Version abc80130_2

1 files changed, 527 insertions, 45 deletions

diff --git a/src/base/io/ioWriteDot.c b/src/base/io/ioWriteDot.c
index 97258c81..8ae3cc42 100644
--- a/src/base/io/ioWriteDot.c
+++ b/src/base/io/ioWriteDot.c
@@ -19,18 +19,23 @@
 ***********************************************************************/
 
 #include "io.h"
+#include "main.h"
+#include "mio.h"
 
 ////////////////////////////////////////////////////////////////////////
 ///                        DECLARATIONS                              ///
 ////////////////////////////////////////////////////////////////////////
 
+static char * Abc_NtkPrintSop( char * pSop );
+static int    Abc_NtkCountLogicNodes( Vec_Ptr_t * vNodes );
+
 ////////////////////////////////////////////////////////////////////////
-///                     FUNCTION DEFITIONS                           ///
+///                     FUNCTION DEFINITIONS                         ///
 ////////////////////////////////////////////////////////////////////////
 
 /**Function*************************************************************
 
-  Synopsis    [Writes the graph structure of AIG in DOT.]
+  Synopsis    [Writes the graph structure of network for DOT.]
 
   Description [Useful for graph visualization using tools such as GraphViz: 
   http://www.graphviz.org/]
@@ -40,13 +45,36 @@
   SeeAlso     []
 
 ***********************************************************************/
-void Io_WriteDot( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow, char * pFileName )
+void Io_WriteDot( Abc_Ntk_t * pNtk, char * FileName )
+{
+    Vec_Ptr_t * vNodes;
+    vNodes = Abc_NtkCollectObjects( pNtk );
+    Io_WriteDotNtk( pNtk, vNodes, NULL, FileName, 0, 0 );
+    Vec_PtrFree( vNodes );
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Writes the graph structure of network for DOT.]
+
+  Description [Useful for graph visualization using tools such as GraphViz: 
+  http://www.graphviz.org/]
+  
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Io_WriteDotNtk( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow, char * pFileName, int fGateNames, int fUseReverse )
 {
     FILE * pFile;
-    Abc_Obj_t * pNode, * pTemp, * pPrev;
-    int LevelMin, LevelMax, fHasCos, Level, i;
+    Abc_Obj_t * pNode, * pFanin;
+    char * pSopString;
+    int LevelMin, LevelMax, fHasCos, Level, i, k, fHasBdds, fCompl;
     int Limit = 300;
 
+    assert( Abc_NtkIsStrash(pNtk) || Abc_NtkIsLogic(pNtk) );
+
     if ( vNodes->nSize < 1 )
     {
         printf( "The set has no nodes. DOT file is not written.\n" );
@@ -66,6 +94,16 @@ void Io_WriteDot( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow,
         return;
     }
 
+    // transform logic functions from BDD to SOP
+    if ( fHasBdds = Abc_NtkIsBddLogic(pNtk) )
+    {
+        if ( !Abc_NtkBddToSop(pNtk, 0) )
+        {
+            printf( "Io_WriteDotNtk(): Converting to SOPs has failed.\n" );
+            return;
+        }
+    }
+
     // mark the nodes from the set
     Vec_PtrForEachEntry( vNodes, pNode, i )
         pNode->fMarkC = 1;
@@ -73,6 +111,17 @@ void Io_WriteDot( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow,
         Vec_PtrForEachEntry( vNodesShow, pNode, i )
             pNode->fMarkB = 1;
 
+    // get the levels of nodes
+    LevelMax = Abc_NtkLevel( pNtk );
+    if ( fUseReverse )
+    {
+        LevelMin = Abc_NtkLevelReverse( pNtk );
+        assert( LevelMax == LevelMin );
+        Vec_PtrForEachEntry( vNodes, pNode, i )
+            if ( Abc_ObjIsNode(pNode) )
+                pNode->Level = LevelMax - pNode->Level + 1;
+    }
+
     // find the largest and the smallest levels
     LevelMin = 10000;
     LevelMax = -1;
@@ -102,14 +151,17 @@ void Io_WriteDot( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow,
     }
 
     // write the DOT header
-    fprintf( pFile, "# %s\n",  "AIG generated by ABC" );
+    fprintf( pFile, "# %s\n",  "Network structure generated by ABC" );
     fprintf( pFile, "\n" );
-    fprintf( pFile, "digraph AIG {\n" );
+    fprintf( pFile, "digraph network {\n" );
     fprintf( pFile, "size = \"7.5,10\";\n" );
+//    fprintf( pFile, "size = \"10,8.5\";\n" );
+//    fprintf( pFile, "size = \"14,11\";\n" );
+//    fprintf( pFile, "page = \"8,11\";\n" );
 //  fprintf( pFile, "ranksep = 0.5;\n" );
 //  fprintf( pFile, "nodesep = 0.5;\n" );
     fprintf( pFile, "center = true;\n" );
-//  fprintf( pFile, "orientation = landscape;\n" );
+//    fprintf( pFile, "orientation = landscape;\n" );
 //  fprintf( pFile, "edge [fontsize = 10];\n" );
 //  fprintf( pFile, "edge [dir = none];\n" );
     fprintf( pFile, "edge [dir = back];\n" );
@@ -158,7 +210,7 @@ void Io_WriteDot( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow,
     fprintf( pFile, "          fontsize=20,\n" );
     fprintf( pFile, "          fontname = \"Times-Roman\",\n" );
     fprintf( pFile, "          label=\"" );
-    fprintf( pFile, "%s", "AIG generated by ABC" );
+    fprintf( pFile, "%s", "Network structure visualized by ABC" );
     fprintf( pFile, "\\n" );
     fprintf( pFile, "Benchmark \\\"%s\\\". ", pNtk->pName );
     fprintf( pFile, "Time was %s. ",  Extra_TimeStamp() );
@@ -176,7 +228,10 @@ void Io_WriteDot( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow,
     fprintf( pFile, "          fontsize=18,\n" );
     fprintf( pFile, "          fontname = \"Times-Roman\",\n" );
     fprintf( pFile, "          label=\"" );
-    fprintf( pFile, "The set contains %d nodes and spans %d levels.", vNodes->nSize, LevelMax - LevelMin );
+    if ( Abc_NtkObjNum(pNtk) == Vec_PtrSize(vNodes) )
+        fprintf( pFile, "The network contains %d logic nodes and %d latches.", Abc_NtkNodeNum(pNtk), Abc_NtkLatchNum(pNtk) );
+    else
+        fprintf( pFile, "The set contains %d logic nodes and spans %d levels.", Abc_NtkCountLogicNodes(vNodes), LevelMax - LevelMin + 1 );
     fprintf( pFile, "\\n" );
     fprintf( pFile, "\"\n" );
     fprintf( pFile, "         ];\n" );
@@ -191,14 +246,16 @@ void Io_WriteDot( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow,
         fprintf( pFile, "  rank = same;\n" );
         // the labeling node of this level
         fprintf( pFile, "  Level%d;\n",  LevelMax );
-        // generat the PO nodes
+        // generate the PO nodes
         Vec_PtrForEachEntry( vNodes, pNode, i )
         {
             if ( !Abc_ObjIsCo(pNode) )
                 continue;
-            fprintf( pFile, "  Node%d%s [label = \"%s%s\"", pNode->Id, 
-                (Abc_ObjIsLatch(pNode)? "_in":""), Abc_ObjName(pNode), (Abc_ObjIsLatch(pNode)? "_in":"") );
-            fprintf( pFile, ", shape = %s", (Abc_ObjIsLatch(pNode)? "box":"invtriangle") );
+            fprintf( pFile, "  Node%d [label = \"%s%s\"", 
+                pNode->Id, 
+                (Abc_ObjIsBi(pNode)? Abc_ObjName(Abc_ObjFanout0(pNode)):Abc_ObjName(pNode)), 
+                (Abc_ObjIsBi(pNode)? "_in":"") );
+            fprintf( pFile, ", shape = %s", (Abc_ObjIsBi(pNode)? "box":"invtriangle") );
             if ( pNode->fMarkB )
                 fprintf( pFile, ", style = filled" );
             fprintf( pFile, ", color = coral, fillcolor = coral" );
@@ -220,7 +277,19 @@ void Io_WriteDot( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow,
         {
             if ( (int)pNode->Level != Level )
                 continue;
-            fprintf( pFile, "  Node%d [label = \"%d\"", pNode->Id, pNode->Id );
+            if ( Abc_ObjFaninNum(pNode) == 0 )
+                continue;
+//            fprintf( pFile, "  Node%d [label = \"%d\"", pNode->Id, pNode->Id );
+            if ( Abc_NtkIsStrash(pNtk) )
+                pSopString = "";
+            else if ( Abc_NtkHasMapping(pNtk) && fGateNames )
+                pSopString = Mio_GateReadName(pNode->pData);
+            else if ( Abc_NtkHasMapping(pNtk) )
+                pSopString = Abc_NtkPrintSop(Mio_GateReadSop(pNode->pData));
+            else
+                pSopString = Abc_NtkPrintSop(pNode->pData);
+            fprintf( pFile, "  Node%d [label = \"%d\\n%s\"", pNode->Id, pNode->Id, pSopString );
+
             fprintf( pFile, ", shape = ellipse" );
             if ( pNode->fMarkB )
                 fprintf( pFile, ", style = filled" );
@@ -238,14 +307,27 @@ void Io_WriteDot( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow,
         fprintf( pFile, "  rank = same;\n" );
         // the labeling node of this level
         fprintf( pFile, "  Level%d;\n",  LevelMin );
-        // generat the PO nodes
+        // generate the PO nodes
         Vec_PtrForEachEntry( vNodes, pNode, i )
         {
             if ( !Abc_ObjIsCi(pNode) )
+            {
+                // check if the costant node is present
+                if ( Abc_ObjFaninNum(pNode) == 0 && Abc_ObjFanoutNum(pNode) > 0 )
+                {
+                    fprintf( pFile, "  Node%d [label = \"Const%d\"", pNode->Id, Abc_NtkIsStrash(pNode->pNtk) || Abc_NodeIsConst1(pNode) );
+                    fprintf( pFile, ", shape = ellipse" );
+                    if ( pNode->fMarkB )
+                        fprintf( pFile, ", style = filled" );
+                    fprintf( pFile, ", color = coral, fillcolor = coral" );
+                    fprintf( pFile, "];\n" );
+                }
                 continue;
-            fprintf( pFile, "  Node%d%s [label = \"%s%s\"", pNode->Id, 
-                (Abc_ObjIsLatch(pNode)? "_out":""), Abc_ObjName(pNode), (Abc_ObjIsLatch(pNode)? "_out":"") );
-            fprintf( pFile, ", shape = %s", (Abc_ObjIsLatch(pNode)? "box":"triangle") );
+            }
+            fprintf( pFile, "  Node%d [label = \"%s\"", 
+                pNode->Id, 
+                (Abc_ObjIsBo(pNode)? Abc_ObjName(Abc_ObjFanin0(pNode)):Abc_ObjName(pNode)) );
+            fprintf( pFile, ", shape = %s", (Abc_ObjIsBo(pNode)? "box":"triangle") );
             if ( pNode->fMarkB )
                 fprintf( pFile, ", style = filled" );
             fprintf( pFile, ", color = coral, fillcolor = coral" );
@@ -262,48 +344,387 @@ void Io_WriteDot( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow,
     {
         if ( (int)pNode->Level != LevelMax )
             continue;
-        fprintf( pFile, "title2 -> Node%d%s [style = invis];\n", pNode->Id, 
-            (Abc_ObjIsLatch(pNode)? "_in":"") );
+        fprintf( pFile, "title2 -> Node%d [style = invis];\n", pNode->Id );
     }
 
     // generate edges
     Vec_PtrForEachEntry( vNodes, pNode, i )
     {
-        if ( Abc_ObjFaninNum(pNode) == 0 )
+        if ( Abc_ObjIsLatch(pNode) )
             continue;
-        // generate the edge from this node to the next
-        if ( Abc_ObjFanin0(pNode)->fMarkC )
+        Abc_ObjForEachFanin( pNode, pFanin, k )
         {
-            fprintf( pFile, "Node%d%s",  pNode->Id, (Abc_ObjIsLatch(pNode)? "_in":"") );
+            if ( Abc_ObjIsLatch(pFanin) )
+                continue;
+            fCompl = 0;
+            if ( Abc_NtkIsStrash(pNtk) )
+                fCompl = Abc_ObjFaninC(pNode, k);
+            // generate the edge from this node to the next
+            fprintf( pFile, "Node%d",  pNode->Id );
             fprintf( pFile, " -> " );
-            fprintf( pFile, "Node%d%s",  Abc_ObjFaninId0(pNode), (Abc_ObjIsLatch(Abc_ObjFanin0(pNode))? "_out":"") );
-            fprintf( pFile, " [style = %s]", Abc_ObjFaninC0(pNode)? "dotted" : "bold" );
+            fprintf( pFile, "Node%d",  pFanin->Id );
+            fprintf( pFile, " [style = %s", fCompl? "dotted" : "bold" );
+//            fprintf( pFile, ", label = \"%c\"", 'a' + k );
+            fprintf( pFile, "]" );
             fprintf( pFile, ";\n" );
         }
-        if ( Abc_ObjFaninNum(pNode) == 1 )
+    }
+
+    fprintf( pFile, "}" );
+    fprintf( pFile, "\n" );
+    fprintf( pFile, "\n" );
+    fclose( pFile );
+
+    // unmark the nodes from the set
+    Vec_PtrForEachEntry( vNodes, pNode, i )
+        pNode->fMarkC = 0;
+    if ( vNodesShow )
+        Vec_PtrForEachEntry( vNodesShow, pNode, i )
+            pNode->fMarkB = 0;
+
+    // convert the network back into BDDs if this is how it was
+    if ( fHasBdds )
+        Abc_NtkSopToBdd(pNtk);
+}
+
+
+/**Function*************************************************************
+
+  Synopsis    [Writes the graph structure of network for DOT.]
+
+  Description [Useful for graph visualization using tools such as GraphViz: 
+  http://www.graphviz.org/]
+  
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Io_WriteDotSeq( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow, char * pFileName, int fGateNames, int fUseReverse )
+{
+    FILE * pFile;
+    Abc_Obj_t * pNode, * pFanin;
+    char * pSopString;
+    int LevelMin, LevelMax, fHasCos, Level, i, k, fHasBdds, fCompl;
+    int Limit = 300;
+
+    assert( Abc_NtkIsStrash(pNtk) || Abc_NtkIsLogic(pNtk) );
+
+    if ( vNodes->nSize < 1 )
+    {
+        printf( "The set has no nodes. DOT file is not written.\n" );
+        return;
+    }
+
+    if ( vNodes->nSize > Limit )
+    {
+        printf( "The set has more than %d nodes. DOT file is not written.\n", Limit );
+        return;
+    }
+
+    // start the stream
+    if ( (pFile = fopen( pFileName, "w" )) == NULL )
+    {
+        fprintf( stdout, "Cannot open the intermediate file \"%s\".\n", pFileName );
+        return;
+    }
+
+    // transform logic functions from BDD to SOP
+    if ( fHasBdds = Abc_NtkIsBddLogic(pNtk) )
+    {
+        if ( !Abc_NtkBddToSop(pNtk, 0) )
+        {
+            printf( "Io_WriteDotNtk(): Converting to SOPs has failed.\n" );
+            return;
+        }
+    }
+
+    // mark the nodes from the set
+    Vec_PtrForEachEntry( vNodes, pNode, i )
+        pNode->fMarkC = 1;
+    if ( vNodesShow )
+        Vec_PtrForEachEntry( vNodesShow, pNode, i )
+            pNode->fMarkB = 1;
+
+    // get the levels of nodes
+    LevelMax = Abc_NtkLevel( pNtk );
+    if ( fUseReverse )
+    {
+        LevelMin = Abc_NtkLevelReverse( pNtk );
+        assert( LevelMax == LevelMin );
+        Vec_PtrForEachEntry( vNodes, pNode, i )
+            if ( Abc_ObjIsNode(pNode) )
+                pNode->Level = LevelMax - pNode->Level + 1;
+    }
+
+    // find the largest and the smallest levels
+    LevelMin = 10000;
+    LevelMax = -1;
+    fHasCos  = 0;
+    Vec_PtrForEachEntry( vNodes, pNode, i )
+    {
+        if ( Abc_ObjIsCo(pNode) )
+        {
+            fHasCos = 1;
             continue;
-        // generate the edge from this node to the next
-        if ( Abc_ObjFanin1(pNode)->fMarkC )
+        }
+        if ( LevelMin > (int)pNode->Level )
+            LevelMin = pNode->Level;
+        if ( LevelMax < (int)pNode->Level )
+            LevelMax = pNode->Level;
+    }
+
+    // set the level of the CO nodes
+    if ( fHasCos )
+    {
+        LevelMax++;
+        Vec_PtrForEachEntry( vNodes, pNode, i )
         {
-            fprintf( pFile, "Node%d",  pNode->Id );
-            fprintf( pFile, " -> " );
-            fprintf( pFile, "Node%d%s",  Abc_ObjFaninId1(pNode), (Abc_ObjIsLatch(Abc_ObjFanin1(pNode))? "_out":"") );
-            fprintf( pFile, " [style = %s]", Abc_ObjFaninC1(pNode)? "dotted" : "bold" );
-            fprintf( pFile, ";\n" );
+            if ( Abc_ObjIsCo(pNode) )
+                pNode->Level = LevelMax;
+        }
+    }
+
+    // write the DOT header
+    fprintf( pFile, "# %s\n",  "Network structure generated by ABC" );
+    fprintf( pFile, "\n" );
+    fprintf( pFile, "digraph network {\n" );
+    fprintf( pFile, "size = \"7.5,10\";\n" );
+//    fprintf( pFile, "size = \"10,8.5\";\n" );
+//    fprintf( pFile, "size = \"14,11\";\n" );
+//    fprintf( pFile, "page = \"8,11\";\n" );
+//  fprintf( pFile, "ranksep = 0.5;\n" );
+//  fprintf( pFile, "nodesep = 0.5;\n" );
+    fprintf( pFile, "center = true;\n" );
+//    fprintf( pFile, "orientation = landscape;\n" );
+//  fprintf( pFile, "edge [fontsize = 10];\n" );
+//  fprintf( pFile, "edge [dir = none];\n" );
+    fprintf( pFile, "edge [dir = back];\n" );
+    fprintf( pFile, "\n" );
+
+    // labels on the left of the picture
+    fprintf( pFile, "{\n" );
+    fprintf( pFile, "  node [shape = plaintext];\n" );
+    fprintf( pFile, "  edge [style = invis];\n" );
+    fprintf( pFile, "  LevelTitle1 [label=\"\"];\n" );
+    fprintf( pFile, "  LevelTitle2 [label=\"\"];\n" );
+    // generate node names with labels
+    for ( Level = LevelMax; Level >= LevelMin; Level-- )
+    {
+        // the visible node name
+        fprintf( pFile, "  Level%d", Level );
+        fprintf( pFile, " [label = " );
+        // label name
+        fprintf( pFile, "\"" );
+        fprintf( pFile, "\"" );
+        fprintf( pFile, "];\n" );
+    }
+
+    // genetate the sequence of visible/invisible nodes to mark levels
+    fprintf( pFile, "  LevelTitle1 ->  LevelTitle2 ->" );
+    for ( Level = LevelMax; Level >= LevelMin; Level-- )
+    {
+        // the visible node name
+        fprintf( pFile, "  Level%d",  Level );
+        // the connector
+        if ( Level != LevelMin )
+            fprintf( pFile, " ->" );
+        else
+            fprintf( pFile, ";" );
+    }
+    fprintf( pFile, "\n" );
+    fprintf( pFile, "}" );
+    fprintf( pFile, "\n" );
+    fprintf( pFile, "\n" );
+
+    // generate title box on top
+    fprintf( pFile, "{\n" );
+    fprintf( pFile, "  rank = same;\n" );
+    fprintf( pFile, "  LevelTitle1;\n" );
+    fprintf( pFile, "  title1 [shape=plaintext,\n" );
+    fprintf( pFile, "          fontsize=20,\n" );
+    fprintf( pFile, "          fontname = \"Times-Roman\",\n" );
+    fprintf( pFile, "          label=\"" );
+    fprintf( pFile, "%s", "Network structure visualized by ABC" );
+    fprintf( pFile, "\\n" );
+    fprintf( pFile, "Benchmark \\\"%s\\\". ", pNtk->pName );
+    fprintf( pFile, "Time was %s. ",  Extra_TimeStamp() );
+    fprintf( pFile, "\"\n" );
+    fprintf( pFile, "         ];\n" );
+    fprintf( pFile, "}" );
+    fprintf( pFile, "\n" );
+    fprintf( pFile, "\n" );
+
+    // generate statistics box
+    fprintf( pFile, "{\n" );
+    fprintf( pFile, "  rank = same;\n" );
+    fprintf( pFile, "  LevelTitle2;\n" );
+    fprintf( pFile, "  title2 [shape=plaintext,\n" );
+    fprintf( pFile, "          fontsize=18,\n" );
+    fprintf( pFile, "          fontname = \"Times-Roman\",\n" );
+    fprintf( pFile, "          label=\"" );
+    if ( Abc_NtkObjNum(pNtk) == Vec_PtrSize(vNodes) )
+        fprintf( pFile, "The network contains %d logic nodes and %d latches.", Abc_NtkNodeNum(pNtk), Abc_NtkLatchNum(pNtk) );
+    else
+        fprintf( pFile, "The set contains %d logic nodes and spans %d levels.", Abc_NtkCountLogicNodes(vNodes), LevelMax - LevelMin + 1 );
+    fprintf( pFile, "\\n" );
+    fprintf( pFile, "\"\n" );
+    fprintf( pFile, "         ];\n" );
+    fprintf( pFile, "}" );
+    fprintf( pFile, "\n" );
+    fprintf( pFile, "\n" );
+
+    // generate the POs
+    if ( fHasCos )
+    {
+        fprintf( pFile, "{\n" );
+        fprintf( pFile, "  rank = same;\n" );
+        // the labeling node of this level
+        fprintf( pFile, "  Level%d;\n",  LevelMax );
+        // generate the PO nodes
+        Vec_PtrForEachEntry( vNodes, pNode, i )
+        {
+            if ( !Abc_ObjIsPo(pNode) )
+                continue;
+            fprintf( pFile, "  Node%d [label = \"%s\"", pNode->Id, Abc_ObjName(pNode) );
+            fprintf( pFile, ", shape = %s", "invtriangle" );
+            if ( pNode->fMarkB )
+                fprintf( pFile, ", style = filled" );
+            fprintf( pFile, ", color = coral, fillcolor = coral" );
+            fprintf( pFile, "];\n" );
+        }
+        fprintf( pFile, "}" );
+        fprintf( pFile, "\n" );
+        fprintf( pFile, "\n" );
+    }
+
+    // generate nodes of each rank
+    for ( Level = LevelMax - fHasCos; Level >= LevelMin && Level > 0; Level-- )
+    {
+        fprintf( pFile, "{\n" );
+        fprintf( pFile, "  rank = same;\n" );
+        // the labeling node of this level
+        fprintf( pFile, "  Level%d;\n",  Level );
+        Abc_NtkForEachNode( pNtk, pNode, i )
+        {
+            if ( (int)pNode->Level != Level )
+                continue;
+//            fprintf( pFile, "  Node%d [label = \"%d\"", pNode->Id, pNode->Id );
+            if ( Abc_NtkIsStrash(pNtk) )
+                pSopString = "";
+            else if ( Abc_NtkHasMapping(pNtk) && fGateNames )
+                pSopString = Mio_GateReadName(pNode->pData);
+            else if ( Abc_NtkHasMapping(pNtk) )
+                pSopString = Abc_NtkPrintSop(Mio_GateReadSop(pNode->pData));
+            else
+                pSopString = Abc_NtkPrintSop(pNode->pData);
+            fprintf( pFile, "  Node%d [label = \"%d\\n%s\"", pNode->Id, pNode->Id, pSopString );
+
+            fprintf( pFile, ", shape = ellipse" );
+            if ( pNode->fMarkB )
+                fprintf( pFile, ", style = filled" );
+            fprintf( pFile, "];\n" );
+        }
+        fprintf( pFile, "}" );
+        fprintf( pFile, "\n" );
+        fprintf( pFile, "\n" );
+    }
+
+    // generate the PI nodes if any
+    if ( LevelMin == 0 )
+    {
+        fprintf( pFile, "{\n" );
+        fprintf( pFile, "  rank = same;\n" );
+        // the labeling node of this level
+        fprintf( pFile, "  Level%d;\n",  LevelMin );
+        // generate the PO nodes
+        Vec_PtrForEachEntry( vNodes, pNode, i )
+        {
+            if ( pNode->Level > 0 )
+                continue;
+            if ( !Abc_ObjIsPi(pNode) )
+            {
+                // check if the costant node is present
+                if ( Abc_ObjFaninNum(pNode) == 0 && Abc_ObjFanoutNum(pNode) > 0 )
+                {
+                    fprintf( pFile, "  Node%d [label = \"Const1\"", pNode->Id );
+                    fprintf( pFile, ", shape = ellipse" );
+                    if ( pNode->fMarkB )
+                        fprintf( pFile, ", style = filled" );
+                    fprintf( pFile, ", color = coral, fillcolor = coral" );
+                    fprintf( pFile, "];\n" );
+                }
+                continue;
+            }
+            fprintf( pFile, "  Node%d [label = \"%s\"", pNode->Id, Abc_ObjName(pNode) );
+            fprintf( pFile, ", shape = %s", "triangle" );
+            if ( pNode->fMarkB )
+                fprintf( pFile, ", style = filled" );
+            fprintf( pFile, ", color = coral, fillcolor = coral" );
+            fprintf( pFile, "];\n" );
         }
-        // generate the edges between the equivalent nodes
-        pPrev = pNode;
-        for ( pTemp = pNode->pData; pTemp; pTemp = pTemp->pData )
+        fprintf( pFile, "}" );
+        fprintf( pFile, "\n" );
+        fprintf( pFile, "\n" );
+    }
+
+//    fprintf( pFile, "{\n" );
+    Vec_PtrForEachEntry( vNodes, pNode, i )
+    {
+        if ( !Abc_ObjIsLatch(pNode) )
+            continue;
+        fprintf( pFile, "Node%d [label = \"%s\"", pNode->Id, Abc_ObjName(pNode) );
+        fprintf( pFile, ", shape = box" );
+        if ( pNode->fMarkB )
+            fprintf( pFile, ", style = filled" );
+        fprintf( pFile, ", color = coral, fillcolor = coral" );
+        fprintf( pFile, "];\n" );
+    }
+//    fprintf( pFile, "}" );
+//    fprintf( pFile, "\n" );
+    fprintf( pFile, "\n" );
+
+    // generate invisible edges from the square down
+    fprintf( pFile, "title1 -> title2 [style = invis];\n" );
+    Vec_PtrForEachEntry( vNodes, pNode, i )
+    {
+        if ( (int)pNode->Level != LevelMax )
+            continue;
+        if ( !Abc_ObjIsPo(pNode) )
+            continue;
+        fprintf( pFile, "title2 -> Node%d [style = invis];\n", pNode->Id );
+    }
+
+    // generate edges
+    Vec_PtrForEachEntry( vNodes, pNode, i )
+    {
+        if ( Abc_ObjIsBi(pNode) || Abc_ObjIsBo(pNode) )
+            continue;
+        Abc_ObjForEachFanin( pNode, pFanin, k )
         {
-            if ( pTemp->fMarkC )
+            fCompl = 0;
+            if ( Abc_NtkIsStrash(pNtk) )
             {
-                fprintf( pFile, "Node%d",  pPrev->Id );
-                fprintf( pFile, " -> " );
-                fprintf( pFile, "Node%d",  pTemp->Id );
-                fprintf( pFile, " [style = %s]", (pPrev->fPhase ^ pTemp->fPhase)? "dotted" : "bold" );
-                fprintf( pFile, ";\n" );
-                pPrev = pTemp;
+                if ( Abc_ObjIsBi(pFanin) )
+                    fCompl = Abc_ObjFaninC(pFanin, k);
+                else
+                    fCompl = Abc_ObjFaninC(pNode, k);
             }
+            if ( Abc_ObjIsBi(pFanin) || Abc_ObjIsBo(pFanin) )
+                pFanin = Abc_ObjFanin0(pFanin);
+            if ( Abc_ObjIsBi(pFanin) || Abc_ObjIsBo(pFanin) )
+                pFanin = Abc_ObjFanin0(pFanin);
+            if ( !pFanin->fMarkC )
+                continue;
+
+            // generate the edge from this node to the next
+            fprintf( pFile, "Node%d",  pNode->Id );
+            fprintf( pFile, " -> " );
+            fprintf( pFile, "Node%d",  pFanin->Id );
+            fprintf( pFile, " [style = %s", fCompl? "dotted" : "bold" );
+//            fprintf( pFile, ", label = \"%c\"", 'a' + k );
+            fprintf( pFile, "]" );
+            fprintf( pFile, ";\n" );
         }
     }
 
@@ -318,6 +739,67 @@ void Io_WriteDot( Abc_Ntk_t * pNtk, Vec_Ptr_t * vNodes, Vec_Ptr_t * vNodesShow,
     if ( vNodesShow )
         Vec_PtrForEachEntry( vNodesShow, pNode, i )
             pNode->fMarkB = 0;
+
+    // convert the network back into BDDs if this is how it was
+    if ( fHasBdds )
+        Abc_NtkSopToBdd(pNtk);
+}
+
+
+/**Function*************************************************************
+
+  Synopsis    [Computes the printable SOP form.]
+
+  Description []
+  
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+char * Abc_NtkPrintSop( char * pSop ) 
+{
+    static char Buffer[1000];
+    char * pGet, * pSet;
+    pSet = Buffer;
+    for ( pGet = pSop; *pGet; pGet++ )
+    {        
+        if ( *pGet == '\n' )
+        {
+            *pSet++ = '\\';
+            *pSet++ = 'n';
+        }
+        else
+            *pSet++ = *pGet;
+    }
+    *(pSet-2) = 0;
+    return Buffer;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Computes the printable SOP form.]
+
+  Description []
+  
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Abc_NtkCountLogicNodes( Vec_Ptr_t * vNodes )
+{
+    Abc_Obj_t * pObj;
+    int i, Counter = 0;
+    Vec_PtrForEachEntry( vNodes, pObj, i )
+    {
+        if ( !Abc_ObjIsNode(pObj) )
+            continue;
+        if ( Abc_ObjFaninNum(pObj) == 0 && Abc_ObjFanoutNum(pObj) == 0 )
+            continue;
+        Counter ++;
+    }
+    return Counter;
 }
 
 ////////////////////////////////////////////////////////////////////////