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Current fftw source
author Chris Cannam <cannam@all-day-breakfast.com>
date Tue, 18 Oct 2016 13:40:26 +0100
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cannam@127 1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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cannam@127 3 <!-- This manual is for FFTW
cannam@127 4 (version 3.3.5, 30 July 2016).
cannam@127 5
cannam@127 6 Copyright (C) 2003 Matteo Frigo.
cannam@127 7
cannam@127 8 Copyright (C) 2003 Massachusetts Institute of Technology.
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cannam@127 10 Permission is granted to make and distribute verbatim copies of this
cannam@127 11 manual provided the copyright notice and this permission notice are
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cannam@127 14 Permission is granted to copy and distribute modified versions of this
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cannam@127 24 <head>
cannam@127 25 <title>FFTW 3.3.5: Calling FFTW from Modern Fortran</title>
cannam@127 26
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cannam@127 37 <link href="Overview-of-Fortran-interface.html#Overview-of-Fortran-interface" rel="next" title="Overview of Fortran interface">
cannam@127 38 <link href="FFTW-MPI-Fortran-Interface.html#FFTW-MPI-Fortran-Interface" rel="prev" title="FFTW MPI Fortran Interface">
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cannam@127 69 </head>
cannam@127 70
cannam@127 71 <body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
cannam@127 72 <a name="Calling-FFTW-from-Modern-Fortran"></a>
cannam@127 73 <div class="header">
cannam@127 74 <p>
cannam@127 75 Next: <a href="Calling-FFTW-from-Legacy-Fortran.html#Calling-FFTW-from-Legacy-Fortran" accesskey="n" rel="next">Calling FFTW from Legacy Fortran</a>, Previous: <a href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI" accesskey="p" rel="prev">Distributed-memory FFTW with MPI</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> &nbsp; [<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>
cannam@127 76 </div>
cannam@127 77 <hr>
cannam@127 78 <a name="Calling-FFTW-from-Modern-Fortran-1"></a>
cannam@127 79 <h2 class="chapter">7 Calling FFTW from Modern Fortran</h2>
cannam@127 80 <a name="index-Fortran-interface-2"></a>
cannam@127 81
cannam@127 82 <p>Fortran 2003 standardized ways for Fortran code to call C libraries,
cannam@127 83 and this allows us to support a direct translation of the FFTW C API
cannam@127 84 into Fortran. Compared to the legacy Fortran 77 interface
cannam@127 85 (see <a href="Calling-FFTW-from-Legacy-Fortran.html#Calling-FFTW-from-Legacy-Fortran">Calling FFTW from Legacy Fortran</a>), this direct interface
cannam@127 86 offers many advantages, especially compile-time type-checking and
cannam@127 87 aligned memory allocation. As of this writing, support for these C
cannam@127 88 interoperability features seems widespread, having been implemented in
cannam@127 89 nearly all major Fortran compilers (e.g. GNU, Intel, IBM,
cannam@127 90 Oracle/Solaris, Portland Group, NAG).
cannam@127 91 <a name="index-portability-4"></a>
cannam@127 92 </p>
cannam@127 93 <p>This chapter documents that interface. For the most part, since this
cannam@127 94 interface allows Fortran to call the C interface directly, the usage
cannam@127 95 is identical to C translated to Fortran syntax. However, there are a
cannam@127 96 few subtle points such as memory allocation, wisdom, and data types
cannam@127 97 that deserve closer attention.
cannam@127 98 </p>
cannam@127 99 <table class="menu" border="0" cellspacing="0">
cannam@127 100 <tr><td align="left" valign="top">&bull; <a href="Overview-of-Fortran-interface.html#Overview-of-Fortran-interface" accesskey="1">Overview of Fortran interface</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
cannam@127 101 </td></tr>
cannam@127 102 <tr><td align="left" valign="top">&bull; <a href="Reversing-array-dimensions.html#Reversing-array-dimensions" accesskey="2">Reversing array dimensions</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
cannam@127 103 </td></tr>
cannam@127 104 <tr><td align="left" valign="top">&bull; <a href="FFTW-Fortran-type-reference.html#FFTW-Fortran-type-reference" accesskey="3">FFTW Fortran type reference</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
cannam@127 105 </td></tr>
cannam@127 106 <tr><td align="left" valign="top">&bull; <a href="Plan-execution-in-Fortran.html#Plan-execution-in-Fortran" accesskey="4">Plan execution in Fortran</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
cannam@127 107 </td></tr>
cannam@127 108 <tr><td align="left" valign="top">&bull; <a href="Allocating-aligned-memory-in-Fortran.html#Allocating-aligned-memory-in-Fortran" accesskey="5">Allocating aligned memory in Fortran</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
cannam@127 109 </td></tr>
cannam@127 110 <tr><td align="left" valign="top">&bull; <a href="Accessing-the-wisdom-API-from-Fortran.html#Accessing-the-wisdom-API-from-Fortran" accesskey="6">Accessing the wisdom API from Fortran</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
cannam@127 111 </td></tr>
cannam@127 112 <tr><td align="left" valign="top">&bull; <a href="Defining-an-FFTW-module.html#Defining-an-FFTW-module" accesskey="7">Defining an FFTW module</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
cannam@127 113 </td></tr>
cannam@127 114 </table>
cannam@127 115
cannam@127 116
cannam@127 117
cannam@127 118
cannam@127 119 </body>
cannam@127 120 </html>