mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-23 21:15:11 +00:00
115 lines
5.9 KiB
HTML
115 lines
5.9 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
|
<html>
|
|
<!-- This manual is for FFTW
|
|
(version 3.3.10, 10 December 2020).
|
|
|
|
Copyright (C) 2003 Matteo Frigo.
|
|
|
|
Copyright (C) 2003 Massachusetts Institute of Technology.
|
|
|
|
Permission is granted to make and distribute verbatim copies of this
|
|
manual provided the copyright notice and this permission notice are
|
|
preserved on all copies.
|
|
|
|
Permission is granted to copy and distribute modified versions of this
|
|
manual under the conditions for verbatim copying, provided that the
|
|
entire resulting derived work is distributed under the terms of a
|
|
permission notice identical to this one.
|
|
|
|
Permission is granted to copy and distribute translations of this manual
|
|
into another language, under the above conditions for modified versions,
|
|
except that this permission notice may be stated in a translation
|
|
approved by the Free Software Foundation. -->
|
|
<!-- Created by GNU Texinfo 6.7, http://www.gnu.org/software/texinfo/ -->
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
|
<title>Calling FFTW from Legacy Fortran (FFTW 3.3.10)</title>
|
|
|
|
<meta name="description" content="Calling FFTW from Legacy Fortran (FFTW 3.3.10)">
|
|
<meta name="keywords" content="Calling FFTW from Legacy Fortran (FFTW 3.3.10)">
|
|
<meta name="resource-type" content="document">
|
|
<meta name="distribution" content="global">
|
|
<meta name="Generator" content="makeinfo">
|
|
<link href="index.html" rel="start" title="Top">
|
|
<link href="Concept-Index.html" rel="index" title="Concept Index">
|
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
|
<link href="index.html" rel="up" title="Top">
|
|
<link href="Fortran_002dinterface-routines.html" rel="next" title="Fortran-interface routines">
|
|
<link href="Defining-an-FFTW-module.html" rel="prev" title="Defining an FFTW module">
|
|
<style type="text/css">
|
|
<!--
|
|
a.summary-letter {text-decoration: none}
|
|
blockquote.indentedblock {margin-right: 0em}
|
|
div.display {margin-left: 3.2em}
|
|
div.example {margin-left: 3.2em}
|
|
div.lisp {margin-left: 3.2em}
|
|
kbd {font-style: oblique}
|
|
pre.display {font-family: inherit}
|
|
pre.format {font-family: inherit}
|
|
pre.menu-comment {font-family: serif}
|
|
pre.menu-preformatted {font-family: serif}
|
|
span.nolinebreak {white-space: nowrap}
|
|
span.roman {font-family: initial; font-weight: normal}
|
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
|
ul.no-bullet {list-style: none}
|
|
-->
|
|
</style>
|
|
|
|
|
|
</head>
|
|
|
|
<body lang="en">
|
|
<span id="Calling-FFTW-from-Legacy-Fortran"></span><div class="header">
|
|
<p>
|
|
Next: <a href="Upgrading-from-FFTW-version-2.html" accesskey="n" rel="next">Upgrading from FFTW version 2</a>, Previous: <a href="Calling-FFTW-from-Modern-Fortran.html" accesskey="p" rel="prev">Calling FFTW from Modern Fortran</a>, Up: <a href="index.html" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
|
|
</div>
|
|
<hr>
|
|
<span id="Calling-FFTW-from-Legacy-Fortran-1"></span><h2 class="chapter">8 Calling FFTW from Legacy Fortran</h2>
|
|
<span id="index-Fortran-interface-3"></span>
|
|
|
|
<p>This chapter describes the interface to FFTW callable by Fortran code
|
|
in older compilers not supporting the Fortran 2003 C interoperability
|
|
features (see <a href="Calling-FFTW-from-Modern-Fortran.html">Calling FFTW from Modern Fortran</a>). This interface
|
|
has the major disadvantage that it is not type-checked, so if you
|
|
mistake the argument types or ordering then your program will not have
|
|
any compiler errors, and will likely crash at runtime. So, greater
|
|
care is needed. Also, technically interfacing older Fortran versions
|
|
to C is nonstandard, but in practice we have found that the techniques
|
|
used in this chapter have worked with all known Fortran compilers for
|
|
many years.
|
|
</p>
|
|
<p>The legacy Fortran interface differs from the C interface only in the
|
|
prefix (‘<samp>dfftw_</samp>’ instead of ‘<samp>fftw_</samp>’ in double precision) and
|
|
a few other minor details. This Fortran interface is included in the
|
|
FFTW libraries by default, unless a Fortran compiler isn’t found on
|
|
your system or <code>--disable-fortran</code> is included in the
|
|
<code>configure</code> flags. We assume here that the reader is already
|
|
familiar with the usage of FFTW in C, as described elsewhere in this
|
|
manual.
|
|
</p>
|
|
<p>The MPI parallel interface to FFTW is <em>not</em> currently available
|
|
to legacy Fortran.
|
|
</p>
|
|
<table class="menu" border="0" cellspacing="0">
|
|
<tr><td align="left" valign="top">• <a href="Fortran_002dinterface-routines.html" accesskey="1">Fortran-interface routines</a></td><td> </td><td align="left" valign="top">
|
|
</td></tr>
|
|
<tr><td align="left" valign="top">• <a href="FFTW-Constants-in-Fortran.html" accesskey="2">FFTW Constants in Fortran</a></td><td> </td><td align="left" valign="top">
|
|
</td></tr>
|
|
<tr><td align="left" valign="top">• <a href="FFTW-Execution-in-Fortran.html" accesskey="3">FFTW Execution in Fortran</a></td><td> </td><td align="left" valign="top">
|
|
</td></tr>
|
|
<tr><td align="left" valign="top">• <a href="Fortran-Examples.html" accesskey="4">Fortran Examples</a></td><td> </td><td align="left" valign="top">
|
|
</td></tr>
|
|
<tr><td align="left" valign="top">• <a href="Wisdom-of-Fortran_003f.html" accesskey="5">Wisdom of Fortran?</a></td><td> </td><td align="left" valign="top">
|
|
</td></tr>
|
|
</table>
|
|
|
|
<hr>
|
|
<div class="header">
|
|
<p>
|
|
Next: <a href="Upgrading-from-FFTW-version-2.html" accesskey="n" rel="next">Upgrading from FFTW version 2</a>, Previous: <a href="Calling-FFTW-from-Modern-Fortran.html" accesskey="p" rel="prev">Calling FFTW from Modern Fortran</a>, Up: <a href="index.html" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
|
|
</div>
|
|
|
|
|
|
|
|
</body>
|
|
</html>
|