fbsdcompat/fpmath.h

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