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1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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2 <html>
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3 <!-- This manual is for FFTW
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4 (version 3.3.8, 24 May 2018).
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5
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6 Copyright (C) 2003 Matteo Frigo.
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7
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8 Copyright (C) 2003 Massachusetts Institute of Technology.
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9
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10 Permission is granted to make and distribute verbatim copies of this
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11 manual provided the copyright notice and this permission notice are
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12 preserved on all copies.
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13
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14 Permission is granted to copy and distribute modified versions of this
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15 manual under the conditions for verbatim copying, provided that the
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16 entire resulting derived work is distributed under the terms of a
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17 permission notice identical to this one.
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18
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19 Permission is granted to copy and distribute translations of this manual
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20 into another language, under the above conditions for modified versions,
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22 approved by the Free Software Foundation. -->
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23 <!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
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24 <head>
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25 <title>FFTW 3.3.8: Wisdom Utilities</title>
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26
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27 <meta name="description" content="FFTW 3.3.8: Wisdom Utilities">
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33 <link href="index.html#Top" rel="start" title="Top">
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34 <link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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35 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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36 <link href="Wisdom.html#Wisdom" rel="up" title="Wisdom">
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37 <link href="What-FFTW-Really-Computes.html#What-FFTW-Really-Computes" rel="next" title="What FFTW Really Computes">
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38 <link href="Forgetting-Wisdom.html#Forgetting-Wisdom" rel="prev" title="Forgetting Wisdom">
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65 </style>
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68 </head>
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69
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70 <body lang="en">
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71 <a name="Wisdom-Utilities"></a>
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72 <div class="header">
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73 <p>
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74 Previous: <a href="Forgetting-Wisdom.html#Forgetting-Wisdom" accesskey="p" rel="prev">Forgetting Wisdom</a>, Up: <a href="Wisdom.html#Wisdom" accesskey="u" rel="up">Wisdom</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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75 </div>
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76 <hr>
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77 <a name="Wisdom-Utilities-1"></a>
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78 <h4 class="subsection">4.7.4 Wisdom Utilities</h4>
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79
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80 <p>FFTW includes two standalone utility programs that deal with wisdom. We
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81 merely summarize them here, since they come with their own <code>man</code>
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82 pages for Unix and GNU systems (with HTML versions on our web site).
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83 </p>
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84 <p>The first program is <code>fftw-wisdom</code> (or <code>fftwf-wisdom</code> in
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85 single precision, etcetera), which can be used to create a wisdom file
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86 containing plans for any of the transform sizes and types supported by
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87 FFTW. It is preferable to create wisdom directly from your executable
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88 (see <a href="Caveats-in-Using-Wisdom.html#Caveats-in-Using-Wisdom">Caveats in Using Wisdom</a>), but this program is useful for
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89 creating global wisdom files for <code>fftw_import_system_wisdom</code>.
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90 <a name="index-fftw_002dwisdom-utility-1"></a>
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91 </p>
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92
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93 <p>The second program is <code>fftw-wisdom-to-conf</code>, which takes a wisdom
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94 file as input and produces a <em>configuration routine</em> as output. The
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95 latter is a C subroutine that you can compile and link into your
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96 program, replacing a routine of the same name in the FFTW library, that
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97 determines which parts of FFTW are callable by your program.
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98 <code>fftw-wisdom-to-conf</code> produces a configuration routine that links
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99 to only those parts of FFTW needed by the saved plans in the wisdom,
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100 greatly reducing the size of statically linked executables (which should
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101 only attempt to create plans corresponding to those in the wisdom,
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102 however).
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103 <a name="index-fftw_002dwisdom_002dto_002dconf-utility"></a>
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104 <a name="index-configuration-routines"></a>
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105 </p>
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106
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107
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108
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109 </body>
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110 </html>
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