From 3c9f7d2bc8180462635eda6e1c7ae5b4208f2078 Mon Sep 17 00:00:00 2001 From: Alan Mishchenko Date: Sun, 8 Nov 2015 19:59:34 -0800 Subject: Extending and improving timing manager. --- src/opt/sfm/sfmDec.c | 55 +++++++++++++++++++++++++++++++++++++++------------- src/opt/sfm/sfmInt.h | 3 ++- 2 files changed, 43 insertions(+), 15 deletions(-) (limited to 'src/opt') diff --git a/src/opt/sfm/sfmDec.c b/src/opt/sfm/sfmDec.c index 1240a256..c6da5429 100644 --- a/src/opt/sfm/sfmDec.c +++ b/src/opt/sfm/sfmDec.c @@ -685,18 +685,20 @@ int Sfm_MffcDeref_rec( Abc_Obj_t * pObj ) } return Area; } -int Sfm_MffcRef_rec( Abc_Obj_t * pObj ) +int Sfm_MffcRef_rec( Abc_Obj_t * pObj, Vec_Int_t * vMffc ) { Abc_Obj_t * pFanin; int i, Area = (int)(MIO_NUM*Mio_GateReadArea((Mio_Gate_t *)pObj->pData)); Abc_ObjForEachFanin( pObj, pFanin, i ) { if ( pFanin->vFanouts.nSize++ == 0 && !Abc_ObjIsCi(pFanin) ) - Area += Sfm_MffcRef_rec( pFanin ); + Area += Sfm_MffcRef_rec( pFanin, vMffc ); } + if ( vMffc ) + Vec_IntPush( vMffc, Abc_ObjId(pObj) ); return Area; } -int Sfm_DecMffcAreaReal( Abc_Obj_t * pPivot, Vec_Int_t * vCut ) +int Sfm_DecMffcAreaReal( Abc_Obj_t * pPivot, Vec_Int_t * vCut, Vec_Int_t * vMffc ) { Abc_Ntk_t * pNtk = pPivot->pNtk; Abc_Obj_t * pObj; @@ -705,7 +707,7 @@ int Sfm_DecMffcAreaReal( Abc_Obj_t * pPivot, Vec_Int_t * vCut ) Abc_NtkForEachObjVec( vCut, pNtk, pObj, i ) pObj->vFanouts.nSize++; Area1 = Sfm_MffcDeref_rec( pPivot ); - Area2 = Sfm_MffcRef_rec( pPivot ); + Area2 = Sfm_MffcRef_rec( pPivot, vMffc ); Abc_NtkForEachObjVec( vCut, pNtk, pObj, i ) pObj->vFanouts.nSize--; assert( Area1 == Area2 ); @@ -1149,7 +1151,7 @@ int Sfm_DecPeformDec2( Sfm_Dec_t * p, Abc_Obj_t * pObj ) // compute area savings Sfm_DecPrepareVec( &p->vObjMap, pSupp[i], nSupp[i], &p->vTemp ); - AreaThis = Sfm_DecMffcAreaReal(pObj, &p->vTemp); + AreaThis = Sfm_DecMffcAreaReal(pObj, &p->vTemp, NULL); assert( p->AreaMffc <= AreaThis ); if ( p->pPars->fZeroCost ? (AreaNew > AreaThis) : (AreaNew >= AreaThis) ) continue; @@ -1243,6 +1245,13 @@ int Sfm_DecPeformDec3( Sfm_Dec_t * p, Abc_Obj_t * pObj ) return RetValue; } + // get MFFC + if ( p->pMit ) + { + Sfm_DecPrepareVec( &p->vObjMap, pSupp[i], nSupp[i], &p->vTemp ); + Sfm_DecMffcAreaReal(pObj, &p->vTemp, &p->vTemp2 ); + } + // try the delay p->nSuppVars = nSupp[i]; Abc_TtCopy( p->Copy, uTruth[i], SFM_WORD_MAX, 0 ); @@ -1256,17 +1265,31 @@ int Sfm_DecPeformDec3( Sfm_Dec_t * p, Abc_Obj_t * pObj ) Vec_Int_t vFanins = { nSupp[i], nSupp[i], pSupp[i] }; int Delay; if ( p->pMit ) - Delay = Sfm_MitEvalRemapping( p->pMit, &vFanins, &p->vObjMap, pGate1, pFans1, pGate2, pFans2 ); + { + DelayMin = 0; + Delay = Sfm_MitEvalRemapping( p->pMit, &p->vTemp2, pObj, &vFanins, &p->vObjMap, pGate1, pFans1, pGate2, pFans2 ); + if ( DelayMin < Delay ) + { + DelayMin = Delay; + pGate1Best = pGate1; + pGate2Best = pGate2; + pFans1Best = pFans1; + pFans2Best = pFans2; + iBest = i; + } + } else - Delay = Sfm_TimEvalRemapping( p->pTim, &vFanins, &p->vObjMap, pGate1, pFans1, pGate2, pFans2 ); - if ( DelayMin > Delay ) { - DelayMin = Delay; - pGate1Best = pGate1; - pGate2Best = pGate2; - pFans1Best = pFans1; - pFans2Best = pFans2; - iBest = i; + Delay = Sfm_TimEvalRemapping( p->pTim, &vFanins, &p->vObjMap, pGate1, pFans1, pGate2, pFans2 ); + if ( DelayMin > Delay ) + { + DelayMin = Delay; + pGate1Best = pGate1; + pGate2Best = pGate2; + pFans1Best = pFans1; + pFans2Best = pFans2; + iBest = i; + } } } } @@ -2004,7 +2027,11 @@ p->timeSat += Abc_Clock() - clk; assert( Vec_IntSize(&p->vObjGates) - Limit <= 2 ); 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 ); + // 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(); if ( p->pMit ) Sfm_MitUpdateTiming( p->pMit, &p->vTemp ); diff --git a/src/opt/sfm/sfmInt.h b/src/opt/sfm/sfmInt.h index 874db0e8..3d78d557 100644 --- a/src/opt/sfm/sfmInt.h +++ b/src/opt/sfm/sfmInt.h @@ -231,11 +231,12 @@ 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_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 ); extern int Sfm_MitPriorityNodes( Sfm_Mit_t * p, Vec_Int_t * vCands, int Window ); extern int Sfm_MitNodeIsNonCritical( Sfm_Mit_t * p, Abc_Obj_t * pPivot, Abc_Obj_t * pNode ); -extern 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 ); +extern int Sfm_MitEvalRemapping( Sfm_Mit_t * p, Vec_Int_t * vMffc, Abc_Obj_t * pObj, Vec_Int_t * vFanins, Vec_Int_t * vMap, Mio_Gate_t * pGate1, char * pFans1, Mio_Gate_t * pGate2, char * pFans2 ); /*=== sfmWin.c ==========================================================*/ extern int Sfm_ObjMffcSize( Sfm_Ntk_t * p, int iObj ); extern int Sfm_NtkCreateWindow( Sfm_Ntk_t * p, int iNode, int fVerbose ); -- cgit v1.2.3