loki Posted October 11, 2011 Report Share Posted October 11, 2011 I have had the worst nightmare with VMM handling Xs because the VMM hides Xs by declaring the register data as bit and not as logic. This makes it a royal pain to debug Xs, and the only way out is to assume that all Xs are bad by putting the following code in the xactor: if ($isunknown(tr.data)) begin `vmm_fatal(log,"Register has X: addr=%h data=%h",tr.addr,tr.data); end Is UVM like this or not? Quote Link to comment Share on other sites More sharing options...
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