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/**CFile****************************************************************
FileName [aigSim.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [And-Inverter Graph package.]
Synopsis []
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: aigSim.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "aig.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Simulates all nodes using random simulation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_ManSimulateRandomFirst( Aig_Man_t * p )
{
Aig_SimInfo_t * pInfoPi, * pInfoAll;
assert( p->pInfo && p->pInfoTemp );
// create random PI info
pInfoPi = Aig_SimInfoAlloc( p->vPis->nSize, Aig_BitWordNum(p->pParam->nPatsRand), 0 );
Aig_SimInfoRandom( pInfoPi );
// simulate it though the circuit
pInfoAll = Aig_ManSimulateInfo( p, pInfoPi );
// detect classes
p->vClasses = Aig_ManDeriveClassesFirst( p, pInfoAll );
Aig_SimInfoFree( pInfoAll );
// save simulation info
p->pInfo = pInfoPi;
p->pInfoTemp = Aig_SimInfoAlloc( p->vNodes->nSize, Aig_BitWordNum(p->vPis->nSize), 1 );
}
/**Function*************************************************************
Synopsis [Simulates all nodes using the given simulation info.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Aig_SimInfo_t * Aig_ManSimulateInfo( Aig_Man_t * p, Aig_SimInfo_t * pInfoPi )
{
Aig_SimInfo_t * pInfoAll;
Aig_Node_t * pNode;
unsigned * pDataPi, * pData0, * pData1, * pDataAnd;
int i, k, fComp0, fComp1;
assert( !pInfoPi->Type ); // PI siminfo
// allocate sim info for all nodes
pInfoAll = Aig_SimInfoAlloc( p->vNodes->nSize, pInfoPi->nWords, 1 );
// set the constant sim info
pData1 = Aig_SimInfoForNode( pInfoAll, p->pConst1 );
for ( k = 0; k < pInfoPi->nWords; k++ )
pData1[k] = ~((unsigned)0);
// copy the PI siminfo
Vec_PtrForEachEntry( p->vPis, pNode, i )
{
pDataPi = Aig_SimInfoForPi( pInfoPi, i );
pDataAnd = Aig_SimInfoForNode( pInfoAll, pNode );
for ( k = 0; k < pInfoPi->nWords; k++ )
pDataAnd[k] = pDataPi[k];
}
// simulate the nodes
Vec_PtrForEachEntry( p->vNodes, pNode, i )
{
if ( !Aig_NodeIsAnd(pNode) )
continue;
pData0 = Aig_SimInfoForNode( pInfoAll, Aig_NodeFanin0(pNode) );
pData1 = Aig_SimInfoForNode( pInfoAll, Aig_NodeFanin1(pNode) );
pDataAnd = Aig_SimInfoForNode( pInfoAll, pNode );
fComp0 = Aig_NodeFaninC0(pNode);
fComp1 = Aig_NodeFaninC1(pNode);
if ( fComp0 && fComp1 )
for ( k = 0; k < pInfoPi->nWords; k++ )
pDataAnd[k] = ~pData0[k] & ~pData1[k];
else if ( fComp0 )
for ( k = 0; k < pInfoPi->nWords; k++ )
pDataAnd[k] = ~pData0[k] & pData1[k];
else if ( fComp1 )
for ( k = 0; k < pInfoPi->nWords; k++ )
pDataAnd[k] = pData0[k] & ~pData1[k];
else
for ( k = 0; k < pInfoPi->nWords; k++ )
pDataAnd[k] = pData0[k] & pData1[k];
}
return pInfoAll;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Aig_SimInfo_t * Aig_SimInfoAlloc( int nNodes, int nWords, int Type )
{
Aig_SimInfo_t * p;
p = ALLOC( Aig_SimInfo_t, 1 );
memset( p, 0, sizeof(Aig_SimInfo_t) );
p->Type = Type;
p->nNodes = nNodes;
p->nWords = nWords;
p->nPatsMax = nWords * sizeof(unsigned) * 8;
p->pData = ALLOC( unsigned, nNodes * nWords );
return p;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_SimInfoClean( Aig_SimInfo_t * p )
{
int i, Size = p->nNodes * p->nWords;
p->nPatsCur = 0;
for ( i = 0; i < Size; i++ )
p->pData[i] = 0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_SimInfoRandom( Aig_SimInfo_t * p )
{
int i, Size = p->nNodes * p->nWords;
unsigned * pData;
for ( i = 0; i < Size; i++ )
p->pData[i] = ((((unsigned)rand()) << 24) ^ (((unsigned)rand()) << 12) ^ ((unsigned)rand()));
// make sure the first bit of all nodes is 0
for ( i = 0; i < p->nNodes; i++ )
{
pData = p->pData + p->nWords * i;
*pData <<= 1;
}
p->nPatsCur = p->nPatsMax;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_SimInfoResize( Aig_SimInfo_t * p )
{
unsigned * pData;
int i, k;
assert( p->nPatsCur == p->nPatsMax );
pData = ALLOC( unsigned, 2 * p->nNodes * p->nWords );
for ( i = 0; i < p->nNodes; i++ )
{
for ( k = 0; k < p->nWords; k++ )
pData[2 * p->nWords * i + k] = p->pData[p->nWords * i + k];
for ( k = 0; k < p->nWords; k++ )
pData[2 * p->nWords * i + k + p->nWords] = 0;
}
p->nPatsMax *= 2;
p->nWords *= 2;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_SimInfoFree( Aig_SimInfo_t * p )
{
free( p->pData );
free( p );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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