1 /*-
2 * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
3 * Copyright (c) 2002 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: src/lib/libc/include/fpmath.h,v 1.3 2005/02/06 03:23:31 das Exp $
28 */
30 #include <endian.h>
31 #include "_fpmath.h"
33 union IEEEf2bits {
34 float f;
35 struct {
36 #if __BYTE_ORDER == __LITTLE_ENDIAN
37 unsigned int man :23;
38 unsigned int exp :8;
39 unsigned int sign :1;
40 #else /* _BIG_ENDIAN */
41 unsigned int sign :1;
42 unsigned int exp :8;
43 unsigned int man :23;
44 #endif
45 } bits;
46 };
48 #define DBL_MANH_SIZE 20
49 #define DBL_MANL_SIZE 32
51 union IEEEd2bits {
52 double d;
53 struct {
54 /* #ifdef __ARMEB__ */
55 #if (__BYTE_ORDER == __BIG_ENDIAN) || (defined(__arm__) && !defined(__VFP_FP__))
56 unsigned int manh :20;
57 unsigned int exp :11;
58 unsigned int sign :1;
59 unsigned int manl :32;
60 #elif __BYTE_ORDER == __LITTLE_ENDIAN
61 unsigned int manl :32;
62 unsigned int manh :20;
63 unsigned int exp :11;
64 unsigned int sign :1;
65 #elif __BYTE_ORDER == __BIG_ENDIAN
66 unsigned int sign :1;
67 unsigned int exp :11;
68 unsigned int manh :20;
69 unsigned int manl :32;
70 #endif
71 } bits;
72 };