Subversion Repositories dblclockfft

Last modification

• 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.