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/**CFile****************************************************************
FileName [seqLatch.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Construction and manipulation of sequential AIGs.]
Synopsis [Manipulation of latch data structures representing initial states.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: seqLatch.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "seqInt.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Insert the first Lat on the edge.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Seq_NodeInsertFirst( Abc_Obj_t * pObj, int Edge, Abc_InitType_t Init )
{
Seq_Lat_t * pLat, * pRing, * pPrev;
pRing = Seq_NodeGetRing( pObj, Edge );
pLat = Seq_NodeCreateLat( pObj );
if ( pRing == NULL )
{
Seq_LatSetPrev( pLat, pLat );
Seq_LatSetNext( pLat, pLat );
Seq_NodeSetRing( pObj, Edge, pLat );
}
else
{
pPrev = Seq_LatPrev( pRing );
Seq_LatSetPrev( pLat, pPrev );
Seq_LatSetNext( pPrev, pLat );
Seq_LatSetPrev( pRing, pLat );
Seq_LatSetNext( pLat, pRing );
Seq_NodeSetRing( pObj, Edge, pLat ); // rotate the ring to make pLat the first
}
Seq_LatSetInit( pLat, Init );
Seq_ObjAddFaninL( pObj, Edge, 1 );
assert( pLat->pLatch == NULL );
}
/**Function*************************************************************
Synopsis [Insert the last Lat on the edge.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Seq_NodeInsertLast( Abc_Obj_t * pObj, int Edge, Abc_InitType_t Init )
{
Seq_Lat_t * pLat, * pRing, * pPrev;
pRing = Seq_NodeGetRing( pObj, Edge );
pLat = Seq_NodeCreateLat( pObj );
if ( pRing == NULL )
{
Seq_LatSetPrev( pLat, pLat );
Seq_LatSetNext( pLat, pLat );
Seq_NodeSetRing( pObj, Edge, pLat );
}
else
{
pPrev = Seq_LatPrev( pRing );
Seq_LatSetPrev( pLat, pPrev );
Seq_LatSetNext( pPrev, pLat );
Seq_LatSetPrev( pRing, pLat );
Seq_LatSetNext( pLat, pRing );
}
Seq_LatSetInit( pLat, Init );
Seq_ObjAddFaninL( pObj, Edge, 1 );
}
/**Function*************************************************************
Synopsis [Delete the first Lat on the edge.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_InitType_t Seq_NodeDeleteFirst( Abc_Obj_t * pObj, int Edge )
{
Abc_InitType_t Init;
Seq_Lat_t * pLat, * pRing, * pPrev, * pNext;
pRing = Seq_NodeGetRing( pObj, Edge );
pLat = pRing; // consider the first latch
if ( pLat->pNext == pLat )
Seq_NodeSetRing( pObj, Edge, NULL );
else
{
pPrev = Seq_LatPrev( pLat );
pNext = Seq_LatNext( pLat );
Seq_LatSetPrev( pNext, pPrev );
Seq_LatSetNext( pPrev, pNext );
Seq_NodeSetRing( pObj, Edge, pNext ); // rotate the ring
}
Init = Seq_LatInit( pLat );
Seq_NodeRecycleLat( pObj, pLat );
Seq_ObjAddFaninL( pObj, Edge, -1 );
return Init;
}
/**Function*************************************************************
Synopsis [Delete the last Lat on the edge.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_InitType_t Seq_NodeDeleteLast( Abc_Obj_t * pObj, int Edge )
{
Abc_InitType_t Init;
Seq_Lat_t * pLat, * pRing, * pPrev, * pNext;
pRing = Seq_NodeGetRing( pObj, Edge );
pLat = Seq_LatPrev( pRing ); // consider the last latch
if ( pLat->pNext == pLat )
Seq_NodeSetRing( pObj, Edge, NULL );
else
{
pPrev = Seq_LatPrev( pLat );
pNext = Seq_LatNext( pLat );
Seq_LatSetPrev( pNext, pPrev );
Seq_LatSetNext( pPrev, pNext );
}
Init = Seq_LatInit( pLat );
Seq_NodeRecycleLat( pObj, pLat );
Seq_ObjAddFaninL( pObj, Edge, -1 );
return Init;
}
/**Function*************************************************************
Synopsis [Insert the last Lat on the edge.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Seq_NodeDupLats( Abc_Obj_t * pObjNew, Abc_Obj_t * pObj, int Edge )
{
Seq_Lat_t * pRing, * pLat;
int i, nLatches;
pRing = Seq_NodeGetRing( pObj, Edge );
if ( pRing == NULL )
return;
nLatches = Seq_NodeCountLats( pObj, Edge );
for ( i = 0, pLat = pRing; i < nLatches; i++, pLat = pLat->pNext )
Seq_NodeInsertLast( pObjNew, Edge, Seq_LatInit(pLat) );
}
/**Function*************************************************************
Synopsis [Insert the last Lat on the edge.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Seq_NodeCompareLats( Abc_Obj_t * pObj1, int Edge1, Abc_Obj_t * pObj2, int Edge2 )
{
Seq_Lat_t * pRing1, * pRing2, * pLat1, * pLat2;
int i, nLatches1, nLatches2;
nLatches1 = Seq_NodeCountLats( pObj1, Edge1 );
nLatches2 = Seq_NodeCountLats( pObj2, Edge2 );
if ( nLatches1 != nLatches2 )
return 0;
pRing1 = Seq_NodeGetRing( pObj1, Edge1 );
pRing2 = Seq_NodeGetRing( pObj2, Edge2 );
for ( i = 0, pLat1 = pRing1, pLat2 = pRing2; i < nLatches1; i++, pLat1 = pLat1->pNext, pLat2 = pLat2->pNext )
if ( Seq_LatInit(pLat1) != Seq_LatInit(pLat2) )
return 0;
return 1;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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