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/**CFile****************************************************************
FileName [mapperTruth.c]
PackageName [MVSIS 1.3: Multi-valued logic synthesis system.]
Synopsis [Generic technology mapping engine.]
Author [MVSIS Group]
Affiliation [UC Berkeley]
Date [Ver. 2.0. Started - June 1, 2004.]
Revision [$Id: mapperTruth.c,v 1.8 2005/01/23 06:59:45 alanmi Exp $]
***********************************************************************/
#include "mapperInt.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
static void Map_TruthsCut( Map_Man_t * pMan, Map_Cut_t * pCut );
static void Map_TruthsCutOne( Map_Man_t * p, Map_Cut_t * pCut, unsigned uTruth[] );
static void Map_CutsCollect_rec( Map_Cut_t * pCut, Map_NodeVec_t * vVisited );
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Derives truth tables for each cut.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Map_MappingTruths( Map_Man_t * pMan )
{
ProgressBar * pProgress;
Map_Node_t * pNode;
Map_Cut_t * pCut;
int nNodes, i;
// compute the cuts for the POs
nNodes = pMan->vAnds->nSize;
pProgress = Extra_ProgressBarStart( stdout, nNodes );
for ( i = 0; i < nNodes; i++ )
{
pNode = pMan->vAnds->pArray[i];
if ( !Map_NodeIsAnd( pNode ) )
continue;
assert( pNode->pCuts );
assert( pNode->pCuts->nLeaves == 1 );
// match the simple cut
pNode->pCuts->M[0].uPhase = 0;
pNode->pCuts->M[0].pSupers = pMan->pSuperLib->pSuperInv;
pNode->pCuts->M[0].uPhaseBest = 0;
pNode->pCuts->M[0].pSuperBest = pMan->pSuperLib->pSuperInv;
pNode->pCuts->M[1].uPhase = 0;
pNode->pCuts->M[1].pSupers = pMan->pSuperLib->pSuperInv;
pNode->pCuts->M[1].uPhaseBest = 1;
pNode->pCuts->M[1].pSuperBest = pMan->pSuperLib->pSuperInv;
// match the rest of the cuts
for ( pCut = pNode->pCuts->pNext; pCut; pCut = pCut->pNext )
Map_TruthsCut( pMan, pCut );
Extra_ProgressBarUpdate( pProgress, i, "Tables ..." );
}
Extra_ProgressBarStop( pProgress );
}
/**Function*************************************************************
Synopsis [Derives the truth table for one cut.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Map_TruthsCut( Map_Man_t * p, Map_Cut_t * pCut )
{
unsigned uTruth[2], uCanon[2];
unsigned char uPhases[16];
// generally speaking, 1-input cut can be matched into a wire!
if ( pCut->nLeaves == 1 )
return;
Map_TruthsCutOne( p, pCut, uTruth );
//assert( pCut->nLeaves < 5 );
//Rwt_ManExploreCount( uTruth[0] & 0xFFFF );
// compute the canonical form for the positive phase
Map_CanonComputeSlow( p->uTruths, p->nVarsMax, pCut->nLeaves, uTruth, uPhases, uCanon );
pCut->M[1].pSupers = Map_SuperTableLookupC( p->pSuperLib, uCanon );
pCut->M[1].uPhase = uPhases[0];
p->nCanons++;
// compute the canonical form for the negative phase
uTruth[0] = ~uTruth[0];
uTruth[1] = ~uTruth[1];
Map_CanonComputeSlow( p->uTruths, p->nVarsMax, pCut->nLeaves, uTruth, uPhases, uCanon );
pCut->M[0].pSupers = Map_SuperTableLookupC( p->pSuperLib, uCanon );
pCut->M[0].uPhase = uPhases[0];
p->nCanons++;
// restore the truth table
uTruth[0] = ~uTruth[0];
uTruth[1] = ~uTruth[1];
}
/**Function*************************************************************
Synopsis [Computes the truth table of one cut.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Map_TruthsCutOne( Map_Man_t * p, Map_Cut_t * pCut, unsigned uTruth[] )
{
unsigned uTruth1[2], uTruth2[2];
Map_Cut_t * pTemp;
int i;
// mark the cut leaves
for ( i = 0; i < pCut->nLeaves; i++ )
{
pTemp = pCut->ppLeaves[i]->pCuts;
pTemp->fMark = 1;
pTemp->M[0].uPhaseBest = p->uTruths[i][0];
pTemp->M[1].uPhaseBest = p->uTruths[i][1];
}
assert( pCut->fMark == 0 );
// collect the cuts in the cut cone
p->vVisited->nSize = 0;
Map_CutsCollect_rec( pCut, p->vVisited );
assert( p->vVisited->nSize > 0 );
pCut->nVolume = p->vVisited->nSize;
// compute the tables and unmark
for ( i = 0; i < pCut->nLeaves; i++ )
{
pTemp = pCut->ppLeaves[i]->pCuts;
pTemp->fMark = 0;
}
for ( i = 0; i < p->vVisited->nSize; i++ )
{
// get the cut
pTemp = (Map_Cut_t *)p->vVisited->pArray[i];
pTemp->fMark = 0;
// get truth table of the first branch
if ( Map_CutIsComplement(pTemp->pOne) )
{
uTruth1[0] = ~Map_CutRegular(pTemp->pOne)->M[0].uPhaseBest;
uTruth1[1] = ~Map_CutRegular(pTemp->pOne)->M[1].uPhaseBest;
}
else
{
uTruth1[0] = Map_CutRegular(pTemp->pOne)->M[0].uPhaseBest;
uTruth1[1] = Map_CutRegular(pTemp->pOne)->M[1].uPhaseBest;
}
// get truth table of the second branch
if ( Map_CutIsComplement(pTemp->pTwo) )
{
uTruth2[0] = ~Map_CutRegular(pTemp->pTwo)->M[0].uPhaseBest;
uTruth2[1] = ~Map_CutRegular(pTemp->pTwo)->M[1].uPhaseBest;
}
else
{
uTruth2[0] = Map_CutRegular(pTemp->pTwo)->M[0].uPhaseBest;
uTruth2[1] = Map_CutRegular(pTemp->pTwo)->M[1].uPhaseBest;
}
// get the truth table of the output
if ( !pTemp->Phase )
{
pTemp->M[0].uPhaseBest = uTruth1[0] & uTruth2[0];
pTemp->M[1].uPhaseBest = uTruth1[1] & uTruth2[1];
}
else
{
pTemp->M[0].uPhaseBest = ~(uTruth1[0] & uTruth2[0]);
pTemp->M[1].uPhaseBest = ~(uTruth1[1] & uTruth2[1]);
}
}
uTruth[0] = pTemp->M[0].uPhaseBest;
uTruth[1] = pTemp->M[1].uPhaseBest;
}
/**Function*************************************************************
Synopsis [Recursively collect the cuts.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Map_CutsCollect_rec( Map_Cut_t * pCut, Map_NodeVec_t * vVisited )
{
if ( pCut->fMark )
return;
Map_CutsCollect_rec( Map_CutRegular(pCut->pOne), vVisited );
Map_CutsCollect_rec( Map_CutRegular(pCut->pTwo), vVisited );
assert( pCut->fMark == 0 );
pCut->fMark = 1;
Map_NodeVecPush( vVisited, (Map_Node_t *)pCut );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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