Mercurial > octave
annotate libinterp/dldfcn/fftw.cc @ 23024:a6a7b054e4ba
Rationalize #includes in libinterp/dldfcn directory.
* symbfact.cc, __delaunayn__.cc, __eigs__.cc, __fltk_uigetfile__.cc,
__glpk__.cc, __init_fltk__.cc, __init_gnuplot__.cc, __ode15__.cc,
__osmesa_print__.cc, __voronoi__.cc, amd.cc, audiodevinfo.cc, audioread.cc,
ccolamd.cc, chol.cc, colamd.cc, convhulln.cc, dmperm.cc, fftw.cc, gzip.cc,
qr.cc, symrcm.cc: Add missing #includes and remove excess ones.
author | Rik <rik@octave.org> |
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date | Mon, 09 Jan 2017 09:38:33 -0800 |
parents | 3a2b891d0b33 |
children | 5839d16828cb |
rev | line source |
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6228 | 1 /* |
2 | |
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3 Copyright (C) 2006-2016 David Bateman |
6228 | 4 |
5 This file is part of Octave. | |
6 | |
7 Octave is free software; you can redistribute it and/or modify it | |
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8 under the terms of the GNU General Public License as published by |
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9 the Free Software Foundation; either version 3 of the License, or |
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10 (at your option) any later version. |
6228 | 11 |
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12 Octave is distributed in the hope that it will be useful, but |
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13 WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 GNU General Public License for more details. |
6228 | 16 |
17 You should have received a copy of the GNU General Public License | |
7016 | 18 along with Octave; see the file COPYING. If not, see |
19 <http://www.gnu.org/licenses/>. | |
6228 | 20 |
21 */ | |
22 | |
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23 #if defined (HAVE_CONFIG_H) |
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24 # include "config.h" |
6228 | 25 #endif |
26 | |
27 #include <algorithm> | |
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28 #include <string> |
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29 |
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30 #if defined (HAVE_FFTW3_H) |
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31 # include <fftw3.h> |
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32 #endif |
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33 |
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34 #include "oct-fftw.h" |
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35 |
6228 | 36 #include "defun-dld.h" |
37 #include "error.h" | |
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38 #include "errwarn.h" |
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39 #include "ov.h" |
6228 | 40 |
41 DEFUN_DLD (fftw, args, , | |
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42 doc: /* -*- texinfo -*- |
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43 @deftypefn {} {@var{method} =} fftw ("planner") |
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44 @deftypefnx {} {} fftw ("planner", @var{method}) |
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45 @deftypefnx {} {@var{wisdom} =} fftw ("dwisdom") |
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46 @deftypefnx {} {} fftw ("dwisdom", @var{wisdom}) |
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47 @deftypefnx {} {} fftw ("threads", @var{nthreads}) |
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48 @deftypefnx {} {@var{nthreads} =} fftw ("threads") |
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49 |
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50 Manage @sc{fftw} wisdom data. |
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51 |
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52 Wisdom data can be used to significantly accelerate the calculation of the |
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53 FFTs, but implies an initial cost in its calculation. When the @sc{fftw} |
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54 libraries are initialized, they read a system wide wisdom file (typically in |
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55 @file{/etc/fftw/wisdom}), allowing wisdom to be shared between applications |
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56 other than Octave. Alternatively, the @code{fftw} function can be used to |
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57 import wisdom. For example, |
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58 |
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59 @example |
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60 @var{wisdom} = fftw ("dwisdom") |
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61 @end example |
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62 |
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63 @noindent |
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64 will save the existing wisdom used by Octave to the string @var{wisdom}. |
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65 This string can then be saved to a file and restored using the @code{save} |
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66 and @code{load} commands respectively. This existing wisdom can be |
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67 re-imported as follows |
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68 |
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69 @example |
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70 fftw ("dwisdom", @var{wisdom}) |
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71 @end example |
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72 |
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73 If @var{wisdom} is an empty string, then the wisdom used is cleared. |
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74 |
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75 During the calculation of Fourier transforms further wisdom is generated. |
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76 The fashion in which this wisdom is generated is also controlled by |
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77 the @code{fftw} function. There are five different manners in which the |
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78 wisdom can be treated: |
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79 |
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80 @table @asis |
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81 @item @qcode{"estimate"} |
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82 Specifies that no run-time measurement of the optimal means of |
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83 calculating a particular is performed, and a simple heuristic is used |
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84 to pick a (probably sub-optimal) plan. The advantage of this method is |
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85 that there is little or no overhead in the generation of the plan, which |
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86 is appropriate for a Fourier transform that will be calculated once. |
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87 |
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88 @item @qcode{"measure"} |
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89 In this case a range of algorithms to perform the transform is considered |
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90 and the best is selected based on their execution time. |
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91 |
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92 @item @qcode{"patient"} |
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93 Similar to @qcode{"measure"}, but a wider range of algorithms is |
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94 considered. |
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95 |
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96 @item @qcode{"exhaustive"} |
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97 Like @qcode{"measure"}, but all possible algorithms that may be used to |
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98 treat the transform are considered. |
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99 |
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100 @item @qcode{"hybrid"} |
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101 As run-time measurement of the algorithm can be expensive, this is a |
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102 compromise where @qcode{"measure"} is used for transforms up to the size |
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103 of 8192 and beyond that the @qcode{"estimate"} method is used. |
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104 @end table |
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105 |
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106 The default method is @qcode{"estimate"}. The current method can |
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107 be queried with |
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108 |
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109 @example |
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110 @var{method} = fftw ("planner") |
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111 @end example |
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112 |
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113 @noindent |
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114 or set by using |
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115 |
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116 @example |
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117 fftw ("planner", @var{method}) |
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118 @end example |
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119 |
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120 Note that calculated wisdom will be lost when restarting Octave. However, |
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121 the wisdom data can be reloaded if it is saved to a file as described |
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122 above. Saved wisdom files should not be used on different platforms since |
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123 they will not be efficient and the point of calculating the wisdom is lost. |
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124 |
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125 The number of threads used for computing the plans and executing the |
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126 transforms can be set with |
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127 |
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128 @example |
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129 fftw ("threads", @var{NTHREADS}) |
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130 @end example |
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131 |
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132 Note that octave must be compiled with multi-threaded @sc{fftw} support for |
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133 this feature. The number of processors available to the current process is |
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134 used per default. |
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135 |
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136 @seealso{fft, ifft, fft2, ifft2, fftn, ifftn} |
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137 @end deftypefn */) |
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139 #if defined (HAVE_FFTW) |
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141 int nargin = args.length (); |
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143 if (nargin < 1 || nargin > 2) | |
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144 print_usage (); |
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146 octave_value retval; |
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147 |
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148 std::string arg0 = args(0).xstring_value ("fftw: first argument must be a string"); |
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149 |
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150 if (arg0 == "planner") |
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152 if (nargin == 2) // planner setter |
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153 { |
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154 // Use STL function to convert to lower case |
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155 std::transform (arg0.begin (), arg0.end (), arg0.begin (), tolower); |
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156 |
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157 std::string arg1 = args(1).xstring_value ("fftw: METHOD must be a string"); |
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158 |
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159 std::transform (arg1.begin (), arg1.end (), arg1.begin (), tolower); |
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160 octave_fftw_planner::FftwMethod meth |
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161 = octave_fftw_planner::UNKNOWN; |
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162 octave_float_fftw_planner::FftwMethod methf |
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163 = octave_float_fftw_planner::UNKNOWN; |
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164 |
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165 if (arg1 == "estimate") |
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166 { |
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167 meth = octave_fftw_planner::ESTIMATE; |
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168 methf = octave_float_fftw_planner::ESTIMATE; |
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169 } |
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170 else if (arg1 == "measure") |
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171 { |
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172 meth = octave_fftw_planner::MEASURE; |
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173 methf = octave_float_fftw_planner::MEASURE; |
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174 } |
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175 else if (arg1 == "patient") |
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176 { |
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177 meth = octave_fftw_planner::PATIENT; |
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178 methf = octave_float_fftw_planner::PATIENT; |
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179 } |
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180 else if (arg1 == "exhaustive") |
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181 { |
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182 meth = octave_fftw_planner::EXHAUSTIVE; |
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183 methf = octave_float_fftw_planner::EXHAUSTIVE; |
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184 } |
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185 else if (arg1 == "hybrid") |
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186 { |
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187 meth = octave_fftw_planner::HYBRID; |
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188 methf = octave_float_fftw_planner::HYBRID; |
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189 } |
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190 else |
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191 error ("fftw: unrecognized planner METHOD"); |
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192 |
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193 meth = octave_fftw_planner::method (meth); |
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194 octave_float_fftw_planner::method (methf); |
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195 |
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196 if (meth == octave_fftw_planner::MEASURE) |
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197 retval = octave_value ("measure"); |
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198 else if (meth == octave_fftw_planner::PATIENT) |
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199 retval = octave_value ("patient"); |
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200 else if (meth == octave_fftw_planner::EXHAUSTIVE) |
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201 retval = octave_value ("exhaustive"); |
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202 else if (meth == octave_fftw_planner::HYBRID) |
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203 retval = octave_value ("hybrid"); |
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204 else |
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205 retval = octave_value ("estimate"); |
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206 } |
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207 else //planner getter |
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208 { |
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209 octave_fftw_planner::FftwMethod meth = |
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210 octave_fftw_planner::method (); |
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211 |
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212 if (meth == octave_fftw_planner::MEASURE) |
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213 retval = octave_value ("measure"); |
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214 else if (meth == octave_fftw_planner::PATIENT) |
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215 retval = octave_value ("patient"); |
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216 else if (meth == octave_fftw_planner::EXHAUSTIVE) |
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217 retval = octave_value ("exhaustive"); |
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218 else if (meth == octave_fftw_planner::HYBRID) |
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219 retval = octave_value ("hybrid"); |
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220 else |
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221 retval = octave_value ("estimate"); |
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222 } |
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223 } |
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224 else if (arg0 == "dwisdom") |
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225 { |
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226 if (nargin == 2) //dwisdom setter |
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227 { |
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228 // Use STL function to convert to lower case |
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229 std::transform (arg0.begin (), arg0.end (), arg0.begin (), |
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230 tolower); |
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231 |
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232 std::string arg1 = args(1).xstring_value ("fftw: WISDOM must be a string"); |
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233 |
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234 char *str = fftw_export_wisdom_to_string (); |
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235 std::string wisdom_str (str); |
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236 free (str); |
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237 |
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238 if (arg1.length () < 1) |
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239 fftw_forget_wisdom (); |
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240 else if (! fftw_import_wisdom_from_string (arg1.c_str ())) |
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241 error ("fftw: could not import supplied WISDOM"); |
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242 |
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243 retval = octave_value (wisdom_str); |
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244 } |
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245 else //dwisdom getter |
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246 { |
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247 char *str = fftw_export_wisdom_to_string (); |
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248 std::string wisdom_str (str); |
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249 free (str); |
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250 retval = octave_value (wisdom_str); |
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251 } |
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252 } |
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253 else if (arg0 == "swisdom") |
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254 { |
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255 //swisdom uses fftwf_ functions (float), dwisdom fftw_ (real) |
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256 if (nargin == 2) //swisdom setter |
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257 { |
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258 // Use STL function to convert to lower case |
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259 std::transform (arg0.begin (), arg0.end (), arg0.begin (), |
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260 tolower); |
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261 |
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262 std::string arg1 = args(1).xstring_value ("fftw: WISDOM must be a string"); |
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263 |
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264 char *str = fftwf_export_wisdom_to_string (); |
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265 std::string wisdom_str (str); |
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266 free (str); |
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267 |
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268 if (arg1.length () < 1) |
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269 fftwf_forget_wisdom (); |
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270 else if (! fftwf_import_wisdom_from_string (arg1.c_str ())) |
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271 error ("fftw: could not import supplied WISDOM"); |
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272 |
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273 retval = octave_value (wisdom_str); |
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274 } |
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275 else //swisdom getter |
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276 { |
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277 char *str = fftwf_export_wisdom_to_string (); |
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278 std::string wisdom_str (str); |
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279 free (str); |
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280 retval = octave_value (wisdom_str); |
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281 } |
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282 } |
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283 else if (arg0 == "threads") |
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284 { |
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285 if (nargin == 2) //threads setter |
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286 { |
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287 if (! args(1).is_real_scalar ()) |
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288 error ("fftw: setting threads needs one integer argument"); |
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289 |
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290 int nthreads = args(1).int_value(); |
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291 if (nthreads < 1) |
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292 error ("fftw: number of threads must be >=1"); |
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293 |
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294 #if defined (HAVE_FFTW3_THREADS) |
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295 octave_fftw_planner::threads (nthreads); |
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296 #else |
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297 err_disabled_feature ("fftw", "multithreaded FFTW"); |
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298 #endif |
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299 #if defined (HAVE_FFTW3F_THREADS) |
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300 octave_float_fftw_planner::threads (nthreads); |
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301 #else |
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302 err_disabled_feature ("fftw", "multithreaded FFTW"); |
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303 #endif |
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304 } |
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305 else //threads getter |
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306 #if defined (HAVE_FFTW3_THREADS) |
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307 retval = octave_value (octave_fftw_planner::threads()); |
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308 #else |
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309 retval = 1; |
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310 #endif |
6228 | 311 } |
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312 else |
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313 error ("fftw: unrecognized argument"); |
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314 |
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315 return retval; |
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316 |
6228 | 317 #else |
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318 |
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319 octave_unused_parameter (args); |
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320 |
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321 err_disabled_feature ("fftw", "the FFTW3 planner"); |
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322 |
6228 | 323 #endif |
324 } | |
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325 |
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326 /* |
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327 %!testif HAVE_FFTW |
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328 %! def_method = fftw ("planner"); |
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329 %! unwind_protect |
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330 %! method = "estimate"; |
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331 %! fftw ("planner", method); |
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332 %! assert (fftw ("planner"), method); |
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333 %! method = "measure"; |
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334 %! fftw ("planner", method); |
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335 %! assert (fftw ("planner"), method); |
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336 %! method = "patient"; |
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337 %! fftw ("planner", method); |
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338 %! assert (fftw ("planner"), method); |
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339 %! method = "exhaustive"; |
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340 %! fftw ("planner", method); |
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341 %! assert (fftw ("planner"), method); |
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342 %! method = "hybrid"; |
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343 %! fftw ("planner", method); |
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344 %! assert (fftw ("planner"), method); |
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345 %! unwind_protect_cleanup |
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346 %! fftw ("planner", def_method); |
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347 %! end_unwind_protect |
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348 |
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349 %!testif HAVE_FFTW |
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350 %! def_dwisdom = fftw ("dwisdom"); |
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351 %! def_swisdom = fftw ("swisdom"); |
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352 %! unwind_protect |
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353 %! wisdom = fftw ("dwisdom"); |
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354 %! assert (ischar (wisdom)); |
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355 %! fftw ("dwisdom", wisdom); |
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356 %! assert (fftw ("dwisdom"), wisdom); |
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357 %! wisdom = fftw ("swisdom"); |
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358 %! assert (ischar (wisdom)); |
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359 %! fftw ("swisdom", wisdom); |
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360 %! assert (fftw ("swisdom"), wisdom); |
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361 %! unwind_protect_cleanup |
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362 %! fftw ("dwisdom", def_dwisdom); |
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363 %! fftw ("swisdom", def_swisdom); |
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364 %! end_unwind_protect |
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365 |
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366 %!testif HAVE_FFTW3_THREADS |
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367 %! n = fftw ("threads"); |
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368 %! unwind_protect |
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369 %! fftw ("threads", 3); |
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370 %! assert (fftw ("threads"), 3); |
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371 %! unwind_protect_cleanup |
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15818
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372 %! fftw ("threads", n); |
bde7731b2b83
added FFTW multithreaded library support
Andreas Weber <andy.weber.aw@gmail.com>
parents:
15818
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changeset
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373 %! end_unwind_protect |
19130
90421e725f1d
codesprint: Tests for fftw
Mike Miller <mtmiller@ieee.org>
parents:
18678
diff
changeset
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374 |
22271
16efd0403698
Add %!error test pattern matches for disabled optional features
Mike Miller <mtmiller@octave.org>
parents:
21966
diff
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375 %!error <Invalid call to fftw|was unavailable or disabled> fftw () |
16efd0403698
Add %!error test pattern matches for disabled optional features
Mike Miller <mtmiller@octave.org>
parents:
21966
diff
changeset
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376 %!error <Invalid call to fftw|was unavailable or disabled> fftw ("planner", "estimate", "measure") |
21581
6fab85c1538f
maint: Follow Octave conventions for use of semicolon in BIST tests.
Rik <rik@octave.org>
parents:
21451
diff
changeset
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377 %!error fftw (3) |
6fab85c1538f
maint: Follow Octave conventions for use of semicolon in BIST tests.
Rik <rik@octave.org>
parents:
21451
diff
changeset
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378 %!error fftw ("invalid") |
6fab85c1538f
maint: Follow Octave conventions for use of semicolon in BIST tests.
Rik <rik@octave.org>
parents:
21451
diff
changeset
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379 %!error fftw ("planner", "invalid") |
6fab85c1538f
maint: Follow Octave conventions for use of semicolon in BIST tests.
Rik <rik@octave.org>
parents:
21451
diff
changeset
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380 %!error fftw ("planner", 2) |
6fab85c1538f
maint: Follow Octave conventions for use of semicolon in BIST tests.
Rik <rik@octave.org>
parents:
21451
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changeset
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381 %!error fftw ("dwisdom", "invalid") |
6fab85c1538f
maint: Follow Octave conventions for use of semicolon in BIST tests.
Rik <rik@octave.org>
parents:
21451
diff
changeset
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382 %!error fftw ("swisdom", "invalid") |
6fab85c1538f
maint: Follow Octave conventions for use of semicolon in BIST tests.
Rik <rik@octave.org>
parents:
21451
diff
changeset
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383 %!error fftw ("threads", "invalid") |
6fab85c1538f
maint: Follow Octave conventions for use of semicolon in BIST tests.
Rik <rik@octave.org>
parents:
21451
diff
changeset
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384 %!error fftw ("threads", -3) |
15741
f63a4f23bfe7
Fix infinite loop when setting fftw planner method (bug #37873)
Mike Miller <mtmiller@ieee.org>
parents:
14138
diff
changeset
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385 */ |
22407
34ce5be04942
maint: Style check C++ code in libinterp/.
Rik <rik@octave.org>
parents:
22323
diff
changeset
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386 |