mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 21:40:12 +00:00
38 lines
1.2 KiB
C
38 lines
1.2 KiB
C
/* Find first set bit in a word, counted from least significant end.
|
|
For PowerPC.
|
|
Copyright (C) 1991-2017 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#define ffsl __something_else
|
|
#include <limits.h>
|
|
#include <string.h>
|
|
|
|
#undef ffs
|
|
|
|
int
|
|
__ffsll (long long int x)
|
|
{
|
|
int cnt;
|
|
|
|
asm ("cntlzd %0,%1" : "=r" (cnt) : "r" (x & -x));
|
|
return 64 - cnt;
|
|
}
|
|
weak_alias (__ffsll, ffsll)
|
|
#undef ffsl
|
|
weak_alias (__ffsll, ffsl)
|