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annotate liboctave/lo-ieee.h @ 11117:3cbc0d77db48 ss-3-3-53

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update version info for snapshot
author John W. Eaton <jwe@octave.org>
date Tue, 19 Oct 2010 02:25:32 -0400
parents cbc402e64d83
children 2f36145742c9
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1 /*
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2
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3 Copyright (C) 1996, 1997, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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4 John W. Eaton
1967
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5
4cb6aaa0f2c7 [project @ 1996-02-17 02:54:24 by jwe]
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6 This file is part of Octave.
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7
4cb6aaa0f2c7 [project @ 1996-02-17 02:54:24 by jwe]
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
4cb6aaa0f2c7 [project @ 1996-02-17 02:54:24 by jwe]
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
4cb6aaa0f2c7 [project @ 1996-02-17 02:54:24 by jwe]
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24 #if !defined (octave_liboctave_ieee_h)
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25 #define octave_liboctave_ieee_h 1
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26
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27 #ifdef __cplusplus
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28 extern "C" {
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29 #endif
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30
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31 /* Octave's idea of infinity. */
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32 extern OCTAVE_API double octave_Inf;
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33
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34 /* Octave's idea of a missing value. */
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35 extern OCTAVE_API double octave_NA;
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36
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37 /* Octave's idea of not a number. */
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38 extern OCTAVE_API double octave_NaN;
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39
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40 /* Octave's idea of infinity. */
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41 extern OCTAVE_API float octave_Float_Inf;
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42
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43 /* Octave's idea of a missing value. */
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44 extern OCTAVE_API float octave_Float_NA;
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45
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46 /* Octave's idea of not a number. */
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47 extern OCTAVE_API float octave_Float_NaN;
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48
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49 /* FIXME -- this code assumes that a double has twice the
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50 number of bits as an int */
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51
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52 extern OCTAVE_API int lo_ieee_hw;
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53 extern OCTAVE_API int lo_ieee_lw;
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54
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55 typedef union
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56 {
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57 double value;
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58 unsigned int word[2];
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59 } lo_ieee_double;
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60
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61 typedef union
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62 {
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63 float value;
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64 unsigned int word;
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65 } lo_ieee_float;
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66
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67 #define LO_IEEE_NA_HW_OLD 0x7ff00000
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68 #define LO_IEEE_NA_LW_OLD 1954
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69 #define LO_IEEE_NA_HW 0x7FF840F4
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70 #define LO_IEEE_NA_LW 0x40000000
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71 #define LO_IEEE_NA_FLOAT 0x7FC207A2
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72
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73
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74 extern OCTAVE_API void octave_ieee_init (void);
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76 #if defined (SCO)
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77 extern int __isnan (double);
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78 extern int __isinf (double);
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79 extern int __isnanf (float);
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80 extern int __isinff (float);
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81
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82 #define isnan(x) (sizeof (x) == sizeof (float) ? __isnanf (x) : __isnan (x))
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83 #define isinf(x) (sizeof (x) == sizeof (float) ? __isinff (x) : __isinf (x))
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84 #endif
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85
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86 extern OCTAVE_API int __lo_ieee_isnan (double x);
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87 extern OCTAVE_API int __lo_ieee_finite (double x);
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88 extern OCTAVE_API int __lo_ieee_isinf (double x);
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89
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90 extern OCTAVE_API int __lo_ieee_is_NA (double);
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91 extern OCTAVE_API int __lo_ieee_is_old_NA (double);
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92 extern OCTAVE_API int __lo_ieee_is_NaN_or_NA (double) GCC_ATTR_DEPRECATED;
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93 extern OCTAVE_API double __lo_ieee_replace_old_NA (double);
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94
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95 extern OCTAVE_API double lo_ieee_inf_value (void);
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96 extern OCTAVE_API double lo_ieee_na_value (void);
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97 extern OCTAVE_API double lo_ieee_nan_value (void);
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98
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99 extern OCTAVE_API int __lo_ieee_signbit (double);
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100
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101 extern OCTAVE_API int __lo_ieee_float_isnan (float x);
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102 extern OCTAVE_API int __lo_ieee_float_finite (float x);
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103 extern OCTAVE_API int __lo_ieee_float_isinf (float x);
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104
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105 extern OCTAVE_API int __lo_ieee_float_is_NA (float);
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106 extern OCTAVE_API int __lo_ieee_float_is_NaN_or_NA (float) GCC_ATTR_DEPRECATED;
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107
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108 extern OCTAVE_API float lo_ieee_float_inf_value (void);
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109 extern OCTAVE_API float lo_ieee_float_na_value (void);
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110 extern OCTAVE_API float lo_ieee_float_nan_value (void);
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111
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112 extern OCTAVE_API int __lo_ieee_float_signbit (float);
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113
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114 #ifdef __cplusplus
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115 }
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116 #endif
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117
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118 #define lo_ieee_isnan(x) (sizeof (x) == sizeof (float) ? \
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119 __lo_ieee_float_isnan (x) : __lo_ieee_isnan (x))
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120 #define lo_ieee_finite(x) (sizeof (x) == sizeof (float) ? \
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121 __lo_ieee_float_finite (x) : __lo_ieee_finite (x))
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122 #define lo_ieee_isinf(x) (sizeof (x) == sizeof (float) ? \
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123 __lo_ieee_float_isinf (x) : __lo_ieee_isinf (x))
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124
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125
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126 #define lo_ieee_is_NA(x) (sizeof (x) == sizeof (float) ? \
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127 __lo_ieee_float_is_NA (x) : __lo_ieee_is_NA (x))
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128 #define lo_ieee_is_NaN_or_NA(x) (sizeof (x) == sizeof (float) ? \
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129 __lo_ieee_float_is_NaN_or_NA (x) : __lo_ieee_is_NaN_or_NA (x))
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130 #define lo_ieee_signbit(x) (sizeof (x) == sizeof (float) ? \
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131 __lo_ieee_float_signbit (x) : __lo_ieee_signbit (x))
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132
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133 #endif