Download the latest version 0.32

GFFT is open source software distributed under terms of GPLv2.

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Download the source code from the project web site at SourceForge

Change log

Version 0.32 (2015-04-16)

• Improved single- and multi-theaded performance (OpenMP)
• CMake files contain support for GCC, Clang, Intel C++ and MSVC
• Examples of compile-time computations of pi (metapi.cpp) and square root (metasqrt.cpp)
• Fixed accuracy bug in single precision FFTs

Version 0.31 (2014-02-22)

Accuracy and performance benchmarks added in the subfolder 'test'

Version 0.3 (2014-02-07)

The project is back after about 5 years break with a couple of new powerful features:

• Out-of-place transforms
• Complex transforms of any length N
• Compile-time factorization of the input length N
• Better accuracy due to compile-time computation of the roots-of-unity as rationals

Version 0.2 (2009-12-28)

Completely redesigned release to make the usage even more simple and to implement many new features in the future.

• New template class GenerateTransform to define a set of transforms.
• New notation for different transform types taken from SPIRAL project. The following transforms in-place are now implemented: DFT, IDFT, RDFT, IRDFT
• Reordered template parameters for the transforms definitions, where most important parameters go first and less important parameters may be omitted using defaults.
• Multithreaded parallelization using OpenMP standard
• Bug fixes

Version 0.11 (2008-07-04)

Bug-fixig release

Version 0.1 (2008-02-22)

Initial release of GFFT with the following features:

• Transforms in-place
• Complex FFT of power-of-two length
• Real-valued FFT of power-of-two length
• High and cache-independent performance
• No additional data is stored.
  You can use all available RAM for your transform data
• One-step transform.
  Many known FFT implementation perform to steps: initialization and transform. Initialization for a given length is usually computationally expensive, while transform is fast. GFFT needs only to create an object instance that includes FFT-algorithm, but no additional data or computation.

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