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/* 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;
}
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