The Mixed Radix FFT performs an FFT or inverse FFT on a frame of data of point size N where N = 2^A * 3^B * 5^C. The minimum value of A is 4 which means all supported point sizes are a multiple of 16. The maximum point size is determined by the amount of memory available to an AIE tile, so will be in the region of 2048 for cint32. Point size support is currently limited to 3300.