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Add Verific fairness/liveness support

This commit is contained in:
Clifford Wolf 2017-10-12 11:59:11 +02:00 committed by Kaj Tuomi
parent 90be0d800b
commit 3efce9dea9
1 changed files with 32 additions and 11 deletions
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43
frontends/verific/verific.cc
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@ -1500,6 +1500,7 @@ struct VerificSvaImporter
bool mode_assert = false;
bool mode_assume = false;
bool mode_cover = false;
bool eventually = false;
Instance *net_to_ast_driver(Net *n)
{
@ -1673,15 +1674,30 @@ struct VerificSvaImporter
// parse disable_iff expression
Net *sequence_net = at_node->Type() == PRIM_SVA_AT ? at_node->GetInput2() : at_node->GetInput1();
Instance *sequence_node = net_to_ast_driver(sequence_net);
if (sequence_node && sequence_node->Type() == PRIM_SVA_DISABLE_IFF) {
disable_iff = importer->net_map_at(sequence_node->GetInput1());
sequence_net = sequence_node->GetInput2();
} else
if (sequence_node && sequence_node->Type() == PRIM_ABORT) {
disable_iff = importer->net_map_at(sequence_node->GetInput2());
sequence_net = sequence_node->GetInput1();
while (1)
{
Instance *sequence_node = net_to_ast_driver(sequence_net);
if (sequence_node && sequence_node->Type() == PRIM_SVA_S_EVENTUALLY) {
eventually = true;
sequence_net = sequence_node->GetInput();
continue;
}
if (sequence_node && sequence_node->Type() == PRIM_SVA_DISABLE_IFF) {
disable_iff = importer->net_map_at(sequence_node->GetInput1());
sequence_net = sequence_node->GetInput2();
continue;
}
if (sequence_node && sequence_node->Type() == PRIM_ABORT) {
disable_iff = importer->net_map_at(sequence_node->GetInput2());
sequence_net = sequence_node->GetInput1();
continue;
}
break;
}
// parse SVA sequence into trigger signal
@ -1694,9 +1710,14 @@ struct VerificSvaImporter
RTLIL::IdString root_name = module->uniquify(importer->mode_names || root->IsUserDeclared() ? RTLIL::escape_id(root->Name()) : NEW_ID);
if (mode_assert) module->addAssert(root_name, seq.sig_a, seq.sig_en);
if (mode_assume) module->addAssume(root_name, seq.sig_a, seq.sig_en);
if (mode_cover) module->addCover(root_name, seq.sig_a, seq.sig_en);
if (eventually) {
if (mode_assert) module->addLive(root_name, seq.sig_a, seq.sig_en);
if (mode_assume) module->addFair(root_name, seq.sig_a, seq.sig_en);
} else {
if (mode_assert) module->addAssert(root_name, seq.sig_a, seq.sig_en);
if (mode_assume) module->addAssume(root_name, seq.sig_a, seq.sig_en);
if (mode_cover) module->addCover(root_name, seq.sig_a, seq.sig_en);
}
}
};