mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
9c38deec96
These functions all have optimized versions: __strncat_sse2_unaligned, __strncpy_sse2_unaligned, and stpncpy_sse2_unaligned which are faster than their respective generic implementations. Since the sse2 versions can run on baseline x86_64, we should use these as the baseline implementation and can remove the generic implementations. Geometric mean of N=20 runs of the entire benchmark suite on: 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz (Tigerlake) __strncat_sse2_unaligned / __strncat_generic: .944 __strncpy_sse2_unaligned / __strncpy_generic: .726 __stpncpy_sse2_unaligned / __stpncpy_generic: .650 Tested build with and without multiarch and full check with multiarch.
39 lines
1.4 KiB
C
39 lines
1.4 KiB
C
/* Multiple versions of stpncpy.
|
|
All versions must be listed in ifunc-impl-list.c.
|
|
Copyright (C) 2017-2022 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/>. */
|
|
|
|
/* Define multiple versions only for the definition in libc. */
|
|
#if IS_IN (libc)
|
|
# define stpncpy __redirect_stpncpy
|
|
# define __stpncpy __redirect___stpncpy
|
|
# include <string.h>
|
|
# undef stpncpy
|
|
# undef __stpncpy
|
|
|
|
# define SYMBOL_NAME stpncpy
|
|
# include "ifunc-strncpy.h"
|
|
|
|
libc_ifunc_redirected (__redirect_stpncpy, __stpncpy, IFUNC_SELECTOR ());
|
|
|
|
weak_alias (__stpncpy, stpncpy)
|
|
# ifdef SHARED
|
|
__hidden_ver1 (__stpncpy, __GI___stpncpy, __redirect___stpncpy)
|
|
__attribute__ ((visibility ("hidden")));
|
|
# endif
|
|
#endif
|