fbsdcompat/fpmath.h

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*-
  26  * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
  27  * Copyright (c) 2002 David Schultz <dschultz@uclink.Berkeley.EDU>
  28  * All rights reserved.
  29  *
  30  * Redistribution and use in source and binary forms, with or without
  31  * modification, are permitted provided that the following conditions
  32  * are met:
  33  * 1. Redistributions of source code must retain the above copyright
  34  *    notice, this list of conditions and the following disclaimer.
  35  * 2. Redistributions in binary form must reproduce the above copyright
  36  *    notice, this list of conditions and the following disclaimer in the
  37  *    documentation and/or other materials provided with the distribution.
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  40  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  42  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  43  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  44  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  45  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  46  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  47  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  48  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  49  * SUCH DAMAGE.
  50  *
  51  * $FreeBSD: /repoman/r/ncvs/src/lib/libc/include/fpmath.h,v 1.1 2003/02/08 20:37:53 mike Exp $
  52  */
  53
  54 #include <sys/endian.h>
  55 #include "_fpmath.h"
  56
  57 union IEEEf2bits {
  58         float   f;
  59         struct {
  60 #if _BYTE_ORDER == _LITTLE_ENDIAN
  61                 unsigned int    man     :23;
  62                 unsigned int    exp     :8;
  63                 unsigned int    sign    :1;
  64 #else /* _BIG_ENDIAN */
  65                 unsigned int    sign    :1;
  66                 unsigned int    exp     :8;
  67                 unsigned int    man     :23;
  68 #endif
  69         } bits;
  70 };
  71
  72 union IEEEd2bits {
  73         double  d;
  74         struct {
  75 #if _BYTE_ORDER == _LITTLE_ENDIAN
  76                 unsigned int    manl    :32;
  77                 unsigned int    manh    :20;
  78                 unsigned int    exp     :11;
  79                 unsigned int    sign    :1;
  80 #else /* _BIG_ENDIAN */
  81                 unsigned int    sign    :1;
  82                 unsigned int    exp     :11;
  83                 unsigned int    manh    :20;
  84                 unsigned int    manl    :32;
  85 #endif
  86         } bits;
  87 };