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[glibc/history.git] / sysdeps / powerpc / powerpc64 / ffsll.c
blob3a0018955e3c9b77bf07e62b0dfb0cc8615c4114
1 /* Find first set bit in a word, counted from least significant end.
2 For PowerPC.
3 Copyright (C) 1991, 1992, 1997, 1998, 2004 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5 Contributed by Torbjorn Granlund (tege@sics.se).
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, write to the Free
19 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 02111-1307 USA. */
22 #define ffsl __something_else
23 #include <limits.h>
24 #include <string.h>
26 #undef ffs
28 int
29 __ffsll (long long int x)
31 int cnt;
33 asm ("cntlzd %0,%1" : "=r" (cnt) : "r" (x & -x));
34 return 64 - cnt;
36 weak_alias (__ffsll, ffsll)
37 #undef ffsl
38 weak_alias (__ffsll, ffsl)