int fft_f32([]Complex32 data)Single precision: the functions above on Complex32 / float, with the same contracts (fft_f32.sc). Same algorithm and threading; about 1e-6 relative error instead of 1e-15, half the memory traffic. fft_prepare_f32 fills the float twiddle table (fft_prepare doesn't), up to 4096 points it is compile-time like the double one.