_fpmath.h revision 331722 
1/*-
2 * Copyright (c) 2003 David Schultz <das@FreeBSD.ORG>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/11/lib/libc/powerpc/_fpmath.h 331722 2018-03-29 02:50:57Z eadler $
27 */
28
29union IEEEl2bits {
30	long double	e;
31	struct {
32#if _BYTE_ORDER == _LITTLE_ENDIAN
33		unsigned int	manl	:32;
34		unsigned int	manh	:20;
35		unsigned int	exp	:11;
36		unsigned int	sign	:1;
37#else	/* _BYTE_ORDER == _LITTLE_ENDIAN */
38		unsigned int		sign	:1;
39		unsigned int		exp	:11;
40		unsigned int		manh	:20;
41		unsigned int		manl	:32;
42#endif
43	} bits;
44};
45
46#define	mask_nbit_l(u)	((void)0)
47#define	LDBL_IMPLICIT_NBIT
48#define	LDBL_NBIT	0
49
50#define	LDBL_MANH_SIZE	20
51#define	LDBL_MANL_SIZE	32
52
53#define	LDBL_TO_ARRAY32(u, a) do {			\
54	(a)[0] = (uint32_t)(u).bits.manl;		\
55	(a)[1] = (uint32_t)(u).bits.manh;		\
56} while(0)
57