/* ffsll.c -- version of ffsll for gold. */
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/* ffsll.c -- version of ffsll for gold. */
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/* Copyright 2009 Free Software Foundation, Inc.
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/* Copyright 2009 Free Software Foundation, Inc.
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Written by Ian Lance Taylor <iant@google.com>.
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Written by Ian Lance Taylor <iant@google.com>.
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This file is part of gold.
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This file is part of gold.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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MA 02110-1301, USA. */
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#include "config.h"
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#include "config.h"
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#include <string.h>
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#include <string.h>
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extern int ffsll (long long);
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extern int ffsll (long long);
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/* This file implements ffsll for systems which don't have it. We use
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/* This file implements ffsll for systems which don't have it. We use
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ffsll if possible because gcc supports it as a builtin which will
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ffsll if possible because gcc supports it as a builtin which will
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use a machine instruction if there is one. */
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use a machine instruction if there is one. */
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int
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int
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ffsll (long long arg)
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ffsll (long long arg)
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{
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{
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unsigned long long i;
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unsigned long long i;
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int ret;
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int ret;
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if (arg == 0)
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if (arg == 0)
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ret = 0;
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ret = 0;
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else
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else
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{
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{
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ret = 1;
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ret = 1;
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for (i = (unsigned long long) arg; (i & 1) == 0; i >>= 1)
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for (i = (unsigned long long) arg; (i & 1) == 0; i >>= 1)
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++ret;
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++ret;
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}
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}
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return ret;
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return ret;
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}
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}
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