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abc/src/aig/ssw/sswClass.c

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/**CFile****************************************************************
FileName [sswClass.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Inductive prover with constraints.]
Synopsis [Representation of candidate equivalence classes.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - September 1, 2008.]
Revision [$Id: sswClass.c,v 1.00 2008/09/01 00:00:00 alanmi Exp $]
***********************************************************************/
#include "sswInt.h"
/*
The candidate equivalence classes are stored as a vector of pointers
to the array of pointers to the nodes in each class.
The first node of the class is its representative node.
The representative has the smallest topological order among the class nodes.
The nodes inside each class are ordered according to their topological order.
The classes are ordered according to the topo order of their representatives.
*/
// internal representation of candidate equivalence classes
struct Ssw_Cla_t_
{
// class information
Aig_Man_t * pAig; // original AIG manager
Aig_Obj_t *** pId2Class; // non-const classes by ID of repr node
int * pClassSizes; // sizes of each equivalence class
// statistics
int nClasses; // the total number of non-const classes
int nCands1; // the total number of const candidates
int nLits; // the number of literals in all classes
// memory
Aig_Obj_t ** pMemClasses; // memory allocated for equivalence classes
Aig_Obj_t ** pMemClassesFree; // memory allocated for equivalence classes to be used
// temporary data
Vec_Ptr_t * vClassOld; // old equivalence class after splitting
Vec_Ptr_t * vClassNew; // new equivalence class(es) after splitting
Vec_Ptr_t * vRefined; // the nodes refined since the last iteration
// procedures used for class refinement
void * pManData;
unsigned (*pFuncNodeHash) (void *,Aig_Obj_t *); // returns hash key of the node
int (*pFuncNodeIsConst) (void *,Aig_Obj_t *); // returns 1 if the node is a constant
int (*pFuncNodesAreEqual) (void *,Aig_Obj_t *, Aig_Obj_t *); // returns 1 if nodes are equal up to a complement
};
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
static inline Aig_Obj_t * Ssw_ObjNext( Aig_Obj_t ** ppNexts, Aig_Obj_t * pObj ) { return ppNexts[pObj->Id]; }
static inline void Ssw_ObjSetNext( Aig_Obj_t ** ppNexts, Aig_Obj_t * pObj, Aig_Obj_t * pNext ) { ppNexts[pObj->Id] = pNext; }
// iterator through the equivalence classes
#define Ssw_ManForEachClass( p, ppClass, i ) \
for ( i = 0; i < Aig_ManObjNumMax(p->pAig); i++ ) \
if ( ((ppClass) = p->pId2Class[i]) == NULL ) {} else
// iterator through the nodes in one class
#define Ssw_ClassForEachNode( p, pRepr, pNode, i ) \
for ( i = 0; i < p->pClassSizes[pRepr->Id]; i++ ) \
if ( ((pNode) = p->pId2Class[pRepr->Id][i]) == NULL ) {} else
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Creates one equivalence class.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Ssw_ObjAddClass( Ssw_Cla_t * p, Aig_Obj_t * pRepr, Aig_Obj_t ** pClass, int nSize )
{
assert( p->pId2Class[pRepr->Id] == NULL );
assert( pClass[0] == pRepr );
p->pId2Class[pRepr->Id] = pClass;
assert( p->pClassSizes[pRepr->Id] == 0 );
assert( nSize > 1 );
p->pClassSizes[pRepr->Id] = nSize;
p->nClasses++;
p->nLits += nSize - 1;
}
/**Function*************************************************************
Synopsis [Removes one equivalence class.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline Aig_Obj_t ** Ssw_ObjRemoveClass( Ssw_Cla_t * p, Aig_Obj_t * pRepr )
{
Aig_Obj_t ** pClass = p->pId2Class[pRepr->Id];
int nSize;
assert( pClass != NULL );
p->pId2Class[pRepr->Id] = NULL;
nSize = p->pClassSizes[pRepr->Id];
assert( nSize > 1 );
p->nClasses--;
p->nLits -= nSize - 1;
p->pClassSizes[pRepr->Id] = 0;
return pClass;
}
/**Function*************************************************************
Synopsis [Starts representation of equivalence classes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Ssw_Cla_t * Ssw_ClassesStart( Aig_Man_t * pAig )
{
Ssw_Cla_t * p;
p = ALLOC( Ssw_Cla_t, 1 );
memset( p, 0, sizeof(Ssw_Cla_t) );
p->pAig = pAig;
p->pId2Class = CALLOC( Aig_Obj_t **, Aig_ManObjNumMax(pAig) );
p->pClassSizes = CALLOC( int, Aig_ManObjNumMax(pAig) );
p->vClassOld = Vec_PtrAlloc( 100 );
p->vClassNew = Vec_PtrAlloc( 100 );
p->vRefined = Vec_PtrAlloc( 1000 );
assert( pAig->pReprs == NULL );
Aig_ManReprStart( pAig, Aig_ManObjNumMax(pAig) );
return p;
}
/**Function*************************************************************
Synopsis [Starts representation of equivalence classes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_ClassesSetData( Ssw_Cla_t * p, void * pManData,
unsigned (*pFuncNodeHash)(void *,Aig_Obj_t *), // returns hash key of the node
int (*pFuncNodeIsConst)(void *,Aig_Obj_t *), // returns 1 if the node is a constant
int (*pFuncNodesAreEqual)(void *,Aig_Obj_t *, Aig_Obj_t *) ) // returns 1 if nodes are equal up to a complement
{
p->pManData = pManData;
p->pFuncNodeHash = pFuncNodeHash;
p->pFuncNodeIsConst = pFuncNodeIsConst;
p->pFuncNodesAreEqual = pFuncNodesAreEqual;
}
/**Function*************************************************************
Synopsis [Stop representation of equivalence classes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_ClassesStop( Ssw_Cla_t * p )
{
if ( p->vClassNew ) Vec_PtrFree( p->vClassNew );
if ( p->vClassOld ) Vec_PtrFree( p->vClassOld );
Vec_PtrFree( p->vRefined );
FREE( p->pId2Class );
FREE( p->pClassSizes );
FREE( p->pMemClasses );
free( p );
}
/**Function*************************************************************
Synopsis [Stop representation of equivalence classes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Man_t * Ssw_ClassesReadAig( Ssw_Cla_t * p )
{
return p->pAig;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Ptr_t * Ssw_ClassesGetRefined( Ssw_Cla_t * p )
{
return p->vRefined;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_ClassesClearRefined( Ssw_Cla_t * p )
{
Vec_PtrClear( p->vRefined );
}
/**Function*************************************************************
Synopsis [Stop representation of equivalence classes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_ClassesCand1Num( Ssw_Cla_t * p )
{
return p->nCands1;
}
/**Function*************************************************************
Synopsis [Stop representation of equivalence classes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_ClassesClassNum( Ssw_Cla_t * p )
{
return p->nClasses;
}
/**Function*************************************************************
Synopsis [Stop representation of equivalence classes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_ClassesLitNum( Ssw_Cla_t * p )
{
return p->nLits;
}
/**Function*************************************************************
Synopsis [Stop representation of equivalence classes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Obj_t ** Ssw_ClassesReadClass( Ssw_Cla_t * p, Aig_Obj_t * pRepr, int * pnSize )
{
if ( p->pId2Class[pRepr->Id] == NULL )
return NULL;
assert( p->pId2Class[pRepr->Id] != NULL );
assert( p->pClassSizes[pRepr->Id] > 1 );
*pnSize = p->pClassSizes[pRepr->Id];
return p->pId2Class[pRepr->Id];
}
/**Function*************************************************************
Synopsis [Stop representation of equivalence classes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_ClassesCollectClass( Ssw_Cla_t * p, Aig_Obj_t * pRepr, Vec_Ptr_t * vClass )
{
int i;
Vec_PtrClear( vClass );
if ( p->pId2Class[pRepr->Id] == NULL )
return;
assert( p->pClassSizes[pRepr->Id] > 1 );
for ( i = 1; i < p->pClassSizes[pRepr->Id]; i++ )
Vec_PtrPush( vClass, p->pId2Class[pRepr->Id][i] );
}
/**Function*************************************************************
Synopsis [Checks candidate equivalence classes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_ClassesCheck( Ssw_Cla_t * p )
{
Aig_Obj_t * pObj, * pPrev, ** ppClass;
int i, k, nLits, nClasses, nCands1;
nClasses = nLits = 0;
Ssw_ManForEachClass( p, ppClass, k )
{
pPrev = NULL;
assert( p->pClassSizes[ppClass[0]->Id] >= 2 );
Ssw_ClassForEachNode( p, ppClass[0], pObj, i )
{
if ( i == 0 )
assert( Aig_ObjRepr(p->pAig, pObj) == NULL );
else
{
assert( Aig_ObjRepr(p->pAig, pObj) == ppClass[0] );
assert( pPrev->Id < pObj->Id );
nLits++;
}
pPrev = pObj;
}
nClasses++;
}
nCands1 = 0;
Aig_ManForEachObj( p->pAig, pObj, i )
nCands1 += Ssw_ObjIsConst1Cand( p->pAig, pObj );
assert( p->nLits == nLits );
assert( p->nCands1 == nCands1 );
assert( p->nClasses == nClasses );
}
/**Function*************************************************************
Synopsis [Prints simulation classes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_ClassesPrintOne( Ssw_Cla_t * p, Aig_Obj_t * pRepr )
{
Aig_Obj_t * pObj;
int i;
printf( "{ " );
Ssw_ClassForEachNode( p, pRepr, pObj, i )
printf( "%d(%d,%d) ", pObj->Id, pObj->Level, Aig_SupportSize(p->pAig,pObj) );
printf( "}\n" );
}
/**Function*************************************************************
Synopsis [Prints simulation classes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_ClassesPrint( Ssw_Cla_t * p, int fVeryVerbose )
{
Aig_Obj_t ** ppClass;
Aig_Obj_t * pObj;
int i;
printf( "Equivalence classes: Const1 = %5d. Class = %5d. Lit = %5d.\n",
p->nCands1, p->nClasses, p->nCands1+p->nLits );
if ( !fVeryVerbose )
return;
printf( "Constants { " );
Aig_ManForEachObj( p->pAig, pObj, i )
if ( Ssw_ObjIsConst1Cand( p->pAig, pObj ) )
printf( "%d(%d,%d) ", pObj->Id, pObj->Level, Aig_SupportSize(p->pAig,pObj) );
printf( "}\n" );
Ssw_ManForEachClass( p, ppClass, i )
{
printf( "%3d (%3d) : ", i, p->pClassSizes[i] );
Ssw_ClassesPrintOne( p, ppClass[0] );
}
printf( "\n" );
}
/**Function*************************************************************
Synopsis [Prints simulation classes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_ClassesRemoveNode( Ssw_Cla_t * p, Aig_Obj_t * pObj )
{
Aig_Obj_t * pRepr, * pTemp;
assert( p->pClassSizes[pObj->Id] == 0 );
assert( p->pId2Class[pObj->Id] == NULL );
pRepr = Aig_ObjRepr( p->pAig, pObj );
assert( pRepr != NULL );
// Vec_PtrPush( p->vRefined, pObj );
if ( Ssw_ObjIsConst1Cand( p->pAig, pObj ) )
{
assert( p->pClassSizes[pRepr->Id] == 0 );
assert( p->pId2Class[pRepr->Id] == NULL );
Aig_ObjSetRepr( p->pAig, pObj, NULL );
p->nCands1--;
return;
}
// Vec_PtrPush( p->vRefined, pRepr );
Aig_ObjSetRepr( p->pAig, pObj, NULL );
assert( p->pId2Class[pRepr->Id][0] == pRepr );
assert( p->pClassSizes[pRepr->Id] >= 2 );
if ( p->pClassSizes[pRepr->Id] == 2 )
{
p->pId2Class[pRepr->Id] = NULL;
p->nClasses--;
p->pClassSizes[pRepr->Id] = 0;
p->nLits--;
}
else
{
int i, k = 0;
// remove the entry from the class
Ssw_ClassForEachNode( p, pRepr, pTemp, i )
if ( pTemp != pObj )
p->pId2Class[pRepr->Id][k++] = pTemp;
assert( k + 1 == p->pClassSizes[pRepr->Id] );
// reduce the class
p->pClassSizes[pRepr->Id]--;
p->nLits--;
}
}
/**Function*************************************************************
Synopsis [Creates initial simulation classes.]
Description [Assumes that simulation info is assigned.]
SideEffects []
SeeAlso []
***********************************************************************/
Ssw_Cla_t * Ssw_ClassesPrepare( Aig_Man_t * pAig, int fLatchCorr, int nMaxLevs, int fVerbose )
{
// int nFrames = 4;
// int nWords = 1;
// int nIters = 16;
// int nFrames = 32;
// int nWords = 4;
// int nIters = 0;
int nFrames = 4;
int nWords = 2;
int nIters = 16;
Ssw_Cla_t * p;
Ssw_Sml_t * pSml;
Aig_Obj_t ** ppTable, ** ppNexts, ** ppClassNew;
Aig_Obj_t * pObj, * pTemp, * pRepr;
int i, k, nTableSize, nNodes, iEntry, nEntries, nEntries2, RetValue;
int clk;
// start the classes
p = Ssw_ClassesStart( pAig );
// perform sequential simulation
clk = clock();
pSml = Ssw_SmlSimulateSeq( pAig, 0, nFrames, nWords );
if ( fVerbose )
{
printf( "Allocated %.2f Mb for simulation information.\n",
1.0*(sizeof(unsigned) * Aig_ManObjNumMax(pAig) * nFrames * nWords)/(1<<20) );
printf( "Initial simulation of %d frames with %d words. ", nFrames, nWords );
PRT( "Time", clock() - clk );
}
// set comparison procedures
clk = clock();
Ssw_ClassesSetData( p, pSml, Ssw_SmlObjHashWord, Ssw_SmlObjIsConstWord, Ssw_SmlObjsAreEqualWord );
// allocate the hash table hashing simulation info into nodes
nTableSize = Aig_PrimeCudd( Aig_ManObjNumMax(p->pAig)/4 );
ppTable = CALLOC( Aig_Obj_t *, nTableSize );
ppNexts = CALLOC( Aig_Obj_t *, Aig_ManObjNumMax(p->pAig) );
// add all the nodes to the hash table
nEntries = 0;
Aig_ManForEachObj( p->pAig, pObj, i )
{
if ( fLatchCorr )
{
if ( !Saig_ObjIsLo(p->pAig, pObj) )
continue;
}
else
{
if ( !Aig_ObjIsNode(pObj) && !Aig_ObjIsPi(pObj) )
continue;
// skip the node with more that the given number of levels
if ( nMaxLevs && (int)pObj->Level > nMaxLevs )
continue;
}
// check if the node belongs to the class of constant 1
if ( p->pFuncNodeIsConst( p->pManData, pObj ) )
{
Ssw_ObjSetConst1Cand( p->pAig, pObj );
p->nCands1++;
continue;
}
// hash the node by its simulation info
iEntry = p->pFuncNodeHash( p->pManData, pObj ) % nTableSize;
// add the node to the class
if ( ppTable[iEntry] == NULL )
ppTable[iEntry] = pObj;
else
{
// set the representative of this node
pRepr = ppTable[iEntry];
Aig_ObjSetRepr( p->pAig, pObj, pRepr );
// add node to the table
if ( Ssw_ObjNext( ppNexts, pRepr ) == NULL )
{ // this will be the second entry
p->pClassSizes[pRepr->Id]++;
nEntries++;
}
// add the entry to the list
Ssw_ObjSetNext( ppNexts, pObj, Ssw_ObjNext( ppNexts, pRepr ) );
Ssw_ObjSetNext( ppNexts, pRepr, pObj );
p->pClassSizes[pRepr->Id]++;
nEntries++;
}
}
// allocate room for classes
p->pMemClasses = ALLOC( Aig_Obj_t *, nEntries + p->nCands1 );
p->pMemClassesFree = p->pMemClasses + nEntries;
// copy the entries into storage in the topological order
nEntries2 = 0;
Aig_ManForEachObj( p->pAig, pObj, i )
{
if ( !Aig_ObjIsNode(pObj) && !Aig_ObjIsPi(pObj) )
continue;
nNodes = p->pClassSizes[pObj->Id];
// skip the nodes that are not representatives of non-trivial classes
if ( nNodes == 0 )
continue;
assert( nNodes > 1 );
// add the nodes to the class in the topological order
ppClassNew = p->pMemClasses + nEntries2;
ppClassNew[0] = pObj;
for ( pTemp = Ssw_ObjNext(ppNexts, pObj), k = 1; pTemp;
pTemp = Ssw_ObjNext(ppNexts, pTemp), k++ )
{
ppClassNew[nNodes-k] = pTemp;
}
// add the class of nodes
p->pClassSizes[pObj->Id] = 0;
Ssw_ObjAddClass( p, pObj, ppClassNew, nNodes );
// increment the number of entries
nEntries2 += nNodes;
}
assert( nEntries == nEntries2 );
free( ppTable );
free( ppNexts );
// now it is time to refine the classes
Ssw_ClassesRefine( p, 1 );
if ( fVerbose )
{
printf( "Collecting candidate equivalence classes. " );
PRT( "Time", clock() - clk );
}
clk = clock();
// perform iterative refinement using simulation
k = 0;
for ( i = 1; i < nIters; i++ )
{
Ssw_SmlResimulateSeq( pSml );
// simulate internal nodes
Ssw_SmlSimulateOne( pSml );
// check equivalence classes
RetValue = Ssw_ClassesRefineConst1( p, 1 );
RetValue += Ssw_ClassesRefine( p, 1 );
k++;
if ( RetValue == 0 )
break;
}
Ssw_ClassesCheck( p );
Ssw_SmlStop( pSml );
if ( fVerbose )
{
printf( "Simulation of %d frames with %d words (%2d rounds). ",
nFrames, nWords, k );
PRT( "Time", clock() - clk );
}
// Ssw_ClassesPrint( p, 0 );
return p;
}
/**Function*************************************************************
Synopsis [Creates initial simulation classes.]
Description [Assumes that simulation info is assigned.]
SideEffects []
SeeAlso []
***********************************************************************/
Ssw_Cla_t * Ssw_ClassesPrepareSimple( Aig_Man_t * pAig, int fLatchCorr, int nMaxLevs )
{
Ssw_Cla_t * p;
Aig_Obj_t * pObj;
int i;
// start the classes
p = Ssw_ClassesStart( pAig );
// go through the nodes
p->nCands1 = 0;
Aig_ManForEachObj( pAig, pObj, i )
{
if ( fLatchCorr )
{
if ( !Saig_ObjIsLo(pAig, pObj) )
continue;
}
else
{
if ( !Aig_ObjIsNode(pObj) && !Saig_ObjIsLo(pAig, pObj) )
continue;
// skip the node with more that the given number of levels
if ( nMaxLevs && (int)pObj->Level > nMaxLevs )
continue;
}
Ssw_ObjSetConst1Cand( pAig, pObj );
p->nCands1++;
}
// allocate room for classes
p->pMemClassesFree = p->pMemClasses = ALLOC( Aig_Obj_t *, p->nCands1 );
// Ssw_ClassesPrint( p, 0 );
return p;
}
/**Function*************************************************************
Synopsis [Creates initial simulation classes.]
Description [Assumes that simulation info is assigned.]
SideEffects []
SeeAlso []
***********************************************************************/
Ssw_Cla_t * Ssw_ClassesPrepareTargets( Aig_Man_t * pAig )
{
Ssw_Cla_t * p;
Aig_Obj_t * pObj;
int i;
// start the classes
p = Ssw_ClassesStart( pAig );
// go through the nodes
p->nCands1 = 0;
Saig_ManForEachPo( pAig, pObj, i )
{
Ssw_ObjSetConst1Cand( pAig, Aig_ObjFanin0(pObj) );
p->nCands1++;
}
// allocate room for classes
p->pMemClassesFree = p->pMemClasses = ALLOC( Aig_Obj_t *, p->nCands1 );
// Ssw_ClassesPrint( p, 0 );
return p;
}
/**Function*************************************************************
Synopsis [Creates classes from the temporary representation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Ssw_Cla_t * Ssw_ClassesPreparePairs( Aig_Man_t * pAig, Vec_Int_t ** pvClasses )
{
Ssw_Cla_t * p;
Aig_Obj_t ** ppClassNew;
Aig_Obj_t * pObj, * pRepr, * pPrev;
int i, k, nTotalObjs, nEntries, Entry;
// start the classes
p = Ssw_ClassesStart( pAig );
// count the number of entries in the classes
nTotalObjs = 0;
for ( i = 0; i < Aig_ManObjNumMax(pAig); i++ )
nTotalObjs += pvClasses[i] ? Vec_IntSize(pvClasses[i]) : 0;
// allocate memory for classes
p->pMemClasses = ALLOC( Aig_Obj_t *, nTotalObjs );
// create constant-1 class
if ( pvClasses[0] )
Vec_IntForEachEntry( pvClasses[0], Entry, i )
{
assert( (i == 0) == (Entry == 0) );
if ( i == 0 )
continue;
pObj = Aig_ManObj( pAig, Entry );
Ssw_ObjSetConst1Cand( pAig, pObj );
p->nCands1++;
}
// create classes
nEntries = 0;
for ( i = 1; i < Aig_ManObjNumMax(pAig); i++ )
{
if ( pvClasses[i] == NULL )
continue;
// get room for storing the class
ppClassNew = p->pMemClasses + nEntries;
nEntries += Vec_IntSize( pvClasses[i] );
// store the nodes of the class
pPrev = pRepr = Aig_ManObj( pAig, Vec_IntEntry(pvClasses[i],0) );
ppClassNew[0] = pRepr;
Vec_IntForEachEntryStart( pvClasses[i], Entry, k, 1 )
{
pObj = Aig_ManObj( pAig, Entry );
assert( pPrev->Id < pObj->Id );
pPrev = pObj;
ppClassNew[k] = pObj;
Aig_ObjSetRepr( pAig, pObj, pRepr );
}
// create new class
Ssw_ObjAddClass( p, pRepr, ppClassNew, Vec_IntSize(pvClasses[i]) );
}
// prepare room for new classes
p->pMemClassesFree = p->pMemClasses + nEntries;
Ssw_ClassesCheck( p );
// Ssw_ClassesPrint( p, 0 );
return p;
}
/**Function*************************************************************
Synopsis [Creates classes from the temporary representation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Ssw_Cla_t * Ssw_ClassesFromIslands( Aig_Man_t * pMiter, Vec_Int_t * vPairs )
{
Ssw_Cla_t * p;
Aig_Obj_t ** ppClassNew;
Aig_Obj_t * pObj, * pRepr;
int i;
// start the classes
p = Ssw_ClassesStart( pMiter );
// allocate memory for classes
p->pMemClasses = ALLOC( Aig_Obj_t *, Vec_IntSize(vPairs) );
// create classes
for ( i = 0; i < Vec_IntSize(vPairs); i += 2 )
{
pRepr = Aig_ManObj( pMiter, Vec_IntEntry(vPairs, i) );
pObj = Aig_ManObj( pMiter, Vec_IntEntry(vPairs, i+1) );
assert( Aig_ObjId(pRepr) < Aig_ObjId(pObj) );
Aig_ObjSetRepr( pMiter, pObj, pRepr );
// get room for storing the class
ppClassNew = p->pMemClasses + i;
ppClassNew[0] = pRepr;
ppClassNew[1] = pObj;
// create new class
Ssw_ObjAddClass( p, pRepr, ppClassNew, 2 );
}
// prepare room for new classes
p->pMemClassesFree = NULL;
Ssw_ClassesCheck( p );
// Ssw_ClassesPrint( p, 0 );
return p;
}
/**Function*************************************************************
Synopsis [Iteratively refines the classes after simulation.]
Description [Returns the number of refinements performed.]
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_ClassesRefineOneClass( Ssw_Cla_t * p, Aig_Obj_t * pReprOld, int fRecursive )
{
Aig_Obj_t ** pClassOld, ** pClassNew;
Aig_Obj_t * pObj, * pReprNew;
int i;
// split the class
Vec_PtrClear( p->vClassOld );
Vec_PtrClear( p->vClassNew );
Ssw_ClassForEachNode( p, pReprOld, pObj, i )
if ( p->pFuncNodesAreEqual(p->pManData, pReprOld, pObj) )
Vec_PtrPush( p->vClassOld, pObj );
else
Vec_PtrPush( p->vClassNew, pObj );
// check if splitting happened
if ( Vec_PtrSize(p->vClassNew) == 0 )
return 0;
// remember that this class is refined
// Ssw_ClassForEachNode( p, pReprOld, pObj, i )
// Vec_PtrPush( p->vRefined, pObj );
// get the new representative
pReprNew = Vec_PtrEntry( p->vClassNew, 0 );
assert( Vec_PtrSize(p->vClassOld) > 0 );
assert( Vec_PtrSize(p->vClassNew) > 0 );
// create old class
pClassOld = Ssw_ObjRemoveClass( p, pReprOld );
Vec_PtrForEachEntry( p->vClassOld, pObj, i )
{
pClassOld[i] = pObj;
Aig_ObjSetRepr( p->pAig, pObj, i? pReprOld : NULL );
}
// create new class
pClassNew = pClassOld + i;
Vec_PtrForEachEntry( p->vClassNew, pObj, i )
{
pClassNew[i] = pObj;
Aig_ObjSetRepr( p->pAig, pObj, i? pReprNew : NULL );
}
// put classes back
if ( Vec_PtrSize(p->vClassOld) > 1 )
Ssw_ObjAddClass( p, pReprOld, pClassOld, Vec_PtrSize(p->vClassOld) );
if ( Vec_PtrSize(p->vClassNew) > 1 )
Ssw_ObjAddClass( p, pReprNew, pClassNew, Vec_PtrSize(p->vClassNew) );
// check if the class should be recursively refined
if ( fRecursive && Vec_PtrSize(p->vClassNew) > 1 )
return 1 + Ssw_ClassesRefineOneClass( p, pReprNew, 1 );
return 1;
}
/**Function*************************************************************
Synopsis [Refines the classes after simulation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_ClassesRefine( Ssw_Cla_t * p, int fRecursive )
{
Aig_Obj_t ** ppClass;
int i, nRefis = 0;
Ssw_ManForEachClass( p, ppClass, i )
nRefis += Ssw_ClassesRefineOneClass( p, ppClass[0], fRecursive );
return nRefis;
}
/**Function*************************************************************
Synopsis [Refine the group of constant 1 nodes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_ClassesRefineConst1Group( Ssw_Cla_t * p, Vec_Ptr_t * vRoots, int fRecursive )
{
Aig_Obj_t * pObj, * pReprNew, ** ppClassNew;
int i;
if ( Vec_PtrSize(vRoots) == 0 )
return 0;
// collect the nodes to be refined
Vec_PtrClear( p->vClassNew );
Vec_PtrForEachEntry( vRoots, pObj, i )
if ( !p->pFuncNodeIsConst( p->pManData, pObj ) )
Vec_PtrPush( p->vClassNew, pObj );
// check if there is a new class
if ( Vec_PtrSize(p->vClassNew) == 0 )
return 0;
p->nCands1 -= Vec_PtrSize(p->vClassNew);
pReprNew = Vec_PtrEntry( p->vClassNew, 0 );
Aig_ObjSetRepr( p->pAig, pReprNew, NULL );
if ( Vec_PtrSize(p->vClassNew) == 1 )
return 1;
// create a new class composed of these nodes
ppClassNew = p->pMemClassesFree;
p->pMemClassesFree += Vec_PtrSize(p->vClassNew);
Vec_PtrForEachEntry( p->vClassNew, pObj, i )
{
ppClassNew[i] = pObj;
Aig_ObjSetRepr( p->pAig, pObj, i? pReprNew : NULL );
}
Ssw_ObjAddClass( p, pReprNew, ppClassNew, Vec_PtrSize(p->vClassNew) );
// refine them recursively
if ( fRecursive )
return 1 + Ssw_ClassesRefineOneClass( p, pReprNew, 1 );
return 1;
}
/**Function*************************************************************
Synopsis [Refine the group of constant 1 nodes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_ClassesRefineConst1( Ssw_Cla_t * p, int fRecursive )
{
Aig_Obj_t * pObj, * pReprNew, ** ppClassNew;
int i;
// collect the nodes to be refined
Vec_PtrClear( p->vClassNew );
for ( i = 0; i < Vec_PtrSize(p->pAig->vObjs); i++ )
if ( p->pAig->pReprs[i] == Aig_ManConst1(p->pAig) )
{
pObj = Aig_ManObj( p->pAig, i );
if ( !p->pFuncNodeIsConst( p->pManData, pObj ) )
{
Vec_PtrPush( p->vClassNew, pObj );
// Vec_PtrPush( p->vRefined, pObj );
}
}
// check if there is a new class
if ( Vec_PtrSize(p->vClassNew) == 0 )
return 0;
p->nCands1 -= Vec_PtrSize(p->vClassNew);
pReprNew = Vec_PtrEntry( p->vClassNew, 0 );
Aig_ObjSetRepr( p->pAig, pReprNew, NULL );
if ( Vec_PtrSize(p->vClassNew) == 1 )
return 1;
// create a new class composed of these nodes
ppClassNew = p->pMemClassesFree;
p->pMemClassesFree += Vec_PtrSize(p->vClassNew);
Vec_PtrForEachEntry( p->vClassNew, pObj, i )
{
ppClassNew[i] = pObj;
Aig_ObjSetRepr( p->pAig, pObj, i? pReprNew : NULL );
}
Ssw_ObjAddClass( p, pReprNew, ppClassNew, Vec_PtrSize(p->vClassNew) );
// refine them recursively
if ( fRecursive )
return 1 + Ssw_ClassesRefineOneClass( p, pReprNew, 1 );
return 1;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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