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abc/src/base/cba/cbaNtk.c

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/**CFile****************************************************************
FileName [cbaNtk.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Hierarchical word-level netlist.]
Synopsis [Netlist manipulation.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - November 29, 2014.]
Revision [$Id: cbaNtk.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
***********************************************************************/
#include "cba.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Cba_ManAssignInternNamesNtk( Cba_Ntk_t * p )
{
char Buffer[100];
int i, iObj, iTerm, NameId, fFound, nNameLess = 0;
int nDigits = Abc_Base10Log( Cba_NtkObjNum(p) );
// PI/PO should have NameId
Cba_NtkForEachPi( p, iObj, i )
assert( Cba_ObjName(p, iObj) );
Cba_NtkForEachPo( p, iObj, i )
assert( Cba_ObjName(p, iObj) );
// user BI/BO should have NameId
Cba_NtkForEachBoxUser( p, iObj )
{
Cba_BoxForEachBi( p, iObj, iTerm, i )
assert( Cba_ObjName(p, iTerm) );
Cba_BoxForEachBo( p, iObj, iTerm, i )
assert( Cba_ObjName(p, iTerm) );
}
// check missing IDs
Cba_NtkForEachBoxPrim( p, iObj )
{
Cba_BoxForEachBi( p, iObj, iTerm, i )
nNameLess += !Cba_ObjName(p, iTerm);
Cba_BoxForEachBo( p, iObj, iTerm, i )
nNameLess += !Cba_ObjName(p, iTerm);
}
if ( !nNameLess )
return;
// create names for prim BO
Cba_NtkForEachBoxPrim( p, iObj )
Cba_BoxForEachBo( p, iObj, iTerm, i )
{
if ( Cba_ObjName(p, iTerm) )
continue;
sprintf( Buffer, "%s%0*d", "_n_", nDigits, iTerm );
NameId = Abc_NamStrFindOrAdd( p->pDesign->pStrs, Buffer, &fFound );
assert( !fFound );
Cba_ObjSetName( p, iTerm, NameId );
}
// transfer names for prim BI
Cba_NtkForEachBoxPrim( p, iObj )
Cba_BoxForEachBi( p, iObj, iTerm, i )
{
if ( Cba_ObjName(p, iTerm) )
continue;
assert( Cba_ObjName(p, Cba_ObjFanin(p, iTerm)) );
Cba_ObjSetName( p, iTerm, Cba_ObjName(p, Cba_ObjFanin(p, iTerm)) );
}
}
void Cba_ManAssignInternNames( Cba_Man_t * p )
{
Cba_Ntk_t * pNtk; int i;
Cba_ManForEachNtk( p, pNtk, i )
Cba_ManAssignInternNamesNtk( pNtk );
}
/**Function*************************************************************
Synopsis [Count number of objects after collapsing.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Cba_ManClpObjNum_rec( Cba_Ntk_t * p )
{
int i, Counter = 0;
if ( p->Count >= 0 )
return p->Count;
Cba_NtkForEachBox( p, i )
Counter += Cba_ObjIsBoxUser(p, i) ? Cba_ManClpObjNum_rec( Cba_BoxNtk(p, i) ) : Cba_BoxSize(p, i);
return (p->Count = Counter);
}
int Cba_ManClpObjNum( Cba_Man_t * p )
{
Cba_Ntk_t * pNtk; int i;
Cba_ManForEachNtk( p, pNtk, i )
pNtk->Count = -1;
return Cba_NtkPioNum( Cba_ManRoot(p) ) + Cba_ManClpObjNum_rec( Cba_ManRoot(p) );
}
/**Function*************************************************************
Synopsis [Collects boxes in the DFS order.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Cba_NtkDfs_rec( Cba_Ntk_t * p, int iObj, Vec_Int_t * vBoxes )
{
int k, iFanin;
if ( Cba_ObjIsBo(p, iObj) == 1 )
{
Cba_NtkDfs_rec( p, Cba_ObjFanin(p, iObj), vBoxes );
return;
}
assert( Cba_ObjIsPi(p, iObj) || Cba_ObjIsBox(p, iObj) );
if ( Cba_ObjCopy(p, iObj) > 0 ) // visited
return;
Cba_ObjSetCopy( p, iObj, 1 );
Cba_BoxForEachFanin( p, iObj, iFanin, k )
Cba_NtkDfs_rec( p, iFanin, vBoxes );
Vec_IntPush( vBoxes, iObj );
}
Vec_Int_t * Cba_NtkDfs( Cba_Ntk_t * p )
{
int i, iObj;
Vec_Int_t * vBoxes = Vec_IntAlloc( Cba_NtkBoxNum(p) );
Cba_NtkStartCopies( p ); // -1 = not visited; 1 = finished
Cba_NtkForEachPi( p, iObj, i )
Cba_ObjSetCopy( p, iObj, 1 );
Cba_NtkForEachPo( p, iObj, i )
Cba_NtkDfs_rec( p, Cba_ObjFanin(p, iObj), vBoxes );
return vBoxes;
}
/**Function*************************************************************
Synopsis [Collects user boxes in the DFS order.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Cba_NtkDfsUserBoxes_rec( Cba_Ntk_t * p, int iObj, Vec_Int_t * vBoxes )
{
int k, iFanin;
assert( Cba_ObjIsBoxUser(p, iObj) );
if ( Cba_ObjCopy(p, iObj) == 1 ) // visited
return 1;
if ( Cba_ObjCopy(p, iObj) == 0 ) // loop
return 0;
Cba_ObjSetCopy( p, iObj, 0 );
Cba_BoxForEachFanin( p, iObj, iFanin, k )
if ( Cba_ObjIsBo(p, iFanin) && Cba_ObjIsBoxUser(p, Cba_ObjFanin(p, iFanin)) )
if ( !Cba_NtkDfsUserBoxes_rec( p, Cba_ObjFanin(p, iFanin), vBoxes ) )
return 0;
Vec_IntPush( vBoxes, iObj );
Cba_ObjSetCopy( p, iObj, 1 );
return 1;
}
int Cba_NtkDfsUserBoxes( Cba_Ntk_t * p )
{
int iObj;
Cba_NtkStartCopies( p ); // -1 = not visited; 0 = on the path; 1 = finished
Vec_IntClear( &p->vArray );
Cba_NtkForEachBoxUser( p, iObj )
if ( !Cba_NtkDfsUserBoxes_rec( p, iObj, &p->vArray ) )
{
printf( "Cyclic dependency of user boxes is detected.\n" );
return 0;
}
return 1;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Cba_NtkCollapse_rec( Cba_Ntk_t * pNew, Cba_Ntk_t * p, Vec_Int_t * vSigs )
{
int i, k, iObj, iTerm;
Cba_NtkStartCopies( p );
// set PI copies
assert( Vec_IntSize(vSigs) == Cba_NtkPiNum(p) );
Cba_NtkForEachPi( p, iObj, i )
Cba_ObjSetCopy( p, iObj, Vec_IntEntry(vSigs, i) );
// duplicate internal objects
Cba_NtkForEachBox( p, iObj )
if ( Cba_ObjIsBoxPrim(p, iObj) )
Cba_BoxDup( pNew, p, iObj );
// duplicate user moduled in DFS order
Vec_IntForEachEntry( &p->vArray, iObj, i )
{
assert( Cba_ObjIsBoxUser(p, iObj) );
Vec_IntClear( vSigs );
Cba_BoxForEachBi( p, iObj, iTerm, k )
Vec_IntPush( vSigs, Cba_ObjCopy(p, Cba_ObjFanin(p, iTerm)) );
Cba_NtkCollapse_rec( pNew, Cba_BoxNtk(p, iObj), vSigs );
assert( Vec_IntSize(vSigs) == Cba_BoxBoNum(p, iObj) );
Cba_BoxForEachBo( p, iObj, iTerm, k )
Cba_ObjSetCopy( p, iTerm, Vec_IntEntry(vSigs, k) );
}
// connect objects
Cba_NtkForEachBi( p, iObj )
Cba_ObjSetFanin( pNew, Cba_ObjCopy(p, iObj), Cba_ObjCopy(p, Cba_ObjFanin(p, iObj)) );
// collect POs
Vec_IntClear( vSigs );
Cba_NtkForEachPo( p, iObj, i )
Vec_IntPush( vSigs, Cba_ObjCopy(p, Cba_ObjFanin(p, iObj)) );
}
Cba_Man_t * Cba_ManCollapseInt( Cba_Man_t * p )
{
int i, iObj;
Vec_Int_t * vSigs = Vec_IntAlloc( 1000 );
Cba_Man_t * pNew = Cba_ManStart( p, 1 );
Cba_Ntk_t * pRoot = Cba_ManRoot( p );
Cba_Ntk_t * pRootNew = Cba_ManRoot( pNew );
Cba_NtkAlloc( pRootNew, Cba_NtkNameId(pRoot), Cba_NtkPiNum(pRoot), Cba_NtkPoNum(pRoot), Cba_ManClpObjNum(p) );
Cba_NtkForEachPi( pRoot, iObj, i )
Vec_IntPush( vSigs, Cba_ObjAlloc(pRootNew, CBA_OBJ_PI, i, -1) );
Cba_NtkCollapse_rec( pRootNew, pRoot, vSigs );
assert( Vec_IntSize(vSigs) == Cba_NtkPoNum(pRoot) );
Cba_NtkForEachPo( pRoot, iObj, i )
Cba_ObjAlloc( pRootNew, CBA_OBJ_PO, i, Vec_IntEntry(vSigs, i) );
assert( Cba_NtkObjNum(pRootNew) == Cba_NtkAllocNum(pRootNew) );
Vec_IntFree( vSigs );
// transfer PI/PO names
Cba_NtkStartNames( pRootNew );
Cba_NtkForEachPo( pRoot, iObj, i )
Cba_ObjSetName( pRootNew, Cba_NtkPo(pRootNew, i), Cba_ObjName(pRoot, iObj) );
Cba_NtkForEachPo( pRoot, iObj, i )
Cba_ObjSetName( pRootNew, Cba_NtkPo(pRootNew, i), Cba_ObjName(pRoot, iObj) );
return pNew;
}
Cba_Man_t * Cba_ManCollapse( Cba_Man_t * p )
{
Cba_Ntk_t * pNtk; int i;
Cba_ManForEachNtk( p, pNtk, i )
if ( !Cba_NtkDfsUserBoxes(pNtk) )
return NULL;
return Cba_ManCollapseInt( p );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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