mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-17 02:20:10 +00:00
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/* ffs -- find first set bit in a word, counted from least significant end.
|
|
For i960 Core architecture
|
|
Copyright (C) 1994 Free Software Foundation, Inc.
|
|
Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil),
|
|
On-Line Applications Research Corporation.
|
|
|
|
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., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <ansidecl.h>
|
|
#include <string.h>
|
|
|
|
#undef ffs
|
|
|
|
#if defined (__GNUC__) && defined (__i960__)
|
|
|
|
int
|
|
DEFUN(ffs, (x), int x)
|
|
{
|
|
int cnt;
|
|
|
|
asm("scanbit %1,%0" : "=d" (cnt) : "rm" (x & -x));
|
|
|
|
return cnt;
|
|
}
|
|
|
|
#else
|
|
|
|
#include <sysdeps/generic/ffs.c>
|
|
|
|
#endif
|