Date: Sun, 10 Jan 2010 19:44:08 +0000 (UTC) From: Warner Losh <imp@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r202030 - head/sys/mips/include Message-ID: <201001101944.o0AJi8Q1022039@svn.freebsd.org>
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Author: imp Date: Sun Jan 10 19:44:08 2010 New Revision: 202030 URL: http://svn.freebsd.org/changeset/base/202030 Log: Merge from projects/mips to head by hand: Merge in rmi's fls64 code... Added: - copied unchanged from r202029, projects/mips/sys/mips/include/fls64.h Directory Properties: head/sys/mips/include/fls64.h (props changed) Copied: head/sys/mips/include/fls64.h (from r202029, projects/mips/sys/mips/include/fls64.h) ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/mips/include/fls64.h Sun Jan 10 19:44:08 2010 (r202030, copy of r202029, projects/mips/sys/mips/include/fls64.h) @@ -0,0 +1,47 @@ +/*- + * Copyright (c) 2003-2009 RMI Corporation + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of RMI Corporation, nor the names of its contributors, + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * RMI_BSD */ +#ifndef _MIPS_FLS64_H_ +#define _MIPS_FLS64_H_ + +/* + * Find Last Set bit (64 bit) + */ +static inline int +fls64(__uint64_t mask) +{ + int bit; + + if (mask == 0) + return (0); + for (bit = 1; ((mask & 0x1ULL) == 0); bit++) + mask = mask >> 1; + return (bit); +} +#endif
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