xref: /minix3/lib/libc/arch/vax/gen/isfinited.c (revision 2fe8fb192fe7e8720e3e7a77f928da545e872a6a)
1*2fe8fb19SBen Gras /*	$NetBSD: isfinited.c,v 1.5 2008/04/28 20:22:57 martin Exp $	*/
2*2fe8fb19SBen Gras 
3*2fe8fb19SBen Gras /*-
4*2fe8fb19SBen Gras  * Copyright (c) 2003 The NetBSD Foundation, Inc.
5*2fe8fb19SBen Gras  * All rights reserved.
6*2fe8fb19SBen Gras  *
7*2fe8fb19SBen Gras  * This code is derived from software contributed to The NetBSD Foundation
8*2fe8fb19SBen Gras  * by Klaus Klein.
9*2fe8fb19SBen Gras  *
10*2fe8fb19SBen Gras  * Redistribution and use in source and binary forms, with or without
11*2fe8fb19SBen Gras  * modification, are permitted provided that the following conditions
12*2fe8fb19SBen Gras  * are met:
13*2fe8fb19SBen Gras  * 1. Redistributions of source code must retain the above copyright
14*2fe8fb19SBen Gras  *    notice, this list of conditions and the following disclaimer.
15*2fe8fb19SBen Gras  * 2. Redistributions in binary form must reproduce the above copyright
16*2fe8fb19SBen Gras  *    notice, this list of conditions and the following disclaimer in the
17*2fe8fb19SBen Gras  *    documentation and/or other materials provided with the distribution.
18*2fe8fb19SBen Gras  *
19*2fe8fb19SBen Gras  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20*2fe8fb19SBen Gras  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21*2fe8fb19SBen Gras  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22*2fe8fb19SBen Gras  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23*2fe8fb19SBen Gras  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24*2fe8fb19SBen Gras  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25*2fe8fb19SBen Gras  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26*2fe8fb19SBen Gras  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27*2fe8fb19SBen Gras  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28*2fe8fb19SBen Gras  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29*2fe8fb19SBen Gras  * POSSIBILITY OF SUCH DAMAGE.
30*2fe8fb19SBen Gras  */
31*2fe8fb19SBen Gras 
32*2fe8fb19SBen Gras #include <sys/cdefs.h>
33*2fe8fb19SBen Gras #if defined(LIBC_SCCS) && !defined(lint)
34*2fe8fb19SBen Gras __RCSID("$NetBSD: isfinited.c,v 1.5 2008/04/28 20:22:57 martin Exp $");
35*2fe8fb19SBen Gras #endif
36*2fe8fb19SBen Gras 
37*2fe8fb19SBen Gras #include <machine/vaxfp.h>
38*2fe8fb19SBen Gras #include <math.h>
39*2fe8fb19SBen Gras 
40*2fe8fb19SBen Gras /*
41*2fe8fb19SBen Gras  * 7.12.3.2 isfinite - determine whether an argument has finite value
42*2fe8fb19SBen Gras  *          VAX D_floating version
43*2fe8fb19SBen Gras  */
44*2fe8fb19SBen Gras int
__isfinited(double x)45*2fe8fb19SBen Gras __isfinited(double x)
46*2fe8fb19SBen Gras {
47*2fe8fb19SBen Gras 	union vax_dfloating_u u;
48*2fe8fb19SBen Gras 
49*2fe8fb19SBen Gras 	u.dfltu_d = x;
50*2fe8fb19SBen Gras 
51*2fe8fb19SBen Gras 	if (u.dfltu_dflt.dflt_exp == 0 &&
52*2fe8fb19SBen Gras 	    ((u.dfltu_dflt.dflt_frach != 0 ||
53*2fe8fb19SBen Gras 	      u.dfltu_dflt.dflt_fracm != 0 ||
54*2fe8fb19SBen Gras 	      u.dfltu_dflt.dflt_fracl != 0) ||
55*2fe8fb19SBen Gras 	     (u.dfltu_dflt.dflt_sign != 0)))
56*2fe8fb19SBen Gras 		return 0;
57*2fe8fb19SBen Gras 
58*2fe8fb19SBen Gras 	return 1;
59*2fe8fb19SBen Gras }
60