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-rw-r--r--src/aig/ivy/ivyFanout.c309
1 files changed, 309 insertions, 0 deletions
diff --git a/src/aig/ivy/ivyFanout.c b/src/aig/ivy/ivyFanout.c
new file mode 100644
index 00000000..3930186a
--- /dev/null
+++ b/src/aig/ivy/ivyFanout.c
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+/**CFile****************************************************************
+
+ FileName [ivyFanout.c]
+
+ SystemName [ABC: Logic synthesis and verification system.]
+
+ PackageName [And-Inverter Graph package.]
+
+ Synopsis [Representation of the fanouts.]
+
+ Author [Alan Mishchenko]
+
+ Affiliation [UC Berkeley]
+
+ Date [Ver. 1.0. Started - May 11, 2006.]
+
+ Revision [$Id: ivyFanout.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "ivy.h"
+
+////////////////////////////////////////////////////////////////////////
+/// DECLARATIONS ///
+////////////////////////////////////////////////////////////////////////
+
+// getting hold of the next fanout of the node
+static inline Ivy_Obj_t * Ivy_ObjNextFanout( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout )
+{
+ assert( !Ivy_IsComplement(pObj) );
+ assert( !Ivy_IsComplement(pFanout) );
+ if ( pFanout == NULL )
+ return NULL;
+ if ( Ivy_ObjFanin0(pFanout) == pObj )
+ return pFanout->pNextFan0;
+ assert( Ivy_ObjFanin1(pFanout) == pObj );
+ return pFanout->pNextFan1;
+}
+
+// getting hold of the previous fanout of the node
+static inline Ivy_Obj_t * Ivy_ObjPrevFanout( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout )
+{
+ assert( !Ivy_IsComplement(pObj) );
+ assert( !Ivy_IsComplement(pFanout) );
+ if ( pFanout == NULL )
+ return NULL;
+ if ( Ivy_ObjFanin0(pFanout) == pObj )
+ return pFanout->pPrevFan0;
+ assert( Ivy_ObjFanin1(pFanout) == pObj );
+ return pFanout->pPrevFan1;
+}
+
+// getting hold of the place where the next fanout will be attached
+static inline Ivy_Obj_t ** Ivy_ObjNextFanoutPlace( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout )
+{
+ assert( !Ivy_IsComplement(pObj) );
+ assert( !Ivy_IsComplement(pFanout) );
+ if ( Ivy_ObjFanin0(pFanout) == pObj )
+ return &pFanout->pNextFan0;
+ assert( Ivy_ObjFanin1(pFanout) == pObj );
+ return &pFanout->pNextFan1;
+}
+
+// getting hold of the place where the next fanout will be attached
+static inline Ivy_Obj_t ** Ivy_ObjPrevFanoutPlace( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout )
+{
+ assert( !Ivy_IsComplement(pObj) );
+ assert( !Ivy_IsComplement(pFanout) );
+ if ( Ivy_ObjFanin0(pFanout) == pObj )
+ return &pFanout->pPrevFan0;
+ assert( Ivy_ObjFanin1(pFanout) == pObj );
+ return &pFanout->pPrevFan1;
+}
+
+// getting hold of the place where the next fanout will be attached
+static inline Ivy_Obj_t ** Ivy_ObjPrevNextFanoutPlace( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout )
+{
+ Ivy_Obj_t * pTemp;
+ assert( !Ivy_IsComplement(pObj) );
+ assert( !Ivy_IsComplement(pFanout) );
+ pTemp = Ivy_ObjPrevFanout(pObj, pFanout);
+ if ( pTemp == NULL )
+ return &pObj->pFanout;
+ if ( Ivy_ObjFanin0(pTemp) == pObj )
+ return &pTemp->pNextFan0;
+ assert( Ivy_ObjFanin1(pTemp) == pObj );
+ return &pTemp->pNextFan1;
+}
+
+// getting hold of the place where the next fanout will be attached
+static inline Ivy_Obj_t ** Ivy_ObjNextPrevFanoutPlace( Ivy_Obj_t * pObj, Ivy_Obj_t * pFanout )
+{
+ Ivy_Obj_t * pTemp;
+ assert( !Ivy_IsComplement(pObj) );
+ assert( !Ivy_IsComplement(pFanout) );
+ pTemp = Ivy_ObjNextFanout(pObj, pFanout);
+ if ( pTemp == NULL )
+ return NULL;
+ if ( Ivy_ObjFanin0(pTemp) == pObj )
+ return &pTemp->pPrevFan0;
+ assert( Ivy_ObjFanin1(pTemp) == pObj );
+ return &pTemp->pPrevFan1;
+}
+
+// iterator through the fanouts of the node
+#define Ivy_ObjForEachFanoutInt( pObj, pFanout ) \
+ for ( pFanout = (pObj)->pFanout; pFanout; \
+ pFanout = Ivy_ObjNextFanout(pObj, pFanout) )
+
+// safe iterator through the fanouts of the node
+#define Ivy_ObjForEachFanoutIntSafe( pObj, pFanout, pFanout2 ) \
+ for ( pFanout = (pObj)->pFanout, \
+ pFanout2 = Ivy_ObjNextFanout(pObj, pFanout); \
+ pFanout; \
+ pFanout = pFanout2, \
+ pFanout2 = Ivy_ObjNextFanout(pObj, pFanout) )
+
+////////////////////////////////////////////////////////////////////////
+/// FUNCTION DEFINITIONS ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+ Synopsis [Starts the fanout representation.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ivy_ManStartFanout( Ivy_Man_t * p )
+{
+ Ivy_Obj_t * pObj;
+ int i;
+ assert( !p->fFanout );
+ p->fFanout = 1;
+ Ivy_ManForEachObj( p, pObj, i )
+ {
+ if ( Ivy_ObjFanin0(pObj) )
+ Ivy_ObjAddFanout( p, Ivy_ObjFanin0(pObj), pObj );
+ if ( Ivy_ObjFanin1(pObj) )
+ Ivy_ObjAddFanout( p, Ivy_ObjFanin1(pObj), pObj );
+ }
+}
+
+/**Function*************************************************************
+
+ Synopsis [Stops the fanout representation.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ivy_ManStopFanout( Ivy_Man_t * p )
+{
+ Ivy_Obj_t * pObj;
+ int i;
+ assert( p->fFanout );
+ p->fFanout = 0;
+ Ivy_ManForEachObj( p, pObj, i )
+ pObj->pFanout = pObj->pNextFan0 = pObj->pNextFan1 = pObj->pPrevFan0 = pObj->pPrevFan1 = NULL;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Add the fanout.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ivy_ObjAddFanout( Ivy_Man_t * p, Ivy_Obj_t * pFanin, Ivy_Obj_t * pFanout )
+{
+ assert( p->fFanout );
+ if ( pFanin->pFanout )
+ {
+ *Ivy_ObjNextFanoutPlace(pFanin, pFanout) = pFanin->pFanout;
+ *Ivy_ObjPrevFanoutPlace(pFanin, pFanin->pFanout) = pFanout;
+ }
+ pFanin->pFanout = pFanout;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Removes the fanout.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ivy_ObjDeleteFanout( Ivy_Man_t * p, Ivy_Obj_t * pFanin, Ivy_Obj_t * pFanout )
+{
+ Ivy_Obj_t ** ppPlace1, ** ppPlace2, ** ppPlaceN;
+ assert( pFanin->pFanout != NULL );
+
+ ppPlace1 = Ivy_ObjNextFanoutPlace(pFanin, pFanout);
+ ppPlaceN = Ivy_ObjPrevNextFanoutPlace(pFanin, pFanout);
+ assert( *ppPlaceN == pFanout );
+ if ( ppPlaceN )
+ *ppPlaceN = *ppPlace1;
+
+ ppPlace2 = Ivy_ObjPrevFanoutPlace(pFanin, pFanout);
+ ppPlaceN = Ivy_ObjNextPrevFanoutPlace(pFanin, pFanout);
+ assert( ppPlaceN == NULL || *ppPlaceN == pFanout );
+ if ( ppPlaceN )
+ *ppPlaceN = *ppPlace2;
+
+ *ppPlace1 = NULL;
+ *ppPlace2 = NULL;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Replaces the fanout of pOld to be pFanoutNew.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ivy_ObjPatchFanout( Ivy_Man_t * p, Ivy_Obj_t * pFanin, Ivy_Obj_t * pFanoutOld, Ivy_Obj_t * pFanoutNew )
+{
+ Ivy_Obj_t ** ppPlace;
+ ppPlace = Ivy_ObjPrevNextFanoutPlace(pFanin, pFanoutOld);
+ assert( *ppPlace == pFanoutOld );
+ if ( ppPlace )
+ *ppPlace = pFanoutNew;
+ ppPlace = Ivy_ObjNextPrevFanoutPlace(pFanin, pFanoutOld);
+ assert( ppPlace == NULL || *ppPlace == pFanoutOld );
+ if ( ppPlace )
+ *ppPlace = pFanoutNew;
+ // assuming that pFanoutNew already points to the next fanout
+}
+
+/**Function*************************************************************
+
+ Synopsis [Starts iteration through the fanouts.]
+
+ Description [Copies the currently available fanouts into the array.]
+
+ SideEffects [Can be used while the fanouts are being removed.]
+
+ SeeAlso []
+
+***********************************************************************/
+void Ivy_ObjCollectFanouts( Ivy_Man_t * p, Ivy_Obj_t * pObj, Vec_Ptr_t * vArray )
+{
+ Ivy_Obj_t * pFanout;
+ assert( p->fFanout );
+ assert( !Ivy_IsComplement(pObj) );
+ Vec_PtrClear( vArray );
+ Ivy_ObjForEachFanoutInt( pObj, pFanout )
+ Vec_PtrPush( vArray, pFanout );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Reads one fanout.]
+
+ Description [Returns fanout if there is only one fanout.]
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Ivy_Obj_t * Ivy_ObjReadFirstFanout( Ivy_Man_t * p, Ivy_Obj_t * pObj )
+{
+ return pObj->pFanout;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Reads one fanout.]
+
+ Description [Returns fanout if there is only one fanout.]
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Ivy_ObjFanoutNum( Ivy_Man_t * p, Ivy_Obj_t * pObj )
+{
+ Ivy_Obj_t * pFanout;
+ int Counter = 0;
+ Ivy_ObjForEachFanoutInt( pObj, pFanout )
+ Counter++;
+ return Counter;
+}
+
+////////////////////////////////////////////////////////////////////////
+/// END OF FILE ///
+////////////////////////////////////////////////////////////////////////
+
+
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