mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 09:30:06 +00:00
2b778ceb40
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/* ffs -- find first set bit in a word, counted from least significant end.
|
|
For Intel 80x86, x>=3.
|
|
This file is part of the GNU C Library.
|
|
Copyright (C) 1991-2021 Free Software Foundation, Inc.
|
|
Contributed by Torbjorn Granlund (tege@sics.se).
|
|
|
|
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 ffsl __something_else
|
|
#include <string.h>
|
|
|
|
#undef ffs
|
|
|
|
#ifdef __GNUC__
|
|
|
|
int
|
|
__ffs (int x)
|
|
{
|
|
int cnt;
|
|
int tmp;
|
|
|
|
asm ("xorl %0,%0\n" /* Set CNT to zero. */
|
|
"bsfl %2,%1\n" /* Count low bits in X and store in %1. */
|
|
"jz 1f\n" /* Jump if OK, i.e. X was non-zero. */
|
|
"leal 1(%1),%0\n" /* Return bsfl-result plus one on %0. */
|
|
"1:" : "=&a" (cnt), "=r" (tmp) : "rm" (x));
|
|
|
|
return cnt;
|
|
}
|
|
weak_alias (__ffs, ffs)
|
|
libc_hidden_def (__ffs)
|
|
libc_hidden_builtin_def (ffs)
|
|
#undef ffsl
|
|
weak_alias (__ffs, ffsl)
|
|
|
|
#else
|
|
#include <string/ffs.c>
|
|
#endif
|