The latest version of the mainline FFTW distribution (FFTW 3.3.4) includes support for ARM NEON, and has all the functionality of our FFTW-ARM release except the cycle counters. It was developed by the original authors of FFTW, and is available from the FFTW download page.
We strongly recommend that all users transition to the mainline release.
Although their version was developed independently, the implementation is very similar (because there are only a few ways to code the FFTW primitives in NEON). Because of this, we expect that there will be very little difference in speed between their implementation and ours.
We will continue to make FFTW-ARM available here for stubborn users, but we are no longer maintaining, bug fixing, or supporting FFTW-ARM.
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