FFTJ: An FFT library
Author: Keiichi Ishioka
This is a library to compute 1D FFT of double precision complex/real data of size N (currently, supported N = 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024 for complex transform, and 2048 for real transform).
The library is developed to show high performance on Intel x86 (or compatible) CPUs which have SSE2 (after Pentium4).
License: see copyright file.
Appendix: a modified version for MacOSX on x86 by Yuji Kitamura is also available as fftj-0.2-macosx.tar.gz.