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AR# 32395

LogiCORE Fast Fourier Transform (FFT) v6.0 - When I target a Radix-4 implementation, the resource count in the GUI is more than what I see in the MAP report. Why?

Description

When I target a Radix-4 implementation, the resource count in the GUI is more than what I see in the MAP report. Why?

Solution

There is a problem with the resource estimation, when targeting a Radix-4 implemenation, where the resource estimation can be off by a factor of 2. (i.e. , The GUI might say 104 DSPs, but the final implemenation is only 54.) 

 

To find the correct resource usage, see the MAP report. 

 

For a detailed list of LogiCORE Fast Fourier Transform (FFT) Release Notes and Known Issues, see (Xilinx Answer 29209).

AR# 32395
Date Created 04/09/2009
Last Updated 05/21/2014
Status Archive
Type General Article