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/**CFile****************************************************************
FileName [cutTruth.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [K-feasible cut computation package.]
Synopsis [Incremental truth table computation.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: cutTruth.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "cutInt.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Performs truth table computation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline unsigned Cut_TruthPhase( Cut_Cut_t * pCut, Cut_Cut_t * pCut1 )
{
unsigned uPhase = 0;
int i, k;
for ( i = k = 0; i < (int)pCut->nLeaves; i++ )
{
if ( k == (int)pCut1->nLeaves )
break;
if ( pCut->pLeaves[i] < pCut1->pLeaves[k] )
continue;
assert( pCut->pLeaves[i] == pCut1->pLeaves[k] );
uPhase |= (1 << i);
k++;
}
return uPhase;
}
/**Function*************************************************************
Synopsis [Performs truth table computation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Cut_TruthCompute( Cut_Cut_t * pCut, Cut_Cut_t * pCut0, Cut_Cut_t * pCut1, int fCompl0, int fCompl1 )
{
static unsigned uTruth0[8], uTruth1[8];
int nTruthWords = Cut_TruthWords( pCut->nVarsMax );
unsigned * pTruthRes;
int i, uPhase;
// permute the first table
uPhase = Cut_TruthPhase( pCut, pCut0 );
Extra_TruthExpand( pCut->nVarsMax, nTruthWords, Cut_CutReadTruth(pCut0), uPhase, uTruth0 );
if ( fCompl0 )
{
for ( i = 0; i < nTruthWords; i++ )
uTruth0[i] = ~uTruth0[i];
}
// permute the second table
uPhase = Cut_TruthPhase( pCut, pCut1 );
Extra_TruthExpand( pCut->nVarsMax, nTruthWords, Cut_CutReadTruth(pCut1), uPhase, uTruth1 );
if ( fCompl1 )
{
for ( i = 0; i < nTruthWords; i++ )
uTruth1[i] = ~uTruth1[i];
}
// write the resulting table
pTruthRes = Cut_CutReadTruth(pCut);
if ( pCut->fCompl )
{
for ( i = 0; i < nTruthWords; i++ )
pTruthRes[i] = ~(uTruth0[i] & uTruth1[i]);
}
else
{
for ( i = 0; i < nTruthWords; i++ )
pTruthRes[i] = uTruth0[i] & uTruth1[i];
}
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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