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Commit f7c969ca by Alan Mishchenko
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Improvements to timing optimization.

parent 71847b9d
Showing with 104 additions and 39 deletions
src/base/abc/abc.h
......@@ -646,6 +646,7 @@ extern ABC_DLL void Abc_ObjAddFanin( Abc_Obj_t * pObj, Abc_Obj_t *
extern ABC_DLL void Abc_ObjDeleteFanin( Abc_Obj_t * pObj, Abc_Obj_t * pFanin );
extern ABC_DLL void Abc_ObjRemoveFanins( Abc_Obj_t * pObj );
extern ABC_DLL void Abc_ObjPatchFanin( Abc_Obj_t * pObj, Abc_Obj_t * pFaninOld, Abc_Obj_t * pFaninNew );
extern ABC_DLL void Abc_ObjPatchFanoutFanin( Abc_Obj_t * pObj, int iObjNew );
extern ABC_DLL Abc_Obj_t * Abc_ObjInsertBetween( Abc_Obj_t * pNodeIn, Abc_Obj_t * pNodeOut, Abc_ObjType_t Type );
extern ABC_DLL void Abc_ObjTransferFanout( Abc_Obj_t * pObjOld, Abc_Obj_t * pObjNew );
extern ABC_DLL void Abc_ObjReplace( Abc_Obj_t * pObjOld, Abc_Obj_t * pObjNew );
......
src/base/abc/abcFanio.c
......@@ -211,6 +211,34 @@ void Abc_ObjPatchFanin( Abc_Obj_t * pObj, Abc_Obj_t * pFaninOld, Abc_Obj_t * pFa
/**Function*************************************************************
Synopsis [Replaces pObj by iObjNew in the fanin arrays of the fanouts.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_ObjPatchFanoutFanin( Abc_Obj_t * pObj, int iObjNew )
{
Abc_Obj_t * pFanout;
int i, k, Entry;
// update fanouts of the node to point to this one
Abc_ObjForEachFanout( pObj, pFanout, i )
{
Vec_IntForEachEntry( &pFanout->vFanins, Entry, k )
if ( Entry == (int)Abc_ObjId(pObj) )
{
Vec_IntWriteEntry( &pFanout->vFanins, k, iObjNew );
break;
}
assert( k < Vec_IntSize(&pFanout->vFanins) );
}
}
/**Function*************************************************************
Synopsis [Inserts one-input node of the type specified between the nodes.]
Description []
......
src/map/scl/scl.c
......@@ -753,7 +753,7 @@ int Scl_CommandStime( Abc_Frame_t * pAbc, int argc, char **argv )
{
int c;
int fShowAll = 0;
int fUseWireLoads = 1;
int fUseWireLoads = 0;
int fPrintPath = 0;
int fDumpStats = 0;
int nTreeCRatio = 0;
......
src/map/scl/sclCon.h
......@@ -38,7 +38,8 @@ struct Scl_Con_t_
word tInLoadDef; // default input load
word tOutReqDef; // default output required time
word tOutLoadDef; // default output load
Vec_Ptr_t vInCells; // input driving gates
Vec_Ptr_t vInCells; // input driving gate names
Vec_Ptr_t vInCellsPtr; // input driving gates
Vec_Wrd_t vInArrs; // input arrival times
Vec_Wrd_t vInSlews; // input slews
Vec_Wrd_t vInLoads; // input loads
......@@ -58,8 +59,8 @@ struct Scl_Con_t_
#define SCL_DIRECTIVE(ITEM) "."ITEM
#define SCL_DEF_DIRECTIVE(ITEM) ".default_"ITEM
#define SCL_NUM 1000000
#define SCL_NUMINV 0.000001
#define SCL_NUM 1000
#define SCL_NUMINV 0.001
#define SCL_INFINITY (~(word)0)
static inline word Scl_Flt2Wrd( float w ) { return SCL_NUM*w; }
......@@ -103,6 +104,7 @@ static inline Scl_Con_t * Scl_ConAlloc( char * pFileName, Abc_Nam_t * pNamI, Abc
}
static inline void Scl_ConFree( Scl_Con_t * p )
{
Vec_PtrErase( &p->vInCellsPtr );
Vec_PtrFreeData( &p->vInCells );
Vec_PtrErase( &p->vInCells );
Vec_WrdErase( &p->vInArrs );
......
src/map/scl/sclLib.h
......@@ -180,8 +180,8 @@ struct SC_Pin_
float cap; // -- this value is used if 'rise_cap' and 'fall_cap' is missing (copied by 'postProcess()'). (not used)
float rise_cap; // }- used for input pins ('cap' too).
float fall_cap; // }
float rise_capI; // }- used for input pins ('cap' too).
float fall_capI; // }
int rise_capI; // }- used for input pins ('cap' too).
int fall_capI; // }
float max_out_cap; // } (not used)
float max_out_slew; // }- used only for output pins (max values must not be exceeded or else mapping is illegal) (not used)
char * func_text; // }
......@@ -199,8 +199,8 @@ struct SC_Cell_
int unsupp; // -- set to TRUE by parser if cell contains information we cannot handle
float area;
float leakage;
float areaI;
float leakageI;
int areaI;
int leakageI;
int drive_strength; // -- some library files provide this field (currently unused, but may be a good hint for sizing) (not used)
Vec_Ptr_t vPins; // NamedSet<SC_Pin>
int n_inputs; // -- 'pins[0 .. n_inputs-1]' are input pins
......
src/map/scl/sclLibScl.c
......@@ -173,8 +173,8 @@ static int Abc_SclReadLibrary( Vec_Str_t * vOut, int * pPos, SC_Lib * p )
pPin->rise_cap = Vec_StrGetF(vOut, pPos);
pPin->fall_cap = Vec_StrGetF(vOut, pPos);
pPin->rise_capI = (int)(MIO_NUM*pPin->rise_capI);
pPin->fall_capI = (int)(MIO_NUM*pPin->fall_capI);
pPin->rise_capI = (int)(MIO_NUM*pPin->rise_cap);
pPin->fall_capI = (int)(MIO_NUM*pPin->fall_cap);
}
for ( j = 0; j < pCell->n_outputs; j++ )
......
src/opt/sfm/sfmDec.c
......@@ -93,6 +93,7 @@ struct Sfm_Dec_t_
// temporary
Vec_Int_t vTemp;
Vec_Int_t vTemp2;
Vec_Int_t vTemp3;
Vec_Int_t vCands;
word Copy[4];
int nSuppVars;
......@@ -103,6 +104,7 @@ struct Sfm_Dec_t_
abctime timeSat;
abctime timeSatSat;
abctime timeSatUnsat;
abctime timeEval;
abctime timeTime;
abctime timeOther;
abctime timeStart;
......@@ -146,6 +148,9 @@ static inline word Sfm_DecObjSim2( Sfm_Dec_t * p, Abc_Obj_t * pObj ) { r
static inline word * Sfm_DecDivPats( Sfm_Dec_t * p, int d, int c ) { return Vec_WrdEntryP(&p->vSets[c], d*SFM_SIM_WORDS); }
static inline int Sfm_ManReadObjDelay( Sfm_Dec_t * p, int Id ) { return p->pMit ? Sfm_MitReadObjDelay(p->pMit, Id) : Sfm_TimReadObjDelay(p->pTim, Id); }
static inline int Sfm_ManReadNtkDelay( Sfm_Dec_t * p ) { return p->pMit ? Sfm_MitReadNtkDelay(p->pMit) : Sfm_TimReadNtkDelay(p->pTim); }
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
......@@ -216,7 +221,7 @@ p->timeLib = Abc_Clock() - p->timeLib;
{
if ( Abc_FrameReadLibScl() )
p->pMit = Sfm_MitStart( pLib, (SC_Lib *)Abc_FrameReadLibScl(), Scl_ConReadMan(), pNtk, p->DeltaCrit );
else
if ( p->pMit == NULL )
p->pTim = Sfm_TimStart( pLib, Scl_ConReadMan(), pNtk, p->DeltaCrit );
}
if ( pPars->fVeryVerbose )
......@@ -277,6 +282,7 @@ void Sfm_DecStop( Sfm_Dec_t * p )
// temporary
Vec_IntErase( &p->vTemp );
Vec_IntErase( &p->vTemp2 );
Vec_IntErase( &p->vTemp3 );
Vec_IntErase( &p->vCands );
ABC_FREE( p );
pNtk->pData = NULL;
......@@ -704,6 +710,8 @@ int Sfm_DecMffcAreaReal( Abc_Obj_t * pPivot, Vec_Int_t * vCut, Vec_Int_t * vMffc
Abc_Obj_t * pObj;
int i, Area1, Area2;
assert( Abc_ObjIsNode(pPivot) );
if ( vMffc )
Vec_IntClear( vMffc );
Abc_NtkForEachObjVec( vCut, pNtk, pObj, i )
pObj->vFanouts.nSize++;
Area1 = Sfm_MffcDeref_rec( pPivot );
......@@ -1194,7 +1202,7 @@ int Sfm_DecPeformDec3( Sfm_Dec_t * p, Abc_Obj_t * pObj )
int nSupp[SFM_DEC_MAX], pAssump[SFM_WIN_MAX];
int fVeryVerbose = p->pPars->fPrintDecs || p->pPars->fVeryVerbose;
int nDecs = Abc_MaxInt(p->pPars->nDecMax, 1);
int i, k, DelayOrig = 0, DelayMin, nMatches, iBest = -1, RetValue, Prev = 0;
int i, k, DelayOrig = 0, DelayMin, GainMax, nMatches, iBest = -1, RetValue, Prev = 0;
Mio_Gate_t * pGate1Best = NULL, * pGate2Best = NULL;
char * pFans1Best = NULL, * pFans2Best = NULL;
assert( p->pPars->fArea == 0 );
......@@ -1208,6 +1216,7 @@ int Sfm_DecPeformDec3( Sfm_Dec_t * p, Abc_Obj_t * pObj )
Vec_IntClear( &p->vObjDec );
for ( i = 0; i < nDecs; i++ )
{
GainMax = 0;
DelayMin = DelayOrig = Sfm_ManReadObjDelay( p, Abc_ObjId(pObj) );
// reduce the variable array
if ( Vec_IntSize(&p->vObjDec) > Prev )
......@@ -1227,7 +1236,13 @@ int Sfm_DecPeformDec3( Sfm_Dec_t * p, Abc_Obj_t * pObj )
printf( "Dec %d: Pat0 = %2d Pat1 = %2d Supp = %d ", i, p->nPats[0], p->nPats[1], nSupp[i] );
if ( fVeryVerbose )
Dau_DsdPrintFromTruth( uTruth[i], nSupp[i] );
if ( nSupp[i] == 1 && uTruth[i][0] == ABC_CONST(0x5555555555555555) && DelayMin <= p->DelayInv + Sfm_ManReadObjDelay(p, Vec_IntEntry(&p->vObjMap, pSupp[i][0])) )
if ( p->pTim && nSupp[i] == 1 && uTruth[i][0] == ABC_CONST(0x5555555555555555) && DelayMin <= p->DelayInv + Sfm_ManReadObjDelay(p, Vec_IntEntry(&p->vObjMap, pSupp[i][0])) )
{
if ( fVeryVerbose )
printf( "Dec %d: Pat0 = %2d Pat1 = %2d NO DEC.\n", i, p->nPats[0], p->nPats[1] );
continue;
}
if ( p->pMit && nSupp[i] == 1 && uTruth[i][0] == ABC_CONST(0x5555555555555555) )
{
if ( fVeryVerbose )
printf( "Dec %d: Pat0 = %2d Pat1 = %2d NO DEC.\n", i, p->nPats[0], p->nPats[1] );
......@@ -1248,8 +1263,8 @@ int Sfm_DecPeformDec3( Sfm_Dec_t * p, Abc_Obj_t * pObj )
// get MFFC
if ( p->pMit )
{
Sfm_DecPrepareVec( &p->vObjMap, pSupp[i], nSupp[i], &p->vTemp );
Sfm_DecMffcAreaReal(pObj, &p->vTemp, &p->vTemp2 );
Sfm_DecPrepareVec( &p->vObjMap, pSupp[i], nSupp[i], &p->vTemp ); // returns cut in p->vTemp
Sfm_DecMffcAreaReal(pObj, &p->vTemp, &p->vTemp3 ); // returns MFFC in p->vTemp3
}
// try the delay
......@@ -1258,19 +1273,21 @@ int Sfm_DecPeformDec3( Sfm_Dec_t * p, Abc_Obj_t * pObj )
nMatches = Sfm_LibFindDelayMatches( p->pLib, uTruth[i], pSupp[i], nSupp[i], &p->vMatchGates, &p->vMatchFans );
for ( k = 0; k < nMatches; k++ )
{
abctime clk = Abc_Clock();
Mio_Gate_t * pGate1 = (Mio_Gate_t *)Vec_PtrEntry( &p->vMatchGates, 2*k+0 );
Mio_Gate_t * pGate2 = (Mio_Gate_t *)Vec_PtrEntry( &p->vMatchGates, 2*k+1 );
char * pFans1 = (char *)Vec_PtrEntry( &p->vMatchFans, 2*k+0 );
char * pFans2 = (char *)Vec_PtrEntry( &p->vMatchFans, 2*k+1 );
Vec_Int_t vFanins = { nSupp[i], nSupp[i], pSupp[i] };
int Delay;
// skip identical gate
//if ( pGate2 == NULL && pGate1 == (Mio_Gate_t *)pObj->pData )
// continue;
if ( p->pMit )
{
DelayMin = 0;
Delay = Sfm_MitEvalRemapping( p->pMit, &p->vTemp2, pObj, &vFanins, &p->vObjMap, pGate1, pFans1, pGate2, pFans2 );
if ( DelayMin < Delay )
int Gain = Sfm_MitEvalRemapping( p->pMit, &p->vTemp3, pObj, &vFanins, &p->vObjMap, pGate1, pFans1, pGate2, pFans2 );
if ( GainMax < Gain )
{
DelayMin = Delay;
GainMax = Gain;
pGate1Best = pGate1;
pGate2Best = pGate2;
pFans1Best = pFans1;
......@@ -1280,7 +1297,7 @@ int Sfm_DecPeformDec3( Sfm_Dec_t * p, Abc_Obj_t * pObj )
}
else
{
Delay = Sfm_TimEvalRemapping( p->pTim, &vFanins, &p->vObjMap, pGate1, pFans1, pGate2, pFans2 );
int Delay = Sfm_TimEvalRemapping( p->pTim, &vFanins, &p->vObjMap, pGate1, pFans1, pGate2, pFans2 );
if ( DelayMin > Delay )
{
DelayMin = Delay;
......@@ -1291,8 +1308,10 @@ int Sfm_DecPeformDec3( Sfm_Dec_t * p, Abc_Obj_t * pObj )
iBest = i;
}
}
p->timeEval += Abc_Clock() - clk;
}
}
//printf( "Gain max = %d.\n", GainMax );
Sfm_ObjSetdownSimInfo( pObj );
if ( iBest == -1 )
{
......@@ -1670,7 +1689,7 @@ printf( "\n" );
*/
return nDivs;
}
Abc_Obj_t * Sfm_DecInsert( Abc_Ntk_t * pNtk, Abc_Obj_t * pPivot, int Limit, Vec_Int_t * vGates, Vec_Wec_t * vFanins, Vec_Int_t * vMap, Vec_Ptr_t * vGateHandles, int GateBuf, int GateInv, Vec_Wrd_t * vFuncs, Vec_Int_t * vTimeNodes )
Abc_Obj_t * Sfm_DecInsert( Abc_Ntk_t * pNtk, Abc_Obj_t * pPivot, int Limit, Vec_Int_t * vGates, Vec_Wec_t * vFanins, Vec_Int_t * vMap, Vec_Ptr_t * vGateHandles, int GateBuf, int GateInv, Vec_Wrd_t * vFuncs, Vec_Int_t * vTimeNodes, Sfm_Mit_t * pMit )
{
Abc_Obj_t * pObjNew = NULL;
Vec_Int_t * vLevel;
......@@ -1687,6 +1706,10 @@ Abc_Obj_t * Sfm_DecInsert( Abc_Ntk_t * pNtk, Abc_Obj_t * pPivot, int Limit, Vec_
{
iObj = Vec_WecEntryEntry( vFanins, Limit, 0 );
pObjNew = Abc_NtkObj( pNtk, Vec_IntEntry(vMap, iObj) );
// transfer load
if ( pMit )
Sfm_MitTransferLoad( pMit, pObjNew, pPivot );
// replace logic cone
Abc_ObjReplace( pPivot, pObjNew );
// update level
pObjNew->Level = 0;
......@@ -1743,6 +1766,13 @@ Abc_Obj_t * Sfm_DecInsert( Abc_Ntk_t * pNtk, Abc_Obj_t * pPivot, int Limit, Vec_
if ( vTimeNodes )
Vec_IntPush( vTimeNodes, Abc_ObjId(pObjNew) );
}
// transfer load
if ( pMit )
{
Sfm_MitTimingGrow( pMit );
Sfm_MitTransferLoad( pMit, pObjNew, pPivot );
}
// replace logic cone
Abc_ObjReplace( pPivot, pObjNew );
// update level
Abc_NtkForEachObjVecStart( vMap, pNtk, pObjNew, i, Limit )
......@@ -1760,15 +1790,16 @@ void Sfm_DecPrintStats( Sfm_Dec_t * p )
p->timeTotal = Abc_Clock() - p->timeStart;
p->timeOther = p->timeTotal - p->timeLib - p->timeWin - p->timeCnf - p->timeSat - p->timeTime;
ABC_PRTP( "Lib ", p->timeLib , p->timeTotal );
ABC_PRTP( "Win ", p->timeWin , p->timeTotal );
ABC_PRTP( "Cnf ", p->timeCnf , p->timeTotal );
ABC_PRTP( "Sat ", p->timeSat , p->timeTotal );
ABC_PRTP( " Sat ", p->timeSatSat, p->timeTotal );
ABC_PRTP( " Unsat", p->timeSatUnsat, p->timeTotal );
ABC_PRTP( "Timing", p->timeTime , p->timeTotal );
ABC_PRTP( "Other ", p->timeOther, p->timeTotal );
ABC_PRTP( "ALL ", p->timeTotal, p->timeTotal );
ABC_PRTP( "Lib ", p->timeLib , p->timeTotal );
ABC_PRTP( "Win ", p->timeWin , p->timeTotal );
ABC_PRTP( "Cnf ", p->timeCnf , p->timeTotal );
ABC_PRTP( "Sat ", p->timeSat-p->timeEval, p->timeTotal );
ABC_PRTP( " Sat ", p->timeSatSat, p->timeTotal );
ABC_PRTP( " Unsat", p->timeSatUnsat, p->timeTotal );
ABC_PRTP( "Eval ", p->timeEval , p->timeTotal );
ABC_PRTP( "Timing", p->timeTime , p->timeTotal );
ABC_PRTP( "Other ", p->timeOther, p->timeTotal );
ABC_PRTP( "ALL ", p->timeTotal, p->timeTotal );
printf( "Cone sizes: " );
for ( i = 0; i <= SFM_SUPP_MAX; i++ )
......@@ -1883,7 +1914,7 @@ p->timeSat += Abc_Clock() - clk;
return NULL;
p->nNodesChanged++;
Abc_NtkCountStats( p, Limit );
return Sfm_DecInsert( pNtk, pObj, Limit, &p->vObjGates, &p->vObjFanins, &p->vObjMap, &p->vGateHands, p->GateBuffer, p->GateInvert, &p->vGateFuncs, NULL );
return Sfm_DecInsert( pNtk, pObj, Limit, &p->vObjGates, &p->vObjFanins, &p->vObjMap, &p->vGateHands, p->GateBuffer, p->GateInvert, &p->vGateFuncs, NULL, p->pMit );
}
void Abc_NtkAreaOpt( Sfm_Dec_t * p )
{
......@@ -1963,7 +1994,6 @@ void Abc_NtkDelayOpt( Sfm_Dec_t * p )
int OldId = Abc_ObjId(pObj);
int DelayOld = Sfm_ManReadObjDelay(p, OldId);
assert( pObj->fMarkA == 0 );
p->nNodesTried++;
clk = Abc_Clock();
p->nDivs = Sfm_DecExtract( pNtk, pPars, pObj, &p->vObjRoots, &p->vObjGates, &p->vObjFanins, &p->vObjMap, &p->vTemp, &p->vTemp2, &p->vObjMffc, &p->vObjInMffc, p->pTim, p->pMit );
......@@ -2028,8 +2058,8 @@ p->timeSat += Abc_Clock() - clk;
p->nNodesChanged++;
Abc_NtkCountStats( p, Limit );
// reduce load due to removed MFFC
if ( p->pMit ) Sfm_MitUpdateLoad( p->pMit, &p->vTemp2, 0 ); // assuming &p->vTemp2 contains MFFC
Sfm_DecInsert( pNtk, pObj, Limit, &p->vObjGates, &p->vObjFanins, &p->vObjMap, &p->vGateHands, p->GateBuffer, p->GateInvert, &p->vGateFuncs, &p->vTemp );
if ( p->pMit ) Sfm_MitUpdateLoad( p->pMit, &p->vTemp3, 0 ); // assuming &p->vTemp3 contains MFFC
Sfm_DecInsert( pNtk, pObj, Limit, &p->vObjGates, &p->vObjFanins, &p->vObjMap, &p->vGateHands, p->GateBuffer, p->GateInvert, &p->vGateFuncs, &p->vTemp, p->pMit );
// increase load due to added new nodes
if ( p->pMit ) Sfm_MitUpdateLoad( p->pMit, &p->vTemp, 1 ); // assuming &p->vTemp contains new nodes
clk = Abc_Clock();
......@@ -2039,13 +2069,13 @@ clk = Abc_Clock();
Sfm_TimUpdateTiming( p->pTim, &p->vTemp );
p->timeTime += Abc_Clock() - clk;
pObjNew = Abc_NtkObj( pNtk, Abc_NtkObjNumMax(pNtk)-1 );
assert( p->DelayMin == 0 || p->DelayMin == Sfm_ManReadObjDelay(p, Abc_ObjId(pObjNew)) );
assert( p->pMit || p->DelayMin == 0 || p->DelayMin == Sfm_ManReadObjDelay(p, Abc_ObjId(pObjNew)) );
// report
if ( pPars->fDelayVerbose )
printf( "Node %5d : I =%3d. Cand = %5d (%6.2f %%) Old =%8.2f. New =%8.2f. Final =%8.2f\n",
OldId, i, Vec_IntSize(&p->vCands), 100.0 * Vec_IntSize(&p->vCands) / Abc_NtkNodeNum(p->pNtk),
printf( "Node %5d %5d : I =%3d. Cand = %5d (%6.2f %%) Old =%8.2f. New =%8.2f. Final =%8.2f\n",
OldId, Abc_NtkObjNumMax(p->pNtk), i, Vec_IntSize(&p->vCands), 100.0 * Vec_IntSize(&p->vCands) / Abc_NtkNodeNum(p->pNtk),
MIO_NUMINV*DelayOld, MIO_NUMINV*Sfm_ManReadObjDelay(p, Abc_ObjId(pObjNew)),
MIO_NUMINV*Sfm_TimReadNtkDelay(p->pTim) );
MIO_NUMINV*Sfm_ManReadNtkDelay(p) );
break;
}
if ( pPars->iNodeOne )
......
src/opt/sfm/sfmInt.h
......@@ -231,6 +231,8 @@ extern Sfm_Mit_t * Sfm_MitStart( Mio_Library_t * pLib, SC_Lib * pScl, Scl_Con_t
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 );
extern void Sfm_MitTransferLoad( Sfm_Mit_t * p, Abc_Obj_t * pNew, Abc_Obj_t * pOld );
extern void Sfm_MitTimingGrow( Sfm_Mit_t * p );
extern void Sfm_MitUpdateLoad( Sfm_Mit_t * p, Vec_Int_t * vTimeNodes, int fAdd );
extern void Sfm_MitUpdateTiming( Sfm_Mit_t * p, Vec_Int_t * vTimeNodes );
extern int Sfm_MitSortArrayByArrival( Sfm_Mit_t * p, Vec_Int_t * vNodes, int iPivot );
......
src/opt/sfm/sfmMit.c
......@@ -53,6 +53,8 @@ Sfm_Mit_t * Sfm_MitStart( Mio_Library_t * pLib, SC_Lib * pScl, Scl_Con_t * pExt
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_MitTransferLoad( Sfm_Mit_t * p, Abc_Obj_t * pNew, Abc_Obj_t * pOld ) {};
void Sfm_MitTimingGrow( Sfm_Mit_t * p ) {};
void Sfm_MitUpdateLoad( Sfm_Mit_t * p, Vec_Int_t * vTimeNodes, int fAdd ) {}
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;}
......
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