Mercurial > octave
annotate liboctave/numeric/lo-mappers.h @ 21231:5f318c8ec634
eliminate feature tests from lo-specfun.h
* lo-specfun.h, lo-specfun.cc (xacosh, xasinh, xatanh, xerf, xerfc
xexpm1, xlog1p, xcbrt): Rename to have 'x' prefix. Conditionally
define in .cc file. Change all uses Move complex versions of acosh,
asinh, and atanh functions here.
author | John W. Eaton <jwe@octave.org> |
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date | Tue, 09 Feb 2016 04:15:50 -0500 |
parents | 538b57866b90 |
children | b8cf410b5c88 |
rev | line source |
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1967 | 1 /* |
2 | |
19697
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3 Copyright (C) 1996-2015 John W. Eaton |
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4 Copyright (C) 2010 VZLU Prague |
1967 | 5 |
6 This file is part of Octave. | |
7 | |
8 Octave is free software; you can redistribute it and/or modify it | |
9 under the terms of the GNU General Public License as published by the | |
7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
11 option) any later version. | |
1967 | 12 |
13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 for more details. | |
17 | |
18 You should have received a copy of the GNU General Public License | |
7016 | 19 along with Octave; see the file COPYING. If not, see |
20 <http://www.gnu.org/licenses/>. | |
1967 | 21 |
22 */ | |
23 | |
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24 #if ! defined (octave_lo_mappers_h) |
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25 #define octave_lo_mappers_h 1 |
1967 | 26 |
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27 #include <limits> |
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28 |
1967 | 29 #include "oct-cmplx.h" |
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30 #include "lo-math.h" |
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31 #include "lo-ieee.h" |
1967 | 32 |
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33 // Double Precision |
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34 extern OCTAVE_API double xtrunc (double x); |
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35 extern OCTAVE_API double xcopysign (double x, double y); |
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36 inline double xceil (double x) { return ceil (x); } |
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37 extern OCTAVE_API double xfloor (double x); |
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38 inline double arg (double x) { return atan2 (0.0, x); } |
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39 inline double conj (double x) { return x; } |
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40 inline double fix (double x) { return xtrunc (x); } |
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41 inline double imag (double) { return 0.0; } |
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42 inline double real (double x) { return x; } |
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43 extern OCTAVE_API double xround (double x); |
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44 extern OCTAVE_API double xroundb (double x); |
6108 | 45 extern OCTAVE_API double signum (double x); |
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46 extern OCTAVE_API double xlog2 (double x); |
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47 extern OCTAVE_API Complex xlog2 (const Complex& x); |
7740 | 48 extern OCTAVE_API double xlog2 (double x, int& exp); |
49 extern OCTAVE_API Complex xlog2 (const Complex& x, int& exp); | |
6108 | 50 extern OCTAVE_API double xexp2 (double x); |
1967 | 51 |
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52 // These are used by the BOOL_OP macros in mx-op-defs.h. |
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53 inline bool xisnan (bool) { return false; } |
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54 inline bool xisnan (char) { return false; } |
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55 |
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56 #if defined (HAVE_CMATH_ISNAN) |
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57 inline bool xisnan (double x) |
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58 { return std::isnan (x); } |
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59 #else |
6108 | 60 extern OCTAVE_API bool xisnan (double x); |
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61 #endif |
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62 #if defined (HAVE_CMATH_ISFINITE) |
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63 inline bool xfinite (double x) |
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64 { return std::isfinite (x); } |
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65 #else |
6108 | 66 extern OCTAVE_API bool xfinite (double x); |
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67 #endif |
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68 #if defined (HAVE_CMATH_ISINF) |
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69 inline bool xisinf (double x) |
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70 { return std::isinf (x); } |
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71 #else |
6108 | 72 extern OCTAVE_API bool xisinf (double x); |
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73 #endif |
3248 | 74 |
6108 | 75 extern OCTAVE_API bool octave_is_NA (double x); |
4025 | 76 |
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77 // Generic xmin, xmax definitions |
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78 template <typename T> |
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79 inline T xmin (T x, T y) |
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80 { |
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81 return x <= y ? x : y; |
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82 } |
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83 |
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84 template <typename T> |
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85 inline T xmax (T x, T y) |
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86 { |
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87 return x >= y ? x : y; |
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88 } |
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89 |
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90 // This form is favorable. GCC will translate (x <= y ? x : y) without a |
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91 // jump, hence the only conditional jump involved will be the first |
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92 // (xisnan), infrequent and hence friendly to branch prediction. |
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93 inline double |
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94 xmin (double x, double y) |
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95 { |
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96 return xisnan (y) ? x : (x <= y ? x : y); |
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97 } |
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98 |
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99 inline double |
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100 xmax (double x, double y) |
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101 { |
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102 return xisnan (y) ? x : (x >= y ? x : y); |
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103 } |
1967 | 104 |
6108 | 105 extern OCTAVE_API Complex acos (const Complex& x); |
106 extern OCTAVE_API Complex asin (const Complex& x); | |
107 extern OCTAVE_API Complex atan (const Complex& x); | |
3777 | 108 |
6108 | 109 extern OCTAVE_API bool octave_is_NA (const Complex& x); |
110 extern OCTAVE_API bool octave_is_NaN_or_NA (const Complex& x); | |
4469 | 111 |
6108 | 112 extern OCTAVE_API Complex xmin (const Complex& x, const Complex& y); |
113 extern OCTAVE_API Complex xmax (const Complex& x, const Complex& y); | |
3248 | 114 |
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115 // Single Precision |
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116 extern OCTAVE_API float xtrunc (float x); |
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117 extern OCTAVE_API float xcopysign (float x, float y); |
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118 inline float xceil (float x) { return ceilf (x); } |
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119 extern OCTAVE_API float xfloor (float x); |
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120 inline float arg (float x) { return atan2f (0.0f, x); } |
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121 inline float conj (float x) { return x; } |
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122 inline float fix (float x) { return xtrunc (x); } |
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123 inline float imag (float) { return 0.0f; } |
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124 inline float real (float x) { return x; } |
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125 extern OCTAVE_API float xround (float x); |
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126 extern OCTAVE_API float xroundb (float x); |
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127 extern OCTAVE_API float signum (float x); |
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128 extern OCTAVE_API float xlog2 (float x); |
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129 extern OCTAVE_API FloatComplex xlog2 (const FloatComplex& x); |
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130 extern OCTAVE_API float xlog2 (float x, int& exp); |
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131 extern OCTAVE_API FloatComplex xlog2 (const FloatComplex& x, int& exp); |
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132 extern OCTAVE_API float xexp2 (float x); |
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133 |
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134 #if defined (HAVE_CMATH_ISNANF) |
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135 inline bool xisnan (float x) |
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136 { return std::isnan (x); } |
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137 #else |
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138 extern OCTAVE_API bool xisnan (float x); |
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139 #endif |
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140 #if defined (HAVE_CMATH_ISFINITEF) |
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141 inline bool xfinite (float x) |
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142 { return std::isfinite (x); } |
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143 #else |
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144 extern OCTAVE_API bool xfinite (float x); |
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145 #endif |
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146 #if defined (HAVE_CMATH_ISINFF) |
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148 { return std::isinf (x); } |
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149 #else |
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150 extern OCTAVE_API bool xisinf (float x); |
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151 #endif |
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152 |
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153 extern OCTAVE_API bool octave_is_NA (float x); |
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154 |
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155 inline float |
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156 xmin (float x, float y) |
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157 { |
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158 return xisnan (y) ? x : (x <= y ? x : y); |
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159 } |
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160 |
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161 inline float |
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162 xmax (float x, float y) |
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163 { |
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164 return xisnan (y) ? x : (x >= y ? x : y); |
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165 } |
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166 |
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167 extern OCTAVE_API FloatComplex acos (const FloatComplex& x); |
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168 extern OCTAVE_API FloatComplex asin (const FloatComplex& x); |
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169 extern OCTAVE_API FloatComplex atan (const FloatComplex& x); |
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170 |
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171 extern OCTAVE_API bool octave_is_NA (const FloatComplex& x); |
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172 extern OCTAVE_API bool octave_is_NaN_or_NA (const FloatComplex& x); |
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173 |
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174 extern OCTAVE_API FloatComplex xmin (const FloatComplex& x, |
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175 const FloatComplex& y); |
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176 extern OCTAVE_API FloatComplex xmax (const FloatComplex& x, |
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177 const FloatComplex& y); |
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178 |
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179 // These map reals to Complex. |
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180 |
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181 extern OCTAVE_API Complex rc_acos (double); |
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182 extern OCTAVE_API FloatComplex rc_acos (float); |
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183 extern OCTAVE_API Complex rc_acosh (double); |
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184 extern OCTAVE_API FloatComplex rc_acosh (float); |
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185 extern OCTAVE_API Complex rc_asin (double); |
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186 extern OCTAVE_API FloatComplex rc_asin (float); |
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187 extern OCTAVE_API Complex rc_atanh (double); |
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188 extern OCTAVE_API FloatComplex rc_atanh (float); |
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189 extern OCTAVE_API Complex rc_log (double); |
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190 extern OCTAVE_API FloatComplex rc_log (float); |
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191 extern OCTAVE_API Complex rc_log2 (double); |
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192 extern OCTAVE_API FloatComplex rc_log2 (float); |
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193 extern OCTAVE_API Complex rc_log10 (double); |
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194 extern OCTAVE_API FloatComplex rc_log10 (float); |
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195 extern OCTAVE_API Complex rc_sqrt (double); |
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196 extern OCTAVE_API FloatComplex rc_sqrt (float); |
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197 |
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198 // Some useful tests, that are commonly repeated. |
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199 // Test for a finite integer. |
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200 inline bool |
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201 xisinteger (double x) |
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202 { |
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203 return xfinite (x) && x == xround (x); |
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204 } |
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205 |
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206 inline bool |
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207 xisinteger (float x) |
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208 { |
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209 return xfinite (x) && x == xround (x); |
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210 } |
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211 |
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212 // Test for negative sign. |
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213 extern OCTAVE_API bool xnegative_sign (double x); |
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214 extern OCTAVE_API bool xnegative_sign (float x); |
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215 |
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216 // Test for positive sign. |
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217 inline bool xpositive_sign (double x) { return ! xnegative_sign (x); } |
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218 inline bool xpositive_sign (float x) { return ! xnegative_sign (x); } |
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219 |
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220 // Some old rounding functions. |
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221 |
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222 extern OCTAVE_API octave_idx_type NINTbig (double x); |
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223 extern OCTAVE_API octave_idx_type NINTbig (float x); |
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224 |
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225 extern OCTAVE_API int NINT (double x); |
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226 extern OCTAVE_API int NINT (float x); |
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227 |
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228 template <typename T> |
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229 T |
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230 X_NINT (T x) |
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231 { |
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232 return (xfinite (x) ? xfloor (x + 0.5) : x); |
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233 } |
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234 |
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235 inline OCTAVE_API double D_NINT (double x) { return X_NINT (x); } |
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236 inline OCTAVE_API float F_NINT (float x) { return X_NINT (x); } |
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237 |
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238 // Template functions can have either float or double arguments. |
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239 |
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240 template <typename T> |
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241 bool |
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242 xisnan (const std::complex<T>& x) |
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243 { |
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244 return (xisnan (real (x)) || xisnan (imag (x))); |
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245 } |
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246 |
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247 template <typename T> |
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248 bool |
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249 xfinite (const std::complex<T>& x) |
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250 { |
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251 return (xfinite (real (x)) && xfinite (imag (x))); |
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252 } |
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253 |
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254 template <typename T> |
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255 bool |
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256 xisinf (const std::complex<T>& x) |
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257 { |
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258 return (xisinf (real (x)) || xisinf (imag (x))); |
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259 } |
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260 |
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261 template <typename T> |
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262 std::complex<T> |
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263 fix (const std::complex<T>& x) |
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264 { |
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265 return std::complex<T> (fix (real (x)), fix (imag (x))); |
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266 } |
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267 |
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268 template <typename T> |
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269 std::complex<T> |
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270 ceil (const std::complex<T>& x) |
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271 { |
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272 return std::complex<T> (xceil (real (x)), xceil (imag (x))); |
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273 } |
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274 |
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275 template <typename T> |
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276 std::complex<T> |
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277 floor (const std::complex<T>& x) |
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278 { |
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279 return std::complex<T> (xfloor (real (x)), xfloor (imag (x))); |
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280 } |
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281 |
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282 template <typename T> |
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283 std::complex<T> |
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284 xround (const std::complex<T>& x) |
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285 { |
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286 return std::complex<T> (xround (real (x)), xround (imag (x))); |
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287 } |
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288 |
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289 template <typename T> |
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290 std::complex<T> |
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291 xroundb (const std::complex<T>& x) |
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292 { |
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293 return std::complex<T> (xroundb (real (x)), xroundb (imag (x))); |
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294 } |
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295 |
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296 template <typename T> |
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297 std::complex<T> |
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298 signum (const std::complex<T>& x) |
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299 { |
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300 T tmp = abs (x); |
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301 |
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302 return tmp == 0 ? 0.0 : x / tmp; |
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303 } |
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304 |
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305 template <typename T> |
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306 T |
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307 xmod (T x, T y) |
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308 { |
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309 T retval; |
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310 |
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311 if (y == 0) |
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312 retval = x; |
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313 else |
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314 { |
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315 T q = x / y; |
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316 |
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317 if (X_NINT (y) != y |
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318 && (std::abs ((q - X_NINT (q)) / X_NINT (q)) |
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319 < std::numeric_limits<T>::epsilon ())) |
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320 retval = 0; |
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321 else |
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322 { |
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323 T n = xfloor (q); |
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324 |
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325 // Prevent use of extra precision. |
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326 volatile T tmp = y * n; |
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327 |
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328 retval = x - tmp; |
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329 } |
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330 } |
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331 |
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332 if (x != y && y != 0) |
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333 retval = xcopysign (retval, y); |
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334 |
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335 return retval; |
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336 } |
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337 |
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338 template <typename T> |
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339 T |
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340 xrem (T x, T y) |
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341 { |
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342 T retval; |
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343 |
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344 if (y == 0) |
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345 retval = octave_NaN; |
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346 else |
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347 { |
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348 T q = x / y; |
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349 |
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350 if (X_NINT (y) != y |
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351 && (std::abs ((q - X_NINT (q)) / X_NINT (q)) |
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352 < std::numeric_limits<T>::epsilon ())) |
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353 retval = 0; |
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354 else |
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355 { |
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356 T n = xtrunc (q); |
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357 |
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358 // Prevent use of extra precision. |
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359 volatile T tmp = y * n; |
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360 |
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361 retval = x - tmp; |
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362 } |
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363 } |
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364 |
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365 if (x != y && y != 0) |
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366 retval = xcopysign (retval, x); |
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367 |
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368 return retval; |
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369 } |
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370 |
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371 template <typename T> |
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372 T |
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373 xsignbit (T x) |
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374 { |
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375 return signbit (x); |
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376 } |
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377 |
1967 | 378 #endif |