FFTW is a C subroutine library for computing the discrete Fourier transform (DFT) in one or more dimensions, of arbitrary input size, and of both real and complex data (as well as of even/odd data, i.e. the discrete cosine/sine transforms or DCT/DST). We believe that FFTW, which is free software, should become the FFT library of choice for most applications.
Intel 13, icc/ifort compiled with openmpi/intel/mlx1.6.5 support. Intel 14, icc/ifort compiled with openmpi/intel/14/mlx/1.6.5 support. (this is the recommended version).