Anthony Colavecchio

MPC74xx AN2115: Altivec Improvement for FFT

Discussion created by Anthony Colavecchio on Sep 19, 2006
Latest reply on Sep 20, 2006 by Tom Thompson
I am intested in getting an estimated improvement ratio for implementing an FFT in Altivec vs not doing so.  I looked in AN2115 and saw for a size N FFT Altivec is 6.99 times faster than its scalar equivalent.  Is this true?  That seems a bit much.  Does anyone know how long it would take to perform a complex 2D FFT in Altivec for a 64x64 array?
(Alban updated title & moved to better board)

Message Edited by Alban on 2006-09-20 08:31 AM