Forum Discussion

MamaSaru's avatar
MamaSaru
Icon for Occasional Contributor rankOccasional Contributor
2 years ago
Solved

eq output of lpm_counter does not see higher q bits in simulation.

I found the error in simulation library source file 220model.v. #3866 assign eq = tmp_eq; should be: assign eq = (final_count < 16) ? tmp_eq : 0; to confirm higher q bits are all zero. My simul...
Simulation
  • MamaSaru's avatar
    MamaSaru
    2 years ago

    Richard,
    No thanks, it was just feedback to Questa.
    Thank you for your effort.
    Regards,

FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
2 years ago

Hi,
I suspect there are more faults. Do you understand the idea behind tmp_eq?

B.T.W., there's apparently a longer tradition of incorrect lpm_counter models. Modelsim_AE was never using eq in 220model.v, simply zeroing it.

assign eq = {16{1'b0}};

No idea if the limitations are specified somewhere?