/**Function*************************************************************
Synopsis [Duplicates AIG in the DFS order.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Gia_Man_t * Gia_ManFromAigSimple( Aig_Man_t * p )
{
Gia_Man_t * pNew;
Aig_Obj_t * pObj;
int i;
// create the new manager
pNew = Gia_ManStart( Aig_ManObjNum(p) );
pNew->pName = Gia_UtilStrsav( p->pName );
pNew->nConstrs = p->nConstrs;
// create the PIs
Aig_ManCleanData( p );
Aig_ManForEachObj( p, pObj, i )
{
if ( Aig_ObjIsAnd(pObj) )
pObj->iData = Gia_ManAppendAnd( pNew, Gia_ObjChild0Copy(pObj), Gia_ObjChild1Copy(pObj) );
else if ( Aig_ObjIsPi(pObj) )
pObj->iData = Gia_ManAppendCi( pNew );
else if ( Aig_ObjIsPo(pObj) )
pObj->iData = Gia_ManAppendCo( pNew, Gia_ObjChild0Copy(pObj) );
else if ( Aig_ObjIsConst1(pObj) )
pObj->iData = 1;
else
assert( 0 );
}
Gia_ManSetRegNum( pNew, Aig_ManRegNum(p) );
return pNew;
}
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Detects multi-input AND gate rooted at this node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_ManFindImplications_rec( Aig_Obj_t * pObj, Vec_Ptr_t * vImplics )
{
if ( Aig_IsComplement(pObj) || Aig_ObjIsPi(pObj) )
{
Vec_PtrPushUnique( vImplics, pObj );
return;
}
Aig_ManFindImplications_rec( Aig_ObjChild0(pObj), vImplics );
Aig_ManFindImplications_rec( Aig_ObjChild1(pObj), vImplics );
}
/**Function*************************************************************
Synopsis [Connect the object to the fanin.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_ObjConnect( Aig_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pFan0, Aig_Obj_t * pFan1 )
{
assert( !Aig_IsComplement(pObj) );
assert( !Aig_ObjIsPi(pObj) );
// add the first fanin
pObj->pFanin0 = pFan0;
pObj->pFanin1 = pFan1;
// increment references of the fanins and add their fanouts
if ( pFan0 != NULL )
{
assert( Aig_ObjFanin0(pObj)->Type > 0 );
Aig_ObjRef( Aig_ObjFanin0(pObj) );
if ( p->pFanData )
Aig_ObjAddFanout( p, Aig_ObjFanin0(pObj), pObj );
}
if ( pFan1 != NULL )
{
assert( Aig_ObjFanin1(pObj)->Type > 0 );
Aig_ObjRef( Aig_ObjFanin1(pObj) );
if ( p->pFanData )
Aig_ObjAddFanout( p, Aig_ObjFanin1(pObj), pObj );
}
// set level and phase
pObj->Level = Aig_ObjLevelNew( pObj );
pObj->fPhase = Aig_ObjPhaseReal(pFan0) & Aig_ObjPhaseReal(pFan1);
// add the node to the structural hash table
if ( p->pTable && Aig_ObjIsHash(pObj) )
Aig_TableInsert( p, pObj );
// add the node to the dynamically updated topological order
// if ( p->pOrderData && Aig_ObjIsNode(pObj) )
// Aig_ObjOrderInsert( p, pObj->Id );
assert( !Aig_ObjIsNode(pObj) || pObj->Level > 0 );
}
/**Function*************************************************************
Synopsis [Creates fast simulation manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Saig_SimObj_t * Saig_ManCreateMan( Aig_Man_t * p )
{
Saig_SimObj_t * pAig, * pEntry;
Aig_Obj_t * pObj;
int i;
pAig = ABC_CALLOC( Saig_SimObj_t, Aig_ManObjNumMax(p)+1 );
// printf( "Allocating %7.2f Mb.\n", 1.0 * sizeof(Saig_SimObj_t) * (Aig_ManObjNumMax(p)+1)/(1<<20) );
Aig_ManForEachObj( p, pObj, i )
{
pEntry = pAig + i;
pEntry->Type = pObj->Type;
if ( Aig_ObjIsPi(pObj) || i == 0 )
{
if ( Saig_ObjIsLo(p, pObj) )
{
pEntry->iFan0 = (Saig_ObjLoToLi(p, pObj)->Id << 1);
pEntry->iFan1 = -1;
}
continue;
}
pEntry->iFan0 = (Aig_ObjFaninId0(pObj) << 1) | Aig_ObjFaninC0(pObj);
if ( Aig_ObjIsPo(pObj) )
continue;
assert( Aig_ObjIsNode(pObj) );
pEntry->iFan1 = (Aig_ObjFaninId1(pObj) << 1) | Aig_ObjFaninC1(pObj);
}
/**Function*************************************************************
Synopsis [Replaces one object by another.]
Description [The new object (pObjNew) should be used instead of the old
object (pObjOld). If the new object is complemented or used, the buffer
is added and the new object remains in the manager; otherwise, the new
object is deleted.]
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_ObjReplace( Aig_Man_t * p, Aig_Obj_t * pObjOld, Aig_Obj_t * pObjNew, int fNodesOnly, int fUpdateLevel )
{
Aig_Obj_t * pObjNewR = Aig_Regular(pObjNew);
// the object to be replaced cannot be complemented
assert( !Aig_IsComplement(pObjOld) );
// the object to be replaced cannot be a terminal
assert( !Aig_ObjIsPi(pObjOld) && !Aig_ObjIsPo(pObjOld) );
// the object to be used cannot be a buffer or a PO
assert( !Aig_ObjIsBuf(pObjNewR) && !Aig_ObjIsPo(pObjNewR) );
// the object cannot be the same
assert( pObjOld != pObjNewR );
// make sure object is not pointing to itself
assert( pObjOld != Aig_ObjFanin0(pObjNewR) );
assert( pObjOld != Aig_ObjFanin1(pObjNewR) );
// recursively delete the old node - but leave the object there
pObjNewR->nRefs++;
Aig_ObjDelete_rec( p, pObjOld, 0 );
pObjNewR->nRefs--;
// if the new object is complemented or already used, create a buffer
p->nObjs[pObjOld->Type]--;
if ( Aig_IsComplement(pObjNew) || Aig_ObjRefs(pObjNew) > 0 || (fNodesOnly && !Aig_ObjIsNode(pObjNew)) )
{
pObjOld->Type = AIG_OBJ_BUF;
Aig_ObjConnect( p, pObjOld, pObjNew, NULL );
p->nBufReplaces++;
}
else
{
Aig_Obj_t * pFanin0 = pObjNew->pFanin0;
Aig_Obj_t * pFanin1 = pObjNew->pFanin1;
int LevelOld = pObjOld->Level;
pObjOld->Type = pObjNew->Type;
Aig_ObjDisconnect( p, pObjNew );
Aig_ObjConnect( p, pObjOld, pFanin0, pFanin1 );
// delete the new object
Aig_ObjDelete( p, pObjNew );
// update levels
if ( p->pFanData )
{
pObjOld->Level = LevelOld;
Aig_ManUpdateLevel( p, pObjOld );
}
if ( fUpdateLevel )
{
Aig_ObjClearReverseLevel( p, pObjOld );
Aig_ManUpdateReverseLevel( p, pObjOld );
}
}
p->nObjs[pObjOld->Type]++;
// store buffers if fanout is allocated
if ( p->pFanData && Aig_ObjIsBuf(pObjOld) )
{
Vec_PtrPush( p->vBufs, pObjOld );
p->nBufMax = AIG_MAX( p->nBufMax, Vec_PtrSize(p->vBufs) );
Aig_ManPropagateBuffers( p, fNodesOnly, fUpdateLevel );
}
}
/**Function*************************************************************
Synopsis [Checks the consistency of phase assignment.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_ManCheckPhase( Aig_Man_t * p )
{
Aig_Obj_t * pObj;
int i;
Aig_ManForEachObj( p, pObj, i )
if ( Aig_ObjIsPi(pObj) )
assert( (int)pObj->fPhase == 0 );
else
assert( (int)pObj->fPhase == (Aig_ObjPhaseReal(Aig_ObjChild0(pObj)) & Aig_ObjPhaseReal(Aig_ObjChild1(pObj))) );
}
/**Function*************************************************************
Synopsis [Returns 1 if the cone of the node overlaps with the vector.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Obj_t * Aig_ManDeriveNewCone_rec( Aig_Man_t * p, Aig_Obj_t * pNode )
{
if ( Aig_ObjIsTravIdCurrent( p, pNode ) )
return (Aig_Obj_t *)pNode->pData;
Aig_ObjSetTravIdCurrent( p, pNode );
if ( Aig_ObjIsPi(pNode) )
return (Aig_Obj_t *)(pNode->pData = pNode);
Aig_ManDeriveNewCone_rec( p, Aig_ObjFanin0(pNode) );
Aig_ManDeriveNewCone_rec( p, Aig_ObjFanin1(pNode) );
return (Aig_Obj_t *)(pNode->pData = Aig_And( p, Aig_ObjChild0Copy(pNode), Aig_ObjChild1Copy(pNode) ));
}
/**Function*************************************************************
Synopsis [Returns 1 if the cone of the node overlaps with the vector.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Aig_ManFindConeOverlap_rec( Aig_Man_t * p, Aig_Obj_t * pNode )
{
if ( Aig_ObjIsTravIdPrevious( p, pNode ) )
return 1;
if ( Aig_ObjIsTravIdCurrent( p, pNode ) )
return 0;
Aig_ObjSetTravIdCurrent( p, pNode );
if ( Aig_ObjIsPi(pNode) )
return 0;
if ( Aig_ManFindConeOverlap_rec( p, Aig_ObjFanin0(pNode) ) )
return 1;
if ( Aig_ManFindConeOverlap_rec( p, Aig_ObjFanin1(pNode) ) )
return 1;
return 0;
}
/**Function*************************************************************
Synopsis [Collects the internal and boundary nodes in the derefed MFFC.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_NodeMffsSupp_rec( Aig_Man_t * p, Aig_Obj_t * pNode, unsigned LevelMin, Vec_Ptr_t * vSupp, int fTopmost, Aig_Obj_t * pObjSkip )
{
// skip visited nodes
if ( Aig_ObjIsTravIdCurrent(p, pNode) )
return;
Aig_ObjSetTravIdCurrent(p, pNode);
// add to the new support nodes
if ( !fTopmost && pNode != pObjSkip && (Aig_ObjIsPi(pNode) || pNode->nRefs > 0 || pNode->Level <= LevelMin) )
{
if ( vSupp ) Vec_PtrPush( vSupp, pNode );
return;
}
assert( Aig_ObjIsNode(pNode) );
// recur on the children
Aig_NodeMffsSupp_rec( p, Aig_ObjFanin0(pNode), LevelMin, vSupp, 0, pObjSkip );
Aig_NodeMffsSupp_rec( p, Aig_ObjFanin1(pNode), LevelMin, vSupp, 0, pObjSkip );
}
/**Function*************************************************************
Synopsis [Deletes the MFFC of the node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_ObjDelete_rec( Aig_Man_t * p, Aig_Obj_t * pObj, int fFreeTop )
{
Aig_Obj_t * pFanin0, * pFanin1;
assert( !Aig_IsComplement(pObj) );
if ( Aig_ObjIsConst1(pObj) || Aig_ObjIsPi(pObj) )
return;
assert( !Aig_ObjIsPo(pObj) );
pFanin0 = Aig_ObjFanin0(pObj);
pFanin1 = Aig_ObjFanin1(pObj);
Aig_ObjDisconnect( p, pObj );
if ( fFreeTop )
Aig_ObjDelete( p, pObj );
if ( pFanin0 && !Aig_ObjIsNone(pFanin0) && Aig_ObjRefs(pFanin0) == 0 )
Aig_ObjDelete_rec( p, pFanin0, 1 );
if ( pFanin1 && !Aig_ObjIsNone(pFanin1) && Aig_ObjRefs(pFanin1) == 0 )
Aig_ObjDelete_rec( p, pFanin1, 1 );
}
/**Function*************************************************************
Synopsis [Adds relevant constraints.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Obj_t * Abc_NtkConstructCare_rec( Aig_Man_t * pCare, Aig_Obj_t * pObj, Aig_Man_t * pMan )
{
Aig_Obj_t * pObj0, * pObj1;
if ( Aig_ObjIsTravIdCurrent( pCare, pObj ) )
return (Aig_Obj_t *)pObj->pData;
Aig_ObjSetTravIdCurrent( pCare, pObj );
if ( Aig_ObjIsPi(pObj) )
return (Aig_Obj_t *)(pObj->pData = NULL);
pObj0 = Abc_NtkConstructCare_rec( pCare, Aig_ObjFanin0(pObj), pMan );
if ( pObj0 == NULL )
return (Aig_Obj_t *)(pObj->pData = NULL);
pObj1 = Abc_NtkConstructCare_rec( pCare, Aig_ObjFanin1(pObj), pMan );
if ( pObj1 == NULL )
return (Aig_Obj_t *)(pObj->pData = NULL);
pObj0 = Aig_NotCond( pObj0, Aig_ObjFaninC0(pObj) );
pObj1 = Aig_NotCond( pObj1, Aig_ObjFaninC1(pObj) );
return (Aig_Obj_t *)(pObj->pData = Aig_And( pMan, pObj0, pObj1 ));
}
/**Function*************************************************************
Synopsis [Evaluate the cost of removing the node from the set of leaves.]
Description [Returns the number of new leaves that will be brought in.
Returns large number if the node cannot be removed from the set of leaves.]
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Aig_NodeGetLeafCostOne( Aig_Obj_t * pNode, int nFanoutLimit )
{
int Cost;
// make sure the node is in the construction zone
assert( pNode->fMarkA );
// cannot expand over the PI node
if ( Aig_ObjIsPi(pNode) )
return 999;
// get the cost of the cone
Cost = (!Aig_ObjFanin0(pNode)->fMarkA) + (!Aig_ObjFanin1(pNode)->fMarkA);
// always accept if the number of leaves does not increase
if ( Cost < 2 )
return Cost;
// skip nodes with many fanouts
if ( (int)pNode->nRefs > nFanoutLimit )
return 999;
// return the number of nodes that will be on the leaves if this node is removed
return Cost;
}
/**Function*************************************************************
Synopsis [References the node's MFFC.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Aig_NodeRef_rec( Aig_Obj_t * pNode, unsigned LevelMin )
{
Aig_Obj_t * pFanin;
int Counter = 0;
if ( Aig_ObjIsPi(pNode) )
return 0;
// consider the first fanin
pFanin = Aig_ObjFanin0(pNode);
if ( pFanin->nRefs++ == 0 && (!LevelMin || pFanin->Level > LevelMin) )
Counter += Aig_NodeRef_rec( pFanin, LevelMin );
// skip the buffer
if ( Aig_ObjIsBuf(pNode) )
return Counter;
assert( Aig_ObjIsNode(pNode) );
// consider the second fanin
pFanin = Aig_ObjFanin1(pNode);
if ( pFanin->nRefs++ == 0 && (!LevelMin || pFanin->Level > LevelMin) )
Counter += Aig_NodeRef_rec( pFanin, LevelMin );
return Counter + 1;
}
/**Function*************************************************************
Synopsis [References the node's MFFC.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Aig_NodeRefLabel_rec( Aig_Man_t * p, Aig_Obj_t * pNode, unsigned LevelMin )
{
Aig_Obj_t * pFanin;
int Counter = 0;
if ( Aig_ObjIsPi(pNode) )
return 0;
Aig_ObjSetTravIdCurrent( p, pNode );
// consider the first fanin
pFanin = Aig_ObjFanin0(pNode);
if ( pFanin->nRefs++ == 0 && (!LevelMin || pFanin->Level > LevelMin) )
Counter += Aig_NodeRefLabel_rec( p, pFanin, LevelMin );
if ( Aig_ObjIsBuf(pNode) )
return Counter;
assert( Aig_ObjIsNode(pNode) );
// consider the second fanin
pFanin = Aig_ObjFanin1(pNode);
if ( pFanin->nRefs++ == 0 && (!LevelMin || pFanin->Level > LevelMin) )
Counter += Aig_NodeRefLabel_rec( p, pFanin, LevelMin );
return Counter + 1;
}
/**Function*************************************************************
Synopsis [Replaces the first fanin of the node by the new fanin.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_ObjPatchFanin0( Aig_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pFaninNew )
{
Aig_Obj_t * pFaninOld;
assert( !Aig_IsComplement(pObj) );
assert( Aig_ObjIsPo(pObj) );
pFaninOld = Aig_ObjFanin0(pObj);
// decrement ref and remove fanout
if ( p->pFanData )
Aig_ObjRemoveFanout( p, pFaninOld, pObj );
Aig_ObjDeref( pFaninOld );
// update the fanin
pObj->pFanin0 = pFaninNew;
// increment ref and add fanout
if ( p->pFanData )
Aig_ObjAddFanout( p, Aig_ObjFanin0(pObj), pObj );
Aig_ObjRef( Aig_ObjFanin0(pObj) );
// get rid of old fanin
if ( !Aig_ObjIsPi(pFaninOld) && !Aig_ObjIsConst1(pFaninOld) && Aig_ObjRefs(pFaninOld) == 0 )
Aig_ObjDelete_rec( p, pFaninOld, 1 );
}
// pNtk->nLatches = Aig_ManRegNum(p);
// pNtk->nTruePis = Nwk_ManCiNum(pNtk) - pNtk->nLatches;
// pNtk->nTruePos = Nwk_ManCoNum(pNtk) - pNtk->nLatches;
Aig_ManForEachObj( p, pObj, i )
{
pIfObj = (If_Obj_t *)Vec_PtrEntry( vAigToIf, i );
if ( pIfObj->nRefs == 0 && !If_ObjIsTerm(pIfObj) )
continue;
if ( Aig_ObjIsNode(pObj) )
{
pCutBest = If_ObjCutBest( pIfObj );
nLeaves = If_CutLeaveNum( pCutBest );
ppLeaves = If_CutLeaves( pCutBest );
// create node
pObjNew = Nwk_ManCreateNode( pNtk, nLeaves, pIfObj->nRefs );
for ( k = 0; k < nLeaves; k++ )
{
pObjRepr = (Aig_Obj_t *)Vec_PtrEntry( vIfToAig, ppLeaves[k] );
Nwk_ObjAddFanin( pObjNew, (Nwk_Obj_t *)pObjRepr->pData );
}
// get the functionality
pObjNew->pFunc = Nwk_NodeIfToHop( pNtk->pManHop, pIfMan, pIfObj );
}
else if ( Aig_ObjIsPi(pObj) )
pObjNew = Nwk_ManCreateCi( pNtk, pIfObj->nRefs );
else if ( Aig_ObjIsPo(pObj) )
{
pObjNew = Nwk_ManCreateCo( pNtk );
pObjNew->fInvert = Aig_ObjFaninC0(pObj);
Nwk_ObjAddFanin( pObjNew, (Nwk_Obj_t *)Aig_ObjFanin0(pObj)->pData );
//printf( "%d ", pObjNew->Id );
}
else if ( Aig_ObjIsConst1(pObj) )
{
pObjNew = Nwk_ManCreateNode( pNtk, 0, pIfObj->nRefs );
pObjNew->pFunc = Hop_ManConst1( pNtk->pManHop );
}
else
assert( 0 );
pObj->pData = pObjNew;
}
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Adds strashed nodes for one node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Aig_ManSpeedupNode_rec( Aig_Man_t * pAig, Aig_Obj_t * pNode, Vec_Ptr_t * vNodes )
{
if ( Aig_ObjIsTravIdCurrent(pAig, pNode) )
return 1;
if ( Aig_ObjIsPi(pNode) )
return 0;
assert( Aig_ObjIsNode(pNode) );
Aig_ObjSetTravIdCurrent( pAig, pNode );
if ( !Aig_ManSpeedupNode_rec( pAig, Aig_ObjFanin0(pNode), vNodes ) )
return 0;
if ( !Aig_ManSpeedupNode_rec( pAig, Aig_ObjFanin1(pNode), vNodes ) )
return 0;
Vec_PtrPush( vNodes, pNode );
return 1;
}
/**Function*************************************************************
Synopsis [Sets variable activities in the cone.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Fra_SetActivityFactors_rec( Fra_Man_t * p, Aig_Obj_t * pObj, int LevelMin, int LevelMax )
{
Vec_Ptr_t * vFanins;
Aig_Obj_t * pFanin;
int i, Counter = 0;
assert( !Aig_IsComplement(pObj) );
assert( Fra_ObjSatNum(pObj) );
// skip visited variables
if ( Aig_ObjIsTravIdCurrent(p->pManFraig, pObj) )
return 0;
Aig_ObjSetTravIdCurrent(p->pManFraig, pObj);
// add the PI to the list
if ( pObj->Level <= (unsigned)LevelMin || Aig_ObjIsPi(pObj) )
return 0;
// set the factor of this variable
// (LevelMax-LevelMin) / (pObj->Level-LevelMin) = p->pPars->dActConeBumpMax / ThisBump
p->pSat->factors[Fra_ObjSatNum(pObj)] = p->pPars->dActConeBumpMax * (pObj->Level - LevelMin)/(LevelMax - LevelMin);
veci_push(&p->pSat->act_vars, Fra_ObjSatNum(pObj));
// explore the fanins
vFanins = Fra_ObjFaninVec( pObj );
Vec_PtrForEachEntry( vFanins, pFanin, i )
Counter += Fra_SetActivityFactors_rec( p, Aig_Regular(pFanin), LevelMin, LevelMax );
return 1 + Counter;
}
/**Function*************************************************************
Synopsis [Load the network into FPGA manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
If_Man_t * Nwk_ManToIf( Aig_Man_t * p, If_Par_t * pPars, Vec_Ptr_t * vAigToIf )
{
extern Vec_Int_t * Saig_ManComputeSwitchProbs( Aig_Man_t * p, int nFrames, int nPref, int fProbOne );
Vec_Int_t * vSwitching = NULL, * vSwitching2 = NULL;
float * pSwitching, * pSwitching2;
If_Man_t * pIfMan;
If_Obj_t * pIfObj;
Aig_Obj_t * pNode, * pFanin, * pPrev;
int i, clk = clock();
// set the number of registers (switch activity will be combinational)
Aig_ManSetRegNum( p, 0 );
if ( pPars->fPower )
{
vSwitching = Saig_ManComputeSwitchProbs( p, 48, 16, 0 );
if ( pPars->fVerbose )
{
ABC_PRT( "Computing switching activity", clock() - clk );
}
pSwitching = (float *)vSwitching->pArray;
vSwitching2 = Vec_IntStart( Aig_ManObjNumMax(p) );
pSwitching2 = (float *)vSwitching2->pArray;
}
// start the mapping manager and set its parameters
pIfMan = If_ManStart( pPars );
pIfMan->vSwitching = vSwitching2;
// load the AIG into the mapper
Aig_ManForEachObj( p, pNode, i )
{
if ( Aig_ObjIsAnd(pNode) )
{
pIfObj = If_ManCreateAnd( pIfMan,
If_NotCond( (If_Obj_t *)Aig_ObjFanin0(pNode)->pData, Aig_ObjFaninC0(pNode) ),
If_NotCond( (If_Obj_t *)Aig_ObjFanin1(pNode)->pData, Aig_ObjFaninC1(pNode) ) );
// printf( "no%d=%d\n ", If_ObjId(pIfObj), If_ObjLevel(pIfObj) );
}
else if ( Aig_ObjIsPi(pNode) )
{
pIfObj = If_ManCreateCi( pIfMan );
If_ObjSetLevel( pIfObj, Aig_ObjLevel(pNode) );
// printf( "pi%d=%d\n ", If_ObjId(pIfObj), If_ObjLevel(pIfObj) );
if ( pIfMan->nLevelMax < (int)pIfObj->Level )
pIfMan->nLevelMax = (int)pIfObj->Level;
}
else if ( Aig_ObjIsPo(pNode) )
{
pIfObj = If_ManCreateCo( pIfMan, If_NotCond( (If_Obj_t *)Aig_ObjFanin0(pNode)->pData, Aig_ObjFaninC0(pNode) ) );
// printf( "po%d=%d\n ", If_ObjId(pIfObj), If_ObjLevel(pIfObj) );
}
else if ( Aig_ObjIsConst1(pNode) )
pIfObj = If_ManConst1( pIfMan );
else // add the node to the mapper
assert( 0 );
// save the result
assert( Vec_PtrEntry(vAigToIf, i) == NULL );
Vec_PtrWriteEntry( vAigToIf, i, pIfObj );
pNode->pData = pIfObj;
if ( vSwitching2 )
pSwitching2[pIfObj->Id] = pSwitching[pNode->Id];
// set up the choice node
if ( Aig_ObjIsChoice( p, pNode ) )
{
pIfMan->nChoices++;
for ( pPrev = pNode, pFanin = Aig_ObjEquiv(p, pNode); pFanin; pPrev = pFanin, pFanin = Aig_ObjEquiv(p, pFanin) )
If_ObjSetChoice( (If_Obj_t *)pPrev->pData, (If_Obj_t *)pFanin->pData );
If_ManCreateChoice( pIfMan, (If_Obj_t *)pNode->pData );
}
// assert( If_ObjLevel(pIfObj) == Aig_ObjLevel(pNode) );
}
if ( vSwitching )
Vec_IntFree( vSwitching );
return pIfMan;
}
/**Function*************************************************************
Synopsis [Performs induction by unrolling timeframes backward.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Saig_ManInduction( Aig_Man_t * p, int nFramesMax, int nConfMax, int fUnique, int fUniqueAll, int fGetCex, int fVerbose, int fVeryVerbose )
{
sat_solver * pSat;
Aig_Man_t * pAigPart;
Cnf_Dat_t * pCnfPart;
Vec_Int_t * vTopVarNums, * vState, * vTopVarIds = NULL;
Vec_Ptr_t * vTop, * vBot;
Aig_Obj_t * pObjPi, * pObjPiCopy, * pObjPo;
int i, k, f, clk, Lits[2], status, RetValue, nSatVarNum, nConfPrev;
int nOldSize, iReg, iLast, fAdded, nConstrs = 0, nClauses = 0;
assert( fUnique == 0 || fUniqueAll == 0 );
assert( Saig_ManPoNum(p) == 1 );
Aig_ManSetPioNumbers( p );
// start the top by including the PO
vBot = Vec_PtrAlloc( 100 );
vTop = Vec_PtrAlloc( 100 );
vState = Vec_IntAlloc( 1000 );
Vec_PtrPush( vTop, Aig_ManPo(p, 0) );
// start the array of CNF variables
vTopVarNums = Vec_IntAlloc( 100 );
// start the solver
pSat = sat_solver_new();
sat_solver_setnvars( pSat, 1000 );
// iterate backward unrolling
RetValue = -1;
nSatVarNum = 0;
if ( fVerbose )
printf( "Induction parameters: FramesMax = %5d. ConflictMax = %6d.\n", nFramesMax, nConfMax );
for ( f = 0; ; f++ )
{
if ( f > 0 )
{
Aig_ManStop( pAigPart );
Cnf_DataFree( pCnfPart );
}
clk = clock();
// get the bottom
Aig_SupportNodes( p, (Aig_Obj_t **)Vec_PtrArray(vTop), Vec_PtrSize(vTop), vBot );
// derive AIG for the part between top and bottom
pAigPart = Aig_ManDupSimpleDfsPart( p, vBot, vTop );
// convert it into CNF
pCnfPart = Cnf_Derive( pAigPart, Aig_ManPoNum(pAigPart) );
Cnf_DataLift( pCnfPart, nSatVarNum );
nSatVarNum += pCnfPart->nVars;
nClauses += pCnfPart->nClauses;
// remember top frame var IDs
if ( fGetCex && vTopVarIds == NULL )
{
vTopVarIds = Vec_IntStartFull( Aig_ManPiNum(p) );
Aig_ManForEachPi( p, pObjPi, i )
{
if ( pObjPi->pData == NULL )
continue;
pObjPiCopy = (Aig_Obj_t *)pObjPi->pData;
assert( Aig_ObjIsPi(pObjPiCopy) );
if ( Saig_ObjIsPi(p, pObjPi) )
Vec_IntWriteEntry( vTopVarIds, Aig_ObjPioNum(pObjPi) + Saig_ManRegNum(p), pCnfPart->pVarNums[Aig_ObjId(pObjPiCopy)] );
else if ( Saig_ObjIsLo(p, pObjPi) )
Vec_IntWriteEntry( vTopVarIds, Aig_ObjPioNum(pObjPi) - Saig_ManPiNum(p), pCnfPart->pVarNums[Aig_ObjId(pObjPiCopy)] );
else assert( 0 );
}
}
// stitch variables of top and bot
assert( Aig_ManPoNum(pAigPart)-1 == Vec_IntSize(vTopVarNums) );
Aig_ManForEachPo( pAigPart, pObjPo, i )
{
if ( i == 0 )
{
// do not perform inductive strengthening
// if ( f > 0 )
// continue;
// add topmost literal
Lits[0] = toLitCond( pCnfPart->pVarNums[pObjPo->Id], f>0 );
if ( !sat_solver_addclause( pSat, Lits, Lits+1 ) )
assert( 0 );
nClauses++;
continue;
}
Lits[0] = toLitCond( Vec_IntEntry(vTopVarNums, i-1), 0 );
Lits[1] = toLitCond( pCnfPart->pVarNums[pObjPo->Id], 1 );
if ( !sat_solver_addclause( pSat, Lits, Lits+2 ) )
assert( 0 );
Lits[0] = toLitCond( Vec_IntEntry(vTopVarNums, i-1), 1 );
Lits[1] = toLitCond( pCnfPart->pVarNums[pObjPo->Id], 0 );
if ( !sat_solver_addclause( pSat, Lits, Lits+2 ) )
assert( 0 );
nClauses += 2;
}
// add CNF to the SAT solver
for ( i = 0; i < pCnfPart->nClauses; i++ )
if ( !sat_solver_addclause( pSat, pCnfPart->pClauses[i], pCnfPart->pClauses[i+1] ) )
break;
if ( i < pCnfPart->nClauses )
{
// printf( "SAT solver became UNSAT after adding clauses.\n" );
RetValue = 1;
break;
}
// create new set of POs to derive new top
Vec_PtrClear( vTop );
Vec_PtrPush( vTop, Aig_ManPo(p, 0) );
Vec_IntClear( vTopVarNums );
nOldSize = Vec_IntSize(vState);
Vec_IntFillExtra( vState, nOldSize + Aig_ManRegNum(p), -1 );
Vec_PtrForEachEntry( Aig_Obj_t *, vBot, pObjPi, i )
{
assert( Aig_ObjIsPi(pObjPi) );
if ( Saig_ObjIsLo(p, pObjPi) )
{
pObjPiCopy = (Aig_Obj_t *)pObjPi->pData;
assert( pObjPiCopy != NULL );
Vec_PtrPush( vTop, Saig_ObjLoToLi(p, pObjPi) );
Vec_IntPush( vTopVarNums, pCnfPart->pVarNums[pObjPiCopy->Id] );
iReg = pObjPi->PioNum - Saig_ManPiNum(p);
assert( iReg >= 0 && iReg < Aig_ManRegNum(p) );
Vec_IntWriteEntry( vState, nOldSize+iReg, pCnfPart->pVarNums[pObjPiCopy->Id] );
}
}
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
/*
Speculating reduction in the sequential case leads to an interesting
situation when a counter-ex may not refine any classes. This happens
for non-constant equivalence classes. In such cases the representative
of the class (proved by simulation to be non-constant) may be reduced
to a constant during the speculative reduction. The fraig-representative
of this representative node is a constant node, even though this is a
non-constant class. Experiments have shown that this situation happens
very often at the beginning of the refinement iteration when there are
many spurious candidate equivalence classes (especially if heavy-duty
simulatation of BMC was node used at the beginning). As a result, the
SAT solver run may return a counter-ex that distinguishes the given
representative node from the constant-1 node but this counter-ex
does not distinguish the nodes in the non-costant class... This is why
there is no check of refinement after a counter-ex in the sequential case.
*/
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Reports the status of the miter.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Fra_FraigMiterStatus( Aig_Man_t * p )
{
Aig_Obj_t * pObj, * pChild;
int i, CountConst0 = 0, CountNonConst0 = 0, CountUndecided = 0;
if ( p->pData )
return 0;
Aig_ManForEachPoSeq( p, pObj, i )
{
pChild = Aig_ObjChild0(pObj);
// check if the output is constant 0
if ( pChild == Aig_ManConst0(p) )
{
CountConst0++;
continue;
}
// check if the output is constant 1
if ( pChild == Aig_ManConst1(p) )
{
CountNonConst0++;
continue;
}
// check if the output is a primary input
if ( p->nRegs == 0 && Aig_ObjIsPi(Aig_Regular(pChild)) )
{
CountNonConst0++;
continue;
}
// check if the output can be not constant 0
if ( Aig_Regular(pChild)->fPhase != (unsigned)Aig_IsComplement(pChild) )
{
CountNonConst0++;
continue;
}
CountUndecided++;
}