1/*	$OpenBSD: ieee.h,v 1.4 2011/11/08 17:06:51 deraadt Exp $	*/
2/*	$NetBSD: ieee.h,v 1.2 2001/02/21 17:43:50 bjh21 Exp $	*/
3
4/*
5 * Copyright (c) 1992, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This software was developed by the Computer Systems Engineering group
9 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
10 * contributed to Berkeley.
11 *
12 * All advertising materials mentioning features or use of this software
13 * must display the following acknowledgement:
14 *	This product includes software developed by the University of
15 *	California, Lawrence Berkeley Laboratory.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
19 * are met:
20 * 1. Redistributions of source code must retain the above copyright
21 *    notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 *    notice, this list of conditions and the following disclaimer in the
24 *    documentation and/or other materials provided with the distribution.
25 * 3. All advertising materials mentioning features or use of this software
26 *    must display the following acknowledgement:
27 *	This product includes software developed by the University of
28 *	California, Berkeley and its contributors.
29 * 4. Neither the name of the University nor the names of its contributors
30 *    may be used to endorse or promote products derived from this software
31 *    without specific prior written permission.
32 *
33 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
34 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
35 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
36 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
37 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
38 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
39 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
41 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
42 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 * SUCH DAMAGE.
44 *
45 *	@(#)ieee.h	8.1 (Berkeley) 6/11/93
46 */
47
48#ifndef _MACHINE_IEEE_H_
49#define _MACHINE_IEEE_H_
50
51#include <sys/types.h>
52
53__BEGIN_DECLS
54
55#define SNG_EXPBITS	8
56#define SNG_FRACBITS	23
57
58#define SNG_EXP_INFNAN	255
59#define SNG_EXP_BIAS	127
60
61struct ieee_single {
62  unsigned sng_frac:23;
63  unsigned sng_exp:8;
64  unsigned sng_sign:1;
65};
66
67#define DBL_EXPBITS	11
68#define DBL_FRACHBITS	20
69#define DBL_FRACLBITS	32
70#define DBL_FRACBITS	52
71
72#define DBL_EXP_INFNAN	2047
73#define DBL_EXP_BIAS	1023
74
75struct ieee_double {
76  unsigned dbl_fracl;
77  unsigned dbl_frach:20;
78  unsigned dbl_exp:11;
79  unsigned dbl_sign:1;
80};
81
82#if __LP64__
83
84/* 64-bit Android uses ld128 long doubles. */
85
86#define EXT_EXPBITS	15
87#define EXT_FRACHBITS	16
88#define EXT_FRACHMBITS	32
89#define EXT_FRACLMBITS	32
90#define EXT_FRACLBITS	32
91#define EXT_FRACBITS	112
92
93#define EXT_EXP_INFNAN	32767
94#define EXT_EXP_BIAS	16383
95
96#define EXT_IMPLICIT_NBIT
97
98#define EXT_TO_ARRAY32(p, a) do { \
99  (a)[0] = (uint32_t)(p)->ext_fracl; \
100  (a)[1] = (uint32_t)(p)->ext_fraclm; \
101  (a)[2] = (uint32_t)(p)->ext_frachm; \
102  (a)[3] = (uint32_t)(p)->ext_frach; \
103} while(0)
104
105struct ieee_ext {
106  unsigned ext_fracl;
107  unsigned ext_fraclm;
108  unsigned ext_frachm;
109  unsigned ext_frach:16;
110  unsigned ext_exp:15;
111  unsigned ext_sign:1;
112};
113
114#endif
115
116__END_DECLS
117
118#endif /* _MACHINE_IEEE_H_ */
119