Integrating sweeping information.

7 files changed, 484 insertions, 6 deletions

diff --git a/src/aig/gia/gia.h b/src/aig/gia/gia.h
index 6a1ce0bc..500096e1 100644
--- a/src/aig/gia/gia.h
+++ b/src/aig/gia/gia.h
@@ -976,6 +976,7 @@ extern Gia_Man_t *         Gia_ManDupWithHierarchy( Gia_Man_t * p, Vec_Int_t **
 extern Gia_Man_t *         Gia_ManDupWithBoxes( Gia_Man_t * p, Gia_Man_t * pBoxes );
 extern int                 Gia_ManLevelWithBoxes( Gia_Man_t * p );
 extern int                 Gia_ManVerifyWithBoxes( Gia_Man_t * pGia, void * pParsInit );
+extern void *              Gia_ManUpdateTimMan( Gia_Man_t * p, Vec_Int_t * vBoxPres );
 /*=== giaTruth.c ===========================================================*/
 extern word                Gia_ObjComputeTruthTable6( Gia_Man_t * p, Gia_Obj_t * pObj, Vec_Int_t * vSupp, Vec_Wrd_t * vTruths );
 extern int                 Gia_ObjCollectInternal( Gia_Man_t * p, Gia_Obj_t * pObj );
diff --git a/src/aig/gia/giaMan.c b/src/aig/gia/giaMan.c
index 9e05bd40..493d3ed1 100644
--- a/src/aig/gia/giaMan.c
+++ b/src/aig/gia/giaMan.c
@@ -334,6 +334,8 @@ void Gia_ManPrintStats( Gia_Man_t * p, int fTents, int fSwitch, int fCut )
         Gia_ManPrintPackingStats( p );
     if ( p->pPlacement )
         Gia_ManPrintPlacement( p );
+    if ( p->pManTime )
+        Tim_ManPrintStats( p->pManTime );
     // print register classes
     Gia_ManPrintFlopClasses( p );
     Gia_ManPrintGateClasses( p );
diff --git a/src/aig/gia/giaSweep.c b/src/aig/gia/giaSweep.c
new file mode 100644
index 00000000..184bf91c
--- /dev/null
+++ b/src/aig/gia/giaSweep.c
@@ -0,0 +1,325 @@
+/**CFile****************************************************************
+
+  FileName    [giaSweep.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Scalable AIG package.]
+
+  Synopsis    [Sweeping of GIA manager.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: giaSweep.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "gia.h"
+#include "giaAig.h"
+#include "proof/dch/dch.h"
+
+ABC_NAMESPACE_IMPL_START
+
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+
+/**Function*************************************************************
+
+  Synopsis    [Mark GIA nodes that feed into POs.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Gia_ManFraigCheckCis( Gia_Man_t * p, Gia_Obj_t * pObj )
+{
+    for ( assert( Gia_ObjIsCi(pObj) ); Gia_ObjIsCi(pObj); pObj-- )
+        if ( Gia_ObjIsTravIdCurrent(p, pObj) )
+            return 1;
+    return 0;
+}
+Gia_Obj_t * Gia_ManFraigMarkCis( Gia_Man_t * p, Gia_Obj_t * pObj, int fMark )
+{
+    for ( assert( Gia_ObjIsCi(pObj) ); Gia_ObjIsCi(pObj); pObj-- )
+        if ( fMark )
+            Gia_ObjSetTravIdCurrent( p, pObj );
+    return pObj;
+}
+Gia_Obj_t * Gia_ManFraigMarkCos( Gia_Man_t * p, Gia_Obj_t * pObj, int fMark )
+{
+    for ( assert( Gia_ObjIsCo(pObj) ); Gia_ObjIsCo(pObj); pObj-- )
+        if ( fMark )
+            Gia_ObjSetTravIdCurrent( p, pObj );
+    return pObj;
+}
+Gia_Obj_t * Gia_ManFraigMarkAnd( Gia_Man_t * p, Gia_Obj_t * pObj )
+{
+    for ( assert( Gia_ObjIsAnd(pObj) ); Gia_ObjIsAnd(pObj); pObj-- )
+        if ( Gia_ObjIsTravIdCurrent(p, pObj) )
+        {
+            Gia_ObjSetTravIdCurrent( p, Gia_ObjFanin0(pObj) );
+            Gia_ObjSetTravIdCurrent( p, Gia_ObjFanin1(pObj) );
+        }
+    return pObj;
+}
+Gia_Man_t * Gia_ManFraigCreateGia( Gia_Man_t * p )
+{
+    Vec_Int_t * vBoxPres;
+    Gia_Man_t * pNew;
+    Gia_Obj_t * pObj;
+    int i, fLabelPos;
+    assert( p->pManTime != NULL );
+    // start marks
+    Gia_ManIncrementTravId( p );
+    Gia_ObjSetTravIdCurrent( p, Gia_ManConst0(p) );
+    vBoxPres = Vec_IntAlloc( 1000 );
+    // mark primary outputs
+    fLabelPos = 1;
+    pObj = Gia_ManObj( p, Gia_ManObjNum(p) - 1 );
+    assert( Gia_ObjIsCo(pObj) );
+    while ( Gia_ObjIsCo(pObj) )
+    {
+        pObj = Gia_ManFraigMarkCos( p, pObj, fLabelPos );
+        if ( Gia_ObjIsAnd(pObj) )
+            pObj = Gia_ManFraigMarkAnd( p, pObj );
+        assert( Gia_ObjIsCi(pObj) );
+        fLabelPos = Gia_ManFraigCheckCis(p, pObj);
+        pObj = Gia_ManFraigMarkCis( p, pObj, fLabelPos );
+        Vec_IntPush( vBoxPres, fLabelPos );
+    }
+    Vec_IntPop( vBoxPres );
+    Vec_IntReverseOrder( vBoxPres );
+    assert( Gia_ObjIsConst0(pObj) );
+    // mark primary inputs
+    Gia_ManForEachObj1( p, pObj, i )
+        if ( Gia_ObjIsCi(pObj) )
+            Gia_ObjSetTravIdCurrent( p, pObj );
+        else
+            break;
+    // duplicate marked entries
+    pNew = Gia_ManStart( Gia_ManObjNum(p) );
+    pNew->pName = Abc_UtilStrsav( p->pName );
+    pNew->pSpec = Abc_UtilStrsav( p->pSpec );
+    Gia_ManConst0(p)->Value = 0;
+    Gia_ManForEachObj1( p, pObj, i )
+    {
+        if ( !Gia_ObjIsTravIdCurrent(p, pObj) )
+            continue;
+        if ( Gia_ObjIsCi(pObj) )
+            pObj->Value = Gia_ManAppendCi(pNew);
+        else if ( Gia_ObjIsAnd(pObj) )
+            pObj->Value = Gia_ManAppendAnd( pNew, Gia_ObjFanin0Copy(pObj), Gia_ObjFanin1Copy(pObj) );
+        else if ( Gia_ObjIsCo(pObj) )
+            pObj->Value = Gia_ManAppendCo( pNew, Gia_ObjFanin0Copy(pObj) );
+        else assert( 0 );
+    }
+    // update timing manager
+    pNew->pManTime = Gia_ManUpdateTimMan( p, vBoxPres );
+    Vec_IntFree( vBoxPres );
+    return pNew;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Gia_Man_t * Gia_ManFraigExtractGia( Gia_Man_t * p, int * pReprs )
+{
+    Gia_Man_t * pNew;
+    Gia_Obj_t * pObj;
+    int i;
+    assert( p->pSibls == NULL );
+    assert( Gia_ManRegNum(p) == 0 );
+    pNew = Gia_ManStart( Gia_ManObjNum(p) );
+    pNew->pName = Abc_UtilStrsav( p->pName );
+    pNew->pSpec = Abc_UtilStrsav( p->pSpec );
+    Gia_ManHashAlloc( pNew );
+    // copy const and real PIs
+    Gia_ManFillValue( p );
+    Gia_ManForEachObj( p, pObj, i )
+    {
+        if ( Gia_ObjIsAnd(pObj) )
+        {
+            assert( pReprs[i] == -1 || Abc_Lit2Var(pReprs[i]) < i );
+            if ( pReprs[i] == -1 )
+                pObj->Value = Gia_ManAppendAnd( pNew, Gia_ObjFanin0Copy(pObj), Gia_ObjFanin1Copy(pObj) );
+            else
+                pObj->Value = Abc_LitNotCond( Gia_ObjValue(Gia_ManObj(p, Abc_Lit2Var(pReprs[i]))), Abc_LitIsCompl(pReprs[i]) );
+        }
+        else if ( Gia_ObjIsCi(pObj) )
+            pObj->Value = Gia_ManAppendCi( pNew );
+        else if ( Gia_ObjIsCo(pObj) )
+            pObj->Value = Gia_ManAppendCo( pNew, Gia_ObjFanin0Copy(pObj) );
+        else if ( Gia_ObjIsConst0(pObj) )
+            pObj->Value = 0;
+        else assert( 0 );
+    }
+    Gia_ManHashStop( pNew );
+    return pNew;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Computes representatives in terms of the original objects.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int * Gia_ManFraigSelectReprs( Gia_Man_t * p, Gia_Man_t * pGia, int fVerbose )
+{
+    Gia_Obj_t * pObj;
+    int * pReprs   = ABC_FALLOC( int, Gia_ManObjNum(p) );
+    int * pGia2Abc = ABC_FALLOC( int, Gia_ManObjNum(pGia) );
+    int i, iLitGia, iLitGia2, iReprGia, fCompl;
+    int nConsts = 0, nReprs = 0;
+    pGia2Abc[0] = 0;
+    Gia_ManSetPhase( pGia );
+    Gia_ManForEachObj1( p, pObj, i )
+    {
+        if ( Gia_ObjIsCo(pObj) )
+            continue;
+        assert( Gia_ObjIsCi(pObj) || Gia_ObjIsAnd(pObj) );
+        iLitGia = Gia_ObjValue(pObj);
+        if ( iLitGia == -1 )
+            continue;
+        iReprGia = Gia_ObjReprSelf( pGia, Abc_Lit2Var(iLitGia) );
+        if ( pGia2Abc[iReprGia] == -1 )
+            pGia2Abc[iReprGia] = i;
+        else
+        { 
+//            iLitGia2 = Abc2_ObjCopyId( p, pGia2Abc[iReprGia] );
+            iLitGia2 = Gia_ObjValue( Gia_ManObj(p, pGia2Abc[iReprGia]) );
+            assert( Gia_ObjReprSelf(pGia, Abc_Lit2Var(iLitGia)) == Gia_ObjReprSelf(pGia, Abc_Lit2Var(iLitGia2)) );
+            fCompl  = Abc_LitIsCompl(iLitGia) ^ Abc_LitIsCompl(iLitGia2);
+            fCompl ^= Gia_ManObj(pGia, Abc_Lit2Var(iLitGia))->fPhase;
+            fCompl ^= Gia_ManObj(pGia, Abc_Lit2Var(iLitGia2))->fPhase;
+            pReprs[i] = Abc_Var2Lit( pGia2Abc[iReprGia], fCompl );
+            if ( pGia2Abc[iReprGia] == 0 )
+                nConsts++;
+            else
+                nReprs++;
+        }
+    }
+    ABC_FREE( pGia2Abc );
+    if ( fVerbose )
+        printf( "Found %d const reprs and %d other reprs.\n", nConsts, nReprs );
+    return pReprs;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Gia_ManFraigSweepPerform( Gia_Man_t * p, void * pPars )
+{
+    Aig_Man_t * pNew;
+    pNew = Gia_ManToAigSimple( p );
+    assert( Gia_ManObjNum(p) == Aig_ManObjNum(pNew) );
+    Dch_ComputeEquivalences( pNew, (Dch_Pars_t *)pPars );
+    Gia_ManReprFromAigRepr( pNew, p );
+    Aig_ManStop( pNew );
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Reduces root model with scorr.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Gia_Man_t * Gia_ManFraigSweep( Gia_Man_t * p, void * pPars )
+{ 
+    Gia_Man_t * pGia, * pNew, * pTemp;
+    int * pReprs;
+    assert( Gia_ManRegNum(p) == 0 );
+    if ( p->pManTime == NULL )
+    {
+        Gia_ManFraigSweepPerform( p, pPars );
+        pNew = Gia_ManEquivReduce( p, 1, 0, 0 );
+        if ( pNew == NULL )
+            return Gia_ManDup(p);
+        return pNew;
+    }
+    if ( p->pAigExtra == NULL )
+    {
+        printf( "Timing manager is given but there is no GIA of boxes.\n" );
+        return NULL;
+    }
+    // find global equivalences
+    pGia = Gia_ManDupWithBoxes( p, p->pAigExtra );
+    Gia_ManFraigSweepPerform( pGia, pPars );
+    // transfer equivalences
+    pNew = Gia_ManDupWithHierarchy( p, NULL );
+    pReprs = Gia_ManFraigSelectReprs( pNew, pGia, ((Dch_Pars_t *)pPars)->fVerbose );
+    Gia_ManStop( pGia );
+    // reduce AIG
+    pNew = Gia_ManFraigExtractGia( pTemp = pNew, pReprs );
+    Gia_ManStop( pTemp );
+    ABC_FREE( pReprs );
+    // order reduced AIG
+    pNew->pManTime = p->pManTime;
+    pNew = Gia_ManDupWithHierarchy( pTemp = pNew, NULL );
+    pTemp->pManTime = NULL;
+    Gia_ManStop( pTemp );
+    // derive new AIG
+    assert( pTemp->pManTime == NULL );
+    pNew = Gia_ManFraigCreateGia( pTemp = pNew );
+    assert( pNew->pManTime != NULL );
+    Gia_ManStop( pTemp );
+    return pNew;
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/aig/gia/giaTim.c b/src/aig/gia/giaTim.c
index 03018513..d6b67d7c 100644
--- a/src/aig/gia/giaTim.c
+++ b/src/aig/gia/giaTim.c
@@ -559,6 +559,25 @@ int Gia_ManVerifyWithBoxes( Gia_Man_t * pGia, void * pParsInit )
     return Status;
 }
 
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void * Gia_ManUpdateTimMan( Gia_Man_t * p, Vec_Int_t * vBoxPres )
+{
+    assert( p->pManTime != NULL );
+    assert( Tim_ManBoxNum(p->pManTime) == Vec_IntSize(vBoxPres) );
+    return Tim_ManTrim( p->pManTime, vBoxPres );
+
+}
+
 ////////////////////////////////////////////////////////////////////////
 ///                       END OF FILE                                ///
 ////////////////////////////////////////////////////////////////////////
diff --git a/src/aig/gia/module.make b/src/aig/gia/module.make
index 169b71e7..1b31ff3d 100644
--- a/src/aig/gia/module.make
+++ b/src/aig/gia/module.make
@@ -36,6 +36,7 @@ SRC +=    src/aig/gia/gia.c \
     src/aig/gia/giaSort.c \
     src/aig/gia/giaSpeedup.c \
     src/aig/gia/giaSupMin.c \
+    src/aig/gia/giaSweep.c \
     src/aig/gia/giaSwitch.c \
     src/aig/gia/giaTest.c \
     src/aig/gia/giaTim.c \
diff --git a/src/misc/tim/tim.h b/src/misc/tim/tim.h
index 48bef93a..66181a9c 100644
--- a/src/misc/tim/tim.h
+++ b/src/misc/tim/tim.h
@@ -132,6 +132,7 @@ extern int             Tim_ManGetArrsReqs( Tim_Man_t * p, Vec_Flt_t ** pvInArrs,
 extern void            Tim_ManStop( Tim_Man_t * p );
 extern void            Tim_ManStopP( Tim_Man_t ** p );
 extern void            Tim_ManPrint( Tim_Man_t * p );
+extern void            Tim_ManPrintStats( Tim_Man_t * p );
 extern int             Tim_ManCiNum( Tim_Man_t * p );
 extern int             Tim_ManCoNum( Tim_Man_t * p );
 extern int             Tim_ManPiNum( Tim_Man_t * p );
diff --git a/src/misc/tim/timMan.c b/src/misc/tim/timMan.c
index f2245a6a..4c61bf1c 100644
--- a/src/misc/tim/timMan.c
+++ b/src/misc/tim/timMan.c
@@ -93,13 +93,13 @@ Tim_Man_t * Tim_ManDup( Tim_Man_t * p, int fUnitDelay )
     // create new manager
     pNew = Tim_ManStart( p->nCis, p->nCos );
     // copy box connectivity information
-    memcpy( pNew->pCis, p->pCis, sizeof(Tim_Obj_t) * p->nCis );
-    memcpy( pNew->pCos, p->pCos, sizeof(Tim_Obj_t) * p->nCos );
+    memcpy( pNew->pCis, p->pCis, sizeof(Tim_Obj_t) * p->nCis ); // why do we need this?
+    memcpy( pNew->pCos, p->pCos, sizeof(Tim_Obj_t) * p->nCos ); // why do we need this?
     // clear traversal IDs
-    Tim_ManForEachCi( p, pObj, i )
-        pObj->TravId = 0;
-    Tim_ManForEachCo( p, pObj, i )
-        pObj->TravId = 0;
+    Tim_ManForEachCi( p, pObj, i ) // why do we need this?
+        pObj->TravId = 0;          // why do we need this?
+    Tim_ManForEachCo( p, pObj, i ) // why do we need this?
+        pObj->TravId = 0;          // why do we need this?
     if ( fUnitDelay )
     {
         // discretize PI arrival times
@@ -148,6 +148,83 @@ Tim_Man_t * Tim_ManDup( Tim_Man_t * p, int fUnitDelay )
 
 /**Function*************************************************************
 
+  Synopsis    [Trims the timing manager.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Tim_Man_t * Tim_ManTrim( Tim_Man_t * p, Vec_Int_t * vBoxPres )
+{
+    Tim_Man_t * pNew;
+    Tim_Box_t * pBox;
+    Tim_Obj_t * pObj;
+    float * pDelayTable, * pDelayTableNew;
+    int i, k, nInputs, nOutputs, nRemCis, nRemCos;
+    assert( Vec_IntSize(vBoxPres) == Tim_ManBoxNum(p) );
+    // count the number of CIs and COs due to removed boxes
+    Tim_ManForEachBox( p, pBox, i )
+        if ( Vec_IntEntry(vBoxPres, i) == 0 )
+        {
+            nRemCis += pBox->nOutputs;
+            nRemCos += pBox->nInputs;
+        }
+    if ( nRemCos == 0 && nRemCis == 0 )
+        return Tim_ManDup( p, 0 );
+    assert( Tim_ManCiNum(p) - Tim_ManPiNum(p) >= nRemCis );
+    assert( Tim_ManCoNum(p) - Tim_ManPoNum(p) >= nRemCos );
+    // create new manager
+    pNew = Tim_ManStart( p->nCis - nRemCis, p->nCos - nRemCos );
+    // copy box connectivity information
+    memcpy( pNew->pCis, p->pCis, sizeof(Tim_Obj_t) * p->nCis ); // why do we need this?
+    memcpy( pNew->pCos, p->pCos, sizeof(Tim_Obj_t) * p->nCos ); // why do we need this?
+    // clear traversal IDs
+    Tim_ManForEachCi( p, pObj, i ) // why do we need this?
+        pObj->TravId = 0;          // why do we need this?
+    Tim_ManForEachCo( p, pObj, i ) // why do we need this?
+        pObj->TravId = 0;          // why do we need this?
+    // duplicate delay tables
+    if ( Tim_ManDelayTableNum(p) > 0 )
+    {
+        pNew->vDelayTables = Vec_PtrStart( Vec_PtrSize(p->vDelayTables) );
+        Tim_ManForEachTable( p, pDelayTable, i )
+        {
+            if ( pDelayTable == NULL )
+                continue;
+            assert( i == (int)pDelayTable[0] );
+            nInputs   = (int)pDelayTable[1];
+            nOutputs  = (int)pDelayTable[2];
+            pDelayTableNew = ABC_ALLOC( float, 3 + nInputs * nOutputs );
+            pDelayTableNew[0] = (int)pDelayTable[0];
+            pDelayTableNew[1] = (int)pDelayTable[1];
+            pDelayTableNew[2] = (int)pDelayTable[2];
+            for ( k = 0; k < nInputs * nOutputs; k++ )
+                pDelayTableNew[3+k] = pDelayTable[3+k];
+//            assert( (int)pDelayTableNew[0] == Vec_PtrSize(pNew->vDelayTables) );
+            assert( Vec_PtrEntry(pNew->vDelayTables, i) == NULL );
+            Vec_PtrWriteEntry( pNew->vDelayTables, i, pDelayTableNew );
+//printf( "Finished duplicating delay table %d.\n", i );
+        }
+    }
+    // duplicate boxes
+    if ( Tim_ManBoxNum(p) > 0 )
+    {
+        pNew->vBoxes = Vec_PtrAlloc( Tim_ManBoxNum(p) );
+        Tim_ManForEachBox( p, pBox, i )
+            if ( Vec_IntEntry(vBoxPres, i) )
+                Tim_ManCreateBox( pNew, pBox->Inouts[0], pBox->nInputs, 
+                    pBox->Inouts[pBox->nInputs], pBox->nOutputs, pBox->iDelayTable );
+    }
+    return pNew;
+
+}
+
+
+/**Function*************************************************************
+
   Synopsis    [Stops the timing manager.]
 
   Description []
@@ -392,6 +469,58 @@ void Tim_ManPrint( Tim_Man_t * p )
 
 /**Function*************************************************************
 
+  Synopsis    [Prints statistics of the timing manager.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Tim_ManPrintStats( Tim_Man_t * p )
+{
+    Tim_Box_t * pBox;
+    Vec_Int_t * vCounts;
+    Vec_Ptr_t * vBoxes;
+    int i, Count, IdMax;
+    if ( p == NULL )
+        return;
+    Abc_Print( 1, "hierarchy      :  " );
+    printf( "PI/CI = %d/%d   PO/CO = %d/%d   Box = %d", 
+        Tim_ManPiNum(p), Tim_ManCiNum(p), 
+        Tim_ManPoNum(p), Tim_ManCoNum(p), 
+        Tim_ManBoxNum(p) );
+    printf( "\n" );
+    if ( Tim_ManBoxNum(p) == 0 )
+        return;
+    IdMax = 0;
+    Tim_ManForEachBox( p, pBox, i )
+        IdMax = Abc_MaxInt( IdMax, pBox->iDelayTable );
+    vCounts = Vec_IntStart( IdMax+1 );
+    vBoxes  = Vec_PtrStart( IdMax+1 );
+    Tim_ManForEachBox( p, pBox, i )
+    {
+        Vec_IntAddToEntry( vCounts, pBox->iDelayTable, 1 );
+        Vec_PtrWriteEntry( vBoxes, pBox->iDelayTable, pBox );
+    }
+    // print statistics about boxes
+    Vec_IntForEachEntry( vCounts, Count, i )
+    {
+        if ( Count == 0 ) continue;
+        pBox = (Tim_Box_t *)Vec_PtrEntry( vBoxes, i );
+        printf( "    Box %4d      ", i );
+        printf( "Num = %4d   ", Count );
+        printf( "Ins = %4d   ", pBox->nInputs );
+        printf( "Outs = %4d",   pBox->nOutputs );
+        printf( "\n" );
+    }
+    Vec_IntFree( vCounts );
+    Vec_PtrFree( vBoxes );
+}
+
+/**Function*************************************************************
+
   Synopsis    [Read parameters.]
 
   Description []