annotate packages/language/c/libm/current/src/mathincl/fdlibm.h @ 64:c38311975d4f ecos-sw-2000-01-28

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1 #ifndef CYGONCE_LIBM_MATHINCL_FDLIBM_H
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2 #define CYGONCE_LIBM_MATHINCL_FDLIBM_H
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3 //===========================================================================
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4 //
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5 // fdlibm.h
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6 //
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7 // Internal definitions for math library implementation based on fdlibm
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8 //
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9 //===========================================================================
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10 //####COPYRIGHTBEGIN####
64
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11 //
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12 // -------------------------------------------
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13 // The contents of this file are subject to the Red Hat eCos Public License
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14 // Version 1.0 (the "License"); you may not use this file except in
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15 // compliance with the License. You may obtain a copy of the License at
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16 // http://sourceware.cygnus.com/ecos
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17 //
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18 // Software distributed under the License is distributed on an
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19 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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20 // License for the specific language governing rights and limitations under
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21 // the License.
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22 //
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23 // The Original Code is eCos - Embedded Configurable Operating System,
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24 // released September 30, 1998.
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25 //
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26 // The Initial Developer of the Original Code is Red Hat.
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27 // Portions created by Red Hat are
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28 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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29 // All Rights Reserved.
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30 // -------------------------------------------
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31 //
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32 //####COPYRIGHTEND####
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33 //===========================================================================
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34 //#####DESCRIPTIONBEGIN####
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35 //
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36 // Author(s): jlarmour
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37 // Contributors: jlarmour
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38 // Date: 1999-02-09
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39 // Purpose:
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40 // Description: Internal implementation-specific header for math library
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41 // based on fdlibm
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42 // Usage: From within this package, #include "mathincl/fdlibm.h"
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43 //
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44 //####DESCRIPTIONEND####
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45 //
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46 //===========================================================================
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47
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48 // CONFIGURATION
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49
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50 #include <pkgconf/libm.h> // Configuration header
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51
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52 // Include the Math library?
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53 #ifdef CYGPKG_LIBM
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54
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55 // INCLUDES
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56
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57 #include <cyg/infra/cyg_type.h> // Common type definitions and support
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58 #include <math.h> // Main header for math library
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59 #include <float.h> // Properties of FP representation on this
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60 // platform
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61
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62 // SANITY CHECKS
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63
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64 // Just check that we support IEEE-style 64-bit doubles. If not, this
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65 // math library will not work
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66 // This check will go away when support for single-precision alternatives are
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67 // provided
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68
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69 #if DBL_MAX_EXP != 1024
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70 # error IEEE-style 64-bit doubles are required to use the math library
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71 #endif // if DBL_MAX_EXP == 1024
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72
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73
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74 // MACRO DEFINITIONS
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75
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76 #define CYG_LIBM_HI(__x) (((Cyg_libm_ieee_double_shape_type *)&__x)->parts.msw)
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77 #define CYG_LIBM_LO(__x) (((Cyg_libm_ieee_double_shape_type *)&__x)->parts.lsw)
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78 #define CYG_LIBM_HIp(__x) (((Cyg_libm_ieee_double_shape_type *)__x)->parts.msw)
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79 #define CYG_LIBM_LOp(__x) (((Cyg_libm_ieee_double_shape_type *)__x)->parts.lsw)
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80
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81
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82 // REPLACEMENTS FOR STUFF FROM MATH.H DUE TO CONFIG OPTION
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83
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84 #ifdef CYGSYM_LIBM_NO_XOPEN_SVID_NAMESPACE_POLLUTION
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85
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86 #define HUGE FLT_MAX // from float.h
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87 #define DOMAIN 1
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88 #define SING 2
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89 #define OVERFLOW 3
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90 #define UNDERFLOW 4
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91 #define TLOSS 5
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92 #define PLOSS 6
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93
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94 struct exception {
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95 int type; // One of DOMAIN, SING, OVERFLOW, UNDERFLOW, TLOSS, PLOSS
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96 char *name; // Name of the function generating the exception
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97 double arg1; // First argument to the function
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98 double arg2; // Second argument to the function
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99 double retval; // Value to be returned - can be altered by matherr()
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100 };
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101
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102 externC int
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103 matherr( struct exception * ); // User-overridable error handling - see
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104 // <pkgconf/libm.h> for a discussion
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105 #endif // ifdef CYGSYM_LIBM_NO_XOPEN_SVID_NAMESPACE_POLLUTION
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106
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107
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108 // FUNCTION PROTOTYPES
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109
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110 // IEEE-754 style elementary functions */
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111
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112 externC double
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113 __ieee754_sqrt( double );
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114
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115 externC double
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116 __ieee754_acos( double );
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117
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118
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119 externC double
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120 __ieee754_log( double );
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121
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122
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123 externC double
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124 __ieee754_asin( double );
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125
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126 externC double
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127 __ieee754_atan2( double, double );
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128
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129 externC double
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130 __ieee754_exp( double );
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131
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132 externC double
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133 __ieee754_cosh( double );
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134
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135 externC double
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136 __ieee754_fmod( double, double );
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137
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138 externC double
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139 __ieee754_pow( double, double );
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140
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141
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142 externC double
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143 __ieee754_log10( double );
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144
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145 externC double
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146 __ieee754_sinh( double );
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147
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148
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149 externC int
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150 __ieee754_rem_pio2( double, double * );
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151
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152 #ifdef CYGFUN_LIBM_SVID3_scalb
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153 externC double
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154 __ieee754_scalb( double, double );
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155 #else
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156 externC double
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157 __ieee754_scalb( double, int );
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158 #endif
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159
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160 // FDLIBM kernel functions
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161
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162 externC double
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163 __kernel_standard( double, double, int );
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164
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165 externC double
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166 __kernel_sin( double, double, int );
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167
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168 externC double
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169 __kernel_cos( double, double );
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170
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171 externC double
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172 __kernel_tan( double, double, int );
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173
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174 externC int
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175 __kernel_rem_pio2( double *, double *, int, int, int, const int * );
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176
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177 #endif // ifdef CYGPKG_LIBM
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178
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179 #endif // CYGONCE_LIBM_MATHINCL_FDLIBM_H multiple inclusion protection
3111d98ba7b3 Initial commit of eCos version 1.1
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180
3111d98ba7b3 Initial commit of eCos version 1.1
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181 // EOF fdlibm.h