Method buildNetlist

openparf/database/placedb.cpp:514–580

}

void PlaceDB::buildNetlist() {
  auto const &design          = db_->design();
  auto const &layout          = db_->layout();
  auto        top_module_inst = design.topModuleInst();
  openparfAssert(top_module_inst);
  // assume flat netlist for now
  auto const &netlist = top_module_inst->netlist();

  // sort instances
  sortInstsByPlaceStatus();

  // initialize netlist information

  // build inst_pins_ and pin2inst_
  inst_pins_.reserve(netlist.numInsts(), netlist.numPins());
  pin2inst_.resize(netlist.numPins());
  IndexType count = 0;
  // must traverse in new order
  for (auto inst_id : new2old_inst_ids_) {
    auto const &inst = netlist.inst(inst_id);
    inst_pins_.pushBackIndexBegin(count);
    for (auto const &pin_id : inst.pinIds()) {
      inst_pins_.pushBack(pin_id);
      // must convert to new ids
      pin2inst_.at(pin_id) = newInstId(inst.id());
      ++count;
    }
  }

  // build net_pins_ and pin2net_
  net_pins_.reserve(netlist.numNets(), netlist.numPins());
  pin2net_.resize(netlist.numPins());
  count = 0;
  for (auto const &net_id : netlist.netIds()) {
    auto const &net = netlist.net(net_id);
    net_pins_.pushBackIndexBegin(count);
    for (auto const &pin_id : net.pinIds()) {
      net_pins_.pushBack(pin_id);
      pin2net_.at(pin_id) = net.id();
      ++count;
    }
  }

  // check if have one-pin net
  for (auto const &net_id : netlist.netIds()) {
    auto const &net = netlist.net(net_id);
    if (net.pinIds().size() == 1) {
      openparfPrint(kWarn, "Net %s have only one pins.\n", net.attr().name().c_str());
    }
  }

  // initialize inst_id and inst name mapping
  IndexType newId = 0;
  for (auto inst_id : new2old_inst_ids_) {
    auto const &inst = netlist.inst(inst_id);
    auto       &n    = inst.attr().name();
    openparfAssert(name_to_inst.find(n) == name_to_inst.end());
    name_to_inst.insert({n, newId});