Merge branch 'vendor/GCC50'
[dragonfly.git] / contrib / binutils-2.24 / gold / ffsll.c
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f40e693d
JM
1/* ffsll.c -- version of ffsll for gold. */
2
3/* Copyright 2009 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor <iant@google.com>.
5
6 This file is part of gold.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23#include "config.h"
24
25#include <string.h>
26
27extern int ffsll (long long);
28
29/* This file implements ffsll for systems which don't have it. We use
30 ffsll if possible because gcc supports it as a builtin which will
31 use a machine instruction if there is one. */
32
33int
34ffsll (long long arg)
35{
36 unsigned long long i;
37 int ret;
38
39 if (arg == 0)
40 ret = 0;
41 else
42 {
43 ret = 1;
44 for (i = (unsigned long long) arg; (i & 1) == 0; i >>= 1)
45 ++ret;
46 }
47 return ret;
48}