Reply To: Waveforms not generated correctly (GHDL)

[Ariel]

I am using Vivado, with behavioral simulation for debugging and step-by-step investigation. Then, I can run all the tests with GHDL, because as you said, Vivado is very slow.

I am getting the same results in behavioral simulation in vivado and also in GHDL. As I want to be sure that post-synthesis works without generating a bitstream (which takes obviously longer) and test it on a board, I ran the post-synthesis simulation and I get different simulation results as behavioral.

So, how much could I trust that the simulation (in Vivado or GHDL) will match when implemented on an FPGA? Could it be then, as you said, the issue with xSim then that produces a “bad” post-synthesis simulation?