1/*-
2 * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
3 * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD$
28 */
29
30#include <sys/endian.h>
31
32union IEEEl2bits {
33	long double	e;
34	struct {
35#if _BYTE_ORDER == _LITTLE_ENDIAN
36		unsigned int	manl	:32;
37		unsigned int	manh	:32;
38		unsigned int	exp	:15;
39		unsigned int	sign	:1;
40		unsigned long	junk	:48;
41#else /* _BIG_ENDIAN */
42		unsigned long	junk	:48;
43		unsigned int	sign	:1;
44		unsigned int	exp	:15;
45		unsigned int	manh	:32;
46		unsigned int	manl	:32;
47#endif
48	} bits;
49	struct {
50#if _BYTE_ORDER == _LITTLE_ENDIAN
51		unsigned long	man	:64;
52		unsigned int	expsign	:16;
53		unsigned long	junk	:48;
54#else /* _BIG_ENDIAN */
55		unsigned long	junk	:48;
56		unsigned int	expsign	:16;
57		unsigned long	man	:64;
58#endif
59	} xbits;
60};
61
62#if _BYTE_ORDER == _LITTLE_ENDIAN
63#define	LDBL_NBIT	0x80000000
64#define	mask_nbit_l(u)	((u).bits.manh &= ~LDBL_NBIT)
65#else /* _BIG_ENDIAN */
66/*
67 * XXX This doesn't look right.  Very few machines have a different
68 *     endianness for integers and floating-point, and in nextafterl()
69 *     we assume that none do.  If you have an environment for testing
70 *     this, please let me know. --das
71 */
72#define	LDBL_NBIT	0x80
73#define	mask_nbit_l(u)	((u).bits.manh &= ~LDBL_NBIT)
74#endif
75
76#define	LDBL_MANH_SIZE	32
77#define	LDBL_MANL_SIZE	32
78
79#define	LDBL_TO_ARRAY32(u, a) do {			\
80	(a)[0] = (uint32_t)(u).bits.manl;		\
81	(a)[1] = (uint32_t)(u).bits.manh;		\
82} while (0)
83