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  1. /*
  2.  * Copyright (C) 2005 Josef Cejka
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #ifndef __SFTYPES_H__
  30. #define __SFTYPES_H__
  31.  
  32.  
  33. typedef union {
  34.     float f;
  35.     struct  {
  36.         #ifdef __BIG_ENDIAN__
  37.         __u32 sign:1;
  38.         __u32 exp:8;
  39.         __u32 mantisa:23;
  40.         #elif defined __LITTLE_ENDIAN__
  41.         __u32 mantisa:23;
  42.         __u32 exp:8;
  43.         __u32 sign:1;
  44.         #else
  45.         #error "Unknown endians."
  46.         #endif
  47.         } parts __attribute__ ((packed));
  48.     } float32;
  49.    
  50. typedef union {
  51.     double d;
  52.     struct  {
  53.         #ifdef __BIG_ENDIAN__
  54.         __u64 sign:1;
  55.         __u64 exp:11;
  56.         __u64 mantisa:52;
  57.         #elif defined __LITTLE_ENDIAN__
  58.         __u64 mantisa:52;
  59.         __u64 exp:11;
  60.         __u64 sign:1;
  61.         #else
  62.         #error "Unknown endians."
  63.         #endif
  64.         } parts __attribute__ ((packed));
  65.     } float64;
  66.  
  67. #define FLOAT32_MAX 0x7f800000
  68. #define FLOAT32_MIN 0xff800000
  69. #define FLOAT64_MAX
  70. #define FLOAT64_MIN
  71.  
  72. #define FLOAT32_BIAS 0xF7
  73. #define FLOAT64_BIAS 0x3FF
  74. #define FLOAT80_BIAS 0x3FFF
  75.  
  76.  
  77. #endif
  78.  
  79.