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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-03-05 17:13:48 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-03-12 17:11:01 -0300 |
| commit | 4a76fb1da8b7e7fa472741921f49ef32f81bc0a0 (patch) | |
| tree | 4f05bba26477f0d9330703dd619c7bc93dabf560 /sysdeps/powerpc/powerpc64/multiarch/strcasestr.c | |
| parent | 2149da36836bc32cd66359ca37bab5884af7e81f (diff) | |
| download | glibc-4a76fb1da8b7e7fa472741921f49ef32f81bc0a0.zip glibc-4a76fb1da8b7e7fa472741921f49ef32f81bc0a0.tar.gz glibc-4a76fb1da8b7e7fa472741921f49ef32f81bc0a0.tar.bz2 | |
powerpc: Remove power8 strcasestr optimization
Similar to strstr (1e9a550ba4), power8 strcasestr does not show much
improvement compared to the generic implementation. The geomean
on bench-strcasestr shows:
__strcasestr_power8 __strcasestr_ppc
power10 1159 1120
power9 1640 1469
power8 1787 1904
The strcasestr uses the same 'trick' as power7 strstr to detect
potential quadradic behavior, which only adds overheads for input
that trigger quadradic behavior and it is really a hack.
Checked on powerpc64le-linux-gnu.
Reviewed-by: DJ Delorie <dj@redhat.com>
Diffstat (limited to 'sysdeps/powerpc/powerpc64/multiarch/strcasestr.c')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/multiarch/strcasestr.c | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strcasestr.c b/sysdeps/powerpc/powerpc64/multiarch/strcasestr.c deleted file mode 100644 index d2bda3f..0000000 --- a/sysdeps/powerpc/powerpc64/multiarch/strcasestr.c +++ /dev/null @@ -1,38 +0,0 @@ -/* Multiple versions of strcasestr. - Copyright (C) 2016-2024 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 - <https://www.gnu.org/licenses/>. */ - -#if IS_IN (libc) -# include <string.h> -# include <shlib-compat.h> -# include "init-arch.h" - -extern __typeof (__strcasestr) __strcasestr_ppc attribute_hidden; -extern __typeof (__strcasestr) __strcasestr_power8 attribute_hidden; - -/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle - ifunc symbol properly. */ -libc_ifunc (__strcasestr, - (hwcap2 & PPC_FEATURE2_ARCH_2_07 - && hwcap & PPC_FEATURE_HAS_ALTIVEC) - ? __strcasestr_power8 - : __strcasestr_ppc); - -weak_alias (__strcasestr, strcasestr) -#else -#include <string/strcasestr.c> -#endif |