mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-16 01:35:07 +00:00
91 lines
3.5 KiB
Groff
91 lines
3.5 KiB
Groff
.\"
|
|
.\" Copyright (c) 2003, 2007-14 Matteo Frigo
|
|
.\" Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
|
|
.\"
|
|
.\" This program is free software; you can redistribute it and/or modify
|
|
.\" it under the terms of the GNU General Public License as published by
|
|
.\" the Free Software Foundation; either version 2 of the License, or
|
|
.\" (at your option) any later version.
|
|
.\"
|
|
.\" This program is distributed in the hope that it will be useful,
|
|
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
.\" GNU General Public License for more details.
|
|
.\"
|
|
.\" You should have received a copy of the GNU General Public License
|
|
.\" along with this program; if not, write to the Free Software
|
|
.\" Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
.\"
|
|
.TH FFTW-WISDOM-TO-CONF 1 "February, 2003" "fftw" "fftw"
|
|
.SH NAME
|
|
fftw\-wisdom\-to\-conf \- generate FFTW wisdom (pre-planned transforms)
|
|
.SH SYNOPSIS
|
|
\fBfftw\-wisdom\-to\-conf\fR [< \fIINPUT\fR] [> \fIOUTPUT\fR]
|
|
.SH DESCRIPTION
|
|
.PP
|
|
.\" Add any additional description here
|
|
.I fftw\-wisdom\-to\-conf
|
|
is a utility to generate C
|
|
.B configuration
|
|
routines from FFTW
|
|
.B wisdom
|
|
files, where the latter contain saved information about how to
|
|
optimally compute (Fourier) transforms of various sizes. A
|
|
configuration routine is a C subroutine that you link into your
|
|
program, replacing a routine of the same name in the FFTW library,
|
|
that determines which parts of FFTW are callable by your program.
|
|
|
|
The reason to do this is that, if you only need transforms of a
|
|
limited set of sizes and types, and if you are statically linking your
|
|
program, then using a configuration file generated from wisdom for
|
|
those types can substantially reduce the size of your executable.
|
|
(Otherwise, because of FFTW's dynamic nature, all of FFTW's transform
|
|
code must be linked into any program using FFTW.)
|
|
|
|
FFTW is a free library to compute discrete Fourier transforms in one
|
|
or more dimensions, for arbitrary sizes, and of both real and complex
|
|
data, among other related operations. More information on FFTW can be
|
|
found at the FFTW home page:
|
|
.I http://www.fftw.org
|
|
|
|
.I fftw\-wisdom\-to\-conf
|
|
reads wisdom from standard input and writes the configuration to
|
|
standard output. It can easily be combined with the
|
|
.I fftw\-wisdom
|
|
tool, for example:
|
|
|
|
fftw\-wisdom \-n \-o wisdom cof1024 cob1024
|
|
.br
|
|
fftw\-wisdom\-to\-conf < wisdom > conf.c
|
|
|
|
will create a configuration "conf.c" containing only those parts of
|
|
FFTW needed for the optimized complex forwards and backwards
|
|
out-of-place transforms of size 1024 (also saving the wisdom itself in
|
|
"wisdom").
|
|
|
|
Alternatively, you can run your actual program, export wisdom for all
|
|
plans that were created (ideally in FFTW_PATIENT or FFTW_EXHAUSTIVE
|
|
mode), use this as input for \fIfftw\-wisdom\-to\-conf\fR,
|
|
and then re-link your program with the resulting configuration routine.
|
|
|
|
Note that the configuration routine does not contain the wisdom, only
|
|
the routines necessary to implement the wisdom, so your program should
|
|
also import the wisdom in order to benefit from the pre-optimized
|
|
plans.
|
|
.SH OPTIONS
|
|
.TP
|
|
\fB\-h\fR, \fB\-\-help\fR
|
|
Display help on the command-line options and usage.
|
|
.TP
|
|
\fB\-V\fR, \fB\-\-version\fR
|
|
Print the version number and copyright information.
|
|
.SH BUGS
|
|
Send bug reports to fftw@fftw.org.
|
|
.SH AUTHORS
|
|
Written by Steven G. Johnson and Matteo Frigo.
|
|
|
|
Copyright (c) 2003, 2007-14 Matteo Frigo
|
|
.br
|
|
Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
|
|
.SH "SEE ALSO"
|
|
fftw-wisdom(1)
|