newlib/libm/ld/fpmath.h

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
   5  * Copyright (c) 2002 David Schultz <das@FreeBSD.ORG>
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD$
  30  */
  31
  32 #ifndef _FPMATH_H_
  33 #define _FPMATH_H_
  34
  35 #include <sys/endian.h>
  36 #include "machine/_fpmath.h"  /* changed to machine for newlib */
  37
  38 #ifndef _IEEE_WORD_ORDER
  39 #define _IEEE_WORD_ORDER        _BYTE_ORDER
  40 #endif
  41
  42 union IEEEf2bits {
  43         float   f;
  44         struct {
  45 #if _BYTE_ORDER == _LITTLE_ENDIAN
  46                 unsigned int    man     :23;
  47                 unsigned int    exp     :8;
  48                 unsigned int    sign    :1;
  49 #else /* _BIG_ENDIAN */
  50                 unsigned int    sign    :1;
  51                 unsigned int    exp     :8;
  52                 unsigned int    man     :23;
  53 #endif
  54         } bits;
  55 };
  56
  57 #define DBL_MANH_SIZE   20
  58 #define DBL_MANL_SIZE   32
  59
  60 union IEEEd2bits {
  61         double  d;
  62         struct {
  63 #if _BYTE_ORDER == _LITTLE_ENDIAN
  64 #if _IEEE_WORD_ORDER == _LITTLE_ENDIAN
  65                 unsigned int    manl    :32;
  66 #endif
  67                 unsigned int    manh    :20;
  68                 unsigned int    exp     :11;
  69                 unsigned int    sign    :1;
  70 #if _IEEE_WORD_ORDER == _BIG_ENDIAN
  71                 unsigned int    manl    :32;
  72 #endif
  73 #else /* _BIG_ENDIAN */
  74                 unsigned int    sign    :1;
  75                 unsigned int    exp     :11;
  76                 unsigned int    manh    :20;
  77                 unsigned int    manl    :32;
  78 #endif
  79         } bits;
  80 };
  81
  82 #endif /* !_FPMATH_H */