From 548f16f1dfec09c4ecfef737f31d31365bd5bc3a Mon Sep 17 00:00:00 2001
From: Matthias Koefferlein <matthias@koefferlein.de>
Date: Sat, 4 May 2019 00:37:38 +0200
Subject: [PATCH] WIP: tried to provide a more consistent net building feature
 (here: building hierarchical nets with properties as net annotation - needs
 cell variants if properties are assigned to subcells too)

---
 src/db/db/dbLayoutToNetlist.cc                |  30 ++++++++--------
 src/db/db/dbLayoutToNetlist.h                 |  33 ++++++++++++++++--
 src/db/unit_tests/dbLayoutToNetlistTests.cc   |  27 ++++++++++++++
 .../laybasic/layNetlistBrowserDialog.cc       |   2 +-
 .../algo/device_extract_au1_rebuild_pr.gds    | Bin 0 -> 29092 bytes
 5 files changed, 75 insertions(+), 17 deletions(-)
 create mode 100644 testdata/algo/device_extract_au1_rebuild_pr.gds

diff --git a/src/db/db/dbLayoutToNetlist.cc b/src/db/db/dbLayoutToNetlist.cc
index 26ab0ebca..682eb4293 100644
--- a/src/db/db/dbLayoutToNetlist.cc
+++ b/src/db/db/dbLayoutToNetlist.cc
@@ -608,16 +608,16 @@ db::Region *LayoutToNetlist::shapes_of_net (const db::Net &net, const db::Region
 }
 
 void
-LayoutToNetlist::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, db::properties_id_type netname_propid, BuildNetHierarchyMode hier_mode, 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 db::ICplxTrans &tr) const
+LayoutToNetlist::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, db::properties_id_type netname_propid, BuildNetHierarchyMode hier_mode, const char *cell_name_prefix, const char *device_cell_name_prefix, cell_reuse_table_type &reuse_table, const db::ICplxTrans &tr) const
 {
   const db::Circuit *circuit = net.circuit ();
   tl_assert (circuit != 0);
 
-  build_net_rec (circuit->cell_index (), net.cluster_id (), target, target_cell, lmap, &net, net_cell_name_prefix, netname_propid, hier_mode, cell_name_prefix, device_cell_name_prefix, cmap, tr);
+  build_net_rec (circuit->cell_index (), net.cluster_id (), target, target_cell, lmap, &net, net_cell_name_prefix, netname_propid, hier_mode, cell_name_prefix, device_cell_name_prefix, reuse_table, tr);
 }
 
 void
-LayoutToNetlist::build_net_rec (db::cell_index_type ci, size_t cid, db::Layout &target, db::Cell &tc, const std::map<unsigned int, const db::Region *> &lmap, const db::Net *net, const char *net_cell_name_prefix, db::properties_id_type netname_propid, BuildNetHierarchyMode hier_mode, const char *circuit_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 db::ICplxTrans &tr) const
+LayoutToNetlist::build_net_rec (db::cell_index_type ci, size_t cid, db::Layout &target, db::Cell &tc, const std::map<unsigned int, const db::Region *> &lmap, const db::Net *net, const char *net_cell_name_prefix, db::properties_id_type netname_propid, BuildNetHierarchyMode hier_mode, const char *circuit_cell_name_prefix, const char *device_cell_name_prefix, cell_reuse_table_type &reuse_table, const db::ICplxTrans &tr) const
 {
   db::Cell *target_cell = &tc;
 
@@ -673,8 +673,10 @@ LayoutToNetlist::build_net_rec (db::cell_index_type ci, size_t cid, db::Layout &
     db::cell_index_type subci = c->inst_cell_index ();
     size_t subcid = c->id ();
 
-    std::map<std::pair<db::cell_index_type, size_t>, db::cell_index_type>::const_iterator cm = cmap.find (std::make_pair (subci, subcid));
-    if (cm == cmap.end ()) {
+    CellReuseTableKey cmap_key (subci, netname_propid, subcid);
+
+    cell_reuse_table_type::const_iterator cm = reuse_table.find (cmap_key);
+    if (cm == reuse_table.end ()) {
 
       const char *name_prefix = 0;
       if (mp_netlist->device_abstract_by_cell_index (subci)) {
@@ -688,12 +690,12 @@ LayoutToNetlist::build_net_rec (db::cell_index_type ci, size_t cid, db::Layout &
         std::string cell_name = internal_layout ()->cell_name (subci);
 
         db::cell_index_type target_ci = target.add_cell ((std::string (name_prefix) + cell_name).c_str ());
-        cm = cmap.insert (std::make_pair (std::make_pair (subci, subcid), target_ci)).first;
+        cm = reuse_table.insert (std::make_pair (cmap_key, target_ci)).first;
 
-        build_net_rec (subci, subcid, target, target.cell (target_ci), lmap, 0, 0, netname_propid, hier_mode, circuit_cell_name_prefix, device_cell_name_prefix, cmap, tr_mag);
+        build_net_rec (subci, subcid, target, target.cell (target_ci), lmap, 0, 0, netname_propid, hier_mode, circuit_cell_name_prefix, device_cell_name_prefix, reuse_table, tr_mag);
 
       } else {
-        cm = cmap.insert (std::make_pair (std::make_pair (subci, subcid), std::numeric_limits<db::cell_index_type>::max ())).first;
+        cm = reuse_table.insert (std::make_pair (cmap_key, std::numeric_limits<db::cell_index_type>::max ())).first;
       }
 
     }
@@ -730,12 +732,12 @@ LayoutToNetlist::build_net (const db::Net &net, db::Layout &target, db::Cell &ta
     throw tl::Exception (tl::to_string (tr ("The netlist has not been extracted yet")));
   }
 
-  std::map<std::pair<db::cell_index_type, size_t>, db::cell_index_type> cell_map;
+  cell_reuse_table_type cell_reuse_table;
 
   double mag = internal_layout ()->dbu () / target.dbu ();
 
   db::properties_id_type netname_propid = make_netname_propid (target, netname_prop, net);
-  build_net_rec (net, target, target_cell, lmap, 0, netname_propid, hier_mode, cell_name_prefix, device_cell_name_prefix, cell_map, db::ICplxTrans (mag));
+  build_net_rec (net, target, target_cell, lmap, 0, netname_propid, hier_mode, cell_name_prefix, device_cell_name_prefix, cell_reuse_table, db::ICplxTrans (mag));
 }
 
 void
@@ -745,7 +747,7 @@ LayoutToNetlist::build_all_nets (const db::CellMapping &cmap, db::Layout &target
     throw tl::Exception (tl::to_string (tr ("The netlist has not been extracted yet")));
   }
 
-  std::map<std::pair<db::cell_index_type, size_t>, db::cell_index_type> cell_map;
+  cell_reuse_table_type cell_reuse_table;
   double mag = internal_layout ()->dbu () / target.dbu ();
 
   const db::Netlist *netlist = mp_netlist.get ();
@@ -767,7 +769,7 @@ LayoutToNetlist::build_all_nets (const db::CellMapping &cmap, db::Layout &target
       }
 
       db::properties_id_type netname_propid = make_netname_propid (target, netname_prop, *n);
-      build_net_rec (*n, target, target.cell (target_ci), lmap, net_cell_name_prefix, netname_propid, hier_mode, circuit_cell_name_prefix, device_cell_name_prefix, cell_map, db::ICplxTrans (mag));
+      build_net_rec (*n, target, target.cell (target_ci), lmap, net_cell_name_prefix, netname_propid, hier_mode, circuit_cell_name_prefix, device_cell_name_prefix, cell_reuse_table, db::ICplxTrans (mag));
 
     }
 
@@ -796,9 +798,9 @@ LayoutToNetlist::build_all_nets (const db::CellMapping &cmap, db::Layout &target
 
               if (net_cell_name_prefix) {
                 std::string ncn = std::string (net_cell_name_prefix) + subcircuit.expanded_name () + ":";
-                build_net_rec (*n, target, target.cell (target_ci), lmap, ncn.c_str (), netname_propid, hier_mode, circuit_cell_name_prefix, device_cell_name_prefix, cell_map, tr);
+                build_net_rec (*n, target, target.cell (target_ci), lmap, ncn.c_str (), netname_propid, hier_mode, circuit_cell_name_prefix, device_cell_name_prefix, cell_reuse_table, tr);
               } else {
-                build_net_rec (*n, target, target.cell (target_ci), lmap, net_cell_name_prefix, netname_propid, hier_mode, circuit_cell_name_prefix, device_cell_name_prefix, cell_map, tr);
+                build_net_rec (*n, target, target.cell (target_ci), lmap, net_cell_name_prefix, netname_propid, hier_mode, circuit_cell_name_prefix, device_cell_name_prefix, cell_reuse_table, tr);
               }
 
             }
diff --git a/src/db/db/dbLayoutToNetlist.h b/src/db/db/dbLayoutToNetlist.h
index fc5cabc77..fd86500ca 100644
--- a/src/db/db/dbLayoutToNetlist.h
+++ b/src/db/db/dbLayoutToNetlist.h
@@ -675,10 +675,39 @@ private:
   bool m_is_flat;
   db::DeepLayer m_dummy_layer;
 
+  struct CellReuseTableKey
+  {
+    CellReuseTableKey (db::cell_index_type _cell_index, db::properties_id_type _netname_propid, size_t _cluster_id)
+      : cell_index (_cell_index), netname_propid (_netname_propid), cluster_id (_cluster_id)
+    {
+      //  .. nothing yet ..
+    }
+
+    bool operator< (const CellReuseTableKey &other) const
+    {
+      if (cell_index != other.cell_index) {
+        return cell_index < other.cell_index;
+      }
+      if (netname_propid != other.netname_propid) {
+        return netname_propid < other.netname_propid;
+      }
+      if (cluster_id != other.cluster_id) {
+        return cluster_id < other.cluster_id;
+      }
+      return false;
+    }
+
+    db::cell_index_type cell_index;
+    db::properties_id_type netname_propid;
+    size_t cluster_id;
+  };
+
+  typedef std::map<CellReuseTableKey, db::cell_index_type> cell_reuse_table_type;
+
   void init ();
   size_t search_net (const db::ICplxTrans &trans, const db::Cell *cell, const db::local_cluster<db::PolygonRef> &test_cluster, std::vector<db::InstElement> &rev_inst_path);
-  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, db::properties_id_type netname_propid, BuildNetHierarchyMode hier_mode, 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, db::properties_id_type netname_propid, BuildNetHierarchyMode hier_mode, 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 (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, db::properties_id_type netname_propid, BuildNetHierarchyMode hier_mode, const char *cell_name_prefix, const char *device_cell_name_prefix, cell_reuse_table_type &reuse_table, 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, db::properties_id_type netname_propid, BuildNetHierarchyMode hier_mode, const char *cell_name_prefix, const char *device_cell_name_prefix, cell_reuse_table_type &reuse_table, const ICplxTrans &tr) const;
   db::DeepLayer deep_layer_of (const db::Region &region) const;
   void ensure_layout () const;
   std::string make_new_name (const std::string &stem = std::string ());
diff --git a/src/db/unit_tests/dbLayoutToNetlistTests.cc b/src/db/unit_tests/dbLayoutToNetlistTests.cc
index 9d4a39438..1c9bdc953 100644
--- a/src/db/unit_tests/dbLayoutToNetlistTests.cc
+++ b/src/db/unit_tests/dbLayoutToNetlistTests.cc
@@ -488,6 +488,33 @@ TEST(1_BasicExtraction)
     db::compare_layouts (_this, ly2, au);
   }
 
+  {
+    db::Layout ly2;
+    ly2.dbu (ly.dbu ());
+    db::Cell &top2 = ly2.cell (ly2.add_cell ("TOP"));
+
+    db::CellMapping cm = l2n.cell_mapping_into (ly2, top2, true /*with device cells*/);
+
+    std::map<unsigned int, const db::Region *> lmap;
+    lmap [ly2.insert_layer (db::LayerProperties (10, 0))] = &rpsd;
+    lmap [ly2.insert_layer (db::LayerProperties (11, 0))] = &rnsd;
+    lmap [ly2.insert_layer (db::LayerProperties (3, 0)) ] = rpoly.get ();
+    lmap [ly2.insert_layer (db::LayerProperties (4, 0)) ] = rdiff_cont.get ();
+    lmap [ly2.insert_layer (db::LayerProperties (5, 0)) ] = rpoly_cont.get ();
+    lmap [ly2.insert_layer (db::LayerProperties (6, 0)) ] = rmetal1.get ();
+    lmap [ly2.insert_layer (db::LayerProperties (7, 0)) ] = rvia1.get ();
+    lmap [ly2.insert_layer (db::LayerProperties (8, 0)) ] = rmetal2.get ();
+
+    l2n.build_all_nets (cm, ly2, lmap, 0, tl::Variant (42), db::LayoutToNetlist::BNH_SubcircuitCells, "CIRCUIT_", 0);
+
+    std::string au = tl::testsrc ();
+    au = tl::combine_path (au, "testdata");
+    au = tl::combine_path (au, "algo");
+    au = tl::combine_path (au, "device_extract_au1_rebuild_pr.gds");
+
+    db::compare_layouts (_this, ly2, au);
+  }
+
   {
     db::Layout ly2;
     ly2.dbu (ly.dbu ());
diff --git a/src/laybasic/laybasic/layNetlistBrowserDialog.cc b/src/laybasic/laybasic/layNetlistBrowserDialog.cc
index 8a72b5280..fb7e32bc6 100644
--- a/src/laybasic/laybasic/layNetlistBrowserDialog.cc
+++ b/src/laybasic/laybasic/layNetlistBrowserDialog.cc
@@ -194,7 +194,7 @@ NetlistBrowserDialog::probe_net (const db::DPoint &p, bool trace_path)
 
   db::DBox start_search_box = db::DBox (p, p).enlarged (db::DVector (l, l));
 
-  //  @@@ not used yet ..
+  //  TODO: not used yet ..
   db::DBox stop_search_box;
   if (trace_path) {
     stop_search_box = db::DBox (m_mouse_first_point, m_mouse_first_point).enlarged (db::DVector (l, l));
diff --git a/testdata/algo/device_extract_au1_rebuild_pr.gds b/testdata/algo/device_extract_au1_rebuild_pr.gds
new file mode 100644
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literal 0
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