Merge pull request #8814 from gadfort/pad-breakout-placer

pad: move pad placement code into separate set of classes

Author: maliberty

src/pad/BUILD

@@ -15,6 +15,8 @@ cc_library(
     srcs = [
         "src/ICeWall.cpp",
         "src/MakeICeWall.cpp",
+        "src/PadPlacer.cpp",
+        "src/PadPlacer.h",
         "src/RDLGui.cpp",
         "src/RDLGui.h",
         "src/RDLRoute.cpp",

src/pad/CMakeLists.txt

@@ -16,6 +16,7 @@ target_sources(pad
   PRIVATE
     src/MakeICeWall.cpp
     src/ICeWall.cpp
+    src/PadPlacer.cpp
     src/RDLRouter.cpp
     src/RDLRoute.cpp
     src/RDLGui.cpp

src/pad/include/pad/ICeWall.h

@@ -110,19 +110,11 @@ class ICeWall
 
  private:
   odb::dbBlock* getBlock() const;
-  int snapToRowSite(odb::dbRow* row, int location) const;
 
   std::vector<odb::dbRow*> getRows() const;
   std::vector<odb::dbInst*> getPadInstsInRow(odb::dbRow* row) const;
   std::vector<odb::dbInst*> getPadInsts() const;
 
-  int placeInstance(odb::dbRow* row,
-                    int index,
-                    odb::dbInst* inst,
-                    const odb::dbOrientType& base_orient,
-                    bool allow_overlap = false,
-                    bool allow_shift = false) const;
-
   void makeBTerm(odb::dbNet* net,
                  odb::dbTechLayer* layer,
                  const odb::Rect& shape) const;
@@ -138,43 +130,6 @@ class ICeWall
   std::string getRowName(const std::string& name, int ring_index) const;
   odb::Direction2D::Value getRowEdge(odb::dbRow* row) const;
 
-  int64_t estimateWirelengths(odb::dbInst* inst,
-                              const std::set<odb::dbITerm*>& iterms) const;
-  int64_t computePadBumpDistance(odb::dbInst* inst,
-                                 int inst_width,
-                                 odb::dbITerm* bump,
-                                 odb::dbRow* row,
-                                 int center_pos) const;
-  void placePadsUniform(const std::vector<odb::dbInst*>& insts,
-                        odb::dbRow* row,
-                        const std::map<odb::dbInst*, int>& inst_widths,
-                        int pads_width,
-                        int row_width,
-                        int row_start) const;
-  void placePadsBumpAligned(
-      const std::vector<odb::dbInst*>& insts,
-      odb::dbRow* row,
-      const std::map<odb::dbInst*, int>& inst_widths,
-      int pads_width,
-      int row_width,
-      int row_start,
-      const std::map<odb::dbInst*, std::set<odb::dbITerm*>>& iterm_connections)
-      const;
-  std::map<odb::dbInst*, odb::dbITerm*> getBumpAlignmentGroup(
-      odb::dbRow* row,
-      int offset,
-      const std::map<odb::dbInst*, int>& inst_widths,
-      const std::map<odb::dbInst*, std::set<odb::dbITerm*>>& iterm_connections,
-      const std::vector<odb::dbInst*>::const_iterator& itr,
-      const std::vector<odb::dbInst*>::const_iterator& inst_end) const;
-  void performPadFlip(odb::dbRow* row,
-                      odb::dbInst* inst,
-                      const std::map<odb::dbInst*, std::set<odb::dbITerm*>>&
-                          iterm_connections) const;
-  std::optional<std::pair<odb::dbInst*, odb::Rect>> checkInstancePlacement(
-      odb::dbInst* inst,
-      odb::dbRow* row) const;
-
   // Data members
   odb::dbDatabase* db_ = nullptr;
   utl::Logger* logger_ = nullptr;