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/**CFile****************************************************************
FileName [simSupp.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Network and node package.]
Synopsis [Simulation to determine functional support.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: simSupp.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "abc.h"
#include "sim.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
static int Sim_ComputeSuppRound( Sim_Man_t * p, bool fUseTargets );
static int Sim_ComputeSuppRoundNode( Sim_Man_t * p, int iNumCi, bool fUseTargets );
static void Sim_ComputeSuppSetTargets( Sim_Man_t * p );
static void Sim_UtilAssignFromFifo( Sim_Man_t * p );
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Compute functional supports of the primary outputs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Sim_Man_t * Sim_ComputeSupp( Abc_Ntk_t * pNtk )
{
Sim_Man_t * p;
int i, nSolved;
// srand( time(NULL) );
srand( 0xedfeedfe );
// start the simulation manager
p = Sim_ManStart( pNtk );
Sim_UtilComputeStrSupp( p );
// compute functional support using one round of random simulation
Sim_UtilAssignRandom( p );
Sim_ComputeSuppRound( p, 0 );
// set the support targets
Sim_ComputeSuppSetTargets( p );
printf( "Initial targets = %5d.\n", Vec_PtrSizeSize(p->vSuppTargs) );
if ( Vec_PtrSizeSize(p->vSuppTargs) == 0 )
goto exit;
// compute patterns using one round of random simulation
Sim_UtilAssignRandom( p );
nSolved = Sim_ComputeSuppRound( p, 1 );
printf( "First step targets = %5d. Solved = %5d.\n", Vec_PtrSizeSize(p->vSuppTargs), nSolved );
if ( Vec_PtrSizeSize(p->vSuppTargs) == 0 )
goto exit;
// simulate until saturation
for ( i = 0; i < 10; i++ )
{
// compute additional functional support
// Sim_UtilAssignFromFifo( p );
Sim_UtilAssignRandom( p );
nSolved = Sim_ComputeSuppRound( p, 1 );
printf( "Next step targets = %5d. Solved = %5d.\n", Vec_PtrSizeSize(p->vSuppTargs), nSolved );
if ( Vec_PtrSizeSize(p->vSuppTargs) == 0 )
goto exit;
}
exit:
// return p;
Sim_ManStop( p );
return NULL;
}
/**Function*************************************************************
Synopsis [Computes functional support using one round of simulation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Sim_ComputeSuppRound( Sim_Man_t * p, bool fUseTargets )
{
Vec_Int_t * vTargets;
Abc_Obj_t * pNode;
int i, Counter = 0;
// perform one round of random simulation
Sim_UtilSimulate( p, 0 );
// iterate through the CIs and detect COs that depend on them
Abc_NtkForEachCi( p->pNtk, pNode, i )
{
vTargets = p->vSuppTargs->pArray[i];
if ( fUseTargets && vTargets->nSize == 0 )
continue;
Counter += Sim_ComputeSuppRoundNode( p, i, fUseTargets );
}
return Counter;
}
/**Function*************************************************************
Synopsis [Computes functional support for one node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Sim_ComputeSuppRoundNode( Sim_Man_t * p, int iNumCi, bool fUseTargets )
{
Sim_Pat_t * pPat;
Vec_Int_t * vTargets;
Vec_Ptr_t * vNodesByLevel;
Abc_Obj_t * pNodeCi, * pNode;
int i, k, v, Output, LuckyPat, fType0, fType1;
int Counter = 0;
// collect nodes by level in the TFO of the CI
// (this procedure increments TravId of the collected nodes)
pNodeCi = Abc_NtkCi( p->pNtk, iNumCi );
vNodesByLevel = Abc_DfsLevelized( pNodeCi, 0 );
// complement the simulation info of the selected CI
Sim_UtilFlipSimInfo( p, pNodeCi );
// simulate the levelized structure of nodes
Vec_PtrForEachEntryByLevel( vNodesByLevel, pNode, i, k )
{
fType0 = Abc_NodeIsTravIdCurrent( Abc_ObjFanin0(pNode) );
fType1 = Abc_NodeIsTravIdCurrent( Abc_ObjFanin1(pNode) );
Sim_UtilSimulateNode( p, pNode, 1, fType0, fType1 );
}
// set the simulation info of the affected COs
if ( fUseTargets )
{
vTargets = p->vSuppTargs->pArray[iNumCi];
for ( i = vTargets->nSize - 1; i >= 0; i-- )
{
// get the target output
Output = vTargets->pArray[i];
// get the target node
pNode = Abc_NtkCo( p->pNtk, Output );
// the output should be in the cone
assert( Abc_NodeIsTravIdCurrent(pNode) );
// simulate the node
Sim_UtilSimulateNode( p, pNode, 1, 1, 1 );
// skip if the simulation info is equal
if ( Sim_UtilCompareSimInfo( p, pNode ) )
continue;
// otherwise, we solved a new target
Vec_IntRemove( vTargets, Output );
Counter++;
// make sure this variable is not yet detected
assert( !Sim_SuppFunHasVar(p, Output, iNumCi) );
// set this variable
Sim_SuppFunSetVar( p, Output, iNumCi );
// detect the differences in the simulation info
Sim_UtilInfoDetectDiffs( p->vSim0->pArray[pNode->Id], p->vSim1->pArray[pNode->Id], p->nSimWords, p->vDiffs );
// create new patterns
Vec_IntForEachEntry( p->vDiffs, LuckyPat, k )
{
// set the new pattern
pPat = Sim_ManPatAlloc( p );
pPat->Input = iNumCi;
pPat->Output = Output;
Abc_NtkForEachCi( p->pNtk, pNodeCi, v )
if ( Sim_SimInfoHasVar( p, pNodeCi, LuckyPat ) )
Sim_SetBit( pPat->pData, v );
Vec_PtrPush( p->vFifo, pPat );
break;
}
}
}
else
{
Abc_NtkForEachCo( p->pNtk, pNode, Output )
{
if ( !Abc_NodeIsTravIdCurrent( pNode ) )
continue;
Sim_UtilSimulateNode( p, pNode, 1, 1, 1 );
if ( !Sim_UtilCompareSimInfo( p, pNode ) )
{
if ( !Sim_SuppFunHasVar(p, Output, iNumCi) )
Counter++;
Sim_SuppFunSetVar( p, Output, iNumCi );
}
}
}
Vec_PtrFreeFree( vNodesByLevel );
return Counter;
}
/**Function*************************************************************
Synopsis [Sets the simulation targets.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Sim_ComputeSuppSetTargets( Sim_Man_t * p )
{
Abc_Obj_t * pNode;
unsigned * pSuppStr, * pSuppFun;
int i, k, Num;
Abc_NtkForEachCo( p->pNtk, pNode, i )
{
pSuppStr = p->vSuppStr->pArray[pNode->Id];
pSuppFun = p->vSuppFun->pArray[i];
// find vars in the structural support that are not in the functional support
Sim_UtilInfoDetectNews( pSuppFun, pSuppStr, p->nSuppWords, p->vDiffs );
Vec_IntForEachEntry( p->vDiffs, Num, k )
Vec_IntPush( p->vSuppTargs->pArray[Num], i );
}
}
/**Function*************************************************************
Synopsis [Sets the new patterns from fifo.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Sim_UtilAssignFromFifo( Sim_Man_t * p )
{
Sim_Pat_t * pPat;
int i;
for ( i = 0; i < p->nSimBits; i++ )
{
pPat = Vec_PtrPop( p->vFifo );
}
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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