 +extern __typeof (__wcslen) WCSLEN_Z13 attribute_hidden; +# endif + +s390_libc_ifunc_expr (__wcslen, __wcslen, + (HAVE_WCSLEN_Z13 && (hwcap & HWCAP_S390_VX)) + ? WCSLEN_Z13 + : WCSLEN_DEFAULT + ) +weak_alias (__wcslen, wcslen) +#endif |