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 1.4 2008/12/23 22:20:59 marcel Exp $ 28 */ 29 30 #include <sys/endian.h> 31 #include "_fpmath.h" 32 33 #ifndef _IEEE_WORD_ORDER 34 #define _IEEE_WORD_ORDER _BYTE_ORDER 35 #endif 36 37 union IEEEf2bits { 38 float f; 39 struct { 40 #if _BYTE_ORDER == _LITTLE_ENDIAN 41 unsigned int man :23; 42 unsigned int exp :8; 43 unsigned int sign :1; 44 #else /* _BIG_ENDIAN */ 45 unsigned int sign :1; 46 unsigned int exp :8; 47 unsigned int man :23; 48 #endif 49 } bits; 50 }; 51 52 #define DBL_MANH_SIZE 20 53 #define DBL_MANL_SIZE 32 54 55 union IEEEd2bits { 56 double d; 57 struct { 58 #if _BYTE_ORDER == _LITTLE_ENDIAN 59 #if _IEEE_WORD_ORDER == _LITTLE_ENDIAN 60 unsigned int manl :32; 61 #endif 62 unsigned int manh :20; 63 unsigned int exp :11; 64 unsigned int sign :1; 65 #if _IEEE_WORD_ORDER == _BIG_ENDIAN 66 unsigned int manl :32; 67 #endif 68 #else /* _BIG_ENDIAN */ 69 unsigned int sign :1; 70 unsigned int exp :11; 71 unsigned int manh :20; 72 unsigned int manl :32; 73 #endif 74 } bits; 75 }; 76