1 /* Find first set bit in a word, counted from least significant end.
2 For PowerPC.
3 Copyright (C) 1991-2022 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20 #define ffsl __something_else
21 #include <limits.h>
22 #include <string.h>
23
24 #undef ffs
25
26 int
__ffsll(long long int x)27 __ffsll (long long int x)
28 {
29 int cnt;
30
31 asm ("cntlzd %0,%1" : "=r" (cnt) : "r" (x & -x));
32 return 64 - cnt;
33 }
34 weak_alias (__ffsll, ffsll)
35 #undef ffsl
36 weak_alias (__ffsll, ffsl)
37