/*
 * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_BIT_H__
#define	__XFS_BIT_H__

/*
 * XFS bit manipulation routines.
 */

/*
 * masks with n high/low bits set, 64-bit values
 */
static inline __uint64_t xfs_mask64hi(int n)
{
	return (__uint64_t)-1 << (64 - (n));
}
static inline __uint32_t xfs_mask32lo(int n)
{
	return ((__uint32_t)1 << (n)) - 1;
}
static inline __uint64_t xfs_mask64lo(int n)
{
	return ((__uint64_t)1 << (n)) - 1;
}

/* Get high bit set out of 32-bit argument, -1 if none set */
static inline int xfs_highbit32(__uint32_t v)
{
	return fls(v) - 1;
}

/* Get high bit set out of 64-bit argument, -1 if none set */
static inline int xfs_highbit64(__uint64_t v)
{
	return fls64(v) - 1;
}

/* Get low bit set out of 32-bit argument, -1 if none set */
static inline int xfs_lowbit32(__uint32_t v)
{
	return ffs(v) - 1;
}

/* Get low bit set out of 64-bit argument, -1 if none set */
static inline int xfs_lowbit64(__uint64_t v)
{
	__uint32_t	w = (__uint32_t)v;
	int		n = 0;

	if (w) {	/* lower bits */
		n = ffs(w);
	} else {	/* upper bits */
		w = (__uint32_t)(v >> 32);
		if (w) {
			n = ffs(w);
			if (n)
				n += 32;
		}
	}
	return n - 1;
}

/* Return whether bitmap is empty (1 == empty) */
extern int xfs_bitmap_empty(uint *map, uint size);

/* Count continuous one bits in map starting with start_bit */
extern int xfs_contig_bits(uint *map, uint size, uint start_bit);

/* Find next set bit in map */
extern int xfs_next_bit(uint *map, uint size, uint start_bit);

#endif	/* __XFS_BIT_H__ */
h' value='nds-private-remove'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove'>root</a>/<a href='/cgit.cgi/linux/net-next.git/diff/Documentation?h=nds-private-remove'>Documentation</a>/<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/cpu-freq?h=nds-private-remove'>cpu-freq</a>/<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/cpu-freq/cpu-drivers.txt?h=nds-private-remove'>cpu-drivers.txt</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove'>Diffstat</a> (limited to 'Documentation/cpu-freq/cpu-drivers.txt')</div><table summary='diffstat' class='diffstat'>