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Add "rand" and "rand const" verific support

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This commit is contained in:
Clifford Wolf 2017-02-09 12:53:46 +01:00
parent ef4a28e112
commit 2ca8d483dd
1 changed files with 41 additions and 0 deletions
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41
frontends/verific/verific.cc
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@ -617,6 +617,9 @@ struct VerificImporter
module->fixup_ports(); module->fixup_ports();
pool<Net*, hash_ptr_ops> anyconst_nets;
pool<Net*, hash_ptr_ops> anyseq_nets;
FOREACH_NET_OF_NETLIST(nl, mi, net) FOREACH_NET_OF_NETLIST(nl, mi, net)
{ {
if (net->IsRamNet()) if (net->IsRamNet())
@ -646,6 +649,15 @@ struct VerificImporter
continue; continue;
} }
const char *rand_const_attr = net->GetAttValue(" rand_const");
const char *rand_attr = net->GetAttValue(" rand");
if (rand_const_attr != nullptr && !strcmp(rand_const_attr, "1"))
anyconst_nets.insert(net);
else if (rand_attr != nullptr && !strcmp(rand_attr, "1"))
anyseq_nets.insert(net);
if (net_map.count(net)) { if (net_map.count(net)) {
// log(" skipping net %s.\n", net->Name()); // log(" skipping net %s.\n", net->Name());
continue; continue;
@ -700,7 +712,36 @@ struct VerificImporter
{ {
// log(" skipping netbus %s.\n", netbus->Name()); // log(" skipping netbus %s.\n", netbus->Name());
} }
SigSpec anyconst_sig;
SigSpec anyseq_sig;
for (int i = netbus->RightIndex();; i += netbus->IsUp() ? -1 : +1) {
net = netbus->ElementAtIndex(i);
if (net != nullptr && anyconst_nets.count(net)) {
anyconst_sig.append(net_map.at(net));
anyconst_nets.erase(net);
} }
if (net != nullptr && anyseq_nets.count(net)) {
anyseq_sig.append(net_map.at(net));
anyseq_nets.erase(net);
}
if (i == netbus->LeftIndex())
break;
}
if (GetSize(anyconst_sig))
module->connect(anyconst_sig, module->Anyconst(NEW_ID, GetSize(anyconst_sig)));
if (GetSize(anyseq_sig))
module->connect(anyseq_sig, module->Anyseq(NEW_ID, GetSize(anyseq_sig)));
}
for (auto net : anyconst_nets)
module->connect(net_map.at(net), module->Anyconst(NEW_ID));
for (auto net : anyseq_nets)
module->connect(net_map.at(net), module->Anyseq(NEW_ID));
FOREACH_INSTANCE_OF_NETLIST(nl, mi, inst) FOREACH_INSTANCE_OF_NETLIST(nl, mi, inst)
{ {