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This patch removes the power6 wcschr optimization and uses generic
implementation instead. Currently, both power6 and power7 IFUNC variant
resulting binary are essentially the same and the generic implementation
with unrolling loop set to 8 also results in similar performance.
Checked on powerpc64-linux-gnu.
* sysdeps/powerpc/Makefile [$(subdir) == wcsmbs] (CFLAGS-wcschr.c):
New rule.
* sysdeps/powerpc/power6/wcschr.c: Remove file.
* sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-power6.c:
Likewise.
* sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-power7.c:
Likewise.
* sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-ppc32.c:
Likewise.
* sysdeps/powerpc/powerpc32/power4/multiarch/wcschr.c: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/wcschr-power6.c: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/wcschr-power7.c: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/wcschr-ppc64.c: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/wcschr.c: Likewise.
* sysdeps/powerpc/powerpc64/power6/wcschr.c: Likewise.
* sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
[$(subdir) == wcsmbs] (sysdeps_routines): Remove wcschr-power6 and
wcschr-power7.
(CFLAGS-wcschr-power7.c, CFLAGS-wcschr-power6.c): Remove rule.
* sysdeps/powerpc/powerpc64/multiarch/Makefile: Likewise.
* sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c:
Remove wcschr optimizations.
* sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c: Likewise.
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* All files with FSF copyright notices: Update copyright dates
using scripts/update-copyrights.
* locale/programs/charmap-kw.h: Regenerated.
* locale/programs/locfile-kw.h: Likewise.
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* All files with FSF copyright notices: Update copyright dates
using scripts/update-copyrights.
* locale/programs/charmap-kw.h: Regenerated.
* locale/programs/locfile-kw.h: Likewise.
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Use of strftime, a C90 function, ends up bringing in wcschr, which is
not a C90 function. Although not a conformance bug (C90 reserves
wcs*), this is still contrary to glibc practice of avoiding relying on
those reservations; this patch arranges for the internal uses to use
__wcschr instead, with wcschr being a weak alias. This is more
complicated than some such patches because of the various IFUNC
definitions of wcschr (which include code redefining libc_hidden_def
in a way that involves creating __GI_wcschr manually and so also needs
to create __GI___wcschr after the change of internal uses to use
__wcschr).
Tested for x86_64 and 32-bit x86 (testsuite, and that disassembly of
installed shared libraries is unchanged by the patch).
2014-12-10 Joseph Myers <joseph@codesourcery.com>
Adhemerval Zanella <azanella@linux.vnet.ibm.com>
[BZ #17634]
* wcsmbs/wcschr.c [!WCSCHR] (wcschr): Define as __wcschr.
Undefine after defining function. Define as weak alias of
__wcschr. Use libc_hidden_weak.
* include/wchar.h (__wcschr): Declare. Use libc_hidden_proto.
* sysdeps/i386/i686/multiarch/wcschr-c.c [IS_IN (libc) && SHARED]
(libc_hidden_def): Also define __GI___wcschr alias.
* sysdeps/i386/i686/multiarch/wcschr.S (wcschr): Rename to
__wcschr and define as weak alias of __wcschr.
* sysdeps/powerpc/power6/wcschr.c [!WCSCHR] (WCSCHR): Define as
__wcschr.
[!WCSCHR] (DEFAULT_WCSCHR): Define.
[DEFAULT_WCSCHR] (__wcschr): Use libc_hidden_def.
[DEFAULT_WCSCHR] (wcschr): Define as weak alias of __wcschr. Use
libc_hidden_weak. Do not use libc_hidden_def.
* sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-ppc32.c
[IS_IN (libc) && SHARED] (libc_hidden_def): Also define
__GI___wcschr alias.
* sysdeps/powerpc/powerpc32/power4/multiarch/wcschr.c
[IS_IN (libc)] (wcschr): Define as macro expanding to
__redirect_wcschr.
[IS_IN (libc)] (__wcschr_ppc): Use __redirect_wcschr in typeof.
[IS_IN (libc)] (__wcschr_power6): Likewise.
[IS_IN (libc)] (__wcschr_power7): Likewise.
[IS_IN (libc)] (__libc_wcschr): New. Define with libc_ifunc
instead of wcschr.
[IS_IN (libc)] (wcschr): Undefine and define as weak alias of
__libc_wcschr.
[!IS_IN (libc)] (libc_hidden_def): Do not undefine and redefine.
* sysdeps/powerpc/powerpc64/multiarch/wcschr.c (wcschr): Rename to
__wcschr and define as weak alias of __wcschr. Use
libc_hidden_builtin_def.
* sysdeps/x86_64/wcschr.S (wcschr): Rename to __wcschr and define
as weak alias of __wcschr. Use libc_hidden_weak.
* time/alt_digit.c (_nl_get_walt_digit): Use __wcschr instead of
wcschr.
* time/era.c (_nl_init_era_entries): Likewise.
* conform/Makefile (test-xfail-ISO/time.h/linknamespace): Remove
variable.
(test-xfail-XPG3/time.h/linknamespace): Likewise.
(test-xfail-XPG4/time.h/linknamespace): Likewise.
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