/**Function*************************************************************
Synopsis [Creates a new node.]
Description [This procedure should be called to create the constant
node and the PI nodes first.]
SideEffects []
SeeAlso []
***********************************************************************/
Fraig_Node_t * Fraig_NodeCreate( Fraig_Man_t * p, Fraig_Node_t * p1, Fraig_Node_t * p2 )
{
Fraig_Node_t * pNode;
int clk;
// create the node
pNode = (Fraig_Node_t *)Fraig_MemFixedEntryFetch( p->mmNodes );
memset( pNode, 0, sizeof(Fraig_Node_t) );
// assign the children
pNode->p1 = p1; Fraig_Ref(p1); Fraig_Regular(p1)->nRefs++;
pNode->p2 = p2; Fraig_Ref(p2); Fraig_Regular(p2)->nRefs++;
// assign the number and add to the array of nodes
pNode->Num = p->vNodes->nSize;
Fraig_NodeVecPush( p->vNodes, pNode );
// assign the PI number
pNode->NumPi = -1;
// compute the level of this node
pNode->Level = 1 + FRAIG_MAX(Fraig_Regular(p1)->Level, Fraig_Regular(p2)->Level);
pNode->fInv = Fraig_NodeIsSimComplement(p1) & Fraig_NodeIsSimComplement(p2);
pNode->fFailTfo = Fraig_Regular(p1)->fFailTfo | Fraig_Regular(p2)->fFailTfo;
// derive the simulation info
clk = clock();
// allocate memory for the simulation info
pNode->puSimR = (unsigned *)Fraig_MemFixedEntryFetch( p->mmSims );
pNode->puSimD = pNode->puSimR + p->nWordsRand;
// derive random simulation info
pNode->uHashR = 0;
Fraig_NodeSimulate( pNode, 0, p->nWordsRand, 1 );
// derive dynamic simulation info
pNode->uHashD = 0;
Fraig_NodeSimulate( pNode, 0, p->iWordStart, 0 );
// count the number of ones in the random simulation info
pNode->nOnes = Fraig_BitStringCountOnes( pNode->puSimR, p->nWordsRand );
if ( pNode->fInv )
pNode->nOnes = p->nWordsRand * 32 - pNode->nOnes;
// add to the runtime of simulation
p->timeSims += clock() - clk;
#ifdef FRAIG_ENABLE_FANOUTS
// create the fanout info
Fraig_NodeAddFaninFanout( Fraig_Regular(p1), pNode );
Fraig_NodeAddFaninFanout( Fraig_Regular(p2), pNode );
#endif
return pNode;
}
/**Function*************************************************************
Synopsis [Collect variables using their proximity from the nodes.]
Description [This procedure creates a variable order based on collecting
first the nodes that are the closest to the given two target nodes.]
SideEffects []
SeeAlso []
***********************************************************************/
void Fraig_SetActivity( Fraig_Man_t * pMan, Fraig_Node_t * pOld, Fraig_Node_t * pNew )
{
Fraig_Node_t * pNode;
int i, Number, MaxLevel;
float * pFactors = Msat_SolverReadFactors(pMan->pSat);
if ( pFactors == NULL )
return;
MaxLevel = FRAIG_MAX( pOld->Level, pNew->Level );
// create the variable order
for ( i = 0; i < Msat_IntVecReadSize(pMan->vVarsInt); i++ )
{
// get the new node on the frontier
Number = Msat_IntVecReadEntry(pMan->vVarsInt, i);
pNode = pMan->vNodes->pArray[Number];
pFactors[pNode->Num] = (float)pow( 0.97, MaxLevel - pNode->Level );
// if ( pNode->Num % 50 == 0 )
// printf( "(%d) %.2f ", MaxLevel - pNode->Level, pFactors[pNode->Num] );
}
// printf( "\n" );
}
