1/*	$NetBSD: vaxfp.h,v 1.7 2008/04/28 20:23:39 martin Exp $	*/
2
3/*-
4 * Copyright (c) 2003 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Klaus Klein.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * vaxfp.h defines the layout of VAX Floating-Point data types.
34 * Only F_floating and D_floating types are defined here;
35 * G_floating and H_floating are not supported by NetBSD.
36 */
37#ifndef _VAX_VAXFP_H_
38#define	_VAX_VAXFP_H_
39
40#include <sys/featuretest.h>
41
42#if defined(_NETBSD_SOURCE) || defined(_ISOC99_SOURCE)
43
44typedef int fenv_t;
45typedef int fexcept_t;
46
47#define	FE_UNDERFLOW	0x01	/* underflow exception */
48
49#define	FE_ALL_EXCEPT	0x01
50
51#if !defined(_ISOC99_SOURCE)
52
53#define	FFLT_EXPBITS	8
54#define	FFLT_FRACHBITS	7
55#define	FFLT_FRACLBITS	16
56#define	FFLT_FRACBITS	(FFLT_FRACLBITS + FFLT_FRACHBITS)
57
58struct vax_f_floating {
59	unsigned int	fflt_frach:FFLT_FRACHBITS;
60	unsigned int	fflt_exp:FFLT_EXPBITS;
61	unsigned int	fflt_sign:1;
62	unsigned int	fflt_fracl:FFLT_FRACLBITS;
63};
64
65#define	DFLT_EXPBITS	8
66#define	DFLT_FRACHBITS	7
67#define	DFLT_FRACMBITS	16
68#define	DFLT_FRACLBITS	32
69#define	DFLT_FRACBITS	(DFLT_FRACLBITS + DFLT_FRACMBITS + DFLT_FRACHBITS)
70
71struct vax_d_floating {
72
73	unsigned int	dflt_frach:DFLT_FRACHBITS;
74	unsigned int	dflt_exp:DFLT_EXPBITS;
75	unsigned int	dflt_sign:1;
76	unsigned int	dflt_fracm:DFLT_FRACMBITS;
77	unsigned int	dflt_fracl:DFLT_FRACLBITS;
78};
79
80/*
81 * Exponent biases.
82 */
83#define	FFLT_EXP_BIAS	128
84#define	DFLT_EXP_BIAS	128
85
86/*
87 * Convenience data structures.
88 */
89union vax_ffloating_u {
90	float			ffltu_f;
91	struct vax_f_floating	ffltu_fflt;
92};
93
94union vax_dfloating_u {
95	double			dfltu_d;
96	struct vax_d_floating	dfltu_dflt;
97};
98
99#endif /* !_ISOC99_SOURCE */
100
101#endif /* _NETBSD_SOURCE || _ISOC99_SOURCE */
102
103#endif /* _VAX_VAXFP_H_ */
104