WIP: test for multimapping in LEF/DEF

src/db/db/dbCommonReader.cc

@@ -32,34 +32,6 @@ namespace db
 // ---------------------------------------------------------------
 //  Common reader implementation
 
-DB_PUBLIC void
-join_layer_names (std::string &s, const std::string &n)
-{
-  if (s == n) {
-    return;
-  }
-
-  if (! s.empty ()) {
-
-    size_t i = s.find (n);
-    if (i != std::string::npos && (i == 0 || s.c_str ()[i - 1] == ';')) {
-      char after = s.c_str ()[i + n.size ()];
-      if (after == 0 || after == ';') {
-        //  n is already contained in s
-        return;
-      }
-    }
-
-    s += ";";
-
-  }
-
-  s += n;
-}
-
-// ---------------------------------------------------------------
-//  Common reader implementation
-
 static const size_t null_id = std::numeric_limits<size_t>::max ();
 
 CommonReader::CommonReader ()

src/db/db/dbCommonReader.h

@@ -31,9 +31,6 @@
 namespace db
 {
 
-DB_PUBLIC void
-join_layer_names (std::string &s, const std::string &n);
-
 /**
  *  @brief The CellConflictResolution enum
  */

src/db/db/dbReader.cc

@@ -30,6 +30,33 @@
 namespace db
 {
 
+// ---------------------------------------------------------------
+
+DB_PUBLIC void
+join_layer_names (std::string &s, const std::string &n)
+{
+  if (s == n) {
+    return;
+  }
+
+  if (! s.empty ()) {
+
+    size_t i = s.find (n);
+    if (i != std::string::npos && (i == 0 || s.c_str ()[i - 1] == ';')) {
+      char after = s.c_str ()[i + n.size ()];
+      if (after == 0 || after == ';') {
+        //  n is already contained in s
+        return;
+      }
+    }
+
+    s += ";";
+
+  }
+
+  s += n;
+}
+
 // ---------------------------------------------------------------
 //  ReaderBase implementation
 

src/db/db/dbReader.h

@@ -54,6 +54,14 @@ public:
   { }
 };
 
+/**
+ *  @brief Joins layer names into a single, combined layer
+ *  @param s The first layer name and output
+ *  @param n The name to add
+ */
+DB_PUBLIC void
+join_layer_names (std::string &s, const std::string &n);
+
 /**
  *  @brief The generic reader base class
  */

src/plugins/streamers/lefdef/db_plugin/dbLEFDEFImporter.cc

@@ -1359,18 +1359,22 @@ std::set<unsigned int> LEFDEFReaderState::open_layer_uncached(db::Layout &layout
         }
       }
 
-      bool found = false;
+      int lfound = -1;
       if (lp_new.layer >= 0 && lp_new.datatype >= 0) {
-        for (db::Layout::layer_iterator i = layout.begin_layers (); i != layout.end_layers () && ! found; ++i) {
+        for (db::Layout::layer_iterator i = layout.begin_layers (); i != layout.end_layers () && lfound < 0; ++i) {
           if ((*i).second->log_equal (lp_new)) {
-            found = true;
-            res.insert ((*i).first);
+            lfound = int ((*i).first);
           }
         }
       }
 
-      if (! found) {
+      if (lfound < 0) {
         res.insert (layout.insert_layer (lp_new));
+      } else {
+        res.insert ((unsigned int) lfound);
+        db::LayerProperties lp_org = layout.get_properties ((unsigned int) lfound);
+        join_layer_names (lp_org.name, name);
+        layout.set_properties ((unsigned int) lfound, lp_org);
       }
 
       if (l == ll.end ()) {

src/plugins/streamers/lefdef/unit_tests/dbLEFDEFImportTests.cc

@@ -724,6 +724,24 @@ TEST(118_density)
   run_test (_this, "density", "read:in.lef", "au.oas.gz", default_options (), false);
 }
 
+TEST(119_multimapping)
+{
+  db::LEFDEFReaderOptions options = default_options ();
+  db::LayerMap lm = db::LayerMap::from_string_file_format ("(M1:1/0)\n(M2:3/0)\n+(M1:100/0)\n+(M2:100/0)\n(VIA1:2/0)");
+  options.set_layer_map (lm);
+
+  db::LayerMap lm_read = run_test (_this, "multimap", "def:test.def", "au.oas.gz", options, false);
+  EXPECT_EQ (lm_read.to_string (),
+    "layer_map("
+      "'OUTLINE : OUTLINE (4/0)';"
+      "'+M1.VIA : M1 (1/0)';"
+      "'+M1.VIA;M2.VIA : \\'M1;M2\\' (100/0)';"
+      "'+M2.VIA : M2 (3/0)';"
+      "'VIA1.VIA : VIA1 (2/0)'"
+    ")"
+  )
+}
+
 TEST(200_lefdef_plugin)
 {
   db::Layout ly;

testdata/lefdef/multimap/test.def

@@ -0,0 +1,28 @@
+
+VERSION 5.8 ;
+DIVIDERCHAR "/" ;
+BUSBITCHARS "[]" ;
+DESIGN chip_top ;
+UNITS DISTANCE MICRONS 1000 ;
+DIEAREA ( 30000 3000 ) ( 10000000 4000 ) ;
+VIAS 1 ;
+ - VIA1_dummy
+   + RECT M1 ( -200 -140 ) ( 200 140 )
+   + RECT VIA1 ( -100 -100 ) ( 100 100 )
+   + RECT M2 ( -300 -120 ) ( 300 120 ) ;
+END VIAS
+SPECIALNETS 1 ;
+- dummy
+   + ROUTED M1 150 + SHAPE IOWIRE ( 40000 3600 ) VIA1_dummy DO 16000 BY 1 STEP 700 0
+;
+END SPECIALNETS
+SCANCHAINS 77 ;
+- chain1_clock1
++ PARTITION clock1
++ START block1/bsr_reg_0 Q
++ FLOATING
+block1/pgm_cgm_en_reg_reg ( IN SD ) ( OUT QZ )
+block1/start_reset_dd_reg ( IN SD ) ( OUT QZ )
++ STOP block1/start_reset_d_reg SD ;
+END SCANCHAINS
+END DESIGN