18cf5ed51SMike Barcroft /*- 2*d915a14eSPedro F. Giffuni * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3*d915a14eSPedro F. Giffuni * 48cf5ed51SMike Barcroft * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org> 5f154b03bSDavid Schultz * Copyright (c) 2002 David Schultz <das@FreeBSD.ORG> 68cf5ed51SMike Barcroft * All rights reserved. 78cf5ed51SMike Barcroft * 88cf5ed51SMike Barcroft * Redistribution and use in source and binary forms, with or without 98cf5ed51SMike Barcroft * modification, are permitted provided that the following conditions 108cf5ed51SMike Barcroft * are met: 118cf5ed51SMike Barcroft * 1. Redistributions of source code must retain the above copyright 128cf5ed51SMike Barcroft * notice, this list of conditions and the following disclaimer. 138cf5ed51SMike Barcroft * 2. Redistributions in binary form must reproduce the above copyright 148cf5ed51SMike Barcroft * notice, this list of conditions and the following disclaimer in the 158cf5ed51SMike Barcroft * documentation and/or other materials provided with the distribution. 168cf5ed51SMike Barcroft * 178cf5ed51SMike Barcroft * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 188cf5ed51SMike Barcroft * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 198cf5ed51SMike Barcroft * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 208cf5ed51SMike Barcroft * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 218cf5ed51SMike Barcroft * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 228cf5ed51SMike Barcroft * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 238cf5ed51SMike Barcroft * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 248cf5ed51SMike Barcroft * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 258cf5ed51SMike Barcroft * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 268cf5ed51SMike Barcroft * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 278cf5ed51SMike Barcroft * SUCH DAMAGE. 288cf5ed51SMike Barcroft * 298cf5ed51SMike Barcroft * $FreeBSD$ 308cf5ed51SMike Barcroft */ 318cf5ed51SMike Barcroft 328cf5ed51SMike Barcroft #include <sys/endian.h> 338cf5ed51SMike Barcroft #include "_fpmath.h" 348cf5ed51SMike Barcroft 3574aed985SMarcel Moolenaar #ifndef _IEEE_WORD_ORDER 3674aed985SMarcel Moolenaar #define _IEEE_WORD_ORDER _BYTE_ORDER 3774aed985SMarcel Moolenaar #endif 3874aed985SMarcel Moolenaar 398cf5ed51SMike Barcroft union IEEEf2bits { 408cf5ed51SMike Barcroft float f; 418cf5ed51SMike Barcroft struct { 428cf5ed51SMike Barcroft #if _BYTE_ORDER == _LITTLE_ENDIAN 438cf5ed51SMike Barcroft unsigned int man :23; 448cf5ed51SMike Barcroft unsigned int exp :8; 458cf5ed51SMike Barcroft unsigned int sign :1; 468cf5ed51SMike Barcroft #else /* _BIG_ENDIAN */ 478cf5ed51SMike Barcroft unsigned int sign :1; 488cf5ed51SMike Barcroft unsigned int exp :8; 498cf5ed51SMike Barcroft unsigned int man :23; 508cf5ed51SMike Barcroft #endif 518cf5ed51SMike Barcroft } bits; 528cf5ed51SMike Barcroft }; 538cf5ed51SMike Barcroft 542ad26506SDavid Schultz #define DBL_MANH_SIZE 20 552ad26506SDavid Schultz #define DBL_MANL_SIZE 32 562ad26506SDavid Schultz 578cf5ed51SMike Barcroft union IEEEd2bits { 588cf5ed51SMike Barcroft double d; 598cf5ed51SMike Barcroft struct { 608cf5ed51SMike Barcroft #if _BYTE_ORDER == _LITTLE_ENDIAN 6174aed985SMarcel Moolenaar #if _IEEE_WORD_ORDER == _LITTLE_ENDIAN 628cf5ed51SMike Barcroft unsigned int manl :32; 6374aed985SMarcel Moolenaar #endif 648cf5ed51SMike Barcroft unsigned int manh :20; 658cf5ed51SMike Barcroft unsigned int exp :11; 668cf5ed51SMike Barcroft unsigned int sign :1; 6774aed985SMarcel Moolenaar #if _IEEE_WORD_ORDER == _BIG_ENDIAN 6874aed985SMarcel Moolenaar unsigned int manl :32; 6974aed985SMarcel Moolenaar #endif 708cf5ed51SMike Barcroft #else /* _BIG_ENDIAN */ 718cf5ed51SMike Barcroft unsigned int sign :1; 728cf5ed51SMike Barcroft unsigned int exp :11; 738cf5ed51SMike Barcroft unsigned int manh :20; 748cf5ed51SMike Barcroft unsigned int manl :32; 758cf5ed51SMike Barcroft #endif 768cf5ed51SMike Barcroft } bits; 778cf5ed51SMike Barcroft }; 78