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/**CFile****************************************************************
FileName [fraigEngine.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: fraigEngine.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 for the first time.]
Description [Assigns the original simulation info and the storage for the
future simulation info.]
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_EngineSimulateRandomFirst( Aig_Man_t * p )
{
Aig_SimInfo_t * pInfoPi, * pInfoAll;
assert( !p->pInfo && !p->pInfoTemp );
// create random PI info
pInfoPi = Aig_SimInfoAlloc( Aig_ManPiNum(p), p->pParam->nPatsRand, 0 );
Aig_SimInfoRandom( pInfoPi );
// allocate sim info for all nodes
pInfoAll = Aig_SimInfoAlloc( Aig_ManNodeNum(p), p->pParam->nPatsRand, 1 );
// simulate though the circuit
Aig_ManSimulateInfo( p, pInfoPi, pInfoAll );
// detect classes
p->vClasses = Aig_ManDeriveClassesFirst( p, pInfoAll );
Aig_SimInfoFree( pInfoAll );
// save simulation info
p->pInfo = pInfoPi;
p->pInfoPi = Aig_SimInfoAlloc( Aig_ManPiNum(p), Aig_ManPiNum(p)+1, 0 );
p->pInfoTemp = Aig_SimInfoAlloc( Aig_ManNodeNum(p), Aig_ManPiNum(p)+1, 1 );
p->pPatMask = Aig_PatternAlloc( Aig_ManPiNum(p)+1 );
}
/**Function*************************************************************
Synopsis [Starts the simulation engine for the first time.]
Description [Tries several random patterns and their distance-1
minterms hoping to get simulation started.]
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_EngineSimulateFirst( Aig_Man_t * p )
{
Aig_Pattern_t * pPat;
int i, Counter;
// simulate the pattern of all zeros
pPat = Aig_PatternAlloc( Aig_ManPiNum(p) );
Aig_PatternClean( pPat );
Vec_PtrPush( p->vPats, pPat );
if ( !Aig_EngineSimulate( p ) )
return;
// simulate the pattern of all ones
pPat = Aig_PatternAlloc( Aig_ManPiNum(p) );
Aig_PatternFill( pPat );
Vec_PtrPush( p->vPats, pPat );
if ( !Aig_EngineSimulate( p ) )
return;
// simulate random until the number of new patterns is reasonable
do {
// generate random PI siminfo
Aig_SimInfoRandom( p->pInfoPi );
// simulate this info
Aig_ManSimulateInfo( p, p->pInfoPi, p->pInfoTemp );
// split the classes and collect the new patterns
if ( Aig_ManUpdateClasses( p, p->pInfoTemp, p->vClasses, p->pPatMask ) )
Aig_ManCollectPatterns( p, p->pInfoTemp, p->pPatMask, NULL );
if ( Vec_VecSize(p->vClasses) == 0 )
return;
// count the number of useful patterns
Counter = Aig_PatternCount(p->pPatMask);
}
while ( Counter > p->nPatsMax/2 );
// perform targetted simulation
for ( i = 0; i < 3; i++ )
{
assert( Vec_PtrSize(p->vPats) == 0 );
// generate random PI siminfo
Aig_SimInfoRandom( p->pInfoPi );
// simulate this info
Aig_ManSimulateInfo( p, p->pInfoPi, p->pInfoTemp );
// split the classes and collect the new patterns
if ( Aig_ManUpdateClasses( p, p->pInfoTemp, p->vClasses, p->pPatMask ) )
Aig_ManCollectPatterns( p, p->pInfoTemp, p->pPatMask, p->vPats );
if ( Vec_VecSize(p->vClasses) == 0 )
return;
// simulate the remaining patters
if ( Vec_PtrSize(p->vPats) > 0 )
if ( !Aig_EngineSimulate( p ) )
return;
}
}
/**Function*************************************************************
Synopsis [Implements intelligent simulation engine.]
Description [Assumes that the good simulation patterns have been
assigned (p->vPats). Simulates until all of them are gone. Returns 1
if some classes are left. Returns 0 if there is no more classes.]
SideEffects []
SeeAlso []
***********************************************************************/
int Aig_EngineSimulate( Aig_Man_t * p )
{
Aig_Pattern_t * pPat;
if ( Vec_VecSize(p->vClasses) == 0 )
return 0;
assert( Vec_PtrSize(p->vPats) > 0 );
// process patterns
while ( Vec_PtrSize(p->vPats) > 0 && Vec_VecSize(p->vClasses) > 0 )
{
// get the pattern and create new siminfo
pPat = Vec_PtrPop(p->vPats);
assert( pPat->nBits == Aig_ManPiNum(p) );
// create the new siminfo
Aig_SimInfoFromPattern( p->pInfoPi, pPat );
// free the pattern
Aig_PatternFree( pPat );
// simulate this info
Aig_ManSimulateInfo( p, p->pInfoPi, p->pInfoTemp );
// split the classes and collect the new patterns
if ( Aig_ManUpdateClasses( p, p->pInfoTemp, p->vClasses, p->pPatMask ) )
Aig_ManCollectPatterns( p, p->pInfoTemp, p->pPatMask, p->vPats );
}
return Vec_VecSize(p->vClasses) > 0;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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