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Encumbrance review done.
Add copyright and license words consistent with GPL.
Refer to http://fsg.melbourne.sgi.com/reviews/ for details.

There is a slight change in the license terms and conditions words
to go with the copyrights, so most of the files are not getting
new GPL's, just updated versions ... but there are 20-30 more files
here as well.

/*
 * Copyright (C) 1999 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; either version 2 of the License, or (at
 * your option) any later version.
 * 
 * This program is distributed in the hope that it will 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., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 */
#ifndef _FS_XFS_BIT_H
#define	_FS_XFS_BIT_H

#ident "$Revision: 1.4 $"

/*
 * XFS bit manipulation routines.
 */

/*
 * masks with n high/low bits set, 32-bit values & 64-bit values
 */
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_MASK32HI)
__uint32_t xfs_mask32hi(int n);
#define	XFS_MASK32HI(n)		xfs_mask32hi(n)
#else
#define	XFS_MASK32HI(n)		((__uint32_t)-1 << (32 - (n)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_MASK64HI)
__uint64_t xfs_mask64hi(int n);
#define	XFS_MASK64HI(n)		xfs_mask64hi(n)
#else
#define	XFS_MASK64HI(n)		((__uint64_t)-1 << (64 - (n)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_MASK32LO)
__uint32_t xfs_mask32lo(int n);
#define	XFS_MASK32LO(n)		xfs_mask32lo(n)
#else
#define	XFS_MASK32LO(n)		(((__uint32_t)1 << (n)) - 1)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_MASK64LO)
__uint64_t xfs_mask64lo(int n);
#define	XFS_MASK64LO(n)		xfs_mask64lo(n)
#else
#define	XFS_MASK64LO(n)		(((__uint64_t)1 << (n)) - 1)
#endif

/*
 * Index of low bit number in byte, -1 for none set, 0..7 otherwise.
 */
extern const char xfs_lowbit[256];

/*
 * Index of high bit number in byte, -1 for none set, 0..7 otherwise.
 */
extern const char xfs_highbit[256];

/*
 * Count of bits set in byte, 0..8.
 */
extern const char xfs_countbit[256];

/*
 * xfs_lowbit32: get low bit set out of 32-bit argument, -1 if none set.
 */
extern int xfs_lowbit32(__uint32_t v);

/*
 * xfs_highbit32: get high bit set out of 32-bit argument, -1 if none set.
 */
extern int xfs_highbit32(__uint32_t v);

/*
 * xfs_lowbit64: get low bit set out of 64-bit argument, -1 if none set.
 */
extern int xfs_lowbit64(__uint64_t v);

/*
 * xfs_highbit64: get high bit set out of 64-bit argument, -1 if none set.
 */
extern int xfs_highbit64(__uint64_t);

#endif	/* _FS_XFS_BIT_H */