I added ARM NEON SIMD support to kiss FFT. Beware, this primarily enables 2 and 4 parallel FFTs, it not necessarily speeds up a single transform (well, in fact it does :-))

Runtime for real-to-complex transform (N=256, forward and inverse transform, 10000 repetitions) in seconds:

float	float (RunFast)	float32x2_t	float32x4_t
1.62	1.22	0.66	0.98

Note: float32x2_t and float32x4_t, respectively, compute two and four FFTs in parallel!

posted at: 15:33 | path: /programming | permanent link