1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org> 5 * Copyright (c) 2002 David Schultz <das@FreeBSD.ORG> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #include <sys/endian.h> 33 #include "_fpmath.h" 34 35 #ifndef _IEEE_WORD_ORDER 36 #define _IEEE_WORD_ORDER _BYTE_ORDER 37 #endif 38 39 union IEEEf2bits { 40 float f; 41 struct { 42 #if _BYTE_ORDER == _LITTLE_ENDIAN 43 unsigned int man :23; 44 unsigned int exp :8; 45 unsigned int sign :1; 46 #else /* _BIG_ENDIAN */ 47 unsigned int sign :1; 48 unsigned int exp :8; 49 unsigned int man :23; 50 #endif 51 } bits; 52 }; 53 54 #define DBL_MANH_SIZE 20 55 #define DBL_MANL_SIZE 32 56 57 union IEEEd2bits { 58 double d; 59 struct { 60 #if _BYTE_ORDER == _LITTLE_ENDIAN 61 #if _IEEE_WORD_ORDER == _LITTLE_ENDIAN 62 unsigned int manl :32; 63 #endif 64 unsigned int manh :20; 65 unsigned int exp :11; 66 unsigned int sign :1; 67 #if _IEEE_WORD_ORDER == _BIG_ENDIAN 68 unsigned int manl :32; 69 #endif 70 #else /* _BIG_ENDIAN */ 71 unsigned int sign :1; 72 unsigned int exp :11; 73 unsigned int manh :20; 74 unsigned int manl :32; 75 #endif 76 } bits; 77 }; 78