Extending and improving timing manager.

5 files changed, 30 insertions, 436 deletions

diff --git a/src/map/mio/mio.h b/src/map/mio/mio.h
index 1e3e4d43..669f8bc7 100644
--- a/src/map/mio/mio.h
+++ b/src/map/mio/mio.h
@@ -151,9 +151,11 @@ extern char *            Mio_GateReadSop           ( Mio_Gate_t * pGate );
 extern Vec_Int_t *       Mio_GateReadExpr          ( Mio_Gate_t * pGate );      
 extern word              Mio_GateReadTruth         ( Mio_Gate_t * pGate );
 extern int               Mio_GateReadValue         ( Mio_Gate_t * pGate );
+extern int               Mio_GateReadCell          ( Mio_Gate_t * pGate );
 extern char *            Mio_GateReadPinName       ( Mio_Gate_t * pGate, int iPin );
 extern float             Mio_GateReadPinDelay      ( Mio_Gate_t * pGate, int iPin );
 extern void              Mio_GateSetValue          ( Mio_Gate_t * pGate, int Value );
+extern void              Mio_GateSetCell           ( Mio_Gate_t * pGate, int Cell );
 extern int               Mio_GateIsInv             ( Mio_Gate_t * pGate );
 extern char *            Mio_PinReadName           ( Mio_Pin_t * pPin );  
 extern Mio_PinPhase_t    Mio_PinReadPhase          ( Mio_Pin_t * pPin );  
diff --git a/src/map/scl/sclCon.h b/src/map/scl/sclCon.h
index 7a7be1b2..fd6ae273 100644
--- a/src/map/scl/sclCon.h
+++ b/src/map/scl/sclCon.h
@@ -17,6 +17,9 @@
   Revision    [$Id: sclCon.h,v 1.0 2012/08/24 00:00:00 alanmi Exp $]
 
 ***********************************************************************/
+ 
+#ifndef ABC__scl_Con__h
+#define ABC__scl_Con__h
 
 ABC_NAMESPACE_HEADER_START
 
@@ -279,11 +282,11 @@ static inline float  Scl_ConGetOutReqFloat( int i )   { return Scl_Wrd2Flt( Scl_
 static inline float  Scl_ConGetOutLoadFloat( int i )  { return Scl_Wrd2Flt( Scl_ConGetOutLoad(i) );       }
 
 
+ABC_NAMESPACE_HEADER_END
+
+#endif
+
 ////////////////////////////////////////////////////////////////////////
 ///                       END OF FILE                                ///
 ////////////////////////////////////////////////////////////////////////
 
-
-ABC_NAMESPACE_HEADER_END
-
-
diff --git a/src/opt/sfm/sfmDec.c b/src/opt/sfm/sfmDec.c
index 536a8bb3..1240a256 100644
--- a/src/opt/sfm/sfmDec.c
+++ b/src/opt/sfm/sfmDec.c
@@ -25,6 +25,8 @@
 #include "misc/util/utilTruth.h"
 #include "opt/dau/dau.h"
 #include "map/mio/exp.h"
+#include "map/scl/sclCon.h"
+#include "base/main/main.h"
 
 ABC_NAMESPACE_IMPL_START
 
@@ -212,10 +214,10 @@ p->timeLib = Abc_Clock();
 p->timeLib = Abc_Clock() - p->timeLib;
     if ( !pPars->fArea )
     {
-        if ( p->pMit )
-            p->pMit = Sfm_MitStart( pLib, NULL, pNtk, p->DeltaCrit );
+        if ( Abc_FrameReadLibScl() )
+            p->pMit = Sfm_MitStart( pLib, (SC_Lib *)Abc_FrameReadLibScl(), Scl_ConReadMan(), pNtk, p->DeltaCrit );
         else
-            p->pTim = Sfm_TimStart( pLib, NULL, pNtk, p->DeltaCrit );
+            p->pTim = Sfm_TimStart( pLib, Scl_ConReadMan(), pNtk, p->DeltaCrit );
     }
     if ( pPars->fVeryVerbose )
 //    if ( pPars->fVerbose )
diff --git a/src/opt/sfm/sfmInt.h b/src/opt/sfm/sfmInt.h
index c2566deb..874db0e8 100644
--- a/src/opt/sfm/sfmInt.h
+++ b/src/opt/sfm/sfmInt.h
@@ -34,6 +34,7 @@
 #include "misc/vec/vec.h"
 #include "sat/bsat/satSolver.h"
 #include "misc/util/utilNam.h"
+#include "map/scl/sclLib.h"
 #include "map/scl/sclCon.h"
 #include "misc/st/st.h"
 #include "map/mio/mio.h"
@@ -226,7 +227,7 @@ extern int          Sfm_TimPriorityNodes( Sfm_Tim_t * p, Vec_Int_t * vCands, int
 extern int          Sfm_TimNodeIsNonCritical( Sfm_Tim_t * p, Abc_Obj_t * pPivot, Abc_Obj_t * pNode );
 extern int          Sfm_TimEvalRemapping( Sfm_Tim_t * p, Vec_Int_t * vFanins, Vec_Int_t * vMap, Mio_Gate_t * pGate1, char * pFans1, Mio_Gate_t * pGate2, char * pFans2 );
 /*=== sfmMit.c ==========================================================*/
-extern Sfm_Mit_t *  Sfm_MitStart( Mio_Library_t * pLib, Scl_Con_t * pExt, Abc_Ntk_t * pNtk, int DeltaCrit );
+extern Sfm_Mit_t *  Sfm_MitStart( Mio_Library_t * pLib, SC_Lib * pScl, Scl_Con_t * pExt, Abc_Ntk_t * pNtk, int DeltaCrit );
 extern void         Sfm_MitStop( Sfm_Mit_t * p );
 extern int          Sfm_MitReadNtkDelay( Sfm_Mit_t * p );
 extern int          Sfm_MitReadObjDelay( Sfm_Mit_t * p, int iObj );
diff --git a/src/opt/sfm/sfmMit.c b/src/opt/sfm/sfmMit.c
index 64ea0c0f..f36fce83 100644
--- a/src/opt/sfm/sfmMit.c
+++ b/src/opt/sfm/sfmMit.c
@@ -22,410 +22,25 @@
 
 ABC_NAMESPACE_IMPL_START
 
-
 ////////////////////////////////////////////////////////////////////////
 ///                        DECLARATIONS                              ///
 ////////////////////////////////////////////////////////////////////////
 
 struct Sfm_Mit_t_
 {
-    // external
-    Mio_Library_t *   pLib;        // library
-    Scl_Con_t *       pExt;        // external timing
-    Abc_Ntk_t *       pNtk;        // mapped network
-    int               Delay;       // the largest delay
-    int               DeltaCrit;   // critical delay delta
-    // timing info
-    Vec_Int_t         vTimArrs;    // arrivals (rise/fall)
-    Vec_Int_t         vTimReqs;    // required (rise/fall)
-    Vec_Int_t         vTimSlews;   // slews (rise/fall)
-    Vec_Int_t         vTimLoads;   // loads (rise/fall)
-    // timing edges
-    Vec_Int_t         vObjOffs;    // object offsets
-    Vec_Int_t         vTimEdges;   // edge timings (rise/fall)
-    // incremental timing
-    Vec_Wec_t         vLevels;     // levels
-    // critical path
-    Vec_Int_t         vPath;       // critical path
-    Vec_Wrd_t         vSortData;   // node priority order
+    int      Value1;
+    int      Value2;
+    int      Value3;
+    int      Value4;
 };
 
-static inline int * Sfm_MitArrId( Sfm_Mit_t * p, int Id )                    { return Vec_IntEntryP( &p->vTimArrs,  Abc_Var2Lit(Id, 0) );               }
-static inline int * Sfm_MitReqId( Sfm_Mit_t * p, int Id )                    { return Vec_IntEntryP( &p->vTimReqs,  Abc_Var2Lit(Id, 0) );               }
-static inline int * Sfm_MitSlewId( Sfm_Mit_t * p, int Id )                   { return Vec_IntEntryP( &p->vTimSlews, Abc_Var2Lit(Id, 0) );               }
-static inline int * Sfm_MitLoadId( Sfm_Mit_t * p, int Id )                   { return Vec_IntEntryP( &p->vTimLoads, Abc_Var2Lit(Id, 0) );               }
-
-static inline int * Sfm_MitArr( Sfm_Mit_t * p, Abc_Obj_t * pNode )           { return Vec_IntEntryP( &p->vTimArrs,  Abc_Var2Lit(Abc_ObjId(pNode), 0) ); }
-static inline int * Sfm_MitReq( Sfm_Mit_t * p, Abc_Obj_t * pNode )           { return Vec_IntEntryP( &p->vTimReqs,  Abc_Var2Lit(Abc_ObjId(pNode), 0) ); }
-static inline int * Sfm_MitSlew( Sfm_Mit_t * p, Abc_Obj_t * pNode )          { return Vec_IntEntryP( &p->vTimSlews, Abc_Var2Lit(Abc_ObjId(pNode), 0) ); }
-static inline int * Sfm_MitLoad( Sfm_Mit_t * p, Abc_Obj_t * pNode )          { return Vec_IntEntryP( &p->vTimLoads, Abc_Var2Lit(Abc_ObjId(pNode), 0) ); }
-
-static inline int   Sfm_MitArrMaxId( Sfm_Mit_t * p, int Id )                 { int * a = Sfm_MitArrId(p, Id); return Abc_MaxInt(a[0], a[1]);            }
-
-static inline int   Sfm_MitArrMax( Sfm_Mit_t * p, Abc_Obj_t * pNode )        { int * a = Sfm_MitArr(p, pNode); return Abc_MaxInt(a[0], a[1]);           }
-static inline void  Sfm_MitSetReq( Sfm_Mit_t * p, Abc_Obj_t * pNode, int t ) { int * r = Sfm_MitReq(p, pNode); r[0] = r[1] = t;                         }
-static inline int   Sfm_MitSlack( Sfm_Mit_t * p, Abc_Obj_t * pNode )         { int * r = Sfm_MitReq(p, pNode), * a = Sfm_MitArr(p, pNode); return Abc_MinInt(r[0]-a[0], r[1]-a[1]); }
-
 ////////////////////////////////////////////////////////////////////////
 ///                     FUNCTION DEFINITIONS                         ///
 ////////////////////////////////////////////////////////////////////////
 
 /**Function*************************************************************
 
-  Synopsis    []
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-static inline void Sfm_MitEdgeArrival( Sfm_Mit_t * p, Mio_Pin_t * pPin, int * pTimeIn, int * pTimeOut )
-{
-    Mio_PinPhase_t PinPhase = Mio_PinReadPhase(pPin);
-    int tDelayBlockRise = (int)(MIO_NUM*Mio_PinReadDelayBlockRise(pPin));  
-    int tDelayBlockFall = (int)(MIO_NUM*Mio_PinReadDelayBlockFall(pPin));  
-    if ( PinPhase != MIO_PHASE_INV )  // NONINV phase is present
-    {
-        pTimeOut[0] = Abc_MaxInt( pTimeOut[0], pTimeIn[0] + tDelayBlockRise );
-        pTimeOut[1] = Abc_MaxInt( pTimeOut[1], pTimeIn[1] + tDelayBlockFall );
-    }
-    if ( PinPhase != MIO_PHASE_NONINV )  // INV phase is present
-    {
-        pTimeOut[0] = Abc_MaxInt( pTimeOut[0], pTimeIn[1] + tDelayBlockRise );
-        pTimeOut[1] = Abc_MaxInt( pTimeOut[1], pTimeIn[0] + tDelayBlockFall );
-    }
-}
-static inline void Sfm_MitGateArrival( Sfm_Mit_t * p, Mio_Gate_t * pGate, int ** pTimesIn, int * pTimeOut )
-{
-    Mio_Pin_t * pPin;  int i = 0;
-    pTimeOut[0] = pTimeOut[1] = 0;
-    Mio_GateForEachPin( pGate, pPin )
-        Sfm_MitEdgeArrival( p, pPin, pTimesIn[i++], pTimeOut );
-    assert( i == Mio_GateReadPinNum(pGate) );
-}
-static inline void Sfm_MitNodeArrival( Sfm_Mit_t * p, Abc_Obj_t * pNode )
-{
-    int i, iFanin, * pTimesIn[6];
-    int * pTimeOut = Sfm_MitArr(p, pNode);
-    assert( Abc_ObjFaninNum(pNode) <= 6 );
-    Abc_ObjForEachFaninId( pNode, iFanin, i )
-        pTimesIn[i] = Sfm_MitArrId( p, iFanin );
-    Sfm_MitGateArrival( p, (Mio_Gate_t *)pNode->pData, pTimesIn, pTimeOut );
-}
-
-static inline void Sfm_MitEdgeRequired( Sfm_Mit_t * p, Mio_Pin_t * pPin, int * pTimeIn, int * pTimeOut )
-{
-    Mio_PinPhase_t PinPhase = Mio_PinReadPhase(pPin);
-    int tDelayBlockRise = (int)(MIO_NUM*Mio_PinReadDelayBlockRise(pPin));  
-    int tDelayBlockFall = (int)(MIO_NUM*Mio_PinReadDelayBlockFall(pPin));  
-    if ( PinPhase != MIO_PHASE_INV )  // NONINV phase is present
-    {
-        pTimeIn[0] = Abc_MinInt( pTimeIn[0], pTimeOut[0] - tDelayBlockRise );
-        pTimeIn[1] = Abc_MinInt( pTimeIn[1], pTimeOut[1] - tDelayBlockFall );
-    }
-    if ( PinPhase != MIO_PHASE_NONINV )  // INV phase is present
-    {
-        pTimeIn[0] = Abc_MinInt( pTimeIn[0], pTimeOut[1] - tDelayBlockRise );
-        pTimeIn[1] = Abc_MinInt( pTimeIn[1], pTimeOut[0] - tDelayBlockFall );
-    }
-}
-static inline void Sfm_MitGateRequired( Sfm_Mit_t * p, Mio_Gate_t * pGate, int ** pTimesIn, int * pTimeOut )
-{
-    Mio_Pin_t * pPin;  int i = 0;
-    Mio_GateForEachPin( pGate, pPin )
-        Sfm_MitEdgeRequired( p, pPin, pTimesIn[i++], pTimeOut );
-    assert( i == Mio_GateReadPinNum(pGate) );
-}
-void Sfm_MitNodeRequired( Sfm_Mit_t * p, Abc_Obj_t * pNode )
-{
-    int i, iFanin, * pTimesIn[6];
-    int * pTimeOut = Sfm_MitReq(p, pNode);
-    assert( Abc_ObjFaninNum(pNode) <= 6 );
-    Abc_ObjForEachFaninId( pNode, iFanin, i )
-        pTimesIn[i] = Sfm_MitReqId( p, iFanin );
-    Sfm_MitGateRequired( p, (Mio_Gate_t *)pNode->pData, pTimesIn, pTimeOut );
-}
-
-
-/**Function*************************************************************
-
-  Synopsis    []
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-void Sfm_MitCriticalPath_int( Sfm_Mit_t * p, Abc_Obj_t * pObj, Vec_Int_t * vPath, int SlackMax )
-{
-    Abc_Obj_t * pNext; int i;
-    if ( Abc_NodeIsTravIdCurrent( pObj ) )
-        return;
-    Abc_NodeSetTravIdCurrent( pObj );
-    assert( Abc_ObjIsNode(pObj) );
-    Abc_ObjForEachFanin( pObj, pNext, i )
-    {
-        if ( Abc_ObjIsCi(pNext) || Abc_ObjFaninNum(pNext) == 0 )
-            continue;
-        assert( Abc_ObjIsNode(pNext) );
-        if ( Sfm_MitSlack(p, pNext) <= SlackMax )
-            Sfm_MitCriticalPath_int( p, pNext, vPath, SlackMax );
-    }
-    if ( Abc_ObjFaninNum(pObj) > 0 )
-        Vec_IntPush( vPath, Abc_ObjId(pObj) );
-}
-int Sfm_MitCriticalPath( Sfm_Mit_t * p, int Window )
-{
-    int i, SlackMax = p->Delay * Window / 100;
-    Abc_Obj_t * pObj, * pNext; 
-    Vec_IntClear( &p->vPath );
-    Abc_NtkIncrementTravId( p->pNtk ); 
-    Abc_NtkForEachCo( p->pNtk, pObj, i )
-    {
-        pNext = Abc_ObjFanin0(pObj);
-        if ( Abc_ObjIsCi(pNext) || Abc_ObjFaninNum(pNext) == 0 )
-            continue;
-        assert( Abc_ObjIsNode(pNext) );
-        if ( Sfm_MitSlack(p, pNext) <= SlackMax )
-            Sfm_MitCriticalPath_int( p, pNext, &p->vPath, SlackMax );
-    }
-    return Vec_IntSize(&p->vPath);
-}
-
-/**Function*************************************************************
-
-  Synopsis    []
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-int Sfm_MitTrace( Sfm_Mit_t * p )
-{
-    Abc_Obj_t * pObj; int i, Delay = 0;
-    Vec_Ptr_t * vNodes = Abc_NtkDfs( p->pNtk, 1 );
-    Vec_PtrForEachEntry( Abc_Obj_t *, vNodes, pObj, i )
-        Sfm_MitNodeArrival( p, pObj );
-    Abc_NtkForEachCo( p->pNtk, pObj, i )
-        Delay = Abc_MaxInt( Delay, Sfm_MitArrMax(p, Abc_ObjFanin0(pObj)) );
-    Vec_IntFill( &p->vTimReqs, 2*Abc_NtkObjNumMax(p->pNtk), ABC_INFINITY );
-    Abc_NtkForEachCo( p->pNtk, pObj, i )
-        Sfm_MitSetReq( p, Abc_ObjFanin0(pObj), Delay );
-    Vec_PtrForEachEntryReverse( Abc_Obj_t *, vNodes, pObj, i )
-        Sfm_MitNodeRequired( p, pObj );
-    Vec_PtrFree( vNodes );
-    return Delay;
-}
-
-/**Function*************************************************************
-
-  Synopsis    []
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Sfm_Mit_t * Sfm_MitStart( Mio_Library_t * pLib, Scl_Con_t * pExt, Abc_Ntk_t * pNtk, int DeltaCrit )
-{
-//    Abc_Obj_t * pObj; int i;
-    Sfm_Mit_t * p = ABC_CALLOC( Sfm_Mit_t, 1 );
-    p->pLib = pLib;
-    p->pExt = pExt;
-    p->pNtk = pNtk;
-    Vec_IntFill( &p->vTimArrs,  3*Abc_NtkObjNumMax(pNtk), 0 );
-    Vec_IntFill( &p->vTimReqs,  3*Abc_NtkObjNumMax(pNtk), 0 );
-//    Vec_IntFill( &p->vTimSlews, 3*Abc_NtkObjNumMax(pNtk), 0 );
-//    Vec_IntFill( &p->vTimLoads, 3*Abc_NtkObjNumMax(pNtk), 0 );
-//    Vec_IntFill( &p->vObjOffs,  2*Abc_NtkObjNumMax(pNtk), 0 );
-//    Abc_NtkForEachNode( pNtk, pObj, i )
-//    {
-//        Vec_IntWriteEntry( &p->vObjOffs, i, Vec_IntSize(Vec_IntSize(&p->vTimEdges)) );
-//        Vec_IntFillExtra( &p->vTimEdges, Vec_IntSize(Vec_IntSize(&p->vTimEdges)) + Abc_ObjFaninNum(pObj), 0 );
-//    }
-    p->Delay = Sfm_MitTrace( p );
-    assert( DeltaCrit > 0 && DeltaCrit < MIO_NUM*1000 );
-    p->DeltaCrit = DeltaCrit;
-    return p;
-}
-void Sfm_MitStop( Sfm_Mit_t * p )
-{
-    Vec_IntErase( &p->vTimArrs );
-    Vec_IntErase( &p->vTimReqs );
-    Vec_IntErase( &p->vTimSlews );
-    Vec_IntErase( &p->vTimLoads );
-    Vec_IntErase( &p->vObjOffs );
-    Vec_IntErase( &p->vTimEdges );
-    Vec_WecErase( &p->vLevels );
-    Vec_IntErase( &p->vPath );
-    Vec_WrdErase( &p->vSortData );
-    ABC_FREE( p );
-}
-int Sfm_MitReadNtkDelay( Sfm_Mit_t * p )
-{
-    return p->Delay;
-}
-int Sfm_MitReadObjDelay( Sfm_Mit_t * p, int iObj )
-{
-    return Sfm_MitArrMaxId(p, iObj);
-}
-
-/**Function*************************************************************
-
-  Synopsis    []
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-void Sfm_MitTest( Abc_Ntk_t * pNtk )
-{
-    Mio_Library_t * pLib = (Mio_Library_t *)pNtk->pManFunc;
-    Sfm_Mit_t * p = Sfm_MitStart( pLib, NULL, pNtk, 100 );
-    printf( "Max delay = %.2f.  Path = %d (%d).\n", MIO_NUMINV*p->Delay, Sfm_MitCriticalPath(p, 1), Abc_NtkNodeNum(p->pNtk) );
-    Sfm_MitStop( p );
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Levelized structure.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-static inline void Sfm_MitUpdateClean( Sfm_Mit_t * p )
-{
-    Vec_Int_t * vLevel;
-    Abc_Obj_t * pObj;
-    int i, k;
-    Vec_WecForEachLevel( &p->vLevels, vLevel, i )
-    {
-        Abc_NtkForEachObjVec( vLevel, p->pNtk, pObj, k )
-        {
-            assert( pObj->fMarkC == 1 );
-            pObj->fMarkC = 0;
-        }
-        Vec_IntClear( vLevel );
-    }
-}
-
-/**Function*************************************************************
-
-  Synopsis    []
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-void Sfm_MitUpdateTiming( Sfm_Mit_t * p, Vec_Int_t * vTimeNodes )
-{
-    assert( Vec_IntSize(vTimeNodes) > 0 && Vec_IntSize(vTimeNodes) <= 2 );
-    Vec_IntFillExtra( &p->vTimArrs, 2*Abc_NtkObjNumMax(p->pNtk), 0 );
-    Vec_IntFillExtra( &p->vTimReqs, 2*Abc_NtkObjNumMax(p->pNtk), 0 );
-    p->Delay = Sfm_MitTrace( p );
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Sort an array of nodes using their max arrival times.]
-
-  Description [Returns the number of new divisor nodes.]
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-int Sfm_MitSortArrayByArrival( Sfm_Mit_t * p, Vec_Int_t * vNodes, int iPivot )
-{
-    word Entry; 
-    int i, Id, nDivNew = -1; 
-    int MaxDelay = Sfm_MitArrMaxId(p, iPivot);
-    assert( p->DeltaCrit > 0 );
-    // collect nodes
-    Vec_WrdClear( &p->vSortData );
-    Vec_IntForEachEntry( vNodes, Id, i )
-        Vec_WrdPush( &p->vSortData, ((word)Id << 32) | Sfm_MitArrMaxId(p, Id) );
-    // sort nodes by delay
-    Abc_QuickSort3( Vec_WrdArray(&p->vSortData), Vec_WrdSize(&p->vSortData), 0 );
-    // collect sorted nodes and find place where divisors end
-    Vec_IntClear( vNodes );
-    Vec_WrdForEachEntry( &p->vSortData, Entry, i )
-    {
-        Vec_IntPush( vNodes, (int)(Entry >> 32) );
-        if ( nDivNew == -1 && ((int)Entry) + p->DeltaCrit > MaxDelay )
-            nDivNew = i;
-    }
-    return nDivNew;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Priority of nodes to try remapping for delay.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-int Sfm_MitPriorityNodes( Sfm_Mit_t * p, Vec_Int_t * vCands, int Window )
-{
-    Vec_Int_t * vLevel;
-    Abc_Obj_t * pObj;
-    int i, k;
-    assert( Window >= 0 && Window <= 100 );
-    // collect critical path
-    Sfm_MitCriticalPath( p, Window );
-    // add nodes to the levelized structure
-    Sfm_MitUpdateClean( p );
-    Abc_NtkForEachObjVec( &p->vPath, p->pNtk, pObj, i )
-    {
-        assert( pObj->fMarkC == 0 );
-        pObj->fMarkC = 1;
-        Vec_WecPush( &p->vLevels, Abc_ObjLevel(pObj), Abc_ObjId(pObj) );
-    }
-    // prioritize nodes by expected gain
-    Vec_WecSort( &p->vLevels, 0 );
-    Vec_IntClear( vCands );
-    Vec_WecForEachLevel( &p->vLevels, vLevel, i )
-    {
-//        printf( "%d ", Vec_IntSize(vLevel) );
-        Abc_NtkForEachObjVec( vLevel, p->pNtk, pObj, k )
-            if ( !pObj->fMarkA )
-                Vec_IntPush( vCands, Abc_ObjId(pObj) );
-//        if ( Vec_IntSize(vCands) > 10 )
-//            break;
-    }
-//    printf( "\n" );
-//    printf( "Path = %5d   ", Vec_IntSize(&p->vPath) );
-//    printf( "Cand = %5d   ", Vec_IntSize(vCands) );
-    return Vec_IntSize(vCands) > 0;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Returns 1 if node is relatively non-critical compared to the pivot.]
+  Synopsis    [Temporary place holders.]
 
   Description []
                
@@ -434,44 +49,15 @@ int Sfm_MitPriorityNodes( Sfm_Mit_t * p, Vec_Int_t * vCands, int Window )
   SeeAlso     []
 
 ***********************************************************************/
-int Sfm_MitNodeIsNonCritical( Sfm_Mit_t * p, Abc_Obj_t * pPivot, Abc_Obj_t * pNode )
-{
-    return Sfm_MitArrMax(p, pNode) + p->DeltaCrit <= Sfm_MitArrMax(p, pPivot);
-}
-
-/**Function*************************************************************
-
-  Synopsis    []
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-int Sfm_MitEvalRemapping( Sfm_Mit_t * p, Vec_Int_t * vFanins, Vec_Int_t * vMap, Mio_Gate_t * pGate1, char * pFans1, Mio_Gate_t * pGate2, char * pFans2 )
-{
-    int TimeOut[2][2];
-    int * pTimesIn1[6], * pTimesIn2[6];
-    int i, nFanins1, nFanins2;
-    // process the first gate
-    nFanins1 = Mio_GateReadPinNum( pGate1 );
-    for ( i = 0; i < nFanins1; i++ )
-        pTimesIn1[i] = Sfm_MitArrId( p, Vec_IntEntry(vMap, Vec_IntEntry(vFanins, (int)pFans1[i])) );
-    Sfm_MitGateArrival( p, pGate1, pTimesIn1, TimeOut[0] );
-    if ( pGate2 == NULL )
-        return Abc_MaxInt(TimeOut[0][0], TimeOut[0][1]);
-    // process the second gate
-    nFanins2 = Mio_GateReadPinNum( pGate2 );
-    for ( i = 0; i < nFanins2; i++ )
-        if ( (int)pFans2[i] == 16 )
-            pTimesIn2[i] = TimeOut[0];
-        else
-            pTimesIn2[i] = Sfm_MitArrId( p, Vec_IntEntry(vMap, Vec_IntEntry(vFanins, (int)pFans2[i])) );
-    Sfm_MitGateArrival( p, pGate2, pTimesIn2, TimeOut[1] );
-    return Abc_MaxInt(TimeOut[1][0], TimeOut[1][1]);
-}
+Sfm_Mit_t *  Sfm_MitStart( Mio_Library_t * pLib, SC_Lib * pScl, Scl_Con_t * pExt, Abc_Ntk_t * pNtk, int DeltaCrit ) { return NULL; }
+void         Sfm_MitStop( Sfm_Mit_t * p )                                                           {}
+int          Sfm_MitReadNtkDelay( Sfm_Mit_t * p )                                                   { return 0;}
+int          Sfm_MitReadObjDelay( Sfm_Mit_t * p, int iObj )                                         { return 0;}
+void         Sfm_MitUpdateTiming( Sfm_Mit_t * p, Vec_Int_t * vTimeNodes )                           {}
+int          Sfm_MitSortArrayByArrival( Sfm_Mit_t * p, Vec_Int_t * vNodes, int iPivot )             { return 0;}
+int          Sfm_MitPriorityNodes( Sfm_Mit_t * p, Vec_Int_t * vCands, int Window )                  { return 0;}
+int          Sfm_MitNodeIsNonCritical( Sfm_Mit_t * p, Abc_Obj_t * pPivot, Abc_Obj_t * pNode )       { return 0;}
+int          Sfm_MitEvalRemapping( Sfm_Mit_t * p, Vec_Int_t * vFanins, Vec_Int_t * vMap, Mio_Gate_t * pGate1, char * pFans1, Mio_Gate_t * pGate2, char * pFans2 ) { return 0;}
 
 
 ////////////////////////////////////////////////////////////////////////