1*86d7f5d3SJohn Marino /*- 2*86d7f5d3SJohn Marino * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org> 3*86d7f5d3SJohn Marino * Copyright (c) 2002 David Schultz <das@FreeBSD.ORG> 4*86d7f5d3SJohn Marino * All rights reserved. 5*86d7f5d3SJohn Marino * 6*86d7f5d3SJohn Marino * Redistribution and use in source and binary forms, with or without 7*86d7f5d3SJohn Marino * modification, are permitted provided that the following conditions 8*86d7f5d3SJohn Marino * are met: 9*86d7f5d3SJohn Marino * 1. Redistributions of source code must retain the above copyright 10*86d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer. 11*86d7f5d3SJohn Marino * 2. Redistributions in binary form must reproduce the above copyright 12*86d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer in the 13*86d7f5d3SJohn Marino * documentation and/or other materials provided with the distribution. 14*86d7f5d3SJohn Marino * 15*86d7f5d3SJohn Marino * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16*86d7f5d3SJohn Marino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17*86d7f5d3SJohn Marino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18*86d7f5d3SJohn Marino * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19*86d7f5d3SJohn Marino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20*86d7f5d3SJohn Marino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21*86d7f5d3SJohn Marino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22*86d7f5d3SJohn Marino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23*86d7f5d3SJohn Marino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24*86d7f5d3SJohn Marino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25*86d7f5d3SJohn Marino * SUCH DAMAGE. 26*86d7f5d3SJohn Marino * 27*86d7f5d3SJohn Marino * $FreeBSD: src/lib/libc/include/fpmath.h,v 1.4 2008/12/23 22:20:59 marcel Exp $ 28*86d7f5d3SJohn Marino */ 29*86d7f5d3SJohn Marino 30*86d7f5d3SJohn Marino #include <sys/endian.h> 31*86d7f5d3SJohn Marino #include "_fpmath.h" 32*86d7f5d3SJohn Marino 33*86d7f5d3SJohn Marino #ifndef _IEEE_WORD_ORDER 34*86d7f5d3SJohn Marino #define _IEEE_WORD_ORDER _BYTE_ORDER 35*86d7f5d3SJohn Marino #endif 36*86d7f5d3SJohn Marino 37*86d7f5d3SJohn Marino union IEEEf2bits { 38*86d7f5d3SJohn Marino float f; 39*86d7f5d3SJohn Marino struct { 40*86d7f5d3SJohn Marino #if _BYTE_ORDER == _LITTLE_ENDIAN 41*86d7f5d3SJohn Marino unsigned int man :23; 42*86d7f5d3SJohn Marino unsigned int exp :8; 43*86d7f5d3SJohn Marino unsigned int sign :1; 44*86d7f5d3SJohn Marino #else /* _BIG_ENDIAN */ 45*86d7f5d3SJohn Marino unsigned int sign :1; 46*86d7f5d3SJohn Marino unsigned int exp :8; 47*86d7f5d3SJohn Marino unsigned int man :23; 48*86d7f5d3SJohn Marino #endif 49*86d7f5d3SJohn Marino } bits; 50*86d7f5d3SJohn Marino }; 51*86d7f5d3SJohn Marino 52*86d7f5d3SJohn Marino #define DBL_MANH_SIZE 20 53*86d7f5d3SJohn Marino #define DBL_MANL_SIZE 32 54*86d7f5d3SJohn Marino 55*86d7f5d3SJohn Marino union IEEEd2bits { 56*86d7f5d3SJohn Marino double d; 57*86d7f5d3SJohn Marino struct { 58*86d7f5d3SJohn Marino #if _BYTE_ORDER == _LITTLE_ENDIAN 59*86d7f5d3SJohn Marino #if _IEEE_WORD_ORDER == _LITTLE_ENDIAN 60*86d7f5d3SJohn Marino unsigned int manl :32; 61*86d7f5d3SJohn Marino #endif 62*86d7f5d3SJohn Marino unsigned int manh :20; 63*86d7f5d3SJohn Marino unsigned int exp :11; 64*86d7f5d3SJohn Marino unsigned int sign :1; 65*86d7f5d3SJohn Marino #if _IEEE_WORD_ORDER == _BIG_ENDIAN 66*86d7f5d3SJohn Marino unsigned int manl :32; 67*86d7f5d3SJohn Marino #endif 68*86d7f5d3SJohn Marino #else /* _BIG_ENDIAN */ 69*86d7f5d3SJohn Marino unsigned int sign :1; 70*86d7f5d3SJohn Marino unsigned int exp :11; 71*86d7f5d3SJohn Marino unsigned int manh :20; 72*86d7f5d3SJohn Marino unsigned int manl :32; 73*86d7f5d3SJohn Marino #endif 74*86d7f5d3SJohn Marino } bits; 75*86d7f5d3SJohn Marino }; 76