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/**CFile****************************************************************
FileName [aigMan.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [AIG package.]
Synopsis [AIG manager.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - April 28, 2007.]
Revision [$Id: aigMan.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $]
***********************************************************************/
#include "aig.h"
#include "tim.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Starts the AIG manager.]
Description [The argument of this procedure is a soft limit on the
the number of nodes, or 0 if the limit is unknown.]
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Man_t * Aig_ManStart( int nNodesMax )
{
Aig_Man_t * p;
if ( nNodesMax <= 0 )
nNodesMax = 10007;
// start the manager
p = ALLOC( Aig_Man_t, 1 );
memset( p, 0, sizeof(Aig_Man_t) );
// perform initializations
p->nTravIds = 1;
p->fCatchExor = 0;
// allocate arrays for nodes
p->vPis = Vec_PtrAlloc( 100 );
p->vPos = Vec_PtrAlloc( 100 );
p->vObjs = Vec_PtrAlloc( 1000 );
p->vBufs = Vec_PtrAlloc( 100 );
// prepare the internal memory manager
p->pMemObjs = Aig_MmFixedStart( sizeof(Aig_Obj_t), nNodesMax );
// create the constant node
p->pConst1 = Aig_ManFetchMemory( p );
p->pConst1->Type = AIG_OBJ_CONST1;
p->pConst1->fPhase = 1;
p->nObjs[AIG_OBJ_CONST1]++;
// start the table
p->nTableSize = Aig_PrimeCudd( nNodesMax );
p->pTable = ALLOC( Aig_Obj_t *, p->nTableSize );
memset( p->pTable, 0, sizeof(Aig_Obj_t *) * p->nTableSize );
return p;
}
/**Function*************************************************************
Synopsis [Duplicates the AIG manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Man_t * Aig_ManStartFrom( Aig_Man_t * p )
{
Aig_Man_t * pNew;
Aig_Obj_t * pObj, * pObjNew;
int i;
// create the new manager
pNew = Aig_ManStart( Aig_ManObjNumMax(p) );
pNew->pName = Aig_UtilStrsav( p->pName );
pNew->pSpec = Aig_UtilStrsav( p->pSpec );
// create the PIs
Aig_ManConst1(p)->pData = Aig_ManConst1(pNew);
Aig_ManForEachPi( p, pObj, i )
{
pObjNew = Aig_ObjCreatePi( pNew );
pObjNew->Level = pObj->Level;
pObjNew->pHaig = pObj->pHaig;
pObj->pData = pObjNew;
}
return pNew;
}
/**Function*************************************************************
Synopsis [Duplicates the AIG manager recursively.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Obj_t * Aig_ManDup_rec( Aig_Man_t * pNew, Aig_Man_t * p, Aig_Obj_t * pObj )
{
Aig_Obj_t * pObjNew;
if ( pObj->pData )
return pObj->pData;
Aig_ManDup_rec( pNew, p, Aig_ObjFanin0(pObj) );
if ( Aig_ObjIsBuf(pObj) )
return pObj->pData = Aig_ObjChild0Copy(pObj);
Aig_ManDup_rec( pNew, p, Aig_ObjFanin1(pObj) );
pObjNew = Aig_Oper( pNew, Aig_ObjChild0Copy(pObj), Aig_ObjChild1Copy(pObj), Aig_ObjType(pObj) );
Aig_Regular(pObjNew)->pHaig = pObj->pHaig;
return pObj->pData = pObjNew;
}
/**Function*************************************************************
Synopsis [Extracts the miter composed of XOR of the two nodes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Man_t * Aig_ManExtractMiter( Aig_Man_t * p, Aig_Obj_t * pNode1, Aig_Obj_t * pNode2 )
{
Aig_Man_t * pNew;
Aig_Obj_t * pObj;
int i;
// create the new manager
pNew = Aig_ManStart( Aig_ManObjNumMax(p) );
pNew->pName = Aig_UtilStrsav( p->pName );
pNew->pSpec = Aig_UtilStrsav( p->pSpec );
// create the PIs
Aig_ManCleanData( p );
Aig_ManConst1(p)->pData = Aig_ManConst1(pNew);
Aig_ManForEachPi( p, pObj, i )
pObj->pData = Aig_ObjCreatePi(pNew);
// dump the nodes
Aig_ManDup_rec( pNew, p, pNode1 );
Aig_ManDup_rec( pNew, p, pNode2 );
// construct the EXOR
pObj = Aig_Exor( pNew, pNode1->pData, pNode2->pData );
pObj = Aig_NotCond( pObj, Aig_Regular(pObj)->fPhase ^ Aig_IsComplement(pObj) );
// add the PO
Aig_ObjCreatePo( pNew, pObj );
// check the resulting network
if ( !Aig_ManCheck(pNew) )
printf( "Aig_ManDup(): The check has failed.\n" );
return pNew;
}
/**Function*************************************************************
Synopsis [Stops the AIG manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_ManStop( Aig_Man_t * p )
{
Aig_Obj_t * pObj;
int i;
if ( p->vMapped )
Vec_PtrFree( p->vMapped );
// print time
if ( p->time1 ) { PRT( "time1", p->time1 ); }
if ( p->time2 ) { PRT( "time2", p->time2 ); }
// delete timing
if ( p->pManTime )
Tim_ManStop( p->pManTime );
// delete fanout
if ( p->pFanData )
Aig_ManFanoutStop( p );
// make sure the nodes have clean marks
Aig_ManForEachObj( p, pObj, i )
assert( !pObj->fMarkA && !pObj->fMarkB );
// Aig_TableProfile( p );
Aig_MmFixedStop( p->pMemObjs, 0 );
if ( p->vPis ) Vec_PtrFree( p->vPis );
if ( p->vPos ) Vec_PtrFree( p->vPos );
if ( p->vObjs ) Vec_PtrFree( p->vObjs );
if ( p->vBufs ) Vec_PtrFree( p->vBufs );
if ( p->vLevelR ) Vec_IntFree( p->vLevelR );
if ( p->vLevels ) Vec_VecFree( p->vLevels );
if ( p->vFlopNums) Vec_IntFree( p->vFlopNums );
if ( p->vFlopReprs)Vec_IntFree( p->vFlopReprs );
if ( p->pManExdc ) Aig_ManStop( p->pManExdc );
if ( p->vOnehots ) Vec_VecFree( (Vec_Vec_t *)p->vOnehots );
FREE( p->pData );
FREE( p->pSeqModel );
FREE( p->pName );
FREE( p->pSpec );
FREE( p->pObjCopies );
FREE( p->pReprs );
FREE( p->pEquivs );
free( p->pTable );
free( p );
}
/**Function*************************************************************
Synopsis [Removes combinational logic that does not feed into POs.]
Description [Returns the number of dangling nodes removed.]
SideEffects []
SeeAlso []
***********************************************************************/
int Aig_ManCleanup( Aig_Man_t * p )
{
Vec_Ptr_t * vObjs;
Aig_Obj_t * pNode;
int i, nNodesOld;
nNodesOld = Aig_ManNodeNum(p);
// collect roots of dangling nodes
vObjs = Vec_PtrAlloc( 100 );
Aig_ManForEachObj( p, pNode, i )
if ( Aig_ObjIsNode(pNode) && Aig_ObjRefs(pNode) == 0 )
Vec_PtrPush( vObjs, pNode );
// recursively remove dangling nodes
Vec_PtrForEachEntry( vObjs, pNode, i )
Aig_ObjDelete_rec( p, pNode, 1 );
Vec_PtrFree( vObjs );
return nNodesOld - Aig_ManNodeNum(p);
}
/**Function*************************************************************
Synopsis [Removes PIs without fanouts.]
Description [Returns the number of PIs removed.]
SideEffects []
SeeAlso []
***********************************************************************/
int Aig_ManPiCleanup( Aig_Man_t * p )
{
Aig_Obj_t * pObj;
int i, k = 0, nPisOld = Aig_ManPiNum(p);
Vec_PtrForEachEntry( p->vPis, pObj, i )
{
if ( i >= Aig_ManPiNum(p) - Aig_ManRegNum(p) )
Vec_PtrWriteEntry( p->vPis, k++, pObj );
else if ( Aig_ObjRefs(pObj) > 0 )
Vec_PtrWriteEntry( p->vPis, k++, pObj );
else
Vec_PtrWriteEntry( p->vObjs, pObj->Id, NULL );
}
Vec_PtrShrink( p->vPis, k );
p->nObjs[AIG_OBJ_PI] = Vec_PtrSize( p->vPis );
if ( Aig_ManRegNum(p) )
p->nTruePis = Aig_ManPiNum(p) - Aig_ManRegNum(p);
return nPisOld - Aig_ManPiNum(p);
}
/**Function*************************************************************
Synopsis [Performs one iteration of AIG rewriting.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Aig_ManHaigCounter( Aig_Man_t * pAig )
{
Aig_Obj_t * pObj;
int Counter, i;
Counter = 0;
Aig_ManForEachNode( pAig, pObj, i )
Counter += (pObj->pHaig != NULL);
return Counter;
}
/**Function*************************************************************
Synopsis [Stops the AIG manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_ManPrintStats( Aig_Man_t * p )
{
int nChoices = Aig_ManCountChoices(p);
printf( "%-15s : ", p->pName );
printf( "pi = %5d ", Aig_ManPiNum(p) );
printf( "po = %5d ", Aig_ManPoNum(p) );
if ( Aig_ManRegNum(p) )
printf( "lat = %5d ", Aig_ManRegNum(p) );
printf( "and = %7d ", Aig_ManAndNum(p) );
// printf( "Eq = %7d ", Aig_ManHaigCounter(p) );
if ( Aig_ManExorNum(p) )
printf( "xor = %5d ", Aig_ManExorNum(p) );
if ( nChoices )
printf( "ch = %5d ", nChoices );
if ( Aig_ManBufNum(p) )
printf( "buf = %5d ", Aig_ManBufNum(p) );
// printf( "Cre = %6d ", p->nCreated );
// printf( "Del = %6d ", p->nDeleted );
// printf( "Lev = %3d ", Aig_ManLevelNum(p) );
// printf( "Max = %7d ", Aig_ManObjNumMax(p) );
printf( "lev = %3d", Aig_ManLevels(p) );
printf( "\n" );
fflush( stdout );
}
/**Function*************************************************************
Synopsis [Reports the reduction of the AIG.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_ManReportImprovement( Aig_Man_t * p, Aig_Man_t * pNew )
{
printf( "REG: Beg = %5d. End = %5d. (R =%5.1f %%) ",
Aig_ManRegNum(p), Aig_ManRegNum(pNew),
Aig_ManRegNum(p)? 100.0*(Aig_ManRegNum(p)-Aig_ManRegNum(pNew))/Aig_ManRegNum(p) : 0.0 );
printf( "AND: Beg = %6d. End = %6d. (R =%5.1f %%)",
Aig_ManNodeNum(p), Aig_ManNodeNum(pNew),
Aig_ManNodeNum(p)? 100.0*(Aig_ManNodeNum(p)-Aig_ManNodeNum(pNew))/Aig_ManNodeNum(p) : 0.0 );
printf( "\n" );
}
/**Function*************************************************************
Synopsis [Sets the number of registers in the AIG manager.]
Description [This procedure should be called after the manager is
fully constructed.]
SideEffects []
SeeAlso []
***********************************************************************/
void Aig_ManSetRegNum( Aig_Man_t * p, int nRegs )
{
p->nRegs = nRegs;
p->nTruePis = Aig_ManPiNum(p) - nRegs;
p->nTruePos = Aig_ManPoNum(p) - nRegs;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
