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[/] [dblclockfft/] - Rev 28

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  • Rev 28, 2015-06-24 21:17:21 GMT
  • Author: dgisselq
  • Log message:
    This revision represents a lot of work to get the Verilator simulation to now
    match the FPGA performance. The big problem turned out to be in the
    bit reversal stage, where a '=' was used on a register instead of a '<='.
    Neither Verilator nor Vivado complained, but they each treated the result
    differently. In addition, a bug was traced to the soft butterfly, butterfly.v,
    whereby the delay through the butterfly did not properly change when the
    delay through the multiply changed. All of this has been fixed, and now
    appears to work and work well in both hardware and simulation.

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