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/**CFile****************************************************************
FileName [abcFpgaFast.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Network and node package.]
Synopsis [Fast FPGA mapper.]
Author [Sungmin Cho]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: abcFpgaFast.c,v 1.00 2006/09/02 00:00:00 alanmi Exp $]
***********************************************************************/
#include "base/abc/abc.h"
#include "aig/ivy/ivy.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
extern Ivy_Man_t * Abc_NtkIvyBefore( Abc_Ntk_t * pNtk, int fSeq, int fUseDc );
static Abc_Ntk_t * Ivy_ManFpgaToAbc( Abc_Ntk_t * pNtk, Ivy_Man_t * pMan );
static Abc_Obj_t * Ivy_ManToAbcFast_rec( Abc_Ntk_t * pNtkNew, Ivy_Man_t * pMan, Ivy_Obj_t * pObjIvy, Vec_Int_t * vNodes );
static inline void Abc_ObjSetIvy2Abc( Ivy_Man_t * p, int IvyId, Abc_Obj_t * pObjAbc ) { assert(Vec_PtrEntry((Vec_Ptr_t *)p->pCopy, IvyId) == NULL); assert(!Abc_ObjIsComplement(pObjAbc)); Vec_PtrWriteEntry( (Vec_Ptr_t *)p->pCopy, IvyId, pObjAbc ); }
static inline Abc_Obj_t * Abc_ObjGetIvy2Abc( Ivy_Man_t * p, int IvyId ) { return (Abc_Obj_t *)Vec_PtrEntry( (Vec_Ptr_t *)p->pCopy, IvyId ); }
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Performs fast FPGA mapping of the network.]
Description [Takes the AIG to be mapped, the LUT size, and verbosity
flag. Produces the new network by fast FPGA mapping of the current
network. If the current network in ABC in not an AIG, the user should
run command "strash" to make sure that the current network into an AIG
before calling this procedure.]
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkFpgaFast( Abc_Ntk_t * pNtk, int nLutSize, int fRecovery, int fVerbose )
{
Ivy_Man_t * pMan;
Abc_Ntk_t * pNtkNew;
// make sure the network is an AIG
assert( Abc_NtkIsStrash(pNtk) );
// convert the network into the AIG
pMan = Abc_NtkIvyBefore( pNtk, 0, 0 );
// perform fast FPGA mapping
Ivy_FastMapPerform( pMan, nLutSize, fRecovery, fVerbose );
// convert back into the ABC network
pNtkNew = Ivy_ManFpgaToAbc( pNtk, pMan );
Ivy_FastMapStop( pMan );
Ivy_ManStop( pMan );
// make sure that the final network passes the test
if ( pNtkNew != NULL && !Abc_NtkCheck( pNtkNew ) )
{
printf( "Abc_NtkFastMap: The network check has failed.\n" );
Abc_NtkDelete( pNtkNew );
return NULL;
}
return pNtkNew;
}
/**Function*************************************************************
Synopsis [Constructs the ABC network after mapping.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Ivy_ManFpgaToAbc( Abc_Ntk_t * pNtk, Ivy_Man_t * pMan )
{
Abc_Ntk_t * pNtkNew;
Abc_Obj_t * pObjAbc, * pObj;
Ivy_Obj_t * pObjIvy;
Vec_Int_t * vNodes;
int i;
// start mapping from Ivy into Abc
pMan->pCopy = Vec_PtrStart( Ivy_ManObjIdMax(pMan) + 1 );
// start the new ABC network
pNtkNew = Abc_NtkStartFrom( pNtk, ABC_NTK_LOGIC, ABC_FUNC_AIG );
// transfer the pointers to the basic nodes
Abc_ObjSetIvy2Abc( pMan, Ivy_ManConst1(pMan)->Id, Abc_NtkCreateNodeConst1(pNtkNew) );
Abc_NtkForEachCi( pNtkNew, pObjAbc, i )
Abc_ObjSetIvy2Abc( pMan, Ivy_ManPi(pMan, i)->Id, pObjAbc );
// recursively construct the network
vNodes = Vec_IntAlloc( 100 );
Ivy_ManForEachPo( pMan, pObjIvy, i )
{
// get the new ABC node corresponding to the old fanin of the PO in IVY
pObjAbc = Ivy_ManToAbcFast_rec( pNtkNew, pMan, Ivy_ObjFanin0(pObjIvy), vNodes );
// consider the case of complemented fanin of the PO
if ( Ivy_ObjFaninC0(pObjIvy) ) // complement
{
if ( Abc_ObjIsCi(pObjAbc) )
pObjAbc = Abc_NtkCreateNodeInv( pNtkNew, pObjAbc );
else
{
// clone the node
pObj = Abc_NtkCloneObj( pObjAbc );
// set complemented functions
pObj->pData = Hop_Not( (Hop_Obj_t *)pObjAbc->pData );
// return the new node
pObjAbc = pObj;
}
}
Abc_ObjAddFanin( Abc_NtkCo(pNtkNew, i), pObjAbc );
}
Vec_IntFree( vNodes );
Vec_PtrFree( (Vec_Ptr_t *)pMan->pCopy );
pMan->pCopy = NULL;
// remove dangling nodes
Abc_NtkCleanup( pNtkNew, 0 );
// fix CIs feeding directly into COs
Abc_NtkLogicMakeSimpleCos( pNtkNew, 0 );
return pNtkNew;
}
/**Function*************************************************************
Synopsis [Recursively construct the new node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Obj_t * Ivy_ManToAbcFast_rec( Abc_Ntk_t * pNtkNew, Ivy_Man_t * pMan, Ivy_Obj_t * pObjIvy, Vec_Int_t * vNodes )
{
Vec_Int_t Supp, * vSupp = &Supp;
Abc_Obj_t * pObjAbc, * pFaninAbc;
Ivy_Obj_t * pNodeIvy;
int i, Entry;
// skip the node if it is a constant or already processed
pObjAbc = Abc_ObjGetIvy2Abc( pMan, pObjIvy->Id );
if ( pObjAbc )
return pObjAbc;
assert( Ivy_ObjIsAnd(pObjIvy) || Ivy_ObjIsExor(pObjIvy) );
// get the support of K-LUT
Ivy_FastMapReadSupp( pMan, pObjIvy, vSupp );
// create new ABC node and its fanins
pObjAbc = Abc_NtkCreateNode( pNtkNew );
Vec_IntForEachEntry( vSupp, Entry, i )
{
pFaninAbc = Ivy_ManToAbcFast_rec( pNtkNew, pMan, Ivy_ManObj(pMan, Entry), vNodes );
Abc_ObjAddFanin( pObjAbc, pFaninAbc );
}
// collect the nodes used in the cut
Ivy_ManCollectCut( pMan, pObjIvy, vSupp, vNodes );
// create the local function
Ivy_ManForEachNodeVec( pMan, vNodes, pNodeIvy, i )
{
if ( i < Vec_IntSize(vSupp) )
pNodeIvy->pEquiv = (Ivy_Obj_t *)Hop_IthVar( (Hop_Man_t *)pNtkNew->pManFunc, i );
else
pNodeIvy->pEquiv = (Ivy_Obj_t *)Hop_And( (Hop_Man_t *)pNtkNew->pManFunc, (Hop_Obj_t *)Ivy_ObjChild0Equiv(pNodeIvy), (Hop_Obj_t *)Ivy_ObjChild1Equiv(pNodeIvy) );
}
// set the local function
pObjAbc->pData = (Abc_Obj_t *)pObjIvy->pEquiv;
// set the node
Abc_ObjSetIvy2Abc( pMan, pObjIvy->Id, pObjAbc );
return pObjAbc;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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