Version abc50904

1 files changed, 184 insertions, 0 deletions

diff --git a/src/base/abci/abcRewrite.c b/src/base/abci/abcRewrite.c
new file mode 100644
index 00000000..75fe1627
--- /dev/null
+++ b/src/base/abci/abcRewrite.c
@@ -0,0 +1,184 @@
+/**CFile****************************************************************
+
+  FileName    [abcRes.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Network and node package.]
+
+  Synopsis    [Technology-independent resynthesis of the AIG.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: abcRes.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "abc.h"
+#include "rwr.h"
+#include "dec.h"
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+static Cut_Man_t * Abc_NtkStartCutManForRewrite( Abc_Ntk_t * pNtk, int fDrop );
+static void        Abc_NodePrintCuts( Abc_Obj_t * pNode );
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFITIONS                           ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Performs incremental rewriting of the AIG.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Abc_NtkRewrite( Abc_Ntk_t * pNtk, int fUseZeros, int fVerbose )
+{
+    int fCheck = 1;
+    int fDrop = 0;
+    ProgressBar * pProgress;
+    Cut_Man_t * pManCut;
+    Rwr_Man_t * pManRwr;
+    Abc_Obj_t * pNode;
+    int i, nNodes, nGain;
+    int clk, clkStart = clock();
+
+    assert( Abc_NtkIsStrash(pNtk) );
+    // cleanup the AIG
+    Abc_AigCleanup(pNtk->pManFunc);
+    // start the rewriting manager
+    pManRwr = Rwr_ManStart( 0 );
+    if ( pManRwr == NULL )
+        return 0;
+    Abc_NtkStartReverseLevels( pNtk );
+    // start the cut manager
+clk = clock();
+    pManCut = Abc_NtkStartCutManForRewrite( pNtk, fDrop );
+Rwr_ManAddTimeCuts( pManRwr, clock() - clk );
+    pNtk->pManCut = pManCut;
+
+    // resynthesize each node once
+    nNodes = Abc_NtkObjNumMax(pNtk);
+    pProgress = Extra_ProgressBarStart( stdout, nNodes );
+    Abc_NtkForEachNode( pNtk, pNode, i )
+    {
+        Extra_ProgressBarUpdate( pProgress, i, NULL );
+        // stop if all nodes have been tried once
+        if ( i >= nNodes )
+            break;
+        // skip the constant node
+        if ( Abc_NodeIsConst(pNode) )
+            continue;
+        // for each cut, try to resynthesize it
+        nGain = Rwr_NodeRewrite( pManRwr, pManCut, pNode, fUseZeros );
+        if ( nGain > 0 || nGain == 0 && fUseZeros )
+        {
+            Dec_Graph_t * pGraph = Rwr_ManReadDecs(pManRwr);
+            int fCompl           = Rwr_ManReadCompl(pManRwr);
+            // complement the FF if needed
+            if ( fCompl ) Dec_GraphComplement( pGraph );
+            Dec_GraphUpdateNetwork( pNode, pGraph, nGain );
+            if ( fCompl ) Dec_GraphComplement( pGraph );
+        }
+    }
+    Extra_ProgressBarStop( pProgress );
+Rwr_ManAddTimeTotal( pManRwr, clock() - clkStart );
+    // print stats
+    if ( fVerbose )
+        Rwr_ManPrintStats( pManRwr );
+    // delete the managers
+    Rwr_ManStop( pManRwr );
+    Cut_ManStop( pManCut );
+    pNtk->pManCut = NULL;
+    Abc_NtkStopReverseLevels( pNtk );
+    // check
+    if ( fCheck && !Abc_NtkCheck( pNtk ) )
+    {
+        printf( "Abc_NtkRewrite: The network check has failed.\n" );
+        return 0;
+    }
+    return 1;
+}
+
+
+/**Function*************************************************************
+
+  Synopsis    [Starts the cut manager for rewriting.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Cut_Man_t * Abc_NtkStartCutManForRewrite( Abc_Ntk_t * pNtk, int fDrop )
+{
+    static Cut_Params_t Params, * pParams = &Params;
+    Cut_Man_t * pManCut;
+    Abc_Obj_t * pObj;
+    int i;
+    // start the cut manager
+    memset( pParams, 0, sizeof(Cut_Params_t) );
+    pParams->nVarsMax  = 4;     // the max cut size ("k" of the k-feasible cuts)
+    pParams->nKeepMax  = 250;   // the max number of cuts kept at a node
+    pParams->fTruth    = 1;     // compute truth tables
+    pParams->fHash     = 1;     // hash cuts to detect unique
+    pParams->fFilter   = 0;     // filter dominated cuts
+    pParams->fSeq      = 0;     // compute sequential cuts
+    pParams->fDrop     = fDrop; // drop cuts on the fly
+    pParams->fVerbose  = 0;     // the verbosiness flag
+    pParams->nIdsMax   = Abc_NtkObjNumMax( pNtk );
+    pManCut = Cut_ManStart( pParams );
+    if ( pParams->fDrop )
+        Cut_ManSetFanoutCounts( pManCut, Abc_NtkFanoutCounts(pNtk) );
+    // set cuts for PIs
+    Abc_NtkForEachCi( pNtk, pObj, i )
+        if ( Abc_ObjFanoutNum(pObj) > 0 )
+            Cut_NodeSetTriv( pManCut, pObj->Id );
+    return pManCut;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Prints the cuts at the nodes.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Abc_NodePrintCuts( Abc_Obj_t * pNode )
+{
+    Cut_Cut_t * pCut;
+    unsigned uTruth;
+    printf( "\nNode %s\n", Abc_ObjName(pNode) );
+    for ( pCut = (Cut_Cut_t *)pNode->pCopy; pCut; pCut = pCut->pNext )
+    {
+        uTruth = pCut->uTruth;
+        Extra_PrintBinary( stdout, &uTruth, 16 ); 
+        printf( "   " );
+        Cut_CutPrint( pCut );   
+        printf( "\n" );
+    }
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+