From 248704c61c7743e041ae791a5b8877f7294df459 Mon Sep 17 00:00:00 2001
From: Jean-Paul Chaput <Jean-Paul.Chaput@lip6.fr>
Date: Thu, 11 Aug 2016 11:05:11 +0200
Subject: [PATCH] Anabatic transient commit 17. Ripup long wires only.

---
 anabatic/src/Edge.cpp        | 19 +++++++++++++++++++
 anabatic/src/GlobalRoute.cpp | 18 ++++++++++--------
 anabatic/src/anabatic/Edge.h |  1 +
 3 files changed, 30 insertions(+), 8 deletions(-)

diff --git a/anabatic/src/Edge.cpp b/anabatic/src/Edge.cpp
index 7b07d390..68b50c7a 100644
--- a/anabatic/src/Edge.cpp
+++ b/anabatic/src/Edge.cpp
@@ -223,6 +223,25 @@ namespace Anabatic {
   }
 
 
+  size_t  Edge::ripup ()
+  {
+    AnabaticEngine* anabatic        = getAnabatic();
+    DbU::Unit       globalThreshold = Session::getSliceHeight()*3;
+    size_t          netCount        = 0;
+
+    for ( size_t i=0 ; i<_segments.size(); ) {
+      if (_segments[i]->getLength() >= globalThreshold) {
+        NetData* netData = anabatic->getNetData( _segments[i]->getNet() );
+        if (netData->isGlobalRouted()) ++netCount;
+
+        anabatic->ripup( _segments[i], Flags::Propagate );
+      } else
+        ++i;
+    }
+    return netCount;
+  }
+
+
   void  Edge::_setSource ( GCell* source )
   {
     if (source == _target)
diff --git a/anabatic/src/GlobalRoute.cpp b/anabatic/src/GlobalRoute.cpp
index 4a366524..137d4a98 100644
--- a/anabatic/src/GlobalRoute.cpp
+++ b/anabatic/src/GlobalRoute.cpp
@@ -191,15 +191,17 @@ namespace Anabatic {
       for ( Edge* edge : ovEdges ) computeNextHCost( edge, edgeHInc );
 
       netCount = 0;
-      while ( not ovEdges.empty() ) {
-        Edge*   ovEdge = ovEdges[0];
+      size_t iEdge = 0;
+      while ( iEdge < ovEdges.size() ) {
+        Edge* edge = ovEdges[iEdge];
+        netCount += edge->ripup();
 
-        vector<Segment*> segments = ovEdge->getSegments();
-        for ( Segment* segment : segments ) {
-          NetData* netData = getNetData( segment->getNet() );
-          if (netData->isGlobalRouted()) ++netCount;
-
-          ripup( segment, Flags::Propagate );
+        if (ovEdges[iEdge] == edge) {
+          cerr << Error( "AnabaticEngine::globalRoute(): Unable to ripup enough segments of edge:\n"
+                         "        %s"
+                       , getString(edge).c_str()
+                       ) << endl;
+          ++iEdge;
         }
       }
 
diff --git a/anabatic/src/anabatic/Edge.h b/anabatic/src/anabatic/Edge.h
index 912f8c34..3f440b74 100644
--- a/anabatic/src/anabatic/Edge.h
+++ b/anabatic/src/anabatic/Edge.h
@@ -79,6 +79,7 @@ namespace Anabatic {
                     void              add                  ( Segment* );
                     void              remove               ( Segment* );
                     void              replace              ( Segment* orig, Segment* repl );
+                    size_t            ripup                ();
       inline const  Flags&            flags                () const;
       inline        Flags&            flags                ();
       inline        void              revalidate           () const;