/**CFile****************************************************************
FileName [sclSize.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Standard-cell library representation.]
Synopsis [Core timing analysis used in gate-sizing.]
Author [Alan Mishchenko, Niklas Een]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - August 24, 2012.]
Revision [$Id: sclSize.c,v 1.0 2012/08/24 00:00:00 alanmi Exp $]
***********************************************************************/
#include "sclSize.h"
#include "map/mio/mio.h"
#include "misc/vec/vecWec.h"
#include "base/main/main.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Finding most critical objects.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Obj_t * Abc_SclFindCriticalCo( SC_Man * p, int * pfRise )
{
Abc_Obj_t * pObj, * pPivot = NULL;
float fMaxArr = 0;
int i;
assert( Abc_NtkPoNum(p->pNtk) > 0 );
Abc_NtkForEachCo( p->pNtk, pObj, i )
{
SC_Pair * pArr = Abc_SclObjTime( p, pObj );
if ( fMaxArr < pArr->rise ) fMaxArr = pArr->rise, *pfRise = 1, pPivot = pObj;
if ( fMaxArr < pArr->fall ) fMaxArr = pArr->fall, *pfRise = 0, pPivot = pObj;
}
if ( fMaxArr == 0 )
pPivot = Abc_NtkPo(p->pNtk, 0);
assert( pPivot != NULL );
return pPivot;
}
// assumes that slacks are not available (uses arrival times)
Abc_Obj_t * Abc_SclFindMostCriticalFanin2( SC_Man * p, int * pfRise, Abc_Obj_t * pNode )
{
Abc_Obj_t * pFanin, * pPivot = NULL;
float fMaxArr = 0;
int i;
Abc_ObjForEachFanin( pNode, pFanin, i )
{
SC_Pair * pArr = Abc_SclObjTime( p, pFanin );
if ( fMaxArr < pArr->rise ) fMaxArr = pArr->rise, *pfRise = 1, pPivot = pFanin;
if ( fMaxArr < pArr->fall ) fMaxArr = pArr->fall, *pfRise = 0, pPivot = pFanin;
}
return pPivot;
}
// assumes that slack are available
Abc_Obj_t * Abc_SclFindMostCriticalFanin( SC_Man * p, int * pfRise, Abc_Obj_t * pNode )
{
Abc_Obj_t * pFanin, * pPivot = NULL;
float fMinSlack = ABC_INFINITY;
SC_Pair * pArr;
int i;
*pfRise = 0;
// find min-slack node
Abc_ObjForEachFanin( pNode, pFanin, i )
if ( fMinSlack > Abc_SclObjGetSlack( p, pFanin, p->MaxDelay0 ) )
{
fMinSlack = Abc_SclObjGetSlack( p, pFanin, p->MaxDelay0 );
pPivot = pFanin;
}
if ( pPivot == NULL )
return NULL;
// find its leading phase
pArr = Abc_SclObjTime( p, pPivot );
*pfRise = (pArr->rise >= pArr->fall);
return pPivot;
}
/**Function*************************************************************
Synopsis [Printing timing information for the node/network.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Abc_SclTimeNodePrint( SC_Man * p, Abc_Obj_t * pObj, int fRise, int Length, float maxDelay )
{
SC_Cell * pCell = Abc_ObjIsNode(pObj) ? Abc_SclObjCell(pObj) : NULL;
printf( "%8d : ", Abc_ObjId(pObj) );
printf( "%d ", Abc_ObjFaninNum(pObj) );
printf( "%4d ", Abc_ObjFanoutNum(pObj) );
printf( "%-*s ", Length, pCell ? pCell->pName : "pi" );
printf( "A =%7.2f ", pCell ? pCell->area : 0.0 );
printf( "D%s =", fRise ? "r" : "f" );
printf( "%6.1f", Abc_SclObjTimeMax(p, pObj) );
printf( "%7.1f ps ", -Abc_AbsFloat(Abc_SclObjTimeOne(p, pObj, 0) - Abc_SclObjTimeOne(p, pObj, 1)) );
printf( "S =%6.1f ps ", Abc_SclObjSlewMax(p, pObj) );
printf( "Cin =%5.1f ff ", pCell ? SC_CellPinCapAve(pCell) : 0.0 );
printf( "Cout =%6.1f ff ", Abc_SclObjLoadMax(p, pObj) );
printf( "Cmax =%6.1f ff ", pCell ? SC_CellPin(pCell, pCell->n_inputs)->max_out_cap : 0.0 );
printf( "G =%5d ", pCell ? (int)(100.0 * Abc_SclObjLoadAve(p, pObj) / SC_CellPinCapAve(pCell)) : 0 );
// printf( "SL =%6.1f ps", Abc_SclObjSlackMax(p, pObj, p->MaxDelay0) );
printf( "\n" );
}
void Abc_SclTimeNtkPrint( SC_Man * p, int fShowAll, int fPrintPath )
{
int fReversePath = 1;
int i, nLength = 0, fRise = 0;
Abc_Obj_t * pObj, * pPivot = Abc_SclFindCriticalCo( p, &fRise );
float maxDelay = Abc_SclObjTimeOne( p, pPivot, fRise );
p->ReportDelay = maxDelay;
printf( "WireLoad = \"%s\" ", p->pWLoadUsed ? p->pWLoadUsed->pName : "none" );
printf( "Gates =%7d ", Abc_NtkNodeNum(p->pNtk) );
printf( "(%5.1f %%) ", 100.0 * Abc_SclGetBufInvCount(p->pNtk) / Abc_NtkNodeNum(p->pNtk) );
printf( "Cap =%5.1f ff ", p->EstLoadAve );
printf( "(%5.1f %%) ", Abc_SclGetAverageSize(p->pNtk) );
printf( "Area =%12.2f ", Abc_SclGetTotalArea(p->pNtk) );
printf( "(%5.1f %%) ", 100.0 * Abc_SclCountMinSize(p->pLib, p->pNtk, 0) / Abc_NtkNodeNum(p->pNtk) );
printf( "Delay =%9.2f ps ", maxDelay );
printf( "(%5.1f %%) ", 100.0 * Abc_SclCountNearCriticalNodes(p) / Abc_NtkNodeNum(p->pNtk) );
printf( " \n" );
if ( fShowAll )
{
// printf( "Timing information for all nodes: \n" );
// find the longest cell name
Abc_NtkForEachNodeReverse( p->pNtk, pObj, i )
if ( Abc_ObjFaninNum(pObj) > 0 )
nLength = Abc_MaxInt( nLength, strlen(Abc_SclObjCell(pObj)->pName) );
// print timing
Abc_NtkForEachNodeReverse( p->pNtk, pObj, i )
if ( Abc_ObjFaninNum(pObj) > 0 )
Abc_SclTimeNodePrint( p, pObj, -1, nLength, maxDelay );
}
if ( fPrintPath )
{
Abc_Obj_t * pTemp, * pPrev = NULL;
int iStart = -1, iEnd = -1;
Vec_Ptr_t * vPath;
// printf( "Critical path: \n" );
// find the longest cell name
pObj = Abc_ObjFanin0(pPivot);
i = 0;
while ( pObj && Abc_ObjIsNode(pObj) )
{
i++;
nLength = Abc_MaxInt( nLength, strlen(Abc_SclObjCell(pObj)->pName) );
pObj = Abc_SclFindMostCriticalFanin( p, &fRise, pObj );
}
// print timing
if ( !fReversePath )
{
// print timing
pObj = Abc_ObjFanin0(pPivot);
while ( pObj )//&& Abc_ObjIsNode(pObj) )
{
printf( "Path%3d --", i-- );
Abc_SclTimeNodePrint( p, pObj, fRise, nLength, maxDelay );
pPrev = pObj;
pObj = Abc_SclFindMostCriticalFanin( p, &fRise, pObj );
}
}
else
{
// collect path nodes
vPath = Vec_PtrAlloc( 100 );
Vec_PtrPush( vPath, pPivot );
pObj = Abc_ObjFanin0(pPivot);
while ( pObj )//&& Abc_ObjIsNode(pObj) )
{
Vec_PtrPush( vPath, pObj );
pPrev = pObj;
pObj = Abc_SclFindMostCriticalFanin( p, &fRise, pObj );
}
Vec_PtrForEachEntryReverse( Abc_Obj_t *, vPath, pObj, i )
{
printf( "Path%3d --", Vec_PtrSize(vPath)-1-i );
Abc_SclTimeNodePrint( p, pObj, fRise, nLength, maxDelay );
if ( i == 1 )
break;
}
Vec_PtrFree( vPath );
}
// print start-point and end-point
Abc_NtkForEachPi( p->pNtk, pTemp, iStart )
if ( pTemp == pPrev )
break;
Abc_NtkForEachPo( p->pNtk, pTemp, iEnd )
if ( pTemp == pPivot )
break;
printf( "Start-point = pi%0*d. End-point = po%0*d.\n",
Abc_Base10Log( Abc_NtkPiNum(p->pNtk) ), iStart,
Abc_Base10Log( Abc_NtkPoNum(p->pNtk) ), iEnd );
}
}
/**Function*************************************************************
Synopsis [Timing computation for pin/gate/cone/network.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Abc_SclTimeFanin( SC_Man * p, SC_Timing * pTime, Abc_Obj_t * pObj, Abc_Obj_t * pFanin )
{
SC_Pair * pArrIn = Abc_SclObjTime( p, pFanin );
SC_Pair * pSlewIn = Abc_SclObjSlew( p, pFanin );
SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
SC_Pair * pArrOut = Abc_SclObjTime( p, pObj ); // modified
SC_Pair * pSlewOut = Abc_SclObjSlew( p, pObj ); // modified
Scl_LibPinArrival( pTime, pArrIn, pSlewIn, pLoad, pArrOut, pSlewOut );
}
static inline void Abc_SclDeptFanin( SC_Man * p, SC_Timing * pTime, Abc_Obj_t * pObj, Abc_Obj_t * pFanin )
{
SC_Pair * pDepIn = Abc_SclObjDept( p, pFanin ); // modified
SC_Pair * pSlewIn = Abc_SclObjSlew( p, pFanin );
SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
SC_Pair * pDepOut = Abc_SclObjDept( p, pObj );
Scl_LibPinDeparture( pTime, pDepIn, pSlewIn, pLoad, pDepOut );
}
static inline void Abc_SclDeptObj( SC_Man * p, Abc_Obj_t * pObj )
{
SC_Timing * pTime;
Abc_Obj_t * pFanout;
int i;
SC_PairClean( Abc_SclObjDept(p, pObj) );
Abc_ObjForEachFanout( pObj, pFanout, i )
{
if ( Abc_ObjIsCo(pFanout) || Abc_ObjIsLatch(pFanout) )
continue;
pTime = Scl_CellPinTime( Abc_SclObjCell(pFanout), Abc_NodeFindFanin(pFanout, pObj) );
Abc_SclDeptFanin( p, pTime, pFanout, pObj );
}
}
static inline float Abc_SclObjLoadValue( SC_Man * p, Abc_Obj_t * pObj )
{
// float Value = Abc_MaxFloat(pLoad->fall, pLoad->rise) / (p->EstLoadAve * p->EstLoadMax);
return (0.5 * Abc_SclObjLoad(p, pObj)->fall + 0.5 * Abc_SclObjLoad(p, pObj)->rise) / (p->EstLoadAve * p->EstLoadMax);
}
static inline void Abc_SclTimeCi( SC_Man * p, Abc_Obj_t * pObj )
{
if ( p->pPiDrive != NULL )
{
SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
SC_Pair * pTime = Abc_SclObjTime( p, pObj );
SC_Pair * pSlew = Abc_SclObjSlew( p, pObj );
Scl_LibHandleInputDriver( p->pPiDrive, pLoad, pTime, pSlew );
}
}
void Abc_SclTimeNode( SC_Man * p, Abc_Obj_t * pObj, int fDept )
{
SC_Timing * pTime;
SC_Cell * pCell;
int k;
SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
float LoadRise = pLoad->rise;
float LoadFall = pLoad->fall;
float DeptRise = 0;
float DeptFall = 0;
float Value = p->EstLoadMax ? Abc_SclObjLoadValue( p, pObj ) : 0;
Abc_Obj_t * pFanin;
if ( Abc_ObjIsCi(pObj) )
{
assert( !fDept );
Abc_SclTimeCi( p, pObj );
return;
}
if ( Abc_ObjIsCo(pObj) )
{
if ( !fDept )
{
Abc_SclObjDupFanin( p, pObj );
Vec_FltWriteEntry( p->vTimesOut, pObj->iData, Abc_SclObjTimeMax(p, pObj) );
Vec_QueUpdate( p->vQue, pObj->iData );
}
return;
}
assert( Abc_ObjIsNode(pObj) );
// if ( !(Abc_ObjFaninNum(pObj) == 1 && Abc_ObjIsPi(Abc_ObjFanin0(pObj))) && p->EstLoadMax && Value > 1 )
if ( p->EstLoadMax && Value > 1 )
{
pLoad->rise = p->EstLoadAve * p->EstLoadMax;
pLoad->fall = p->EstLoadAve * p->EstLoadMax;
if ( fDept )
{
SC_Pair * pDepOut = Abc_SclObjDept( p, pObj );
float EstDelta = p->EstLinear * log( Value );
DeptRise = pDepOut->rise;
DeptFall = pDepOut->fall;
pDepOut->rise += EstDelta;
pDepOut->fall += EstDelta;
}
p->nEstNodes++;
}
// get the library cell
pCell = Abc_SclObjCell( pObj );
// compute for each fanin
Abc_ObjForEachFanin( pObj, pFanin, k )
{
pTime = Scl_CellPinTime( pCell, k );
if ( fDept )
Abc_SclDeptFanin( p, pTime, pObj, pFanin );
else
Abc_SclTimeFanin( p, pTime, pObj, pFanin );
}
if ( p->EstLoadMax && Value > 1 )
{
pLoad->rise = LoadRise;
pLoad->fall = LoadFall;
if ( fDept )
{
SC_Pair * pDepOut = Abc_SclObjDept( p, pObj );
pDepOut->rise = DeptRise;
pDepOut->fall = DeptFall;
}
else
{
SC_Pair * pArrOut = Abc_SclObjTime( p, pObj );
float EstDelta = p->EstLinear * log( Value );
pArrOut->rise += EstDelta;
pArrOut->fall += EstDelta;
}
}
}
void Abc_SclTimeCone( SC_Man * p, Vec_Int_t * vCone )
{
int fVerbose = 0;
Abc_Obj_t * pObj;
int i;
Abc_SclConeClean( p, vCone );
Abc_NtkForEachObjVec( vCone, p->pNtk, pObj, i )
{
if ( fVerbose && Abc_ObjIsNode(pObj) )
printf( " Updating node %d with gate %s\n", Abc_ObjId(pObj), Abc_SclObjCell(pObj)->pName );
if ( fVerbose && Abc_ObjIsNode(pObj) )
printf( " before (%6.1f ps %6.1f ps) ", Abc_SclObjTimeOne(p, pObj, 1), Abc_SclObjTimeOne(p, pObj, 0) );
Abc_SclTimeNode( p, pObj, 0 );
if ( fVerbose && Abc_ObjIsNode(pObj) )
printf( "after (%6.1f ps %6.1f ps)\n", Abc_SclObjTimeOne(p, pObj, 1), Abc_SclObjTimeOne(p, pObj, 0) );
}
}
void Abc_SclTimeNtkRecompute( SC_Man * p, float * pArea, float * pDelay, int fReverse, float DUser )
{
Abc_Obj_t * pObj;
float D;
int i;
Abc_SclComputeLoad( p );
Abc_SclManCleanTime( p );
p->nEstNodes = 0;
Abc_NtkForEachCi( p->pNtk, pObj, i )
Abc_SclTimeNode( p, pObj, 0 );
Abc_NtkForEachNode1( p->pNtk, pObj, i )
Abc_SclTimeNode( p, pObj, 0 );
Abc_NtkForEachCo( p->pNtk, pObj, i )
Abc_SclTimeNode( p, pObj, 0 );
D = Abc_SclReadMaxDelay( p );
if ( fReverse && DUser > 0 && D < DUser )
D = DUser;
if ( pArea )
*pArea = Abc_SclGetTotalArea(p->pNtk);
if ( pDelay )
*pDelay = D;
if ( fReverse )
{
p->nEstNodes = 0;
Abc_NtkForEachNodeReverse1( p->pNtk, pObj, i )
Abc_SclTimeNode( p, pObj, 1 );
}
}
/**Function*************************************************************
Synopsis [Incremental timing update.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Abc_SclTimeIncUpdateClean( SC_Man * 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 );
}
}
static inline void Abc_SclTimeIncAddNode( SC_Man * p, Abc_Obj_t * pObj )
{
assert( !Abc_ObjIsLatch(pObj) );
assert( pObj->fMarkC == 0 );
pObj->fMarkC = 1;
Vec_IntPush( Vec_WecEntry(p->vLevels, Abc_ObjLevel(pObj)), Abc_ObjId(pObj) );
p->nIncUpdates++;
}
static inline void Abc_SclTimeIncAddFanins( SC_Man * p, Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanin;
int i;
Abc_ObjForEachFanin( pObj, pFanin, i )
// if ( !pFanin->fMarkC && Abc_ObjIsNode(pFanin) )
if ( !pFanin->fMarkC && !Abc_ObjIsLatch(pFanin) )
Abc_SclTimeIncAddNode( p, pFanin );
}
static inline void Abc_SclTimeIncAddFanouts( SC_Man * p, Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanout;
int i;
Abc_ObjForEachFanout( pObj, pFanout, i )
if ( !pFanout->fMarkC && !Abc_ObjIsLatch(pFanout) )
Abc_SclTimeIncAddNode( p, pFanout );
}
static inline void Abc_SclTimeIncUpdateArrival( SC_Man * p )
{
Vec_Int_t * vLevel;
SC_Pair ArrOut, SlewOut;
SC_Pair * pArrOut, *pSlewOut;
Abc_Obj_t * pObj;
float E = (float)0.1;
int i, k;
Vec_WecForEachLevel( p->vLevels, vLevel, i )
{
Abc_NtkForEachObjVec( vLevel, p->pNtk, pObj, k )
{
if ( Abc_ObjIsCo(pObj) )
{
Abc_SclObjDupFanin( p, pObj );
Vec_FltWriteEntry( p->vTimesOut, pObj->iData, Abc_SclObjTimeMax(p, pObj) );
Vec_QueUpdate( p->vQue, pObj->iData );
continue;
}
pArrOut = Abc_SclObjTime( p, pObj );
pSlewOut = Abc_SclObjSlew( p, pObj );
SC_PairMove( &ArrOut, pArrOut );
SC_PairMove( &SlewOut, pSlewOut );
Abc_SclTimeNode( p, pObj, 0 );
// if ( !SC_PairEqual(&ArrOut, pArrOut) || !SC_PairEqual(&SlewOut, pSlewOut) )
if ( !SC_PairEqualE(&ArrOut, pArrOut, E) || !SC_PairEqualE(&SlewOut, pSlewOut, E) )
Abc_SclTimeIncAddFanouts( p, pObj );
}
}
p->MaxDelay = Abc_SclReadMaxDelay( p );
}
static inline void Abc_SclTimeIncUpdateDeparture( SC_Man * p )
{
Vec_Int_t * vLevel;
SC_Pair DepOut, * pDepOut;
Abc_Obj_t * pObj;
float E = (float)0.1;
int i, k;
Vec_WecForEachLevelReverse( p->vLevels, vLevel, i )
{
Abc_NtkForEachObjVec( vLevel, p->pNtk, pObj, k )
{
pDepOut = Abc_SclObjDept( p, pObj );
SC_PairMove( &DepOut, pDepOut );
Abc_SclDeptObj( p, pObj );
// if ( !SC_PairEqual(&DepOut, pDepOut) )
if ( !SC_PairEqualE(&DepOut, pDepOut, E) )
Abc_SclTimeIncAddFanins( p, pObj );
}
}
p->MaxDelay = Abc_SclReadMaxDelay( p );
}
void Abc_SclTimeIncCheckLevel( Abc_Ntk_t * pNtk )
{
Abc_Obj_t * pObj;
int i;
Abc_NtkForEachObj( pNtk, pObj, i )
if ( (int)pObj->Level != Abc_ObjLevelNew(pObj) )
printf( "Level of node %d is out of date!\n", i );
}
int Abc_SclTimeIncUpdate( SC_Man * p )
{
Abc_Obj_t * pObj;
int i, RetValue;
if ( Vec_IntSize(p->vChanged) == 0 )
return 0;
// Abc_SclTimeIncCheckLevel( p->pNtk );
Abc_NtkForEachObjVec( p->vChanged, p->pNtk, pObj, i )
{
Abc_SclTimeIncAddFanins( p, pObj );
if ( pObj->fMarkC )
continue;
Abc_SclTimeIncAddNode( p, pObj );
}
Vec_IntClear( p->vChanged );
Abc_SclTimeIncUpdateArrival( p );
Abc_SclTimeIncUpdateDeparture( p );
Abc_SclTimeIncUpdateClean( p );
RetValue = p->nIncUpdates;
p->nIncUpdates = 0;
return RetValue;
}
void Abc_SclTimeIncInsert( SC_Man * p, Abc_Obj_t * pObj )
{
Vec_IntPush( p->vChanged, Abc_ObjId(pObj) );
}
void Abc_SclTimeIncUpdateLevel_rec( Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanout;
int i, LevelNew = Abc_ObjLevelNew(pObj);
if ( LevelNew == (int)pObj->Level )
return;
pObj->Level = LevelNew;
Abc_ObjForEachFanout( pObj, pFanout, i )
Abc_SclTimeIncUpdateLevel_rec( pFanout );
}
void Abc_SclTimeIncUpdateLevel( Abc_Obj_t * pObj )
{
Abc_SclTimeIncUpdateLevel_rec( pObj );
}
/**Function*************************************************************
Synopsis [Read input slew and output load.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_SclManReadSlewAndLoad( SC_Man * p, Abc_Ntk_t * pNtk )
{
if ( Abc_FrameReadMaxLoad() )
{
Abc_Obj_t * pObj; int i;
float MaxLoad = Abc_FrameReadMaxLoad();
// printf( "Default output load is specified (%.2f ff).\n", MaxLoad );
Abc_NtkForEachPo( pNtk, pObj, i )
{
SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
pLoad->rise = pLoad->fall = MaxLoad;
}
}
if ( Abc_FrameReadDrivingCell() )
{
int iCell = Abc_SclCellFind( p->pLib, Abc_FrameReadDrivingCell() );
if ( iCell == -1 )
printf( "Cannot find the default PI driving cell (%s) in the library.\n", Abc_FrameReadDrivingCell() );
else
{
// printf( "Default PI driving cell is specified (%s).\n", Abc_FrameReadDrivingCell() );
p->pPiDrive = SC_LibCell( p->pLib, iCell );
assert( p->pPiDrive != NULL );
assert( p->pPiDrive->n_inputs == 1 );
}
}
}
/**Function*************************************************************
Synopsis [Prepare timing manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
SC_Man * Abc_SclManStart( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fUseWireLoads, int fDept, float DUser, int nTreeCRatio )
{
SC_Man * p = Abc_SclManAlloc( pLib, pNtk );
if ( nTreeCRatio )
{
p->EstLoadMax = 0.01 * nTreeCRatio; // max ratio of Cout/Cave when the estimation is used
p->EstLinear = 100; // linear coefficient
}
Abc_SclMioGates2SclGates( pLib, pNtk );
Abc_SclManReadSlewAndLoad( p, pNtk );
if ( fUseWireLoads )
{
if ( pNtk->pWLoadUsed == NULL )
{
p->pWLoadUsed = Abc_SclFindWireLoadModel( pLib, Abc_SclGetTotalArea(p->pNtk) );
if ( p->pWLoadUsed )
pNtk->pWLoadUsed = Abc_UtilStrsav( p->pWLoadUsed->pName );
}
else
p->pWLoadUsed = Abc_SclFetchWireLoadModel( pLib, pNtk->pWLoadUsed );
}
Abc_SclTimeNtkRecompute( p, &p->SumArea0, &p->MaxDelay0, fDept, DUser );
p->SumArea = p->SumArea0;
p->MaxDelay = p->MaxDelay0;
return p;
}
/**Function*************************************************************
Synopsis [Printing out timing information for the network.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_SclTimePerform( SC_Lib * pLib, Abc_Ntk_t * pNtk, int nTreeCRatio, int fUseWireLoads, int fShowAll, int fPrintPath, int fDumpStats )
{
SC_Man * p;
p = Abc_SclManStart( pLib, pNtk, fUseWireLoads, 1, 0, nTreeCRatio );
Abc_SclTimeNtkPrint( p, fShowAll, fPrintPath );
if ( fDumpStats )
Abc_SclDumpStats( p, "stats.txt", 0 );
Abc_SclManFree( p );
}
/**Function*************************************************************
Synopsis [Printing out fanin information.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_SclCheckCommonInputs( Abc_Obj_t * pObj, Abc_Obj_t * pFanin )
{
Abc_Obj_t * pTemp;
int i;
Abc_ObjForEachFanin( pObj, pTemp, i )
if ( Abc_NodeFindFanin( pFanin, pTemp ) >= 0 )
{
printf( "Node %d and its fanin %d have common fanin %d.\n", Abc_ObjId(pObj), Abc_ObjId(pFanin), Abc_ObjId(pTemp) );
printf( "%-16s : ", Mio_GateReadName((Mio_Gate_t *)pObj->pData) );
Abc_ObjPrint( stdout, pObj );
printf( "%-16s : ", Mio_GateReadName((Mio_Gate_t *)pFanin->pData) );
Abc_ObjPrint( stdout, pFanin );
if ( pTemp->pData )
printf( "%-16s : ", Mio_GateReadName((Mio_Gate_t *)pTemp->pData) );
Abc_ObjPrint( stdout, pTemp );
return 1;
}
return 0;
}
void Abc_SclPrintFaninPairs( SC_Man * p, Abc_Ntk_t * pNtk )
{
Abc_Obj_t * pObj, * pFanin;
int i, k;
Abc_NtkForEachNode( pNtk, pObj, i )
Abc_ObjForEachFanin( pObj, pFanin, k )
if ( Abc_ObjIsNode(pFanin) && Abc_ObjFanoutNum(pFanin) == 1 )
Abc_SclCheckCommonInputs( pObj, pFanin );
}
/**Function*************************************************************
Synopsis [Printing out buffer information.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Abc_ObjIsBuffer( Abc_Obj_t * pObj ) { return Abc_ObjIsNode(pObj) && Abc_ObjFaninNum(pObj) == 1; }
int Abc_SclHasBufferFanout( Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanout;
int i;
Abc_ObjForEachFanout( pObj, pFanout, i )
if ( Abc_ObjIsBuffer(pFanout) )
return 1;
return 0;
}
int Abc_SclCountBufferFanoutsInt( Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanout;
int i, Counter = 0;
Abc_ObjForEachFanout( pObj, pFanout, i )
if ( Abc_ObjIsBuffer(pFanout) )
Counter += Abc_SclCountBufferFanoutsInt( pFanout );
return Counter + Abc_ObjIsBuffer(pObj);
}
int Abc_SclCountBufferFanouts( Abc_Obj_t * pObj )
{
return Abc_SclCountBufferFanoutsInt(pObj) - Abc_ObjIsBuffer(pObj);
}
int Abc_SclCountNonBufferFanoutsInt( Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanout;
int i, Counter = 0;
if ( !Abc_ObjIsBuffer(pObj) )
return 1;
Abc_ObjForEachFanout( pObj, pFanout, i )
Counter += Abc_SclCountNonBufferFanoutsInt( pFanout );
return Counter;
}
int Abc_SclCountNonBufferFanouts( Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanout;
int i, Counter = 0;
Abc_ObjForEachFanout( pObj, pFanout, i )
Counter += Abc_SclCountNonBufferFanoutsInt( pFanout );
return Counter;
}
float Abc_SclCountNonBufferDelayInt( SC_Man * p, Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanout;
float Delay = 0;
int i;
if ( !Abc_ObjIsBuffer(pObj) )
return Abc_SclObjTimeMax(p, pObj);
Abc_ObjForEachFanout( pObj, pFanout, i )
Delay += Abc_SclCountNonBufferDelayInt( p, pFanout );
return Delay;
}
float Abc_SclCountNonBufferDelay( SC_Man * p, Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanout;
float Delay = 0;
int i;
Abc_ObjForEachFanout( pObj, pFanout, i )
Delay += Abc_SclCountNonBufferDelayInt( p, pFanout );
return Delay;
}
float Abc_SclCountNonBufferLoadInt( SC_Man * p, Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanout;
float Load = 0;
int i;
if ( !Abc_ObjIsBuffer(pObj) )
return 0;
Abc_ObjForEachFanout( pObj, pFanout, i )
Load += Abc_SclCountNonBufferLoadInt( p, pFanout );
Load += 0.5 * Abc_SclObjLoad(p, pObj)->rise + 0.5 * Abc_SclObjLoad(p, pObj)->fall;
Load -= 0.5 * SC_CellPin(Abc_SclObjCell(pObj), 0)->rise_cap + 0.5 * SC_CellPin(Abc_SclObjCell(pObj), 0)->fall_cap;
return Load;
}
float Abc_SclCountNonBufferLoad( SC_Man * p, Abc_Obj_t * pObj )
{
Abc_Obj_t * pFanout;
float Load = 0;
int i;
Abc_ObjForEachFanout( pObj, pFanout, i )
Load += Abc_SclCountNonBufferLoadInt( p, pFanout );
Load += 0.5 * Abc_SclObjLoad(p, pObj)->rise + 0.5 * Abc_SclObjLoad(p, pObj)->fall;
return Load;
}
void Abc_SclPrintBuffersOne( SC_Man * p, Abc_Obj_t * pObj, int nOffset )
{
int i;
for ( i = 0; i < nOffset; i++ )
printf( " " );
printf( "%6d: %-16s (%2d:%3d:%3d) ",
Abc_ObjId(pObj),
Abc_ObjIsPi(pObj) ? "pi" : Mio_GateReadName((Mio_Gate_t *)pObj->pData),
Abc_ObjFanoutNum(pObj),
Abc_SclCountBufferFanouts(pObj),
Abc_SclCountNonBufferFanouts(pObj) );
for ( ; i < 4; i++ )
printf( " " );
printf( "a =%5.2f ", Abc_ObjIsPi(pObj) ? 0 : Abc_SclObjCell(pObj)->area );
printf( "d = (" );
printf( "%6.0f ps; ", Abc_SclObjTimeOne(p, pObj, 1) );
printf( "%6.0f ps) ", Abc_SclObjTimeOne(p, pObj, 0) );
printf( "l =%5.0f ff ", Abc_SclObjLoadMax(p, pObj) );
printf( "s =%5.0f ps ", Abc_SclObjSlewMax(p, pObj) );
printf( "sl =%5.0f ps ", Abc_SclObjSlackMax(p, pObj, p->MaxDelay0) );
if ( nOffset == 0 )
{
printf( "L =%5.0f ff ", Abc_SclCountNonBufferLoad(p, pObj) );
printf( "Lx =%5.0f ff ", 100.0*Abc_SclCountNonBufferLoad(p, pObj)/p->EstLoadAve );
printf( "Dx =%5.0f ps ", Abc_SclCountNonBufferDelay(p, pObj)/Abc_SclCountNonBufferFanouts(pObj) - Abc_SclObjTimeOne(p, pObj, 1) );
printf( "Cx =%5.0f ps", (Abc_SclCountNonBufferDelay(p, pObj)/Abc_SclCountNonBufferFanouts(pObj) - Abc_SclObjTimeOne(p, pObj, 1))/log(Abc_SclCountNonBufferLoad(p, pObj)/p->EstLoadAve) );
}
printf( "\n" );
}
void Abc_SclPrintBuffersInt( SC_Man * p, Abc_Obj_t * pObj, int nOffset )
{
Abc_Obj_t * pFanout;
int i;
Abc_SclPrintBuffersOne( p, pObj, nOffset );
assert( Abc_ObjIsBuffer(pObj) );
Abc_ObjForEachFanout( pObj, pFanout, i )
if ( Abc_ObjIsBuffer(pFanout) )
Abc_SclPrintBuffersInt( p, pFanout, nOffset + 1 );
}
void Abc_SclPrintBufferTrees( SC_Man * p, Abc_Ntk_t * pNtk )
{
Abc_Obj_t * pObj, * pFanout;
int i, k;
Abc_NtkForEachObj( pNtk, pObj, i )
{
if ( !Abc_ObjIsBuffer(pObj) && Abc_SclCountBufferFanouts(pObj) > 3 )
{
Abc_SclPrintBuffersOne( p, pObj, 0 );
Abc_ObjForEachFanout( pObj, pFanout, k )
if ( Abc_ObjIsBuffer(pFanout) )
Abc_SclPrintBuffersInt( p, pFanout, 1 );
printf( "\n" );
}
}
}
void Abc_SclPrintBuffers( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fVerbose )
{
int fUseWireLoads = 0;
SC_Man * p;
assert( Abc_NtkIsMappedLogic(pNtk) );
p = Abc_SclManStart( pLib, pNtk, fUseWireLoads, 1, 0, 10000 );
Abc_SclPrintBufferTrees( p, pNtk );
// Abc_SclPrintFaninPairs( p, pNtk );
Abc_SclManFree( p );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END