From 109b88c3791c87e819fb5a6c3c52f964655fd379 Mon Sep 17 00:00:00 2001
From: Miodrag Milanovic <mmicko@gmail.com>
Date: Wed, 8 Feb 2023 09:22:48 +0100
Subject: For case select values use Sa instead of Sx and Sz

---
 frontends/verific/verific.cc | 46 +++++++++++++++++++++++++++++++++++++++-----
 frontends/verific/verific.h  |  1 +
 2 files changed, 42 insertions(+), 5 deletions(-)

diff --git a/frontends/verific/verific.cc b/frontends/verific/verific.cc
index 92a2a5ce1..c1e9fc7d0 100644
--- a/frontends/verific/verific.cc
+++ b/frontends/verific/verific.cc
@@ -361,10 +361,16 @@ RTLIL::SigSpec VerificImporter::operatorInport(Instance *inst, const char *portn
 		for (unsigned i = 0; i < portbus->Size(); i++) {
 			Net *net = inst->GetNet(portbus->ElementAtIndex(i));
 			if (net) {
-				if (net->IsGnd())
-					sig.append(RTLIL::State::S0);
-				else if (net->IsPwr())
-					sig.append(RTLIL::State::S1);
+				if (net->IsConstant()) {
+					if (net->IsGnd())
+						sig.append(RTLIL::State::S0);
+					else if (net->IsPwr())
+						sig.append(RTLIL::State::S1);
+					else if (net->IsX())
+						sig.append(RTLIL::State::Sx);
+					else
+						sig.append(RTLIL::State::Sz);
+				}
 				else
 					sig.append(net_map_at(net));
 			} else
@@ -379,6 +385,36 @@ RTLIL::SigSpec VerificImporter::operatorInport(Instance *inst, const char *portn
 	}
 }
 
+RTLIL::SigSpec VerificImporter::operatorInportCase(Instance *inst, const char *portname)
+{
+	PortBus *portbus = inst->View()->GetPortBus(portname);
+	if (portbus) {
+		RTLIL::SigSpec sig;
+		for (unsigned i = 0; i < portbus->Size(); i++) {
+			Net *net = inst->GetNet(portbus->ElementAtIndex(i));
+			if (net) {
+				if (net->IsConstant()) {
+					if (net->IsGnd())
+						sig.append(RTLIL::State::S0);
+					else if (net->IsPwr())
+						sig.append(RTLIL::State::S1);
+					else
+						sig.append(RTLIL::State::Sa);
+				}
+				else
+					sig.append(net_map_at(net));
+			} else
+				sig.append(RTLIL::State::Sa);
+		}
+		return sig;
+	} else {
+		Port *port = inst->View()->GetPort(portname);
+		log_assert(port != NULL);
+		Net *net = inst->GetNet(port);
+		return net_map_at(net);
+	}
+}
+
 RTLIL::SigSpec VerificImporter::operatorOutput(Instance *inst, const pool<Net*, hash_ptr_ops> *any_all_nets)
 {
 	RTLIL::SigSpec sig;
@@ -993,7 +1029,7 @@ bool VerificImporter::import_netlist_instance_cells(Instance *inst, RTLIL::IdStr
 	{
 		RTLIL::SigSpec sig_out_val = operatorInport(inst, "out_value");
 		RTLIL::SigSpec sig_select = operatorInport(inst, "select");
-		RTLIL::SigSpec sig_select_values = operatorInport(inst, "select_values");
+		RTLIL::SigSpec sig_select_values = operatorInportCase(inst, "select_values");
 		RTLIL::SigSpec sig_data_values = operatorInport(inst, "data_values");
 		RTLIL::SigSpec sig_data_default = operatorInport(inst, "default_value");
 
diff --git a/frontends/verific/verific.h b/frontends/verific/verific.h
index d9f0077db..44485751c 100644
--- a/frontends/verific/verific.h
+++ b/frontends/verific/verific.h
@@ -87,6 +87,7 @@ struct VerificImporter
 	RTLIL::SigSpec operatorInput1(Verific::Instance *inst);
 	RTLIL::SigSpec operatorInput2(Verific::Instance *inst);
 	RTLIL::SigSpec operatorInport(Verific::Instance *inst, const char *portname);
+	RTLIL::SigSpec operatorInportCase(Verific::Instance *inst, const char *portname);
 	RTLIL::SigSpec operatorOutput(Verific::Instance *inst, const pool<Verific::Net*, hash_ptr_ops> *any_all_nets = nullptr);
 
 	bool import_netlist_instance_gates(Verific::Instance *inst, RTLIL::IdString inst_name);
-- 
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