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/**CFile****************************************************************
FileName [kitGraph.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Computation kit.]
Synopsis [Decomposition graph representation.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - Dec 6, 2006.]
Revision [$Id: kitGraph.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $]
***********************************************************************/
#include "kit.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Creates a graph with the given number of leaves.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Kit_Graph_t * Kit_GraphCreate( int nLeaves )
{
Kit_Graph_t * pGraph;
pGraph = ALLOC( Kit_Graph_t, 1 );
memset( pGraph, 0, sizeof(Kit_Graph_t) );
pGraph->nLeaves = nLeaves;
pGraph->nSize = nLeaves;
pGraph->nCap = 2 * nLeaves + 50;
pGraph->pNodes = ALLOC( Kit_Node_t, pGraph->nCap );
memset( pGraph->pNodes, 0, sizeof(Kit_Node_t) * pGraph->nSize );
return pGraph;
}
/**Function*************************************************************
Synopsis [Creates constant 0 graph.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Kit_Graph_t * Kit_GraphCreateConst0()
{
Kit_Graph_t * pGraph;
pGraph = ALLOC( Kit_Graph_t, 1 );
memset( pGraph, 0, sizeof(Kit_Graph_t) );
pGraph->fConst = 1;
pGraph->eRoot.fCompl = 1;
return pGraph;
}
/**Function*************************************************************
Synopsis [Creates constant 1 graph.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Kit_Graph_t * Kit_GraphCreateConst1()
{
Kit_Graph_t * pGraph;
pGraph = ALLOC( Kit_Graph_t, 1 );
memset( pGraph, 0, sizeof(Kit_Graph_t) );
pGraph->fConst = 1;
return pGraph;
}
/**Function*************************************************************
Synopsis [Creates the literal graph.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Kit_Graph_t * Kit_GraphCreateLeaf( int iLeaf, int nLeaves, int fCompl )
{
Kit_Graph_t * pGraph;
assert( 0 <= iLeaf && iLeaf < nLeaves );
pGraph = Kit_GraphCreate( nLeaves );
pGraph->eRoot.Node = iLeaf;
pGraph->eRoot.fCompl = fCompl;
return pGraph;
}
/**Function*************************************************************
Synopsis [Creates a graph with the given number of leaves.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Kit_GraphFree( Kit_Graph_t * pGraph )
{
FREE( pGraph->pNodes );
free( pGraph );
}
/**Function*************************************************************
Synopsis [Appends a new node to the graph.]
Description [This procedure is meant for internal use.]
SideEffects []
SeeAlso []
***********************************************************************/
Kit_Node_t * Kit_GraphAppendNode( Kit_Graph_t * pGraph )
{
Kit_Node_t * pNode;
if ( pGraph->nSize == pGraph->nCap )
{
pGraph->pNodes = REALLOC( Kit_Node_t, pGraph->pNodes, 2 * pGraph->nCap );
pGraph->nCap = 2 * pGraph->nCap;
}
pNode = pGraph->pNodes + pGraph->nSize++;
memset( pNode, 0, sizeof(Kit_Node_t) );
return pNode;
}
/**Function*************************************************************
Synopsis [Creates an AND node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Kit_Edge_t Kit_GraphAddNodeAnd( Kit_Graph_t * pGraph, Kit_Edge_t eEdge0, Kit_Edge_t eEdge1 )
{
Kit_Node_t * pNode;
// get the new node
pNode = Kit_GraphAppendNode( pGraph );
// set the inputs and other info
pNode->eEdge0 = eEdge0;
pNode->eEdge1 = eEdge1;
pNode->fCompl0 = eEdge0.fCompl;
pNode->fCompl1 = eEdge1.fCompl;
return Kit_EdgeCreate( pGraph->nSize - 1, 0 );
}
/**Function*************************************************************
Synopsis [Creates an OR node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Kit_Edge_t Kit_GraphAddNodeOr( Kit_Graph_t * pGraph, Kit_Edge_t eEdge0, Kit_Edge_t eEdge1 )
{
Kit_Node_t * pNode;
// get the new node
pNode = Kit_GraphAppendNode( pGraph );
// set the inputs and other info
pNode->eEdge0 = eEdge0;
pNode->eEdge1 = eEdge1;
pNode->fCompl0 = eEdge0.fCompl;
pNode->fCompl1 = eEdge1.fCompl;
// make adjustments for the OR gate
pNode->fNodeOr = 1;
pNode->eEdge0.fCompl = !pNode->eEdge0.fCompl;
pNode->eEdge1.fCompl = !pNode->eEdge1.fCompl;
return Kit_EdgeCreate( pGraph->nSize - 1, 1 );
}
/**Function*************************************************************
Synopsis [Creates an XOR node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Kit_Edge_t Kit_GraphAddNodeXor( Kit_Graph_t * pGraph, Kit_Edge_t eEdge0, Kit_Edge_t eEdge1, int Type )
{
Kit_Edge_t eNode0, eNode1, eNode;
if ( Type == 0 )
{
// derive the first AND
eEdge0.fCompl ^= 1;
eNode0 = Kit_GraphAddNodeAnd( pGraph, eEdge0, eEdge1 );
eEdge0.fCompl ^= 1;
// derive the second AND
eEdge1.fCompl ^= 1;
eNode1 = Kit_GraphAddNodeAnd( pGraph, eEdge0, eEdge1 );
// derive the final OR
eNode = Kit_GraphAddNodeOr( pGraph, eNode0, eNode1 );
}
else
{
// derive the first AND
eNode0 = Kit_GraphAddNodeAnd( pGraph, eEdge0, eEdge1 );
// derive the second AND
eEdge0.fCompl ^= 1;
eEdge1.fCompl ^= 1;
eNode1 = Kit_GraphAddNodeAnd( pGraph, eEdge0, eEdge1 );
// derive the final OR
eNode = Kit_GraphAddNodeOr( pGraph, eNode0, eNode1 );
eNode.fCompl ^= 1;
}
return eNode;
}
/**Function*************************************************************
Synopsis [Creates an XOR node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Kit_Edge_t Kit_GraphAddNodeMux( Kit_Graph_t * pGraph, Kit_Edge_t eEdgeC, Kit_Edge_t eEdgeT, Kit_Edge_t eEdgeE, int Type )
{
Kit_Edge_t eNode0, eNode1, eNode;
if ( Type == 0 )
{
// derive the first AND
eNode0 = Kit_GraphAddNodeAnd( pGraph, eEdgeC, eEdgeT );
// derive the second AND
eEdgeC.fCompl ^= 1;
eNode1 = Kit_GraphAddNodeAnd( pGraph, eEdgeC, eEdgeE );
// derive the final OR
eNode = Kit_GraphAddNodeOr( pGraph, eNode0, eNode1 );
}
else
{
// complement the arguments
eEdgeT.fCompl ^= 1;
eEdgeE.fCompl ^= 1;
// derive the first AND
eNode0 = Kit_GraphAddNodeAnd( pGraph, eEdgeC, eEdgeT );
// derive the second AND
eEdgeC.fCompl ^= 1;
eNode1 = Kit_GraphAddNodeAnd( pGraph, eEdgeC, eEdgeE );
// derive the final OR
eNode = Kit_GraphAddNodeOr( pGraph, eNode0, eNode1 );
eNode.fCompl ^= 1;
}
return eNode;
}
/**Function*************************************************************
Synopsis [Derives the truth table.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
unsigned Kit_GraphToTruth( Kit_Graph_t * pGraph )
{
unsigned uTruths[5] = { 0xAAAAAAAA, 0xCCCCCCCC, 0xF0F0F0F0, 0xFF00FF00, 0xFFFF0000 };
unsigned uTruth = 0, uTruth0, uTruth1;
Kit_Node_t * pNode;
int i;
// sanity checks
assert( Kit_GraphLeaveNum(pGraph) >= 0 );
assert( Kit_GraphLeaveNum(pGraph) <= pGraph->nSize );
assert( Kit_GraphLeaveNum(pGraph) <= 5 );
// check for constant function
if ( Kit_GraphIsConst(pGraph) )
return Kit_GraphIsComplement(pGraph)? 0 : ~((unsigned)0);
// check for a literal
if ( Kit_GraphIsVar(pGraph) )
return Kit_GraphIsComplement(pGraph)? ~uTruths[Kit_GraphVarInt(pGraph)] : uTruths[Kit_GraphVarInt(pGraph)];
// assign the elementary variables
Kit_GraphForEachLeaf( pGraph, pNode, i )
pNode->pFunc = (void *)(long)uTruths[i];
// compute the function for each internal node
Kit_GraphForEachNode( pGraph, pNode, i )
{
uTruth0 = (unsigned)(long)Kit_GraphNode(pGraph, pNode->eEdge0.Node)->pFunc;
uTruth1 = (unsigned)(long)Kit_GraphNode(pGraph, pNode->eEdge1.Node)->pFunc;
uTruth0 = pNode->eEdge0.fCompl? ~uTruth0 : uTruth0;
uTruth1 = pNode->eEdge1.fCompl? ~uTruth1 : uTruth1;
uTruth = uTruth0 & uTruth1;
pNode->pFunc = (void *)(long)uTruth;
}
// complement the result if necessary
return Kit_GraphIsComplement(pGraph)? ~uTruth : uTruth;
}
/**Function*************************************************************
Synopsis [Derives the factored form from the truth table.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Kit_Graph_t * Kit_TruthToGraph( unsigned * pTruth, int nVars, Vec_Int_t * vMemory )
{
Kit_Graph_t * pGraph;
int RetValue;
// derive SOP
RetValue = Kit_TruthIsop( pTruth, nVars, vMemory, 1 ); // tried 1 and found not useful in "renode"
if ( RetValue == -1 )
return NULL;
if ( Vec_IntSize(vMemory) > 128 )
return NULL;
// printf( "Isop size = %d.\n", Vec_IntSize(vMemory) );
assert( RetValue == 0 || RetValue == 1 );
// derive factored form
pGraph = Kit_SopFactor( vMemory, RetValue, nVars, vMemory );
return pGraph;
}
/**Function*************************************************************
Synopsis [Derives the maximum depth from the leaf to the root.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Kit_GraphLeafDepth_rec( Kit_Graph_t * pGraph, Kit_Node_t * pNode, Kit_Node_t * pLeaf )
{
int Depth0, Depth1, Depth;
if ( pNode == pLeaf )
return 0;
if ( Kit_GraphNodeIsVar(pGraph, pNode) )
return -100;
Depth0 = Kit_GraphLeafDepth_rec( pGraph, Kit_GraphNodeFanin0(pGraph, pNode), pLeaf );
Depth1 = Kit_GraphLeafDepth_rec( pGraph, Kit_GraphNodeFanin1(pGraph, pNode), pLeaf );
Depth = KIT_MAX( Depth0, Depth1 );
Depth = (Depth == -100) ? -100 : Depth + 1;
return Depth;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
