mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 21:10:07 +00:00
52cf11004e
Implemented:
wcscat-avx2 (+ 744 bytes
wcscpy-avx2 (+ 539 bytes)
wcpcpy-avx2 (+ 577 bytes)
wcsncpy-avx2 (+1108 bytes)
wcpncpy-avx2 (+1214 bytes)
wcsncat-avx2 (+1085 bytes)
Performance Changes:
Times are from N = 10 runs of the benchmark suite and are reported
as geometric mean of all ratios of New Implementation / Best Old
Implementation. Best Old Implementation was determined with the
highest ISA implementation.
wcscat-avx2 -> 0.975
wcscpy-avx2 -> 0.591
wcpcpy-avx2 -> 0.698
wcsncpy-avx2 -> 0.730
wcpncpy-avx2 -> 0.711
wcsncat-avx2 -> 0.954
Code Size Changes:
This change increase the size of libc.so by ~5.5kb bytes. For
reference the patch optimizing the normal strcpy family functions
decreases libc.so by ~5.2kb.
Full check passes on x86-64 and build succeeds for all ISA levels w/
and w/o multiarch.
42 lines
1.5 KiB
ArmAsm
42 lines
1.5 KiB
ArmAsm
/* ISA level static dispatch for wcscat .S files.
|
|
Copyright (C) 2022 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/>. */
|
|
|
|
/* wcscat non-multiarch build is split into two files,
|
|
wcscat-generic.c and wcscat.S. The wcscat-generic.c build is
|
|
for ISA level <= 1 and just uses multiarch/wcscat-generic.c.
|
|
This must be split into two files because we cannot include C
|
|
code from assembly or vice versa. */
|
|
|
|
#include <isa-level.h>
|
|
|
|
#if MINIMUM_X86_ISA_LEVEL >= 3
|
|
|
|
# define WCSCAT __wcscat
|
|
|
|
# define DEFAULT_IMPL_V4 "multiarch/wcscat-evex.S"
|
|
# define DEFAULT_IMPL_V3 "multiarch/wcscat-avx2.S"
|
|
/* isa-default-impl.h expects DEFAULT_IMPL_V1 to be defined but it
|
|
should never be used from here. */
|
|
# define DEFAULT_IMPL_V1 "ERROR -- Invalid ISA IMPL"
|
|
|
|
# include "isa-default-impl.h"
|
|
|
|
weak_alias (__wcscat, wcscat)
|
|
libc_hidden_def (__wcscat)
|
|
#endif
|