Texas Instruments TMS320C64X Programmer's Reference Manual page 53

Implementation Notes
Benchmarks
-
Bank Conflicts: No bank conflicts occur.
-
Interruptibility: The code is interruptible.
-
The routine uses log
either a radix-2 or radix-4 transform on the last stage depending on nx. If
nx is a power of 4, then this last stage is also a radix-4 transform, otherwise
it is a radix-2 transform.
-
See the fft16x16t implementation notes, as similar ideas are used.
Cycles (10.25 * nx/8 + 10) * ceil[log
Codesize 1056 bytes
(nx) − 1 stages of radix-4 transform and performs
4
(nx) − 1] + 6 * nx/4 + 81
4
C64x+ DSPLIB Reference
DSP_fft16x32
4-25