vax/gen/isfinited.c

1.5.8.2  martin /*	$NetBSD: isfinited.c,v 1.5.8.2 2008/04/28 20:22:58 martin Exp $	*/
1.5.8.2  martin
1.5.8.2  martin /*-
1.5.8.2  martin  * Copyright (c) 2003 The NetBSD Foundation, Inc.
1.5.8.2  martin  * All rights reserved.
1.5.8.2  martin  *
1.5.8.2  martin  * This code is derived from software contributed to The NetBSD Foundation
1.5.8.2  martin  * by Klaus Klein.
1.5.8.2  martin  *
1.5.8.2  martin  * Redistribution and use in source and binary forms, with or without
1.5.8.2  martin  * modification, are permitted provided that the following conditions
1.5.8.2  martin  * are met:
1.5.8.2  martin  * 1. Redistributions of source code must retain the above copyright
1.5.8.2  martin  *    notice, this list of conditions and the following disclaimer.
1.5.8.2  martin  * 2. Redistributions in binary form must reproduce the above copyright
1.5.8.2  martin  *    notice, this list of conditions and the following disclaimer in the
1.5.8.2  martin  *    documentation and/or other materials provided with the distribution.
1.5.8.2  martin  *
1.5.8.2  martin  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
1.5.8.2  martin  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
1.5.8.2  martin  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.5.8.2  martin  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
1.5.8.2  martin  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.5.8.2  martin  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.5.8.2  martin  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1.5.8.2  martin  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1.5.8.2  martin  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.5.8.2  martin  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1.5.8.2  martin  * POSSIBILITY OF SUCH DAMAGE.
1.5.8.2  martin  */
1.5.8.2  martin
1.5.8.2  martin #include <sys/cdefs.h>
1.5.8.2  martin #if defined(LIBC_SCCS) && !defined(lint)
1.5.8.2  martin __RCSID("$NetBSD: isfinited.c,v 1.5.8.2 2008/04/28 20:22:58 martin Exp $");
1.5.8.2  martin #endif
1.5.8.2  martin
1.5.8.2  martin #include <machine/vaxfp.h>
1.5.8.2  martin #include <math.h>
1.5.8.2  martin
1.5.8.2  martin /*
1.5.8.2  martin  * 7.12.3.2 isfinite - determine whether an argument has finite value
1.5.8.2  martin  *          VAX D_floating version
1.5.8.2  martin  */
1.5.8.2  martin int
1.5.8.2  martin __isfinited(double x)
1.5.8.2  martin {
1.5.8.2  martin 	union vax_dfloating_u u;
1.5.8.2  martin
1.5.8.2  martin 	u.dfltu_d = x;
1.5.8.2  martin
1.5.8.2  martin 	if (u.dfltu_dflt.dflt_exp == 0 &&
1.5.8.2  martin 	    ((u.dfltu_dflt.dflt_frach != 0 ||
1.5.8.2  martin 	      u.dfltu_dflt.dflt_fracm != 0 ||
1.5.8.2  martin 	      u.dfltu_dflt.dflt_fracl != 0) ||
1.5.8.2  martin 	     (u.dfltu_dflt.dflt_sign != 0)))
1.5.8.2  martin 		return 0;
1.5.8.2  martin
1.5.8.2  martin 	return 1;
1.5.8.2  martin }