text: /* ffs -- find first set bit in a word, counted from least significant end.
     For IBM rs6000.
     Copyright (C) 1991, 1992 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., 675 Mass Ave,
  Cambridge, MA 02139, USA.  */
  
  #include <ansidecl.h>
  #include <bstring.h>
  
  #undef	ffs
  
  #ifdef	__GNUC__
  
  int
  DEFUN(ffs, (x), int x)
  {
    int cnt;
  
    asm ("cntlz %0,%1" : "=r" (cnt) : "r" (x & -x));
    return 32 - cnt;
  }
  
  #else
  #include <sysdeps/generic/ffs.c>
  #endif
  