1*baa35082Smrg /* $NetBSD: ffs.c,v 1.4 2011/08/07 01:52:47 mrg Exp $ */
237c9f0a6Schristos
337c9f0a6Schristos /*-
437c9f0a6Schristos * Copyright (c) 1990, 1993
537c9f0a6Schristos * The Regents of the University of California. All rights reserved.
637c9f0a6Schristos *
737c9f0a6Schristos * Redistribution and use in source and binary forms, with or without
837c9f0a6Schristos * modification, are permitted provided that the following conditions
937c9f0a6Schristos * are met:
1037c9f0a6Schristos * 1. Redistributions of source code must retain the above copyright
1137c9f0a6Schristos * notice, this list of conditions and the following disclaimer.
1237c9f0a6Schristos * 2. Redistributions in binary form must reproduce the above copyright
1337c9f0a6Schristos * notice, this list of conditions and the following disclaimer in the
1437c9f0a6Schristos * documentation and/or other materials provided with the distribution.
1537c9f0a6Schristos * 3. Neither the name of the University nor the names of its contributors
1637c9f0a6Schristos * may be used to endorse or promote products derived from this software
1737c9f0a6Schristos * without specific prior written permission.
1837c9f0a6Schristos *
1937c9f0a6Schristos * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2037c9f0a6Schristos * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2137c9f0a6Schristos * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2237c9f0a6Schristos * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2337c9f0a6Schristos * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2437c9f0a6Schristos * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2537c9f0a6Schristos * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2637c9f0a6Schristos * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2737c9f0a6Schristos * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2837c9f0a6Schristos * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2937c9f0a6Schristos * SUCH DAMAGE.
3037c9f0a6Schristos */
3137c9f0a6Schristos
3237c9f0a6Schristos #include <sys/cdefs.h>
3337c9f0a6Schristos #if defined(LIBC_SCCS) && !defined(lint)
3437c9f0a6Schristos #if 0
3537c9f0a6Schristos static char sccsid[] = "@(#)ffs.c 8.1 (Berkeley) 6/4/93";
3637c9f0a6Schristos #else
37*baa35082Smrg __RCSID("$NetBSD: ffs.c,v 1.4 2011/08/07 01:52:47 mrg Exp $");
3837c9f0a6Schristos #endif
3937c9f0a6Schristos #endif /* LIBC_SCCS and not lint */
4037c9f0a6Schristos
412f1af368Schristos #include <sys/types.h>
422f1af368Schristos #include <sys/bitops.h>
432f1af368Schristos
4437c9f0a6Schristos #if !defined(_KERNEL) && !defined(_STANDALONE)
4537c9f0a6Schristos #include <string.h>
4637c9f0a6Schristos #else
4737c9f0a6Schristos #include <lib/libkern/libkern.h>
4837c9f0a6Schristos #endif
4937c9f0a6Schristos
5037c9f0a6Schristos /* #undef ffs() - might be defined as macro to __builtin_ffs() */
5137c9f0a6Schristos #undef ffs
5237c9f0a6Schristos
5337c9f0a6Schristos /*
5437c9f0a6Schristos * ffs -- vax ffs instruction
5537c9f0a6Schristos */
__weak_alias(__ffssi2,ffs)56*baa35082Smrg __weak_alias(__ffssi2,ffs)
5737c9f0a6Schristos int
58a8565cf9Schristos ffs(int mask)
5937c9f0a6Schristos {
602f1af368Schristos return ffs32((uint32_t)mask);
6137c9f0a6Schristos }
62