|
Chris@10
|
1 <html lang="en">
|
|
Chris@10
|
2 <head>
|
|
Chris@10
|
3 <title>FFTW Constants in Fortran - FFTW 3.3.3</title>
|
|
Chris@10
|
4 <meta http-equiv="Content-Type" content="text/html">
|
|
Chris@10
|
5 <meta name="description" content="FFTW 3.3.3">
|
|
Chris@10
|
6 <meta name="generator" content="makeinfo 4.13">
|
|
Chris@10
|
7 <link title="Top" rel="start" href="index.html#Top">
|
|
Chris@10
|
8 <link rel="up" href="Calling-FFTW-from-Legacy-Fortran.html#Calling-FFTW-from-Legacy-Fortran" title="Calling FFTW from Legacy Fortran">
|
|
Chris@10
|
9 <link rel="prev" href="Fortran_002dinterface-routines.html#Fortran_002dinterface-routines" title="Fortran-interface routines">
|
|
Chris@10
|
10 <link rel="next" href="FFTW-Execution-in-Fortran.html#FFTW-Execution-in-Fortran" title="FFTW Execution in Fortran">
|
|
Chris@10
|
11 <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
Chris@10
|
12 <!--
|
|
Chris@10
|
13 This manual is for FFTW
|
|
Chris@10
|
14 (version 3.3.3, 25 November 2012).
|
|
Chris@10
|
15
|
|
Chris@10
|
16 Copyright (C) 2003 Matteo Frigo.
|
|
Chris@10
|
17
|
|
Chris@10
|
18 Copyright (C) 2003 Massachusetts Institute of Technology.
|
|
Chris@10
|
19
|
|
Chris@10
|
20 Permission is granted to make and distribute verbatim copies of
|
|
Chris@10
|
21 this manual provided the copyright notice and this permission
|
|
Chris@10
|
22 notice are preserved on all copies.
|
|
Chris@10
|
23
|
|
Chris@10
|
24 Permission is granted to copy and distribute modified versions of
|
|
Chris@10
|
25 this manual under the conditions for verbatim copying, provided
|
|
Chris@10
|
26 that the entire resulting derived work is distributed under the
|
|
Chris@10
|
27 terms of a permission notice identical to this one.
|
|
Chris@10
|
28
|
|
Chris@10
|
29 Permission is granted to copy and distribute translations of this
|
|
Chris@10
|
30 manual into another language, under the above conditions for
|
|
Chris@10
|
31 modified versions, except that this permission notice may be
|
|
Chris@10
|
32 stated in a translation approved by the Free Software Foundation.
|
|
Chris@10
|
33 -->
|
|
Chris@10
|
34 <meta http-equiv="Content-Style-Type" content="text/css">
|
|
Chris@10
|
35 <style type="text/css"><!--
|
|
Chris@10
|
36 pre.display { font-family:inherit }
|
|
Chris@10
|
37 pre.format { font-family:inherit }
|
|
Chris@10
|
38 pre.smalldisplay { font-family:inherit; font-size:smaller }
|
|
Chris@10
|
39 pre.smallformat { font-family:inherit; font-size:smaller }
|
|
Chris@10
|
40 pre.smallexample { font-size:smaller }
|
|
Chris@10
|
41 pre.smalllisp { font-size:smaller }
|
|
Chris@10
|
42 span.sc { font-variant:small-caps }
|
|
Chris@10
|
43 span.roman { font-family:serif; font-weight:normal; }
|
|
Chris@10
|
44 span.sansserif { font-family:sans-serif; font-weight:normal; }
|
|
Chris@10
|
45 --></style>
|
|
Chris@10
|
46 </head>
|
|
Chris@10
|
47 <body>
|
|
Chris@10
|
48 <div class="node">
|
|
Chris@10
|
49 <a name="FFTW-Constants-in-Fortran"></a>
|
|
Chris@10
|
50 <p>
|
|
Chris@10
|
51 Next: <a rel="next" accesskey="n" href="FFTW-Execution-in-Fortran.html#FFTW-Execution-in-Fortran">FFTW Execution in Fortran</a>,
|
|
Chris@10
|
52 Previous: <a rel="previous" accesskey="p" href="Fortran_002dinterface-routines.html#Fortran_002dinterface-routines">Fortran-interface routines</a>,
|
|
Chris@10
|
53 Up: <a rel="up" accesskey="u" href="Calling-FFTW-from-Legacy-Fortran.html#Calling-FFTW-from-Legacy-Fortran">Calling FFTW from Legacy Fortran</a>
|
|
Chris@10
|
54 <hr>
|
|
Chris@10
|
55 </div>
|
|
Chris@10
|
56
|
|
Chris@10
|
57 <h3 class="section">8.2 FFTW Constants in Fortran</h3>
|
|
Chris@10
|
58
|
|
Chris@10
|
59 <p>When creating plans in FFTW, a number of constants are used to specify
|
|
Chris@10
|
60 options, such as <code>FFTW_MEASURE</code> or <code>FFTW_ESTIMATE</code>. The
|
|
Chris@10
|
61 same constants must be used with the wrapper routines, but of course the
|
|
Chris@10
|
62 C header files where the constants are defined can't be incorporated
|
|
Chris@10
|
63 directly into Fortran code.
|
|
Chris@10
|
64
|
|
Chris@10
|
65 <p>Instead, we have placed Fortran equivalents of the FFTW constant
|
|
Chris@10
|
66 definitions in the file <code>fftw3.f</code>, which can be found in the same
|
|
Chris@10
|
67 directory as <code>fftw3.h</code>. If your Fortran compiler supports a
|
|
Chris@10
|
68 preprocessor of some sort, you should be able to <code>include</code> or
|
|
Chris@10
|
69 <code>#include</code> this file; otherwise, you can paste it directly into
|
|
Chris@10
|
70 your code.
|
|
Chris@10
|
71
|
|
Chris@10
|
72 <p><a name="index-flags-583"></a>In C, you combine different flags (like <code>FFTW_PRESERVE_INPUT</code> and
|
|
Chris@10
|
73 <code>FFTW_MEASURE</code>) using the ‘<samp><code>|</code></samp>’ operator; in Fortran
|
|
Chris@10
|
74 you should just use ‘<samp><code>+</code></samp>’. (Take care not to add in the
|
|
Chris@10
|
75 same flag more than once, though. Alternatively, you can use the
|
|
Chris@10
|
76 <code>ior</code> intrinsic function standardized in Fortran 95.)
|
|
Chris@10
|
77
|
|
Chris@10
|
78 <!-- -->
|
|
Chris@10
|
79 </body></html>
|
|
Chris@10
|
80
|
