1*b6cbf720SGianluca Guida /* $NetBSD: ffs.c,v 1.3 2007/11/02 21:05:06 christos Exp $ */ 2*b6cbf720SGianluca Guida 3*b6cbf720SGianluca Guida /*- 4*b6cbf720SGianluca Guida * Copyright (c) 1990, 1993 5*b6cbf720SGianluca Guida * The Regents of the University of California. All rights reserved. 6*b6cbf720SGianluca Guida * 7*b6cbf720SGianluca Guida * Redistribution and use in source and binary forms, with or without 8*b6cbf720SGianluca Guida * modification, are permitted provided that the following conditions 9*b6cbf720SGianluca Guida * are met: 10*b6cbf720SGianluca Guida * 1. Redistributions of source code must retain the above copyright 11*b6cbf720SGianluca Guida * notice, this list of conditions and the following disclaimer. 12*b6cbf720SGianluca Guida * 2. Redistributions in binary form must reproduce the above copyright 13*b6cbf720SGianluca Guida * notice, this list of conditions and the following disclaimer in the 14*b6cbf720SGianluca Guida * documentation and/or other materials provided with the distribution. 15*b6cbf720SGianluca Guida * 3. Neither the name of the University nor the names of its contributors 16*b6cbf720SGianluca Guida * may be used to endorse or promote products derived from this software 17*b6cbf720SGianluca Guida * without specific prior written permission. 18*b6cbf720SGianluca Guida * 19*b6cbf720SGianluca Guida * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20*b6cbf720SGianluca Guida * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21*b6cbf720SGianluca Guida * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22*b6cbf720SGianluca Guida * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23*b6cbf720SGianluca Guida * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24*b6cbf720SGianluca Guida * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25*b6cbf720SGianluca Guida * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26*b6cbf720SGianluca Guida * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27*b6cbf720SGianluca Guida * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28*b6cbf720SGianluca Guida * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29*b6cbf720SGianluca Guida * SUCH DAMAGE. 30*b6cbf720SGianluca Guida */ 31*b6cbf720SGianluca Guida 32*b6cbf720SGianluca Guida #include <sys/cdefs.h> 33*b6cbf720SGianluca Guida #if defined(LIBC_SCCS) && !defined(lint) 34*b6cbf720SGianluca Guida #if 0 35*b6cbf720SGianluca Guida static char sccsid[] = "@(#)ffs.c 8.1 (Berkeley) 6/4/93"; 36*b6cbf720SGianluca Guida #else 37*b6cbf720SGianluca Guida __RCSID("$NetBSD: ffs.c,v 1.3 2007/11/02 21:05:06 christos Exp $"); 38*b6cbf720SGianluca Guida #endif 39*b6cbf720SGianluca Guida #endif /* LIBC_SCCS and not lint */ 40*b6cbf720SGianluca Guida 41*b6cbf720SGianluca Guida #include <sys/types.h> 42*b6cbf720SGianluca Guida #include <sys/bitops.h> 43*b6cbf720SGianluca Guida 44*b6cbf720SGianluca Guida #if !defined(_KERNEL) && !defined(_STANDALONE) 45*b6cbf720SGianluca Guida #include <string.h> 46*b6cbf720SGianluca Guida #else 47*b6cbf720SGianluca Guida #include <lib/libkern/libkern.h> 48*b6cbf720SGianluca Guida #endif 49*b6cbf720SGianluca Guida 50*b6cbf720SGianluca Guida /* #undef ffs() - might be defined as macro to __builtin_ffs() */ 51*b6cbf720SGianluca Guida #undef ffs 52*b6cbf720SGianluca Guida 53*b6cbf720SGianluca Guida /* 54*b6cbf720SGianluca Guida * ffs -- vax ffs instruction 55*b6cbf720SGianluca Guida */ 56*b6cbf720SGianluca Guida int 57*b6cbf720SGianluca Guida ffs(int mask) 58*b6cbf720SGianluca Guida { 59*b6cbf720SGianluca Guida return ffs32((uint32_t)mask); 60*b6cbf720SGianluca Guida } 61