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-rw-r--r--src/map/scl/sclDnsize.c2
-rw-r--r--src/map/scl/sclLoad.c36
-rw-r--r--src/map/scl/sclSize.c46
-rw-r--r--src/map/scl/sclSize.h5
-rw-r--r--src/map/scl/sclUpsize.c2
5 files changed, 81 insertions, 10 deletions
diff --git a/src/map/scl/sclDnsize.c b/src/map/scl/sclDnsize.c
index 13ab2822..b407f90a 100644
--- a/src/map/scl/sclDnsize.c
+++ b/src/map/scl/sclDnsize.c
@@ -120,6 +120,8 @@ clk = Abc_Clock();
continue;
if ( i > Notches )
break;
+ if ( p->pInDrive && !Abc_SclInputDriveOk( p, pObj, pCellNew ) )
+ continue;
// set new cell
Abc_SclObjSetCell( p, pObj, pCellNew );
Abc_SclUpdateLoad( p, pObj, pCellOld, pCellNew );
diff --git a/src/map/scl/sclLoad.c b/src/map/scl/sclLoad.c
index a9f5e527..de8ee130 100644
--- a/src/map/scl/sclLoad.c
+++ b/src/map/scl/sclLoad.c
@@ -111,18 +111,36 @@ void Abc_SclComputeLoad( SC_Man * p )
pLoad->rise += pLoadPo->rise;
pLoad->fall += pLoadPo->fall;
}
- if ( p->pWLoadUsed == NULL )
- return;
// add wire load
- vWireCaps = Abc_SclFindWireCaps( p, p->pWLoadUsed );
- Abc_NtkForEachNode1( p->pNtk, pObj, i )
+ if ( p->pWLoadUsed != NULL )
{
- SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
- k = Abc_MinInt( Vec_FltSize(vWireCaps)-1, Abc_ObjFanoutNum(pObj) );
- pLoad->rise += Vec_FltEntry(vWireCaps, k);
- pLoad->fall += Vec_FltEntry(vWireCaps, k);
+ vWireCaps = Abc_SclFindWireCaps( p, p->pWLoadUsed );
+ Abc_NtkForEachNode1( p->pNtk, pObj, i )
+ {
+ SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
+ k = Abc_MinInt( Vec_FltSize(vWireCaps)-1, Abc_ObjFanoutNum(pObj) );
+ pLoad->rise += Vec_FltEntry(vWireCaps, k);
+ pLoad->fall += Vec_FltEntry(vWireCaps, k);
+ }
+ Abc_NtkForEachPi( p->pNtk, pObj, i )
+ {
+ SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
+ k = Abc_MinInt( Vec_FltSize(vWireCaps)-1, Abc_ObjFanoutNum(pObj) );
+ pLoad->rise += Vec_FltEntry(vWireCaps, k);
+ pLoad->fall += Vec_FltEntry(vWireCaps, k);
+ }
+ Vec_FltFree( vWireCaps );
+ }
+ // check input loads
+ if ( p->pInDrive != NULL )
+ {
+ Abc_NtkForEachPi( p->pNtk, pObj, i )
+ {
+ SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
+ if ( p->pInDrive[Abc_ObjId(pObj)] != 0 && (pLoad->rise > p->pInDrive[Abc_ObjId(pObj)] || pLoad->fall > p->pInDrive[Abc_ObjId(pObj)]) )
+ printf( "Maximum input drive strength is exceeded at primary input %d.\n", i );
+ }
}
- Vec_FltFree( vWireCaps );
}
/**Function*************************************************************
diff --git a/src/map/scl/sclSize.c b/src/map/scl/sclSize.c
index 123eb94a..bab095f5 100644
--- a/src/map/scl/sclSize.c
+++ b/src/map/scl/sclSize.c
@@ -298,6 +298,7 @@ void Abc_SclManReadSlewAndLoad( SC_Man * p, Abc_Ntk_t * pNtk )
int i;
if ( pNtk->pManTime == NULL )
return;
+/*
// read input slew
pTime = Abc_NtkReadDefaultInputDrive( pNtk );
if ( Abc_MaxFloat(pTime->Rise, pTime->Fall) != 0 )
@@ -321,6 +322,27 @@ void Abc_SclManReadSlewAndLoad( SC_Man * p, Abc_Ntk_t * pNtk )
pSlew->fall = SC_LibTimeFromPs( p->pLib, pTime->Fall );
}
}
+*/
+ pTime = Abc_NtkReadDefaultInputDrive( pNtk );
+ if ( Abc_MaxFloat(pTime->Rise, pTime->Fall) != 0 )
+ {
+ printf( "Default input drive strength is specified (%.2f ff; %.2f ff).\n", pTime->Rise, pTime->Fall );
+ if ( p->pInDrive == NULL )
+ p->pInDrive = ABC_CALLOC( float, Abc_NtkObjNumMax(pNtk) );
+ Abc_NtkForEachPi( pNtk, pObj, i )
+ p->pInDrive[Abc_ObjId(pObj)] = 0.5 * SC_LibCapFromFf( p->pLib, pTime->Rise ) + 0.5 * SC_LibCapFromFf( p->pLib, pTime->Fall );
+ }
+ if ( Abc_NodeReadInputDrive(pNtk, 0) != NULL )
+ {
+ printf( "Input drive strengths for some primary inputs are specified.\n" );
+ if ( p->pInDrive == NULL )
+ p->pInDrive = ABC_CALLOC( float, Abc_NtkObjNumMax(pNtk) );
+ Abc_NtkForEachPi( pNtk, pObj, i )
+ {
+ pTime = Abc_NodeReadInputDrive(pNtk, i);
+ p->pInDrive[Abc_ObjId(pObj)] = 0.5 * SC_LibCapFromFf( p->pLib, pTime->Rise ) + 0.5 * SC_LibCapFromFf( p->pLib, pTime->Fall );
+ }
+ }
// read output load
pTime = Abc_NtkReadDefaultOutputLoad( pNtk );
if ( Abc_MaxFloat(pTime->Rise, pTime->Fall) != 0 )
@@ -511,6 +533,30 @@ void Abc_SclPrintBuffers( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fVerbose )
}
+/**Function*************************************************************
+
+ Synopsis [Checks if the input drive capability is ok.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Abc_SclInputDriveOk( SC_Man * p, Abc_Obj_t * pObj, SC_Cell * pCell )
+{
+ Abc_Obj_t * pFanin;
+ int i;
+ assert( Abc_ObjFaninNum(pObj) == pCell->n_inputs );
+ Abc_ObjForEachFanin( pObj, pFanin, i )
+ if ( Abc_ObjIsPi(pFanin) && p->pInDrive[Abc_ObjId(pFanin)] > 0 &&
+ (p->pInDrive[Abc_ObjId(pFanin)] / Abc_ObjFanoutNum(pFanin)) <
+ Abc_MaxFloat(SC_CellPin(pCell, i)->rise_cap, SC_CellPin(pCell, i)->fall_cap) )
+ return 0;
+ return 1;
+}
+
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
diff --git a/src/map/scl/sclSize.h b/src/map/scl/sclSize.h
index d9964f28..ed210b29 100644
--- a/src/map/scl/sclSize.h
+++ b/src/map/scl/sclSize.h
@@ -58,7 +58,8 @@ struct SC_Man_
SC_Pair * pSlews; // slews for each gate
SC_Pair * pTimes2; // arrivals for each gate
SC_Pair * pSlews2; // slews for each gate
- float * pSlack; // slacks for each gate
+ float * pSlack; // slacks for each gatt
+ float * pInDrive; // maximum input drive strength
Vec_Flt_t * vTimesOut; // output arrival times
Vec_Que_t * vQue; // outputs by their time
SC_WireLoad * pWLoadUsed; // name of the used WireLoad model
@@ -185,6 +186,7 @@ static inline void Abc_SclManFree( SC_Man * p )
ABC_FREE( p->pTimes2 );
ABC_FREE( p->pSlews2 );
ABC_FREE( p->pSlack );
+ ABC_FREE( p->pInDrive );
ABC_FREE( p );
}
static inline void Abc_SclManCleanTime( SC_Man * p )
@@ -404,6 +406,7 @@ extern void Abc_SclTimeCone( SC_Man * p, Vec_Int_t * vCone );
extern void Abc_SclTimeNtkRecompute( SC_Man * p, float * pArea, float * pDelay, int fReverse, float DUser );
extern void Abc_SclTimePerform( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fUseWireLoads, int fShowAll, int fPrintPath, int fDumpStats );
extern void Abc_SclPrintBuffers( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fVerbose );
+extern int Abc_SclInputDriveOk( SC_Man * p, Abc_Obj_t * pObj, SC_Cell * pCell );
/*=== sclUpsize.c ===============================================================*/
extern void Abc_SclUpsizePerform( SC_Lib * pLib, Abc_Ntk_t * pNtk, SC_SizePars * pPars );
/*=== sclUtil.c ===============================================================*/
diff --git a/src/map/scl/sclUpsize.c b/src/map/scl/sclUpsize.c
index 52fa20f8..84445a00 100644
--- a/src/map/scl/sclUpsize.c
+++ b/src/map/scl/sclUpsize.c
@@ -286,6 +286,8 @@ int Abc_SclFindUpsizes( SC_Man * p, Vec_Int_t * vPathNodes, int Ratio, int Notch
continue;
if ( k > Notches )
break;
+ if ( p->pInDrive && !Abc_SclInputDriveOk( p, pObj, pCellNew ) )
+ continue;
// set new cell
Abc_SclObjSetCell( p, pObj, pCellNew );
Abc_SclUpdateLoad( p, pObj, pCellOld, pCellNew );
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 05:06:42 +0000