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/**CFile****************************************************************
FileName [hopDfs.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Minimalistic And-Inverter Graph package.]
Synopsis [DFS traversal procedures.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - May 11, 2006.]
Revision [$Id: hopDfs.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $]
***********************************************************************/
#include "hop.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Collects internal nodes in the DFS order.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ManDfs_rec( Hop_Obj_t * pObj, Vec_Ptr_t * vNodes )
{
assert( !Hop_IsComplement(pObj) );
if ( !Hop_ObjIsNode(pObj) || Hop_ObjIsMarkA(pObj) )
return;
Hop_ManDfs_rec( Hop_ObjFanin0(pObj), vNodes );
Hop_ManDfs_rec( Hop_ObjFanin1(pObj), vNodes );
assert( !Hop_ObjIsMarkA(pObj) ); // loop detection
Hop_ObjSetMarkA(pObj);
Vec_PtrPush( vNodes, pObj );
}
/**Function*************************************************************
Synopsis [Collects internal nodes in the DFS order.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Ptr_t * Hop_ManDfs( Hop_Man_t * p )
{
Vec_Ptr_t * vNodes;
Hop_Obj_t * pObj;
int i;
vNodes = Vec_PtrAlloc( Hop_ManNodeNum(p) );
Hop_ManForEachNode( p, pObj, i )
Hop_ManDfs_rec( pObj, vNodes );
Hop_ManForEachNode( p, pObj, i )
Hop_ObjClearMarkA(pObj);
return vNodes;
}
/**Function*************************************************************
Synopsis [Collects internal nodes in the DFS order.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Ptr_t * Hop_ManDfsNode( Hop_Man_t * p, Hop_Obj_t * pNode )
{
Vec_Ptr_t * vNodes;
Hop_Obj_t * pObj;
int i;
assert( !Hop_IsComplement(pNode) );
vNodes = Vec_PtrAlloc( 16 );
Hop_ManDfs_rec( pNode, vNodes );
Vec_PtrForEachEntry( vNodes, pObj, i )
Hop_ObjClearMarkA(pObj);
return vNodes;
}
/**Function*************************************************************
Synopsis [Computes the max number of levels in the manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Hop_ManCountLevels( Hop_Man_t * p )
{
Vec_Ptr_t * vNodes;
Hop_Obj_t * pObj;
int i, LevelsMax, Level0, Level1;
// initialize the levels
Hop_ManConst1(p)->pData = NULL;
Hop_ManForEachPi( p, pObj, i )
pObj->pData = NULL;
// compute levels in a DFS order
vNodes = Hop_ManDfs( p );
Vec_PtrForEachEntry( vNodes, pObj, i )
{
Level0 = (int)Hop_ObjFanin0(pObj)->pData;
Level1 = (int)Hop_ObjFanin1(pObj)->pData;
pObj->pData = (void *)(1 + Hop_ObjIsExor(pObj) + AIG_MAX(Level0, Level1));
}
Vec_PtrFree( vNodes );
// get levels of the POs
LevelsMax = 0;
Hop_ManForEachPo( p, pObj, i )
LevelsMax = AIG_MAX( LevelsMax, (int)Hop_ObjFanin0(pObj)->pData );
return LevelsMax;
}
/**Function*************************************************************
Synopsis [Creates correct reference counters at each node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ManCreateRefs( Hop_Man_t * p )
{
Hop_Obj_t * pObj;
int i;
if ( p->fRefCount )
return;
p->fRefCount = 1;
// clear refs
Hop_ObjClearRef( Hop_ManConst1(p) );
Hop_ManForEachPi( p, pObj, i )
Hop_ObjClearRef( pObj );
Hop_ManForEachNode( p, pObj, i )
Hop_ObjClearRef( pObj );
Hop_ManForEachPo( p, pObj, i )
Hop_ObjClearRef( pObj );
// set refs
Hop_ManForEachNode( p, pObj, i )
{
Hop_ObjRef( Hop_ObjFanin0(pObj) );
Hop_ObjRef( Hop_ObjFanin1(pObj) );
}
Hop_ManForEachPo( p, pObj, i )
Hop_ObjRef( Hop_ObjFanin0(pObj) );
}
/**Function*************************************************************
Synopsis [Counts the number of AIG nodes rooted at this cone.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ConeMark_rec( Hop_Obj_t * pObj )
{
assert( !Hop_IsComplement(pObj) );
if ( !Hop_ObjIsNode(pObj) || Hop_ObjIsMarkA(pObj) )
return;
Hop_ConeMark_rec( Hop_ObjFanin0(pObj) );
Hop_ConeMark_rec( Hop_ObjFanin1(pObj) );
assert( !Hop_ObjIsMarkA(pObj) ); // loop detection
Hop_ObjSetMarkA( pObj );
}
/**Function*************************************************************
Synopsis [Counts the number of AIG nodes rooted at this cone.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ConeCleanAndMark_rec( Hop_Obj_t * pObj )
{
assert( !Hop_IsComplement(pObj) );
if ( !Hop_ObjIsNode(pObj) || Hop_ObjIsMarkA(pObj) )
return;
Hop_ConeCleanAndMark_rec( Hop_ObjFanin0(pObj) );
Hop_ConeCleanAndMark_rec( Hop_ObjFanin1(pObj) );
assert( !Hop_ObjIsMarkA(pObj) ); // loop detection
Hop_ObjSetMarkA( pObj );
pObj->pData = NULL;
}
/**Function*************************************************************
Synopsis [Counts the number of AIG nodes rooted at this cone.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Hop_ConeCountAndMark_rec( Hop_Obj_t * pObj )
{
int Counter;
assert( !Hop_IsComplement(pObj) );
if ( !Hop_ObjIsNode(pObj) || Hop_ObjIsMarkA(pObj) )
return 0;
Counter = 1 + Hop_ConeCountAndMark_rec( Hop_ObjFanin0(pObj) ) +
Hop_ConeCountAndMark_rec( Hop_ObjFanin1(pObj) );
assert( !Hop_ObjIsMarkA(pObj) ); // loop detection
Hop_ObjSetMarkA( pObj );
return Counter;
}
/**Function*************************************************************
Synopsis [Counts the number of AIG nodes rooted at this cone.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ConeUnmark_rec( Hop_Obj_t * pObj )
{
assert( !Hop_IsComplement(pObj) );
if ( !Hop_ObjIsNode(pObj) || !Hop_ObjIsMarkA(pObj) )
return;
Hop_ConeUnmark_rec( Hop_ObjFanin0(pObj) );
Hop_ConeUnmark_rec( Hop_ObjFanin1(pObj) );
assert( Hop_ObjIsMarkA(pObj) ); // loop detection
Hop_ObjClearMarkA( pObj );
}
/**Function*************************************************************
Synopsis [Counts the number of AIG nodes rooted at this cone.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Hop_DagSize( Hop_Obj_t * pObj )
{
int Counter;
Counter = Hop_ConeCountAndMark_rec( Hop_Regular(pObj) );
Hop_ConeUnmark_rec( Hop_Regular(pObj) );
return Counter;
}
/**Function*************************************************************
Synopsis [Transfers the AIG from one manager into another.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_Transfer_rec( Hop_Man_t * pDest, Hop_Obj_t * pObj )
{
assert( !Hop_IsComplement(pObj) );
if ( !Hop_ObjIsNode(pObj) || Hop_ObjIsMarkA(pObj) )
return;
Hop_Transfer_rec( pDest, Hop_ObjFanin0(pObj) );
Hop_Transfer_rec( pDest, Hop_ObjFanin1(pObj) );
pObj->pData = Hop_And( pDest, Hop_ObjChild0Copy(pObj), Hop_ObjChild1Copy(pObj) );
assert( !Hop_ObjIsMarkA(pObj) ); // loop detection
Hop_ObjSetMarkA( pObj );
}
/**Function*************************************************************
Synopsis [Transfers the AIG from one manager into another.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Hop_Obj_t * Hop_Transfer( Hop_Man_t * pSour, Hop_Man_t * pDest, Hop_Obj_t * pRoot, int nVars )
{
Hop_Obj_t * pObj;
int i;
// solve simple cases
if ( pSour == pDest )
return pRoot;
if ( Hop_ObjIsConst1( Hop_Regular(pRoot) ) )
return Hop_NotCond( Hop_ManConst1(pDest), Hop_IsComplement(pRoot) );
// set the PI mapping
Hop_ManForEachPi( pSour, pObj, i )
{
if ( i == nVars )
break;
pObj->pData = Hop_IthVar(pDest, i);
}
// transfer and set markings
Hop_Transfer_rec( pDest, Hop_Regular(pRoot) );
// clear the markings
Hop_ConeUnmark_rec( Hop_Regular(pRoot) );
return Hop_NotCond( Hop_Regular(pRoot)->pData, Hop_IsComplement(pRoot) );
}
/**Function*************************************************************
Synopsis [Composes the AIG (pRoot) with the function (pFunc) using PI var (iVar).]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_Compose_rec( Hop_Man_t * p, Hop_Obj_t * pObj, Hop_Obj_t * pFunc, Hop_Obj_t * pVar )
{
assert( !Hop_IsComplement(pObj) );
if ( Hop_ObjIsMarkA(pObj) )
return;
if ( Hop_ObjIsConst1(pObj) || Hop_ObjIsPi(pObj) )
{
pObj->pData = pObj == pVar ? pFunc : pObj;
return;
}
Hop_Compose_rec( p, Hop_ObjFanin0(pObj), pFunc, pVar );
Hop_Compose_rec( p, Hop_ObjFanin1(pObj), pFunc, pVar );
pObj->pData = Hop_And( p, Hop_ObjChild0Copy(pObj), Hop_ObjChild1Copy(pObj) );
assert( !Hop_ObjIsMarkA(pObj) ); // loop detection
Hop_ObjSetMarkA( pObj );
}
/**Function*************************************************************
Synopsis [Composes the AIG (pRoot) with the function (pFunc) using PI var (iVar).]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Hop_Obj_t * Hop_Compose( Hop_Man_t * p, Hop_Obj_t * pRoot, Hop_Obj_t * pFunc, int iVar )
{
// quit if the PI variable is not defined
if ( iVar >= Hop_ManPiNum(p) )
{
printf( "Hop_Compose(): The PI variable %d is not defined.\n", iVar );
return NULL;
}
// recursively perform composition
Hop_Compose_rec( p, Hop_Regular(pRoot), pFunc, Hop_ManPi(p, iVar) );
// clear the markings
Hop_ConeUnmark_rec( Hop_Regular(pRoot) );
return Hop_NotCond( Hop_Regular(pRoot)->pData, Hop_IsComplement(pRoot) );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
