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Diffstat (limited to 'src/opt/sfm/sfmTime.c')
-rw-r--r-- | src/opt/sfm/sfmTime.c | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/src/opt/sfm/sfmTime.c b/src/opt/sfm/sfmTime.c new file mode 100644 index 00000000..eb5d042c --- /dev/null +++ b/src/opt/sfm/sfmTime.c @@ -0,0 +1,277 @@ +/**CFile**************************************************************** + + FileName [sfmTime.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [SAT-based optimization using internal don't-cares.] + + Synopsis [Timing manager.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: sfmTime.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "sfmInt.h" +#include "misc/st/st.h" +#include "map/mio/mio.h" +#include "base/abc/abc.h" +#include "misc/util/utilNam.h" +#include "map/scl/sclCon.h" + +ABC_NAMESPACE_IMPL_START + + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Sfm_Tim_t_ Sfm_Tim_t; +struct Sfm_Tim_t_ +{ + // external + Mio_Library_t * pLib; // library + Scl_Con_t * pExt; // external timing + Abc_Ntk_t * pNtk; // mapped network + int Delay; // the largest delay + // 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) + // critical path + Vec_Int_t vPath; // critical path +}; + +static inline int * Sfm_TimArr( Sfm_Tim_t * p, Abc_Obj_t * pNode ) { return Vec_IntEntryP( &p->vTimArrs, Abc_Var2Lit(Abc_ObjId(pNode), 0) ); } +static inline int * Sfm_TimReq( Sfm_Tim_t * p, Abc_Obj_t * pNode ) { return Vec_IntEntryP( &p->vTimReqs, Abc_Var2Lit(Abc_ObjId(pNode), 0) ); } +static inline int * Sfm_TimSlew( Sfm_Tim_t * p, Abc_Obj_t * pNode ) { return Vec_IntEntryP( &p->vTimSlews, Abc_Var2Lit(Abc_ObjId(pNode), 0) ); } +static inline int * Sfm_TimLoad( Sfm_Tim_t * p, Abc_Obj_t * pNode ) { return Vec_IntEntryP( &p->vTimLoads, Abc_Var2Lit(Abc_ObjId(pNode), 0) ); } + +static inline int Sfm_TimArrMax( Sfm_Tim_t * p, Abc_Obj_t * pNode ) { int * a = Sfm_TimArr(p, pNode); return Abc_MaxInt(a[0], a[1]); } +static inline void Sfm_TimSetReq( Sfm_Tim_t * p, Abc_Obj_t * pNode, int t ) { int * r = Sfm_TimReq(p, pNode); r[0] = r[1] = t; } +static inline int Sfm_TimSlack( Sfm_Tim_t * p, Abc_Obj_t * pNode ) { int * r = Sfm_TimReq(p, pNode), * a = Sfm_TimArr(p, pNode); return Abc_MinInt(r[0]-a[0], r[1]-a[1]); } + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Sfm_TimEdgeArrival( Sfm_Tim_t * p, Abc_Obj_t * pNode, int iEdge, Mio_Pin_t * pPin ) +{ + Mio_PinPhase_t PinPhase = Mio_PinReadPhase(pPin); + int tDelayBlockRise = (int)(MIO_NUM*Mio_PinReadDelayBlockRise(pPin)); + int tDelayBlockFall = (int)(MIO_NUM*Mio_PinReadDelayBlockFall(pPin)); + int * pTimeOut = Sfm_TimArr(p, pNode); + int * pTimeIn = Sfm_TimArr(p, Abc_ObjFanin(pNode, iEdge)); + 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 ); + } +} +void Sfm_TimGateArrival( Sfm_Tim_t * p, Abc_Obj_t * pNode ) +{ + Mio_Gate_t * pGate = (Mio_Gate_t *)pNode->pData; + Mio_Pin_t * pPin; int i = 0; + Mio_GateForEachPin( pGate, pPin ) + Sfm_TimEdgeArrival( p, pNode, i++, pPin ); + assert( i == Mio_GateReadPinNum(pGate) ); +} + +void Sfm_TimEdgeRequired( Sfm_Tim_t * p, Abc_Obj_t * pNode, int iEdge, Mio_Pin_t * pPin ) +{ + Mio_PinPhase_t PinPhase = Mio_PinReadPhase(pPin); + int tDelayBlockRise = (int)(MIO_NUM*Mio_PinReadDelayBlockRise(pPin)); + int tDelayBlockFall = (int)(MIO_NUM*Mio_PinReadDelayBlockFall(pPin)); + int * pTimeOut = Sfm_TimReq(p, pNode); + int * pTimeIn = Sfm_TimReq(p, Abc_ObjFanin(pNode, iEdge)); + 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 ); + } +} +void Sfm_TimGateRequired( Sfm_Tim_t * p, Abc_Obj_t * pNode ) +{ + Mio_Gate_t * pGate = (Mio_Gate_t *)pNode->pData; + Mio_Pin_t * pPin; int i = 0; + Mio_GateForEachPin( pGate, pPin ) + Sfm_TimEdgeRequired( p, pNode, i++, pPin ); + assert( i == Mio_GateReadPinNum(pGate) ); +} + + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Sfm_TimCriticalPath_int( Sfm_Tim_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_TimSlack(p, pNext) <= SlackMax ) + Sfm_TimCriticalPath_int( p, pNext, vPath, SlackMax ); + } + if ( Abc_ObjFaninNum(pObj) > 0 ) + Vec_IntPush( vPath, Abc_ObjId(pObj) ); +} +int Sfm_TimCriticalPath( Sfm_Tim_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_TimSlack(p, pNext) <= SlackMax ) + Sfm_TimCriticalPath_int( p, pNext, &p->vPath, SlackMax ); + } + return Vec_IntSize(&p->vPath); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Sfm_TimTrace( Sfm_Tim_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_TimGateArrival( p, pObj ); + Abc_NtkForEachCo( p->pNtk, pObj, i ) + Delay = Abc_MaxInt( Delay, Sfm_TimArrMax(p, Abc_ObjFanin0(pObj)) ); + Abc_NtkForEachCo( p->pNtk, pObj, i ) + Sfm_TimSetReq( p, Abc_ObjFanin0(pObj), Delay ); + Vec_PtrForEachEntryReverse( Abc_Obj_t *, vNodes, pObj, i ) + Sfm_TimGateRequired( p, pObj ); + Vec_PtrFree( vNodes ); + return Delay; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Sfm_Tim_t * Sfm_TimStart( Mio_Library_t * pLib, Scl_Con_t * pExt, Abc_Ntk_t * pNtk ) +{ +// Abc_Obj_t * pObj; int i; + Sfm_Tim_t * p = ABC_CALLOC( Sfm_Tim_t, 1 ); + p->pLib = pLib; + p->pExt = pExt; + p->pNtk = pNtk; + Vec_IntFill( &p->vTimArrs, 2*Abc_NtkObjNumMax(pNtk), 0 ); + Vec_IntFill( &p->vTimReqs, 2*Abc_NtkObjNumMax(pNtk), 0 ); +// Vec_IntFill( &p->vTimSlews, 2*Abc_NtkObjNumMax(pNtk), 0 ); +// Vec_IntFill( &p->vTimLoads, 2*Abc_NtkObjNumMax(pNtk), 0 ); +// Vec_IntFill( &p->vObjOffs, 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 ); +// } + return p; +} +void Sfm_TimStop( Sfm_Tim_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_IntErase( &p->vPath ); + ABC_FREE( p ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Sfm_TimTest( Abc_Ntk_t * pNtk ) +{ + Mio_Library_t * pLib = (Mio_Library_t *)pNtk->pManFunc; + Sfm_Tim_t * p = Sfm_TimStart( pLib, NULL, pNtk ); + p->Delay = Sfm_TimTrace( p ); + printf( "Max delay = %.2f. Path = %d (%d).\n", MIO_NUMINV*p->Delay, Sfm_TimCriticalPath(p, 1), Abc_NtkNodeNum(p->pNtk) ); + Sfm_TimStop( p ); +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + +ABC_NAMESPACE_IMPL_END + |