1 /* Copyright (C) 1991, 1992, 1997, 1998 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Torbjorn Granlund (tege@sics.se).
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19 #include <limits.h>
20 #include <string.h>
21
22 /* Find the first bit set in I. */
ffsll(long long int i)23 int ffsll (long long int i)
24 {
25 unsigned long long int x = i & -i;
26
27 if (x <= 0xffffffff)
28 return ffs (i);
29 else
30 return 32 + ffs (i >> 32);
31 }
32
33 #if ULONG_MAX != UINT_MAX
34 strong_alias_untyped(ffsll, ffsl)
35 #endif
36