Subversion Repositories openrisc

/* ffsll.c -- version of ffsll for gold.  */

/* Copyright 2009 Free Software Foundation, Inc.

   Written by Ian Lance Taylor <iant@google.com>.

   This file is part of gold.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,

   MA 02110-1301, USA.  */

#include "config.h"

#include <string.h>

extern int ffsll (long long);

/* This file implements ffsll for systems which don't have it.  We use

   ffsll if possible because gcc supports it as a builtin which will

   use a machine instruction if there is one.  */

int

ffsll (long long arg)

{

  unsigned long long i;

  int ret;

  if (arg == 0)

    ret = 0;

  else

    {

      ret = 1;

      for (i = (unsigned long long) arg; (i & 1) == 0; i >>= 1)

        ++ret;

    }

  return ret;

}