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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2022-07-05 17:06:41 -0700 |
|---|---|---|
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | 2022-07-12 11:44:12 -0700 |
| commit | 9c38deec96ebe1b052a0c1bef137b90967755f18 (patch) | |
| tree | ae940cf21e7ecbef92e0028f10b7c0dc5a6400c6 /sysdeps/x86_64/multiarch/strncpy-generic.c | |
| parent | c5bec9d491c5d066dd238ccafcdec78cd4592e8e (diff) | |
| download | glibc-9c38deec96ebe1b052a0c1bef137b90967755f18.tar.gz glibc-9c38deec96ebe1b052a0c1bef137b90967755f18.tar.xz glibc-9c38deec96ebe1b052a0c1bef137b90967755f18.zip | |
x86: Remove generic strncat, strncpy, and stpncpy implementations
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.
Diffstat (limited to 'sysdeps/x86_64/multiarch/strncpy-generic.c')
| -rw-r--r-- | sysdeps/x86_64/multiarch/strncpy-generic.c | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/sysdeps/x86_64/multiarch/strncpy-generic.c b/sysdeps/x86_64/multiarch/strncpy-generic.c deleted file mode 100644 index 9916153dd5..0000000000 --- a/sysdeps/x86_64/multiarch/strncpy-generic.c +++ /dev/null @@ -1,24 +0,0 @@ -/* strncpy. - 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/>. */ - - -#define STRNCPY __strncpy_generic -#undef libc_hidden_builtin_def -#define libc_hidden_builtin_def(strncpy) - -#include <string/strncpy.c> |