_fpmath.h revision 111555 
1/*-
2 * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
3 * Copyright (c) 2002, 2003 David Schultz <dschultz@uclink.Berkeley.EDU>
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: head/lib/libc/ia64/_fpmath.h 111555 2003-02-26 16:04:34Z mike $
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};
50
51#if _BYTE_ORDER == _LITTLE_ENDIAN
52#define	mask_nbit_l(u)	((u).bits.manh &= 0x7fffffff)
53#else /* _BIG_ENDIAN */
54#define	mask_nbit_l(u)	((u).bits.manh &= 0xffffff7f)
55#endif
56