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library for computing Fast Fourier Transforms

The FFTW library computes Fast Fourier Transforms (FFT) in one or more dimensions. It is extremely fast. This package contains the shared library versions of the fftw libraries in single, double and long double precisions. Note that on some architectures double is the same as long double in which case there is no long double library.

To get the static library and the header files, you need to install libfftw3-dev. For documentation, see libfftw3-doc.

Package version:3.2.2-1


FFTW is a free collection of fast C routines for computing the
Discrete Fourier Transform in one or more dimensions.  It includes
complex, real, symmetric, and parallel transforms, and can handle
arbitrary array sizes efficiently.  FFTW is typically faster than
other publically-available FFT implementations, and is even
competitive with vendor-tuned libraries.  (See our web page for
extensive benc


fftw3 for DEBIAN

Some of the changes made for version 3 of FFTW necessitated changes to the API,
so you will need to make (minor) changes when moving existing programs to this
version. See the documentation (in package fftw3-doc) for details.

In fftw2 separate packages included optimizations for SIMD
instructions. In fftw3 all such optimizations (x86 and powerpc) are


FFTW 3.2.2

* Improve performance of some copy operations of complex arrays on
  x86 machines.

* Add configure flag to disable alloca(), which is broken in mingw64.

* Planning in FFTW_ESTIMATE mode for r2r transforms became slower
  between fftw-3.1.3 and 3.2.  This regression has now been fixed.

FFTW 3.2.1

* Performance improvements for some multidimensional r2c/c2r transforms;
  thanks to Eu


fftw3 (3.2.2-1) unstable; urgency=low

  * New upstream release
  * Acknowledge non-maintainer uploa


Sun Jul 12 06:34:46 EDT 2009
  * Update NEWS, version number for 3.2.2 release.



This package was debianized by James A. Treacy on
Tue, 22 Apr 2003 12:50:10 -0500


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