/*
 *  yosys -- Yosys Open SYnthesis Suite
 *
 *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
 *
 *  Permission to use, copy, modify, and/or distribute this software for any
 *  purpose with or without fee is hereby granted, provided that the above
 *  copyright notice and this permission notice appear in all copies.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 */

#include "kernel/yosys.h"
#include "kernel/sigtools.h"
#include "kernel/log.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#ifndef _WIN32
#  include <unistd.h>
#  include <dirent.h>
#endif

USING_YOSYS_NAMESPACE

#ifdef YOSYS_ENABLE_VERIFIC

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Woverloaded-virtual"

#include "veri_file.h"
#include "vhdl_file.h"
#include "VeriModule.h"
#include "VhdlUnits.h"
#include "DataBase.h"
#include "Message.h"

#pragma clang diagnostic pop

#ifdef VERIFIC_NAMESPACE
using namespace Verific ;
#endif

#endif

PRIVATE_NAMESPACE_BEGIN

#ifdef YOSYS_ENABLE_VERIFIC

void msg_func(msg_type_t msg_type, const char *message_id, linefile_type linefile, const char *msg, va_list args)
{
	string message = stringf("VERIFIC-%s [%s] ",
			msg_type == VERIFIC_NONE ? "NONE" :
			msg_type == VERIFIC_ERROR ? "ERROR" :
			msg_type == VERIFIC_WARNING ? "WARNING" :
			msg_type == VERIFIC_IGNORE ? "IGNORE" :
			msg_type == VERIFIC_INFO ? "INFO" :
			msg_type == VERIFIC_COMMENT ? "COMMENT" :
			msg_type == VERIFIC_PROGRAM_ERROR ? "PROGRAM_ERROR" : "UNKNOWN", message_id);

	if (linefile)
		message += stringf("%s:%d: ", LineFile::GetFileName(linefile), LineFile::GetLineNo(linefile));

	message += vstringf(msg, args);

	if (msg_type == VERIFIC_ERROR || msg_type == VERIFIC_WARNING || msg_type == VERIFIC_PROGRAM_ERROR)
		log_warning("%s\n", message.c_str());
	else
		log("%s\n", message.c_str());
}

struct VerificImporter
{
	RTLIL::Module *module;
	std::map<Net*, RTLIL::SigBit> net_map;
	std::map<Net*, Net*> sva_posedge_map;

	void import_attributes(dict<RTLIL::IdString, RTLIL::Const> &attributes, DesignObj *obj)
	{
		MapIter mi;
		Att *attr;

		if (obj->Linefile())
			attributes["\\src"] = stringf("%s:%d", LineFile::GetFileName(obj->Linefile()), LineFile::GetLineNo(obj->Linefile()));

		// FIXME: Parse numeric attributes
		FOREACH_ATTRIBUTE(obj, mi, attr)
			attributes[RTLIL::escape_id(attr->Key())] = RTLIL::Const(std::string(attr->Value()));
	}

	RTLIL::SigSpec operatorInput(Instance *inst)
	{
		RTLIL::SigSpec sig;
		for (int i = int(inst->InputSize())-1; i >= 0; i--)
			if (inst->GetInputBit(i))
				sig.append(net_map.at(inst->GetInputBit(i)));
			else
				sig.append(RTLIL::State::Sz);
		return sig;
	}

	RTLIL::SigSpec operatorInput1(Instance *inst)
	{
		RTLIL::SigSpec sig;
		for (int i = int(inst->Input1Size())-1; i >= 0; i--)
			if (inst->GetInput1Bit(i))
				sig.append(net_map.at(inst->GetInput1Bit(i)));
			else
				sig.append(RTLIL::State::Sz);
		return sig;
	}

	RTLIL::SigSpec operatorInput2(Instance *inst)
	{
		RTLIL::SigSpec sig;
		for (int i = int(inst->Input2Size())-1; i >= 0; i--)
			if (inst->GetInput2Bit(i))
				sig.append(net_map.at(inst->GetInput2Bit(i)));
			else
				sig.append(RTLIL::State::Sz);
		return sig;
	}

	RTLIL::SigSpec operatorInport(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->IsGnd())
						sig.append(RTLIL::State::S0);
					else if (net->IsPwr())
						sig.append(RTLIL::State::S1);
					else
						sig.append(net_map.at(net));
				} else
					sig.append(RTLIL::State::Sz);
			}
			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 operatorOutput(Instance *inst)
	{
		RTLIL::SigSpec sig;
		RTLIL::Wire *dummy_wire = NULL;
		for (int i = int(inst->OutputSize())-1; i >= 0; i--)
			if (inst->GetOutputBit(i)) {
				sig.append(net_map.at(inst->GetOutputBit(i)));
				dummy_wire = NULL;
			} else {
				if (dummy_wire == NULL)
					dummy_wire = module->addWire(NEW_ID);
				else
					dummy_wire->width++;
				sig.append(RTLIL::SigSpec(dummy_wire, dummy_wire->width - 1));
			}
		return sig;
	}

	bool import_netlist_instance_gates(Instance *inst)
	{
		if (inst->Type() == PRIM_AND) {
			module->addAndGate(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_NAND) {
			RTLIL::SigSpec tmp = module->addWire(NEW_ID);
			module->addAndGate(NEW_ID, net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), tmp);
			module->addNotGate(RTLIL::escape_id(inst->Name()), tmp, net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_OR) {
			module->addOrGate(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_NOR) {
			RTLIL::SigSpec tmp = module->addWire(NEW_ID);
			module->addOrGate(NEW_ID, net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), tmp);
			module->addNotGate(RTLIL::escape_id(inst->Name()), tmp, net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_XOR) {
			module->addXorGate(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_XNOR) {
			module->addXnorGate(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_BUF) {
			module->addBufGate(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_INV) {
			module->addNotGate(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_MUX) {
			module->addMuxGate(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), net_map.at(inst->GetControl()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_TRI) {
			module->addMuxGate(RTLIL::escape_id(inst->Name()), RTLIL::State::Sz, net_map.at(inst->GetInput()), net_map.at(inst->GetControl()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_FADD)
		{
			RTLIL::SigSpec a = net_map.at(inst->GetInput1()), b = net_map.at(inst->GetInput2()), c = net_map.at(inst->GetCin());
			RTLIL::SigSpec x = inst->GetCout() ? net_map.at(inst->GetCout()) : module->addWire(NEW_ID);
			RTLIL::SigSpec y = inst->GetOutput() ? net_map.at(inst->GetOutput()) : module->addWire(NEW_ID);
			RTLIL::SigSpec tmp1 = module->addWire(NEW_ID);
			RTLIL::SigSpec tmp2 = module->addWire(NEW_ID);
			RTLIL::SigSpec tmp3 = module->addWire(NEW_ID);
			module->addXorGate(NEW_ID, a, b, tmp1);
			module->addXorGate(RTLIL::escape_id(inst->Name()), tmp1, c, y);
			module->addAndGate(NEW_ID, tmp1, c, tmp2);
			module->addAndGate(NEW_ID, a, b, tmp3);
			module->addOrGate(NEW_ID, tmp2, tmp3, x);
			return true;
		}

		if (inst->Type() == PRIM_DFFRS)
		{
			if (inst->GetSet()->IsGnd() && inst->GetReset()->IsGnd())
				module->addDffGate(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetClock()), net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()));
			else if (inst->GetSet()->IsGnd())
				module->addAdffGate(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetClock()), net_map.at(inst->GetReset()),
						net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()), false);
			else if (inst->GetReset()->IsGnd())
				module->addAdffGate(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetClock()), net_map.at(inst->GetSet()),
						net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()), true);
			else
				module->addDffsrGate(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetClock()), net_map.at(inst->GetSet()), net_map.at(inst->GetReset()),
						net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()));
			return true;
		}

		return false;
	}

	bool import_netlist_instance_cells(Instance *inst)
	{
		if (inst->Type() == PRIM_AND) {
			module->addAnd(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_NAND) {
			RTLIL::SigSpec tmp = module->addWire(NEW_ID);
			module->addAnd(NEW_ID, net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), tmp);
			module->addNot(RTLIL::escape_id(inst->Name()), tmp, net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_OR) {
			module->addOr(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_NOR) {
			RTLIL::SigSpec tmp = module->addWire(NEW_ID);
			module->addOr(NEW_ID, net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), tmp);
			module->addNot(RTLIL::escape_id(inst->Name()), tmp, net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_XOR) {
			module->addXor(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_XNOR) {
			module->addXnor(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_INV) {
			module->addNot(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_MUX) {
			module->addMux(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), net_map.at(inst->GetControl()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_TRI) {
			module->addMux(RTLIL::escape_id(inst->Name()), RTLIL::State::Sz, net_map.at(inst->GetInput()), net_map.at(inst->GetControl()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_FADD)
		{
			RTLIL::SigSpec a_plus_b = module->addWire(NEW_ID, 2);
			RTLIL::SigSpec y = inst->GetOutput() ? net_map.at(inst->GetOutput()) : module->addWire(NEW_ID);
			if (inst->GetCout())
				y.append(net_map.at(inst->GetCout()));
			module->addAdd(NEW_ID, net_map.at(inst->GetInput1()), net_map.at(inst->GetInput2()), a_plus_b);
			module->addAdd(RTLIL::escape_id(inst->Name()), a_plus_b, net_map.at(inst->GetCin()), y);
			return true;
		}

		if (inst->Type() == PRIM_DFFRS)
		{
			if (inst->GetSet()->IsGnd() && inst->GetReset()->IsGnd())
				module->addDff(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetClock()), net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()));
			else if (inst->GetSet()->IsGnd())
				module->addAdff(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetClock()), net_map.at(inst->GetReset()),
						net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()), RTLIL::State::S0);
			else if (inst->GetReset()->IsGnd())
				module->addAdff(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetClock()), net_map.at(inst->GetSet()),
						net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()), RTLIL::State::S1);
			else
				module->addDffsr(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetClock()), net_map.at(inst->GetSet()), net_map.at(inst->GetReset()),
						net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()));
			return true;
		}

		if (inst->Type() == PRIM_DLATCHRS)
		{
			if (inst->GetSet()->IsGnd() && inst->GetReset()->IsGnd())
				module->addDlatch(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetControl()), net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()));
			else
				module->addDlatchsr(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetControl()), net_map.at(inst->GetSet()), net_map.at(inst->GetReset()),
						net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()));
			return true;
		}

		#define IN  operatorInput(inst)
		#define IN1 operatorInput1(inst)
		#define IN2 operatorInput2(inst)
		#define OUT operatorOutput(inst)
		#define SIGNED inst->View()->IsSigned()

		if (inst->Type() == OPER_ADDER) {
			RTLIL::SigSpec out = OUT;
			if (inst->GetCout() != NULL)
				out.append(net_map.at(inst->GetCout()));
			if (inst->GetCin()->IsGnd()) {
				module->addAdd(RTLIL::escape_id(inst->Name()), IN1, IN2, out, SIGNED);
			} else {
				RTLIL::SigSpec tmp = module->addWire(NEW_ID, GetSize(out));
				module->addAdd(NEW_ID, IN1, IN2, tmp, SIGNED);
				module->addAdd(RTLIL::escape_id(inst->Name()), tmp, net_map.at(inst->GetCin()), out, false);
			}
			return true;
		}

		if (inst->Type() == OPER_MULTIPLIER) {
			module->addMul(RTLIL::escape_id(inst->Name()), IN1, IN2, OUT, SIGNED);
			return true;
		}

		if (inst->Type() == OPER_DIVIDER) {
			module->addDiv(RTLIL::escape_id(inst->Name()), IN1, IN2, OUT, SIGNED);
			return true;
		}

		if (inst->Type() == OPER_MODULO) {
			module->addMod(RTLIL::escape_id(inst->Name()), IN1, IN2, OUT, SIGNED);
			return true;
		}

		if (inst->Type() == OPER_REMAINDER) {
			module->addMod(RTLIL::escape_id(inst->Name()), IN1, IN2, OUT, SIGNED);
			return true;
		}

		if (inst->Type() == OPER_SHIFT_LEFT) {
			module->addShl(RTLIL::escape_id(inst->Name()), IN1, IN2, OUT, false);
			return true;
		}

		if (inst->Type() == OPER_ENABLED_DECODER) {
			RTLIL::SigSpec vec;
			vec.append(net_map.at(inst->GetControl()));
			for (unsigned i = 1; i < inst->OutputSize(); i++) {
				vec.append(RTLIL::State::S0);
			}
			module->addShl(RTLIL::escape_id(inst->Name()), vec, IN, OUT, false);
			return true;
		}

		if (inst->Type() == OPER_DECODER) {
			RTLIL::SigSpec vec;
			vec.append(RTLIL::State::S1);
			for (unsigned i = 1; i < inst->OutputSize(); i++) {
				vec.append(RTLIL::State::S0);
			}
			module->addShl(RTLIL::escape_id(inst->Name()), vec, IN, OUT, false);
			return true;
		}

		if (inst->Type() == OPER_SHIFT_RIGHT) {
			Net *net_cin = inst->GetCin();
			Net *net_a_msb = inst->GetInput1Bit(0);
			if (net_cin->IsGnd())
				module->addShr(RTLIL::escape_id(inst->Name()), IN1, IN2, OUT, false);
			else if (net_cin == net_a_msb)
				module->addSshr(RTLIL::escape_id(inst->Name()), IN1, IN2, OUT, true);
			else
				log_error("Can't import Verific OPER_SHIFT_RIGHT instance %s: carry_in is neither 0 nor msb of left input\n", inst->Name());
			return true;
		}

		if (inst->Type() == OPER_REDUCE_AND) {
			module->addReduceAnd(RTLIL::escape_id(inst->Name()), IN, net_map.at(inst->GetOutput()), SIGNED);
			return true;
		}

		if (inst->Type() == OPER_REDUCE_OR) {
			module->addReduceOr(RTLIL::escape_id(inst->Name()), IN, net_map.at(inst->GetOutput()), SIGNED);
			return true;
		}

		if (inst->Type() == OPER_REDUCE_XOR) {
			module->addReduceXor(RTLIL::escape_id(inst->Name()), IN, net_map.at(inst->GetOutput()), SIGNED);
			return true;
		}

		if (inst->Type() == OPER_REDUCE_XNOR) {
			module->addReduceXnor(RTLIL::escape_id(inst->Name()), IN, net_map.at(inst->GetOutput()), SIGNED);
			return true;
		}

		if (inst->Type() == OPER_LESSTHAN) {
			Net *net_cin = inst->GetCin();
			if (net_cin->IsGnd())
				module->addLt(RTLIL::escape_id(inst->Name()), IN1, IN2, net_map.at(inst->GetOutput()), SIGNED);
			else if (net_cin->IsPwr())
				module->addLe(RTLIL::escape_id(inst->Name()), IN1, IN2, net_map.at(inst->GetOutput()), SIGNED);
			else
				log_error("Can't import Verific OPER_LESSTHAN instance %s: carry_in is neither 0 nor 1\n", inst->Name());
			return true;
		}

		if (inst->Type() == OPER_WIDE_AND) {
			module->addAnd(RTLIL::escape_id(inst->Name()), IN1, IN2, OUT, SIGNED);
			return true;
		}

		if (inst->Type() == OPER_WIDE_OR) {
			module->addOr(RTLIL::escape_id(inst->Name()), IN1, IN2, OUT, SIGNED);
			return true;
		}

		if (inst->Type() == OPER_WIDE_XOR) {
			module->addXor(RTLIL::escape_id(inst->Name()), IN1, IN2, OUT, SIGNED);
			return true;
		}

		if (inst->Type() == OPER_WIDE_XNOR) {
			module->addXnor(RTLIL::escape_id(inst->Name()), IN1, IN2, OUT, SIGNED);
			return true;
		}

		if (inst->Type() == OPER_WIDE_BUF) {
			module->addPos(RTLIL::escape_id(inst->Name()), IN, OUT, SIGNED);
			return true;
		}

		if (inst->Type() == OPER_WIDE_INV) {
			module->addNot(RTLIL::escape_id(inst->Name()), IN, OUT, SIGNED);
			return true;
		}

		if (inst->Type() == OPER_MINUS) {
			module->addSub(RTLIL::escape_id(inst->Name()), IN1, IN2, OUT, SIGNED);
			return true;
		}

		if (inst->Type() == OPER_UMINUS) {
			module->addNeg(RTLIL::escape_id(inst->Name()), IN, OUT, SIGNED);
			return true;
		}

		if (inst->Type() == OPER_EQUAL) {
			module->addEq(RTLIL::escape_id(inst->Name()), IN1, IN2, net_map.at(inst->GetOutput()), SIGNED);
			return true;
		}

		if (inst->Type() == OPER_NEQUAL) {
			module->addNe(RTLIL::escape_id(inst->Name()), IN1, IN2, net_map.at(inst->GetOutput()), SIGNED);
			return true;
		}

		if (inst->Type() == OPER_WIDE_MUX) {
			module->addMux(RTLIL::escape_id(inst->Name()), IN1, IN2, net_map.at(inst->GetControl()), OUT);
			return true;
		}

		if (inst->Type() == OPER_WIDE_TRI) {
			module->addMux(RTLIL::escape_id(inst->Name()), RTLIL::SigSpec(RTLIL::State::Sz, inst->OutputSize()), IN, net_map.at(inst->GetControl()), OUT);
			return true;
		}

		if (inst->Type() == OPER_WIDE_DFFRS) {
			RTLIL::SigSpec sig_set = operatorInport(inst, "set");
			RTLIL::SigSpec sig_reset = operatorInport(inst, "reset");
			if (sig_set.is_fully_const() && !sig_set.as_bool() && sig_reset.is_fully_const() && !sig_reset.as_bool())
				module->addDff(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetClock()), IN, OUT);
			else
				module->addDffsr(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetClock()), sig_set, sig_reset, IN, OUT);
			return true;
		}

		#undef IN
		#undef IN1
		#undef IN2
		#undef OUT
		#undef SIGNED

		return false;
	}

	void import_netlist(RTLIL::Design *design, Netlist *nl, std::set<Netlist*> &nl_todo, bool mode_gates)
	{
		std::string module_name = nl->IsOperator() ? std::string("$verific$") + nl->Owner()->Name() : RTLIL::escape_id(nl->Owner()->Name());

		if (design->has(module_name)) {
			if (!nl->IsOperator())
				log_cmd_error("Re-definition of module `%s'.\n", nl->Owner()->Name());
			return;
		}

		module = new RTLIL::Module;
		module->name = module_name;
		design->add(module);

		log("Importing module %s.\n", RTLIL::id2cstr(module->name));

		SetIter si;
		MapIter mi, mi2;
		Port *port;
		PortBus *portbus;
		Net *net;
		NetBus *netbus;
		Instance *inst;
		PortRef *pr;

		FOREACH_PORT_OF_NETLIST(nl, mi, port)
		{
			if (port->Bus())
				continue;

			// log("  importing port %s.\n", port->Name());

			RTLIL::Wire *wire = module->addWire(RTLIL::escape_id(port->Name()));
			import_attributes(wire->attributes, port);

			wire->port_id = nl->IndexOf(port) + 1;

			if (port->GetDir() == DIR_INOUT || port->GetDir() == DIR_IN)
				wire->port_input = true;
			if (port->GetDir() == DIR_INOUT || port->GetDir() == DIR_OUT)
				wire->port_output = true;

			if (port->GetNet()) {
				net = port->GetNet();
				if (net_map.count(net) == 0)
					net_map[net] = wire;
				else if (wire->port_input)
					module->connect(net_map.at(net), wire);
				else
					module->connect(wire, net_map.at(net));
			}
		}

		FOREACH_PORTBUS_OF_NETLIST(nl, mi, portbus)
		{
			// log("  importing portbus %s.\n", portbus->Name());

			RTLIL::Wire *wire = module->addWire(RTLIL::escape_id(portbus->Name()), portbus->Size());
			wire->start_offset = min(portbus->LeftIndex(), portbus->RightIndex());
			import_attributes(wire->attributes, portbus);

			if (portbus->GetDir() == DIR_INOUT || portbus->GetDir() == DIR_IN)
				wire->port_input = true;
			if (portbus->GetDir() == DIR_INOUT || portbus->GetDir() == DIR_OUT)
				wire->port_output = true;

			for (int i = portbus->LeftIndex();; i += portbus->IsUp() ? +1 : -1) {
				if (portbus->ElementAtIndex(i) && portbus->ElementAtIndex(i)->GetNet()) {
					net = portbus->ElementAtIndex(i)->GetNet();
					RTLIL::SigBit bit(wire, i - wire->start_offset);
					if (net_map.count(net) == 0)
						net_map[net] = bit;
					else if (wire->port_input)
						module->connect(net_map.at(net), bit);
					else
						module->connect(bit, net_map.at(net));
				}
				if (i == portbus->RightIndex())
					break;
			}
		}

		module->fixup_ports();

		dict<Net*, char, hash_ptr_ops> init_nets;
		pool<Net*, hash_ptr_ops> anyconst_nets;
		pool<Net*, hash_ptr_ops> anyseq_nets;

		FOREACH_NET_OF_NETLIST(nl, mi, net)
		{
			if (net->IsRamNet())
			{
				RTLIL::Memory *memory = new RTLIL::Memory;
				memory->name = RTLIL::escape_id(net->Name());
				log_assert(module->count_id(memory->name) == 0);
				module->memories[memory->name] = memory;

				int number_of_bits = net->Size();
				int bits_in_word = number_of_bits;
				FOREACH_PORTREF_OF_NET(net, si, pr) {
					if (pr->GetInst()->Type() == OPER_READ_PORT) {
						bits_in_word = min<int>(bits_in_word, pr->GetInst()->OutputSize());
						continue;
					}
					if (pr->GetInst()->Type() == OPER_WRITE_PORT || pr->GetInst()->Type() == OPER_CLOCKED_WRITE_PORT) {
						bits_in_word = min<int>(bits_in_word, pr->GetInst()->Input2Size());
						continue;
					}
					log_error("Verific RamNet %s is connected to unsupported instance type %s (%s).\n",
							net->Name(), pr->GetInst()->View()->Owner()->Name(), pr->GetInst()->Name());
				}

				memory->width = bits_in_word;
				memory->size = number_of_bits / bits_in_word;

				const char *ascii_initdata = net->GetWideInitialValue();
				if (ascii_initdata) {
					while (*ascii_initdata != 0 && *ascii_initdata != '\'')
						ascii_initdata++;
					if (*ascii_initdata == '\'')
						ascii_initdata++;
					if (*ascii_initdata != 0) {
						log_assert(*ascii_initdata == 'b');
						ascii_initdata++;
					}
					for (int word_idx = 0; word_idx < memory->size; word_idx++) {
						Const initval = Const(State::Sx, memory->width);
						bool initval_valid = false;
						for (int bit_idx = memory->width-1; bit_idx >= 0; bit_idx--) {
							if (*ascii_initdata == 0)
								break;
							if (*ascii_initdata == '0' || *ascii_initdata == '1') {
								initval[bit_idx] = (*ascii_initdata == '0') ? State::S0 : State::S1;
								initval_valid = true;
							}
							ascii_initdata++;
						}
						if (initval_valid) {
							RTLIL::Cell *cell = module->addCell(NEW_ID, "$meminit");
							cell->parameters["\\WORDS"] = 1;
							if (net->GetOrigTypeRange()->LeftRangeBound() < net->GetOrigTypeRange()->RightRangeBound())
								cell->setPort("\\ADDR", word_idx);
							else
								cell->setPort("\\ADDR", memory->size - word_idx - 1);
							cell->setPort("\\DATA", initval);
							cell->parameters["\\MEMID"] = RTLIL::Const(memory->name.str());
							cell->parameters["\\ABITS"] = 32;
							cell->parameters["\\WIDTH"] = memory->width;
							cell->parameters["\\PRIORITY"] = RTLIL::Const(autoidx-1);
						}
					}
				}
				continue;
			}

			if (net->GetInitialValue())
				init_nets[net] = net->GetInitialValue();

			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)) {
				// log("  skipping net %s.\n", net->Name());
				continue;
			}

			if (net->Bus())
				continue;

			// log("  importing net %s.\n", net->Name());

			RTLIL::IdString wire_name = module->uniquify(RTLIL::escape_id(net->Name()));
			RTLIL::Wire *wire = module->addWire(wire_name);
			import_attributes(wire->attributes, net);

			net_map[net] = wire;
		}

		FOREACH_NETBUS_OF_NETLIST(nl, mi, netbus)
		{
			bool found_new_net = false;
			for (int i = netbus->LeftIndex();; i += netbus->IsUp() ? +1 : -1) {
				net = netbus->ElementAtIndex(i);
				if (net_map.count(net) == 0)
					found_new_net = true;
				if (i == netbus->RightIndex())
					break;
			}

			if (found_new_net)
			{
				// log("  importing netbus %s.\n", netbus->Name());

				RTLIL::IdString wire_name = module->uniquify(RTLIL::escape_id(netbus->Name()));
				RTLIL::Wire *wire = module->addWire(wire_name, netbus->Size());
				wire->start_offset = min(netbus->LeftIndex(), netbus->RightIndex());
				import_attributes(wire->attributes, netbus);

				RTLIL::Const initval = Const(State::Sx, GetSize(wire));
				bool initval_valid = false;

				for (int i = netbus->LeftIndex();; i += netbus->IsUp() ? +1 : -1)
				{
					if (netbus->ElementAtIndex(i))
					{
						int bitidx = i - wire->start_offset;
						net = netbus->ElementAtIndex(i);
						RTLIL::SigBit bit(wire, bitidx);

						if (init_nets.count(net)) {
							if (init_nets.at(net) == '0')
								initval.bits.at(bitidx) = State::S0;
							if (init_nets.at(net) == '1')
								initval.bits.at(bitidx) = State::S1;
							initval_valid = true;
							init_nets.erase(net);
						}

						if (net_map.count(net) == 0)
							net_map[net] = bit;
						else
							module->connect(bit, net_map.at(net));
					}

					if (i == netbus->RightIndex())
						break;
				}

				if (initval_valid)
					wire->attributes["\\init"] = initval;
			}
			else
			{
				// 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 it : init_nets)
		{
			Const initval;
			SigBit bit = net_map.at(it.first);
			log_assert(bit.wire);

			if (bit.wire->attributes.count("\\init"))
				initval = bit.wire->attributes.at("\\init");

			while (GetSize(initval) < GetSize(bit.wire))
				initval.bits.push_back(State::Sx);

			if (it.second == '0')
				initval.bits.at(bit.offset) = State::S0;
			if (it.second == '1')
				initval.bits.at(bit.offset) = State::S1;

			bit.wire->attributes["\\init"] = initval;
		}

		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)
		{
			if (inst->Type() == PRIM_SVA_POSEDGE) {
				Net *in_net = inst->GetInput();
				Net *out_net = inst->GetOutput();
				sva_posedge_map[out_net] = in_net;
				continue;
			}
		}

		FOREACH_INSTANCE_OF_NETLIST(nl, mi, inst)
		{
			if (inst->Type() == PRIM_SVA_POSEDGE)
				continue;

			// log("  importing cell %s (%s).\n", inst->Name(), inst->View()->Owner()->Name());

			if (inst->Type() == PRIM_SVA_AT)
			{
				Net *in1 = inst->GetInput1();
				Net *in2 = inst->GetInput2();
				Net *out = inst->GetOutput();

				if (sva_posedge_map.count(in2))
					std::swap(in1, in2);

				log_assert(sva_posedge_map.count(in1));
				Net *clk = sva_posedge_map.at(in1);

				SigBit outsig = net_map.at(out);
				log_assert(outsig.wire && GetSize(outsig.wire) == 1);
				outsig.wire->attributes["\\init"] = Const(1, 1);

				module->addDff(NEW_ID, net_map.at(clk), net_map.at(in2), net_map.at(out));
				continue;
			}

			if (inst->Type() == PRIM_SVA_IMMEDIATE_ASSERT || inst->Type() == PRIM_SVA_ASSERT) {
				Net *in = inst->GetInput();
				module->addAssert(NEW_ID, net_map.at(in), State::S1);
				continue;
			}

			if (inst->Type() == PRIM_SVA_IMMEDIATE_ASSUME || inst->Type() == PRIM_SVA_ASSUME) {
				Net *in = inst->GetInput();
				module->addAssume(NEW_ID, net_map.at(in), State::S1);
				continue;
			}

			if (inst->Type() == PRIM_SVA_IMMEDIATE_COVER || inst->Type() == PRIM_SVA_COVER) {
				Net *in = inst->GetInput();
				module->addCover(NEW_ID, net_map.at(in), State::S1);
				continue;
			}

			if (inst->Type() == PRIM_PWR) {
				module->connect(net_map.at(inst->GetOutput()), RTLIL::State::S1);
				continue;
			}

			if (inst->Type() == PRIM_GND) {
				module->connect(net_map.at(inst->GetOutput()), RTLIL::State::S0);
				continue;
			}

			if (inst->Type() == PRIM_BUF) {
				module->addBufGate(RTLIL::escape_id(inst->Name()), net_map.at(inst->GetInput()), net_map.at(inst->GetOutput()));
				continue;
			}

			if (inst->Type() == PRIM_X) {
				module->connect(net_map.at(inst->GetOutput()), RTLIL::State::Sx);
				continue;
			}

			if (inst->Type() == PRIM_Z) {
				module->connect(net_map.at(inst->GetOutput()), RTLIL::State::Sz);
				continue;
			}

			if (inst->Type() == OPER_READ_PORT)
			{
				RTLIL::Memory *memory = module->memories.at(RTLIL::escape_id(inst->GetInput()->Name()));
				if (memory->width != int(inst->OutputSize()))
					log_error("Import of asymetric memories from Verific is not supported yet: %s %s\n", inst->Name(), inst->GetInput()->Name());

				RTLIL::SigSpec addr = operatorInput1(inst);
				RTLIL::SigSpec data = operatorOutput(inst);

				RTLIL::Cell *cell = module->addCell(RTLIL::escape_id(inst->Name()), "$memrd");
				cell->parameters["\\MEMID"] = memory->name.str();
				cell->parameters["\\CLK_ENABLE"] = false;
				cell->parameters["\\CLK_POLARITY"] = true;
				cell->parameters["\\TRANSPARENT"] = false;
				cell->parameters["\\ABITS"] = GetSize(addr);
				cell->parameters["\\WIDTH"] = GetSize(data);
				cell->setPort("\\CLK", RTLIL::State::Sx);
				cell->setPort("\\EN", RTLIL::State::Sx);
				cell->setPort("\\ADDR", addr);
				cell->setPort("\\DATA", data);
				continue;
			}

			if (inst->Type() == OPER_WRITE_PORT || inst->Type() == OPER_CLOCKED_WRITE_PORT)
			{
				RTLIL::Memory *memory = module->memories.at(RTLIL::escape_id(inst->GetOutput()->Name()));
				if (memory->width != int(inst->Input2Size()))
					log_error("Import of asymetric memories from Verific is not supported yet: %s %s\n", inst->Name(), inst->GetInput()->Name());

				RTLIL::SigSpec addr = operatorInput1(inst);
				RTLIL::SigSpec data = operatorInput2(inst);

				RTLIL::Cell *cell = module->addCell(RTLIL::escape_id(inst->Name()), "$memwr");
				cell->parameters["\\MEMID"] = memory->name.str();
				cell->parameters["\\CLK_ENABLE"] = false;
				cell->parameters["\\CLK_POLARITY"] = true;
				cell->parameters["\\PRIORITY"] = 0;
				cell->parameters["\\ABITS"] = GetSize(addr);
				cell->parameters["\\WIDTH"] = GetSize(data);
				cell->setPort("\\EN", RTLIL::SigSpec(net_map.at(inst->GetControl())).repeat(GetSize(data)));
				cell->setPort("\\CLK", RTLIL::State::S0);
				cell->setPort("\\ADDR", addr);
				cell->setPort("\\DATA", data);

				if (inst->Type() == OPER_CLOCKED_WRITE_PORT) {
					cell->parameters["\\CLK_ENABLE"] = true;
					cell->setPort("\\CLK", net_map.at(inst->GetClock()));
				}
				continue;
			}

			if (!mode_gates) {
				if (import_netlist_instance_cells(inst))
					continue;
				if (inst->IsOperator())
					log_warning("Unsupported Verific operator: %s (fallback to gate level implementation provided by verific)\n", inst->View()->Owner()->Name());
			} else {
				if (import_netlist_instance_gates(inst))
					continue;
			}

			if (inst->IsPrimitive())
				log_error("Unsupported Verific primitive %s of type %s\n", inst->Name(), inst->View()->Owner()->Name());

			nl_todo.insert(inst->View());

			RTLIL::Cell *cell = module->addCell(RTLIL::escape_id(inst->Name()), inst->IsOperator() ?
					std::string("$verific$") + inst->View()->Owner()->Name() : RTLIL::escape_id(inst->View()->Owner()->Name()));

			dict<IdString, vector<SigBit>> cell_port_conns;

			FOREACH_PORTREF_OF_INST(inst, mi2, pr) {
				// log("      .%s(%s)\n", pr->GetPort()->Name(), pr->GetNet()->Name());
				const char *port_name = pr->GetPort()->Name();
				int port_offset = 0;
				if (pr->GetPort()->Bus()) {
					port_name = pr->GetPort()->Bus()->Name();
					port_offset = pr->GetPort()->Bus()->IndexOf(pr->GetPort()) -
							min(pr->GetPort()->Bus()->LeftIndex(), pr->GetPort()->Bus()->RightIndex());
				}
				IdString port_name_id = RTLIL::escape_id(port_name);
				auto &sigvec = cell_port_conns[port_name_id];
				if (GetSize(sigvec) <= port_offset) {
					SigSpec zwires = module->addWire(NEW_ID, port_offset+1-GetSize(sigvec));
					for (auto bit : zwires)
						sigvec.push_back(bit);
				}
				sigvec[port_offset] = net_map.at(pr->GetNet());
			}

			for (auto &it : cell_port_conns) {
				// log("      .%s(%s)\n", log_id(it.first), log_signal(it.second));
				cell->setPort(it.first, it.second);
			}
		}
	}
};

#endif /* YOSYS_ENABLE_VERIFIC */

struct VerificPass : public Pass {
	VerificPass() : Pass("verific", "load Verilog and VHDL designs using Verific") { }
	virtual void help()
	{
		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
		log("\n");
		log("    verific {-vlog95|-vlog2k|-sv2005|-sv2009|-sv|-vlpsl} <verilog-file>..\n");
		log("\n");
		log("Load the specified Verilog/SystemVerilog files into Verific.\n");
		log("\n");
		log("\n");
		log("    verific {-vhdl87|-vhdl93|-vhdl2k|-vhdl2008|-vhdpsl} <vhdl-file>..\n");
		log("\n");
		log("Load the specified VHDL files into Verific.\n");
		log("\n");
		log("\n");
		log("    verific -import [-gates] {-all | <top-module>..}\n");
		log("\n");
		log("Elaborate the design for the specified top modules, import to Yosys and\n");
		log("reset the internal state of Verific. A gate-level netlist is created\n");
		log("when called with -gates.\n");
		log("\n");
		log("Visit http://verific.com/ for more information on Verific.\n");
		log("\n");
	}
#ifdef YOSYS_ENABLE_VERIFIC
	virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
	{
		log_header(design, "Executing VERIFIC (loading Verilog and VHDL designs using Verific).\n");

		Message::SetConsoleOutput(0);
		Message::RegisterCallBackMsg(msg_func);

		if (args.size() > 1 && args[1] == "-vlog95") {
			for (size_t argidx = 2; argidx < args.size(); argidx++)
				if (!veri_file::Analyze(args[argidx].c_str(), veri_file::VERILOG_95))
					log_cmd_error("Reading `%s' in VERILOG_95 mode failed.\n", args[argidx].c_str());
			return;
		}

		if (args.size() > 1 && args[1] == "-vlog2k") {
			for (size_t argidx = 2; argidx < args.size(); argidx++)
				if (!veri_file::Analyze(args[argidx].c_str(), veri_file::VERILOG_2K))
					log_cmd_error("Reading `%s' in VERILOG_2K mode failed.\n", args[argidx].c_str());
			return;
		}

		if (args.size() > 1 && args[1] == "-sv2005") {
			for (size_t argidx = 2; argidx < args.size(); argidx++)
				if (!veri_file::Analyze(args[argidx].c_str(), veri_file::SYSTEM_VERILOG_2005))
					log_cmd_error("Reading `%s' in SYSTEM_VERILOG_2005 mode failed.\n", args[argidx].c_str());
			return;
		}

		if (args.size() > 1 && args[1] == "-sv2009") {
			for (size_t argidx = 2; argidx < args.size(); argidx++)
				if (!veri_file::Analyze(args[argidx].c_str(), veri_file::SYSTEM_VERILOG_2009))
					log_cmd_error("Reading `%s' in SYSTEM_VERILOG_2009 mode failed.\n", args[argidx].c_str());
			return;
		}

		if (args.size() > 1 && args[1] == "-sv") {
			for (size_t argidx = 2; argidx < args.size(); argidx++)
				if (!veri_file::Analyze(args[argidx].c_str(), veri_file::SYSTEM_VERILOG))
					log_cmd_error("Reading `%s' in SYSTEM_VERILOG mode failed.\n", args[argidx].c_str());
			return;
		}

		if (args.size() > 1 && args[1] == "-vlpsl") {
			for (size_t argidx = 2; argidx < args.size(); argidx++)
				if (!veri_file::Analyze(args[argidx].c_str(), veri_file::VERILOG_PSL))
					log_cmd_error("Reading `%s' in VERILOG_PSL mode failed.\n", args[argidx].c_str());
			return;
		}

		if (args.size() > 1 && args[1] == "-vhdl87") {
			vhdl_file::SetDefaultLibraryPath((proc_share_dirname() + "verific/vhdl_vdbs_1987").c_str());
			for (size_t argidx = 2; argidx < args.size(); argidx++)
				if (!vhdl_file::Analyze(args[argidx].c_str(), "work", vhdl_file::VHDL_87))
					log_cmd_error("Reading `%s' in VHDL_87 mode failed.\n", args[argidx].c_str());
			return;
		}

		if (args.size() > 1 && args[1] == "-vhdl93") {
			vhdl_file::SetDefaultLibraryPath((proc_share_dirname() + "verific/vhdl_vdbs_1993").c_str());
			for (size_t argidx = 2; argidx < args.size(); argidx++)
				if (!vhdl_file::Analyze(args[argidx].c_str(), "work", vhdl_file::VHDL_93))
					log_cmd_error("Reading `%s' in VHDL_93 mode failed.\n", args[argidx].c_str());
			return;
		}

		if (args.size() > 1 && args[1] == "-vhdl2k") {
			vhdl_file::SetDefaultLibraryPath((proc_share_dirname() + "verific/vhdl_vdbs_1993").c_str());
			for (size_t argidx = 2; argidx < args.size(); argidx++)
				if (!vhdl_file::Analyze(args[argidx].c_str(), "work", vhdl_file::VHDL_2K))
					log_cmd_error("Reading `%s' in VHDL_2K mode failed.\n", args[argidx].c_str());
			return;
		}

		if (args.size() > 1 && args[1] == "-vhdl2008") {
			vhdl_file::SetDefaultLibraryPath((proc_share_dirname() + "verific/vhdl_vdbs_2008").c_str());
			for (size_t argidx = 2; argidx < args.size(); argidx++)
				if (!vhdl_file::Analyze(args[argidx].c_str(), "work", vhdl_file::VHDL_2008))
					log_cmd_error("Reading `%s' in VHDL_2008 mode failed.\n", args[argidx].c_str());
			return;
		}

		if (args.size() > 1 && args[1] == "-vhdpsl") {
			vhdl_file::SetDefaultLibraryPath((proc_share_dirname() + "verific/vhdl_vdbs_2008").c_str());
			for (size_t argidx = 2; argidx < args.size(); argidx++)
				if (!vhdl_file::Analyze(args[argidx].c_str(), "work", vhdl_file::VHDL_PSL))
					log_cmd_error("Reading `%s' in VHDL_PSL mode failed.\n", args[argidx].c_str());
			return;
		}

		if (args.size() > 1 && args[1] == "-import")
		{
			std::set<Netlist*> nl_todo, nl_done;
			bool mode_all = false, mode_gates = false;

			size_t argidx = 2;
			for (; argidx < args.size(); argidx++) {
				if (args[argidx] == "-all") {
					mode_all = true;
					continue;
				}
				if (args[argidx] == "-gates") {
					mode_gates = true;
					continue;
				}
				break;
			}

			if (argidx > args.size() && args[argidx].substr(0, 1) == "-")
				cmd_error(args, argidx, "unknown option");

			if (mode_all)
			{
				if (argidx != args.size())
					log_cmd_error("Got -all and an explicit list of top modules.\n");

				MapIter m1, m2, m3;
				VeriModule *mod;
				FOREACH_VERILOG_MODULE(m1, mod)
					args.push_back(mod->Name());

				VhdlLibrary *lib;
				VhdlPrimaryUnit *primunit;
				FOREACH_VHDL_LIBRARY(m1, lib)
				FOREACH_VHDL_PRIMARY_UNIT(lib, m2, primunit) {
					if (primunit->IsPackageDecl())
						continue;
					args.push_back(primunit->Name());
				}
			}
			else
				if (argidx == args.size())
					log_cmd_error("No top module specified.\n");

			for (; argidx < args.size(); argidx++) {
				if (veri_file::GetModule(args[argidx].c_str())) {
					log("Running veri_file::Elaborate(\"%s\").\n", args[argidx].c_str());
					if (!veri_file::Elaborate(args[argidx].c_str()))
						log_cmd_error("Elaboration of top module `%s' failed.\n", args[argidx].c_str());
					nl_todo.insert(Netlist::PresentDesign());
				} else {
					log("Running vhdl_file::Elaborate(\"%s\").\n", args[argidx].c_str());
					if (!vhdl_file::Elaborate(args[argidx].c_str()))
						log_cmd_error("Elaboration of top module `%s' failed.\n", args[argidx].c_str());
					nl_todo.insert(Netlist::PresentDesign());
				}
			}

			while (!nl_todo.empty()) {
				Netlist *nl = *nl_todo.begin();
				if (nl_done.count(nl) == 0) {
					VerificImporter importer;
					importer.import_netlist(design, nl, nl_todo, mode_gates);
				}
				nl_todo.erase(nl);
				nl_done.insert(nl);
			}

			Libset::Reset();
			return;
		}

		log_cmd_error("Missing or unsupported mode parameter.\n");
	}
#else /* YOSYS_ENABLE_VERIFIC */
	virtual void execute(std::vector<std::string>, RTLIL::Design *) {
		log_cmd_error("This version of Yosys is built without Verific support.\n");
	}
#endif
} VerificPass;

PRIVATE_NAMESPACE_END