mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-27 03:41:23 +08:00
cdb47f096a
1998-08-09 22:32 Ulrich Drepper <drepper@cygnus.com> * sysdeps/powerpc/ffs.c: Fix typo. Add support for ffsl. Patch by Matt McLean <keys@yikes.com>.
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/* Find first set bit in a word, counted from least significant end.
|
|
For PowerPC.
|
|
Copyright (C) 1991, 1992, 1997, 1998 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#define ffsl __something_else
|
|
#include <string.h>
|
|
|
|
#undef ffs
|
|
|
|
#ifdef __GNUC__
|
|
|
|
int
|
|
__ffs (int x)
|
|
{
|
|
int cnt;
|
|
|
|
asm ("cntlzw %0,%1" : "=r" (cnt) : "r" (x & -x));
|
|
return 32 - cnt;
|
|
}
|
|
weak_alias (__ffs, ffs)
|
|
#undef ffsl
|
|
weak_alias (__ffs, ffsl)
|
|
|
|
#else
|
|
#include <sysdeps/generic/ffs.c>
|
|
#endif
|