Generalization of layout index for LayoutToNetlist

src/db/db/dbDeepShapeStore.cc

@@ -481,6 +481,25 @@ DeepShapeStore::layout_for_iter (const db::RecursiveShapeIterator &si, const db:
   }
 }
 
+void DeepShapeStore::make_layout (unsigned int layout_index, const db::RecursiveShapeIterator &si, const db::ICplxTrans &trans)
+{
+  tl_assert (m_layout_map.find (std::make_pair (si, trans)) == m_layout_map.end ());
+
+  while (m_layouts.size () <= layout_index) {
+    m_layouts.push_back (0);
+  }
+
+  m_layouts[layout_index] = new LayoutHolder (trans);
+
+  db::Layout &layout = m_layouts[layout_index]->layout;
+  layout.hier_changed_event.add (this, &DeepShapeStore::invalidate_hier);
+  if (si.layout ()) {
+    layout.dbu (si.layout ()->dbu () / trans.mag ());
+  }
+
+  m_layout_map[std::make_pair (si, trans)] = layout_index;
+}
+
 DeepLayer DeepShapeStore::create_polygon_layer (const db::RecursiveShapeIterator &si, double max_area_ratio, size_t max_vertex_count, const db::ICplxTrans &trans)
 {
   if (max_area_ratio == 0.0) {

src/db/db/dbDeepShapeStore.h

@@ -283,6 +283,14 @@ public:
    */
   std::pair<bool, DeepLayer> layer_for_flat (size_t region_id) const;
 
+  /**
+   *  @brief Creates a layout with the given iterator and transformation for the given index
+   *
+   *  This method is intended for classes that need more control over the layouts per index
+   *  (LayoutToNetlist).
+   */
+  void make_layout (unsigned int layout_index, const db::RecursiveShapeIterator &si, const db::ICplxTrans &trans = db::ICplxTrans ());
+
   /**
    *  @brief Inserts a polygon layer into the deep shape store
    *

src/db/db/dbLayoutToNetlist.cc

@@ -30,46 +30,51 @@
 namespace db
 {
 
-static const unsigned int singular_layout_index = 0;
-
 //  the iterator provides the hierarchical selection (enabling/disabling cells etc.)
 
 LayoutToNetlist::LayoutToNetlist (const db::RecursiveShapeIterator &iter)
-  : m_iter (iter), m_netlist_extracted (false), m_is_flat (false)
+  : m_iter (iter), m_layout_index (0), m_netlist_extracted (false), m_is_flat (false)
 {
   //  check the iterator
   if (iter.has_complex_region () || iter.region () != db::Box::world ()) {
     throw tl::Exception (tl::to_string (tr ("The netlist extractor cannot work on clipped layouts")));
   }
 
+  mp_internal_dss.reset (new db::DeepShapeStore ());
+  mp_dss.reset (mp_internal_dss.get ());
+
+  //  the dummy layer acts as a reference holder for the layout
+  //  NOTE: this probably can be done better
+  db::RecursiveShapeIterator empty_iter = iter;
+  empty_iter.set_layers (std::vector<unsigned int> ());
+  m_dummy_layer = dss ().create_polygon_layer (empty_iter);
+
   init ();
 }
 
 LayoutToNetlist::LayoutToNetlist (db::DeepShapeStore *dss, unsigned int layout_index)
-  : mp_dss (dss), m_netlist_extracted (false), m_is_flat (false)
+  : mp_dss (dss), m_layout_index (layout_index), m_netlist_extracted (false), m_is_flat (false)
 {
-  m_iter = db::RecursiveShapeIterator (dss->layout (layout_index), dss->initial_cell (layout_index), std::set<unsigned int> ());
+  if (dss->is_valid_layout_index (m_layout_index)) {
+    m_iter = db::RecursiveShapeIterator (dss->layout (m_layout_index), dss->initial_cell (m_layout_index), std::set<unsigned int> ());
+  }
 
   init ();
 }
 
-LayoutToNetlist::LayoutToNetlist (db::DeepShapeStore *dss)
-  : mp_dss (dss), m_netlist_extracted (false), m_is_flat (false)
-{
-  init ();
-}
-
 LayoutToNetlist::LayoutToNetlist (const std::string &topcell_name, double dbu)
   : m_iter (), m_netlist_extracted (false), m_is_flat (true)
 {
   mp_internal_dss.reset (new db::DeepShapeStore (topcell_name, dbu));
   mp_dss.reset (mp_internal_dss.get ());
+  m_layout_index = 0 ;
 
   init ();
 }
 
 LayoutToNetlist::LayoutToNetlist ()
-  : m_iter (), mp_internal_dss (new db::DeepShapeStore ()), mp_dss (mp_internal_dss.get ()), m_netlist_extracted (false), m_is_flat (false)
+  : m_iter (), mp_internal_dss (new db::DeepShapeStore ()), mp_dss (mp_internal_dss.get ()), m_layout_index (0),
+    m_netlist_extracted (false), m_is_flat (false)
 {
   init ();
 }
@@ -86,11 +91,6 @@ LayoutToNetlist::~LayoutToNetlist ()
 
 void LayoutToNetlist::init ()
 {
-  if (! mp_dss.get ()) {
-    mp_internal_dss.reset (new db::DeepShapeStore ());
-    mp_dss.reset (mp_internal_dss.get ());
-  }
-
   dss ().set_text_enlargement (1);
   dss ().set_text_property_name (tl::Variant ("LABEL"));
 }
@@ -184,7 +184,7 @@ void LayoutToNetlist::extract_devices (db::NetlistDeviceExtractor &extractor, co
   if (! mp_netlist.get ()) {
     mp_netlist.reset (new db::Netlist ());
   }
-  extractor.extract(dss (), layers, *mp_netlist, m_net_clusters);
+  extractor.extract (dss (), m_layout_index, layers, *mp_netlist, m_net_clusters);
 }
 
 void LayoutToNetlist::connect (const db::Region &l)
@@ -261,7 +261,7 @@ void LayoutToNetlist::extract_netlist (bool join_nets_by_label)
   }
 
   db::NetlistExtractor netex;
-  netex.extract_nets(dss (), m_conn, *mp_netlist, m_net_clusters, join_nets_by_label);
+  netex.extract_nets (dss (), m_layout_index, m_conn, *mp_netlist, m_net_clusters, join_nets_by_label);
 
   m_netlist_extracted = true;
 }
@@ -273,30 +273,40 @@ void LayoutToNetlist::set_netlist_extracted ()
 
 const db::Layout *LayoutToNetlist::internal_layout () const
 {
-  return &dss ().const_layout ();
+  ensure_layout ();
+  return &dss ().const_layout (m_layout_index);
 }
 
 const db::Cell *LayoutToNetlist::internal_top_cell () const
 {
-  return &dss ().const_initial_cell ();
-}
-
-void LayoutToNetlist::ensure_internal_layout ()
-{
-  if (dss ().layouts () == 0) {
-    //  the dummy layer acts as a reference holder for the layout
-    m_dummy_layer = dss ().create_polygon_layer (db::RecursiveShapeIterator ());
-  }
+  ensure_layout ();
+  return &dss ().const_initial_cell (m_layout_index);
 }
 
 db::Layout *LayoutToNetlist::internal_layout ()
 {
-  return &dss ().layout ();
+  ensure_layout ();
+  return &dss ().layout (m_layout_index);
 }
 
 db::Cell *LayoutToNetlist::internal_top_cell ()
 {
-  return &dss ().initial_cell ();
+  ensure_layout ();
+  return &dss ().initial_cell (m_layout_index);
+}
+
+void LayoutToNetlist::ensure_layout () const
+{
+  if (! dss ().is_valid_layout_index (m_layout_index)) {
+
+    LayoutToNetlist *non_const_this = const_cast<LayoutToNetlist *> (this);
+    non_const_this->dss ().make_layout (m_layout_index, db::RecursiveShapeIterator ());
+
+    //  the dummy layer acts as a reference holder for the layout
+    unsigned int dummy_layer_index = non_const_this->dss ().layout (m_layout_index).insert_layer ();
+    non_const_this->m_dummy_layer = db::DeepLayer (& non_const_this->dss (), m_layout_index, dummy_layer_index);
+
+  }
 }
 
 void LayoutToNetlist::register_layer (const db::Region &region, const std::string &n)
@@ -317,7 +327,7 @@ void LayoutToNetlist::register_layer (const db::Region &region, const std::strin
     if (! delegate) {
 
       if (region.empty ()) {
-        dl = dss ().empty_layer ();
+        dl = dss ().empty_layer (m_layout_index);
       } else {
         throw tl::Exception (tl::to_string (tr ("Layer is not a deep region and cannot be registered with name: ")) + n);
       }
@@ -394,7 +404,7 @@ db::DeepLayer LayoutToNetlist::deep_layer_of (const db::Region &region) const
       return lff.second;
     } else if (region.empty ()) {
       //  provide a substitute empty layer for empty
-      return dss ().empty_layer ();
+      return dss ().empty_layer (m_layout_index);
     } else {
       throw (tl::Exception (tl::to_string (tr ("Non-hierarchical layers cannot be used in netlist extraction"))));
     }
@@ -418,7 +428,7 @@ db::CellMapping LayoutToNetlist::cell_mapping_into (db::Layout &layout, db::Cell
     }
   }
 
-  return dss ().cell_mapping_to_original (singular_layout_index, &layout, cell.cell_index (), &device_cells);
+  return dss ().cell_mapping_to_original (m_layout_index, &layout, cell.cell_index (), &device_cells);
 }
 
 db::CellMapping LayoutToNetlist::const_cell_mapping_into (const db::Layout &layout, const db::Cell &cell)
@@ -869,10 +879,10 @@ db::Region LayoutToNetlist::antenna_check (const db::Region &gate, const db::Reg
     throw tl::Exception (tl::to_string (tr ("The netlist has not been extracted yet")));
   }
 
-  db::Layout &ly = dss ().layout ();
+  db::Layout &ly = dss ().layout (m_layout_index);
   double dbu = ly.dbu ();
 
-  db::DeepLayer dl (&dss (), singular_layout_index, ly.insert_layer ());
+  db::DeepLayer dl (&dss (), m_layout_index, ly.insert_layer ());
 
   for (db::Layout::bottom_up_const_iterator cid = ly.begin_bottom_up (); cid != ly.end_bottom_up (); ++cid) {
 

src/db/db/dbLayoutToNetlist.h

@@ -93,20 +93,7 @@ public:
    *  NOTE: if using make_layer, these new layers will be created in the DSS
    *  given in this constructor.
    */
-  LayoutToNetlist (db::DeepShapeStore *dss, unsigned int layout_index);
-
-  /**
-   *  @brief Alternative constructor using an external deep shape storage
-   *
-   *  This constructor allows using an external DSS. It's intended to be used
-   *  with existing DSS instances. Existing layers can be registered with
-   *  "register_layer". The LayoutToNetlist object will hold a weak reference
-   *  to the DSS but not own the DSS.
-   *
-   *  NOTE: this version cannot create layers but just register layers
-   *  which are present inside the DSS given as the argument.
-   */
-  LayoutToNetlist (db::DeepShapeStore *dss);
+  LayoutToNetlist (db::DeepShapeStore *dss, unsigned int layout_index = 0);
 
   /**
    *  @brief Alternative constructor for flat mode
@@ -338,11 +325,6 @@ public:
    */
   db::Cell *internal_top_cell ();
 
-  /**
-   *  @brief Ensures the internal layout is made
-   */
-  void ensure_internal_layout ();
-
   /**
    *  @brief Gets the connectivity object
    */
@@ -533,6 +515,7 @@ private:
   db::RecursiveShapeIterator m_iter;
   std::auto_ptr<db::DeepShapeStore> mp_internal_dss;
   tl::weak_ptr<db::DeepShapeStore> mp_dss;
+  unsigned int m_layout_index;
   db::Connectivity m_conn;
   db::hier_clusters<db::PolygonRef> m_net_clusters;
   std::auto_ptr<db::Netlist> mp_netlist;
@@ -560,6 +543,7 @@ private:
   void build_net_rec (const db::Net &net, db::Layout &target, db::Cell &target_cell, const std::map<unsigned int, const db::Region *> &lmap, const char *net_cell_name_prefix, const char *cell_name_prefix, const char *device_cell_name_prefix, std::map<std::pair<db::cell_index_type, size_t>, db::cell_index_type> &cmap, const ICplxTrans &tr) const;
   void build_net_rec (db::cell_index_type ci, size_t cid, db::Layout &target, db::Cell &target_cell, const std::map<unsigned int, const db::Region *> &lmap, const Net *net, const char *net_cell_name_prefix, const char *cell_name_prefix, const char *device_cell_name_prefix, std::map<std::pair<db::cell_index_type, size_t>, db::cell_index_type> &cmap, const ICplxTrans &tr) const;
   db::DeepLayer deep_layer_of (const db::Region &region) const;
+  void ensure_layout () const;
 };
 
 }

src/db/db/dbLayoutToNetlistReader.cc

@@ -159,8 +159,6 @@ void LayoutToNetlistStandardReader::do_read (db::LayoutToNetlist *l2n)
   int version = 0;
   std::string description;
 
-  //  TODO: there probably is a more efficient way to force the layout inside l2n to be made
-  l2n->ensure_internal_layout ();
   tl_assert (l2n->internal_layout ());
   l2n->internal_layout ()->dbu (1.0); //  mainly for testing
 

src/db/db/dbNetlistDeviceExtractor.cc

@@ -123,7 +123,7 @@ static void insert_into_region (const db::PolygonRef &s, const db::ICplxTrans &t
   region.insert (s.obj ().transformed (tr * db::ICplxTrans (s.trans ())));
 }
 
-void NetlistDeviceExtractor::extract (db::DeepShapeStore &dss, const NetlistDeviceExtractor::input_layers &layer_map, db::Netlist &nl, hier_clusters_type &clusters)
+void NetlistDeviceExtractor::extract (db::DeepShapeStore &dss, unsigned int layout_index, const NetlistDeviceExtractor::input_layers &layer_map, db::Netlist &nl, hier_clusters_type &clusters)
 {
   initialize (&nl);
 
@@ -147,14 +147,14 @@ void NetlistDeviceExtractor::extract (db::DeepShapeStore &dss, const NetlistDevi
         layers.push_back (alias.second.layer ());
       } else if (l->second->empty ()) {
         //  provide a substitute empty layer
-        layers.push_back (dss.empty_layer ().layer ());
+        layers.push_back (dss.empty_layer (layout_index).layer ());
       } else {
         throw tl::Exception (tl::sprintf (tl::to_string (tr ("Invalid region passed to input layer '%s' for device extraction: must be of deep region kind")), ld->name));
       }
 
     } else {
 
-      if (&dr->deep_layer ().layout () != &dss.layout () || &dr->deep_layer ().initial_cell () != &dss.initial_cell ()) {
+      if (&dr->deep_layer ().layout () != &dss.layout (layout_index) || &dr->deep_layer ().initial_cell () != &dss.initial_cell (layout_index)) {
         throw tl::Exception (tl::sprintf (tl::to_string (tr ("Invalid region passed to input layer '%s' for device extraction: not originating from the same source")), ld->name));
       }
 
@@ -164,7 +164,7 @@ void NetlistDeviceExtractor::extract (db::DeepShapeStore &dss, const NetlistDevi
 
   }
 
-  extract_without_initialize (dss.layout (), dss.initial_cell (), clusters, layers);
+  extract_without_initialize (dss.layout (layout_index), dss.initial_cell (layout_index), clusters, layers);
 }
 
 void NetlistDeviceExtractor::extract (db::Layout &layout, db::Cell &cell, const std::vector<unsigned int> &layers, db::Netlist *nl, hier_clusters_type &clusters)

src/db/db/dbNetlistDeviceExtractor.h

@@ -266,7 +266,7 @@ public:
    *  named regions for input. These regions need to be of deep region type and
    *  originate from the same layout than the DeepShapeStore.
    */
-  void extract (DeepShapeStore &dss, const input_layers &layers, Netlist &netlist, hier_clusters_type &clusters);
+  void extract (DeepShapeStore &dss, unsigned int layout_index, const input_layers &layers, Netlist &netlist, hier_clusters_type &clusters);
 
   /**
    *  @brief Gets the error iterator, begin

src/db/db/dbNetlistExtractor.cc

@@ -58,11 +58,11 @@ build_net_name_equivalence (const db::Layout *layout, db::property_names_id_type
 }
 
 void
-NetlistExtractor::extract_nets (const db::DeepShapeStore &dss, const db::Connectivity &conn, db::Netlist &nl, hier_clusters_type &clusters, bool join_nets_by_label)
+NetlistExtractor::extract_nets (const db::DeepShapeStore &dss, unsigned int layout_index, const db::Connectivity &conn, db::Netlist &nl, hier_clusters_type &clusters, bool join_nets_by_label)
 {
   mp_clusters = &clusters;
-  mp_layout = &dss.const_layout ();
-  mp_cell = &dss.const_initial_cell ();
+  mp_layout = &dss.const_layout (layout_index);
+  mp_cell = &dss.const_initial_cell (layout_index);
 
   //  gets the text annotation property ID -
   //  this is how the texts are passed for annotating the net names

src/db/db/dbNetlistExtractor.h

@@ -82,7 +82,7 @@ public:
    *  @brief Extract the nets
    *  See the class description for more details.
    */
-  void extract_nets (const db::DeepShapeStore &dss, const db::Connectivity &conn, db::Netlist &nl, hier_clusters_type &clusters, bool join_nets_by_label = true);
+  void extract_nets (const db::DeepShapeStore &dss, unsigned int layout_index, const db::Connectivity &conn, db::Netlist &nl, hier_clusters_type &clusters, bool join_nets_by_label = true);
 
 private:
   hier_clusters_type *mp_clusters;

src/db/unit_tests/dbNetlistExtractorTests.cc

@@ -218,12 +218,12 @@ TEST(1_DeviceAndNetExtraction)
   dl["SD"] = &rpsd;
   dl["G"] = &rpgate;
   dl["P"] = &rpoly;  //  not needed for extraction but to return terminal shapes
-  pmos_ex.extract (dss, dl, nl, cl);
+  pmos_ex.extract (dss, 0, dl, nl, cl);
 
   dl["SD"] = &rnsd;
   dl["G"] = &rngate;
   dl["P"] = &rpoly;  //  not needed for extraction but to return terminal shapes
-  nmos_ex.extract (dss, dl, nl, cl);
+  nmos_ex.extract (dss, 0, dl, nl, cl);
 
   //  perform the net extraction
 
@@ -253,7 +253,7 @@ TEST(1_DeviceAndNetExtraction)
 
   //  extract the nets
 
-  net_ex.extract_nets (dss, conn, nl, cl);
+  net_ex.extract_nets (dss, 0, conn, nl, cl);
 
   //  debug layers produced for nets
   //    202/0 -> Active
@@ -430,12 +430,12 @@ TEST(2_DeviceAndNetExtractionFlat)
   dl["SD"] = &rpsd;
   dl["G"] = &rpgate;
   dl["P"] = &rpoly;  //  not needed for extraction but to return terminal shapes
-  pmos_ex.extract (dss, dl, nl, cl);
+  pmos_ex.extract (dss, 0, dl, nl, cl);
 
   dl["SD"] = &rnsd;
   dl["G"] = &rngate;
   dl["P"] = &rpoly;  //  not needed for extraction but to return terminal shapes
-  nmos_ex.extract (dss, dl, nl, cl);
+  nmos_ex.extract (dss, 0, dl, nl, cl);
 
   //  perform the net extraction
 
@@ -466,7 +466,7 @@ TEST(2_DeviceAndNetExtractionFlat)
   //  extract the nets
 
   //  don't use "join_nets_by_label" because the flattened texts will spoil everything
-  net_ex.extract_nets (dss, conn, nl, cl, false);
+  net_ex.extract_nets (dss, 0, conn, nl, cl, false);
 
   //  debug layers produced for nets
   //    202/0 -> Active
@@ -664,12 +664,12 @@ TEST(3_DeviceAndNetExtractionWithImplicitConnections)
   dl["SD"] = &rpsd;
   dl["G"] = &rpgate;
   dl["P"] = &rpoly;  //  not needed for extraction but to return terminal shapes
-  pmos_ex.extract (dss, dl, nl, cl);
+  pmos_ex.extract (dss, 0, dl, nl, cl);
 
   dl["SD"] = &rnsd;
   dl["G"] = &rngate;
   dl["P"] = &rpoly;  //  not needed for extraction but to return terminal shapes
-  nmos_ex.extract (dss, dl, nl, cl);
+  nmos_ex.extract (dss, 0, dl, nl, cl);
 
   //  perform the net extraction
 
@@ -699,7 +699,7 @@ TEST(3_DeviceAndNetExtractionWithImplicitConnections)
 
   //  extract the nets
 
-  net_ex.extract_nets (dss, conn, nl, cl);
+  net_ex.extract_nets (dss, 0, conn, nl, cl);
 
   EXPECT_EQ (all_net_names_unique (nl), true);
 

src/drc/drc/built-in-macros/drc.lym

@@ -3772,7 +3772,7 @@ CODE
     # Multiple diode specifications are allowed. Just add them 
     # to the antenna_check call.
     #
-    # The error shapes produced by the antenna check are a copy
+    # The error shapes produced by the antenna check are copies
     # of the metal shapes on the metal layers of each network 
     # violating the antenna rule.