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/**CFile****************************************************************
FileName [fpgaSwitch.c]
PackageName [MVSIS 1.3: Multi-valued logic synthesis system.]
Synopsis [Generic technology mapping engine.]
Author [MVSIS Group]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - September 8, 2003.]
Revision [$Id: fpgaSwitch.h,v 1.0 2003/09/08 00:00:00 alanmi Exp $]
***********************************************************************/
#include "fpgaInt.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**function*************************************************************
synopsis [Computes the exact area associated with the cut.]
description []
sideeffects []
seealso []
***********************************************************************/
float Fpga_CutGetSwitchDerefed( Fpga_Man_t * pMan, Fpga_Node_t * pNode, Fpga_Cut_t * pCut )
{
float aResult, aResult2;
aResult2 = Fpga_CutRefSwitch( pMan, pNode, pCut, 0 );
aResult = Fpga_CutDerefSwitch( pMan, pNode, pCut, 0 );
// assert( aResult == aResult2 );
return aResult;
}
/**function*************************************************************
synopsis [References the cut.]
description [This procedure is similar to the procedure NodeReclaim.]
sideeffects []
seealso []
***********************************************************************/
float Fpga_CutRefSwitch( Fpga_Man_t * pMan, Fpga_Node_t * pNode, Fpga_Cut_t * pCut, int fFanouts )
{
Fpga_Node_t * pNodeChild;
float aArea;
int i;
// start the area of this cut
aArea = pNode->Switching;
if ( pCut->nLeaves == 1 )
return aArea;
// go through the children
for ( i = 0; i < pCut->nLeaves; i++ )
{
pNodeChild = pCut->ppLeaves[i];
assert( pNodeChild->nRefs >= 0 );
if ( pNodeChild->nRefs++ > 0 )
continue;
aArea += Fpga_CutRefSwitch( pMan, pNodeChild, pNodeChild->pCutBest, fFanouts );
}
return aArea;
}
/**function*************************************************************
synopsis [Dereferences the cut.]
description [This procedure is similar to the procedure NodeRecusiveDeref.]
sideeffects []
seealso []
***********************************************************************/
float Fpga_CutDerefSwitch( Fpga_Man_t * pMan, Fpga_Node_t * pNode, Fpga_Cut_t * pCut, int fFanouts )
{
Fpga_Node_t * pNodeChild;
float aArea;
int i;
// start the area of this cut
aArea = pNode->Switching;
if ( pCut->nLeaves == 1 )
return aArea;
// go through the children
for ( i = 0; i < pCut->nLeaves; i++ )
{
pNodeChild = pCut->ppLeaves[i];
assert( pNodeChild->nRefs > 0 );
if ( --pNodeChild->nRefs > 0 )
continue;
aArea += Fpga_CutDerefSwitch( pMan, pNodeChild, pNodeChild->pCutBest, fFanouts );
}
return aArea;
}
/**Function*************************************************************
Synopsis [Computes the array of mapping.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
float Fpga_MappingGetSwitching( Fpga_Man_t * pMan, Fpga_NodeVec_t * vMapping )
{
Fpga_Node_t * pNode;
float Switch;
int i;
Switch = 0.0;
for ( i = 0; i < vMapping->nSize; i++ )
{
pNode = vMapping->pArray[i];
// at least one phase has the best cut assigned
assert( !Fpga_NodeIsAnd(pNode) || pNode->pCutBest != NULL );
// at least one phase is used in the mapping
assert( pNode->nRefs > 0 );
// compute the array due to the supergate
Switch += pNode->Switching;
}
// add buffer for each CO driven by a CI
for ( i = 0; i < pMan->nOutputs; i++ )
if ( Fpga_NodeIsVar(pMan->pOutputs[i]) && !Fpga_IsComplement(pMan->pOutputs[i]) )
Switch += pMan->pOutputs[i]->Switching;
return Switch;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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