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/**CFile****************************************************************
FileName [decAbc.c]
PackageName [MVSIS 2.0: Multi-valued logic synthesis system.]
Synopsis [Interface between the decomposition package and ABC network.]
Author [MVSIS Group]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - February 1, 2003.]
Revision [$Id: decAbc.c,v 1.1 2003/05/22 19:20:05 alanmi Exp $]
***********************************************************************/
#include "abc.h"
#include "dec.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Transforms the decomposition graph into the AIG.]
Description [AIG nodes for the fanins should be assigned to pNode->pFunc
of the leaves of the graph before calling this procedure.]
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Obj_t * Dec_GraphToNetwork( Abc_Aig_t * pMan, Dec_Graph_t * pGraph )
{
Abc_Obj_t * pAnd0, * pAnd1;
Dec_Node_t * pNode;
int i;
// check for constant function
if ( Dec_GraphIsConst(pGraph) )
return Abc_ObjNotCond( Abc_AigConst1(pMan), Dec_GraphIsComplement(pGraph) );
// check for a literal
if ( Dec_GraphIsVar(pGraph) )
return Abc_ObjNotCond( Dec_GraphVar(pGraph)->pFunc, Dec_GraphIsComplement(pGraph) );
// build the AIG nodes corresponding to the AND gates of the graph
Dec_GraphForEachNode( pGraph, pNode, i )
{
pAnd0 = Abc_ObjNotCond( Dec_GraphNode(pGraph, pNode->eEdge0.Node)->pFunc, pNode->eEdge0.fCompl );
pAnd1 = Abc_ObjNotCond( Dec_GraphNode(pGraph, pNode->eEdge1.Node)->pFunc, pNode->eEdge1.fCompl );
pNode->pFunc = Abc_AigAnd( pMan, pAnd0, pAnd1 );
}
// complement the result if necessary
return Abc_ObjNotCond( pNode->pFunc, Dec_GraphIsComplement(pGraph) );
}
/**Function*************************************************************
Synopsis [Counts the number of new nodes added when using this graph.]
Description [AIG nodes for the fanins should be assigned to pNode->pFunc
of the leaves of the graph before calling this procedure.
Returns -1 if the number of nodes and levels exceeded the given limit or
the number of levels exceeded the maximum allowed level.]
SideEffects []
SeeAlso []
***********************************************************************/
int Dec_GraphToNetworkCount( Abc_Obj_t * pRoot, Dec_Graph_t * pGraph, int NodeMax, int LevelMax )
{
Abc_Aig_t * pMan = pRoot->pNtk->pManFunc;
Dec_Node_t * pNode, * pNode0, * pNode1;
Abc_Obj_t * pAnd, * pAnd0, * pAnd1;
int i, Counter, LevelNew, LevelOld;
// check for constant function or a literal
if ( Dec_GraphIsConst(pGraph) || Dec_GraphIsVar(pGraph) )
return 0;
// set the levels of the leaves
Dec_GraphForEachLeaf( pGraph, pNode, i )
pNode->Level = Abc_ObjRegular(pNode->pFunc)->Level;
// compute the AIG size after adding the internal nodes
Counter = 0;
Dec_GraphForEachNode( pGraph, pNode, i )
{
// get the children of this node
pNode0 = Dec_GraphNode( pGraph, pNode->eEdge0.Node );
pNode1 = Dec_GraphNode( pGraph, pNode->eEdge1.Node );
// get the AIG nodes corresponding to the children
pAnd0 = pNode0->pFunc;
pAnd1 = pNode1->pFunc;
if ( pAnd0 && pAnd1 )
{
// if they are both present, find the resulting node
pAnd0 = Abc_ObjNotCond( pAnd0, pNode->eEdge0.fCompl );
pAnd1 = Abc_ObjNotCond( pAnd1, pNode->eEdge1.fCompl );
pAnd = Abc_AigAndLookup( pMan, pAnd0, pAnd1 );
// return -1 if the node is the same as the original root
if ( Abc_ObjRegular(pAnd) == pRoot )
return -1;
}
else
pAnd = NULL;
// count the number of added nodes
if ( pAnd == NULL || Abc_NodeIsTravIdCurrent(Abc_ObjRegular(pAnd)) )
{
if ( ++Counter > NodeMax )
return -1;
}
// count the number of new levels
LevelNew = 1 + ABC_MAX( pNode0->Level, pNode1->Level );
if ( pAnd )
{
if ( Abc_ObjRegular(pAnd) == Abc_AigConst1(pMan) )
LevelNew = 0;
else if ( Abc_ObjRegular(pAnd) == Abc_ObjRegular(pAnd0) )
LevelNew = (int)Abc_ObjRegular(pAnd0)->Level;
else if ( Abc_ObjRegular(pAnd) == Abc_ObjRegular(pAnd1) )
LevelNew = (int)Abc_ObjRegular(pAnd1)->Level;
LevelOld = (int)Abc_ObjRegular(pAnd)->Level;
assert( LevelNew == LevelOld );
}
if ( LevelNew > LevelMax )
return -1;
pNode->pFunc = pAnd;
pNode->Level = LevelNew;
}
return Counter;
}
/**Function*************************************************************
Synopsis [Replaces MFFC of the node by the new factored form.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dec_GraphUpdateNetwork( Abc_Obj_t * pRoot, Dec_Graph_t * pGraph, int nGain )
{
Abc_Obj_t * pRootNew;
Abc_Ntk_t * pNtk = pRoot->pNtk;
int nNodesNew, nNodesOld;
nNodesOld = Abc_NtkNodeNum(pNtk);
// create the new structure of nodes
pRootNew = Dec_GraphToNetwork( pNtk->pManFunc, pGraph );
// remove the old nodes
Abc_AigReplace( pNtk->pManFunc, pRoot, pRootNew );
// compare the gains
nNodesNew = Abc_NtkNodeNum(pNtk);
assert( nGain <= nNodesOld - nNodesNew );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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