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WIP: refinement of device extraction algorithm

This commit is contained in:
Matthias Koefferlein 2018-12-25 02:17:41 +01:00
parent 97a1abb73f
commit 33e2fb8dc1
1 changed files with 29 additions and 5 deletions
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34
src/db/db/dbNetlistDeviceExtractor.cc
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@ -46,6 +46,7 @@ void NetlistDeviceExtractor::initialize (db::Netlist *nl)
m_device_name_index = 0;
m_propname_id = 0;
m_netlist.reset (nl);
create_device_classes ();
}
@ -60,32 +61,54 @@ void NetlistDeviceExtractor::extract (db::Layout &layout, db::Cell &cell, const
db::ShapeIterator::flags_type shape_iter_flags = db::ShapeIterator::Polygons;
mp_layout = &layout;
// port properties are kept in property index 0
m_propname_id = mp_layout->properties_repository ().prop_name_id (tl::Variant (int (0)));
tl_assert (m_netlist.get () != 0);
// build a cell-id-to-circuit lookup table
std::map<db::cell_index_type, db::Circuit *> circuits_by_cell;
for (db::Netlist::circuit_iterator c = m_netlist->begin_circuits (); c != m_netlist->end_circuits (); ++c) {
circuits_by_cell.insert (std::make_pair (c->cell_index (), c.operator-> ()));
}
// collect the cells below the top cell
std::set<db::cell_index_type> called_cells;
called_cells.insert (cell.cell_index ());
cell.collect_called_cells (called_cells);
// build the device clusters
db::Connectivity device_conn = get_connectivity (layout, layers);
db::hier_clusters<shape_type> device_clusters;
device_clusters.build (layout, cell, shape_iter_flags, device_conn);
// for each cell investigate the clusters
for (std::set<db::cell_index_type>::const_iterator ci = called_cells.begin (); ci != called_cells.end (); ++ci) {
m_cell_index = *ci;
mp_circuit = new db::Circuit ();
mp_circuit->set_cell_index (*ci);
mp_circuit->set_name (layout.cell_name (*ci));
m_netlist->add_circuit (mp_circuit);
std::map<db::cell_index_type, db::Circuit *>::const_iterator c2c = circuits_by_cell.find (*ci);
if (c2c != circuits_by_cell.end ()) {
// reuse existing circuit
mp_circuit = c2c->second;
} else {
// create a new circuit for this cell
mp_circuit = new db::Circuit ();
mp_circuit->set_cell_index (*ci);
mp_circuit->set_name (layout.cell_name (*ci));
m_netlist->add_circuit (mp_circuit);
}
// investigate each cluster
db::connected_clusters<shape_type> cc = device_clusters.clusters_per_cell (*ci);
for (db::connected_clusters<shape_type>::all_iterator c = cc.begin_all (); !c.at_end(); ++c) {
// take only root clusters - others have upward connections and are not "whole"
if (! cc.is_root (*c)) {
continue;
}
@ -102,6 +125,7 @@ void NetlistDeviceExtractor::extract (db::Layout &layout, db::Cell &cell, const
}
}
// do the actual device extraction
extract_devices (layer_geometry);
}