Is there some place I can find the FFT benchmark for blackfin processor based on fixed point-1024, 2048,4096,8192 complex FFT? I am doing some evaluation research. I need this results for the customer need.
Its best to dowload the FFT routines from the ADI site - http://www.analog.com/en/embedded-processing-dsp/Blackfin/processors/code-examples/Blackfin_Code_Examples/resources/fca.html - download the Fourier and Discrete Cosine Transform Function Sets
and refer to the individual examples for cycle numbers. Most of the .asm files have a formula based on the size of the FFT by which you can extrapolate the cycle numbers you want.
Hope this helps.
Many thanks for your reply. I just want to know the best perfomance of 8192 point complex FFT in all the blackfin processor and what is the smallest cycle count of 8192 complex FFT in all the blackfin processor?
I do appreciate your help.
For a 8K complex FFT it will be approximately 140000 cycles. Although, I will add that 8k and more is a little different because we would run out of L1 data SRAM space for any Blackfin (32K input buffer + 32K output buffer + twiddle factor table). So we will have to use an in-place FFT which will cost a little bit more because we would have to do the bit reversal before we begin the first stage...
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