/**Function*************************************************************
Synopsis [Computes equivalence classes of objects in pNtk1 and pNtk2.]
Description [Returns the array (Vec_Ptr_t) of integer arrays (Vec_Int_t).
Each of the integer arrays contains entries of one equivalence class.
Each entry contains the following information: the network number (0/1),
the polarity (0/1) and the object ID in the the network (0 <= num < MaxId)
where MaxId is the largest number of an ID of an object in that network.]
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Ptr_t * Abc_NtkDressComputeEquivs( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nConflictLimit, int fVerbose )
{
Dch_Pars_t Pars, * pPars = &Pars;
Abc_Ntk_t * pAig1, * pAig2;
Aig_Man_t * pMan1, * pMan2, * pMiter;
Vec_Ptr_t * vRes;
assert( !Abc_NtkIsStrash(pNtk1) );
assert( !Abc_NtkIsStrash(pNtk2) );
// convert network into AIG
pAig1 = Abc_NtkStrash( pNtk1, 1, 1, 0 );
pAig2 = Abc_NtkStrash( pNtk2, 1, 1, 0 );
pMan1 = Abc_NtkToDar( pAig1, 0, 0 );
pMan2 = Abc_NtkToDar( pAig2, 0, 0 );
// derive the miter
pMiter = Aig_ManCreateDualOutputMiter( pMan1, pMan2 );
// set up parameters for SAT sweeping
Dch_ManSetDefaultParams( pPars );
pPars->nBTLimit = nConflictLimit;
pPars->fVerbose = fVerbose;
// perform SAT sweeping
Dch_ComputeEquivalences( pMiter, pPars );
// now, pMiter is annotated with the equivl class info
// convert this info into the resulting array
vRes = Abc_NtkDressMapIds( pMiter, pNtk1, pNtk2 );
Aig_ManStop( pMiter );
Aig_ManStop( pMan1 );
Aig_ManStop( pMan2 );
Abc_NtkDelete( pAig1 );
Abc_NtkDelete( pAig2 );
return vRes;
}
/**Function*************************************************************
Synopsis [Computes initial values of the new latches.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Int_t * Abc_NtkRetimeInitialValues( Abc_Ntk_t * pNtkCone, Vec_Int_t * vValues, int fVerbose )
{
Vec_Int_t * vSolution;
Abc_Ntk_t * pNtkMiter, * pNtkLogic;
int RetValue;
abctime clk;
if ( pNtkCone == NULL )
return Vec_IntDup( vValues );
// convert the target network to AIG
pNtkLogic = Abc_NtkDup( pNtkCone );
Abc_NtkToAig( pNtkLogic );
// get the miter
pNtkMiter = Abc_NtkCreateTarget( pNtkLogic, pNtkLogic->vCos, vValues );
if ( fVerbose )
printf( "The miter for initial state computation has %d AIG nodes. ", Abc_NtkNodeNum(pNtkMiter) );
// solve the miter
clk = Abc_Clock();
RetValue = Abc_NtkMiterSat( pNtkMiter, (ABC_INT64_T)500000, (ABC_INT64_T)50000000, 0, NULL, NULL );
if ( fVerbose )
{ ABC_PRT( "SAT solving time", Abc_Clock() - clk ); }
// analyze the result
if ( RetValue == 1 )
printf( "Abc_NtkRetimeInitialValues(): The problem is unsatisfiable. DC latch values are used.\n" );
else if ( RetValue == -1 )
printf( "Abc_NtkRetimeInitialValues(): The SAT problem timed out. DC latch values are used.\n" );
else if ( !Abc_NtkRetimeVerifyModel( pNtkCone, vValues, pNtkMiter->pModel ) )
printf( "Abc_NtkRetimeInitialValues(): The computed counter-example is incorrect.\n" );
// set the values of the latches
vSolution = RetValue? NULL : Vec_IntAllocArray( pNtkMiter->pModel, Abc_NtkPiNum(pNtkLogic) );
pNtkMiter->pModel = NULL;
Abc_NtkDelete( pNtkMiter );
Abc_NtkDelete( pNtkLogic );
return vSolution;
}
/**Function*************************************************************
Synopsis [Extracts sequential DCs of the network.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkExtractSequentialDcs( Abc_Ntk_t * pNtk, int fVerbose )
{
int fReorder = 1;
DdManager * dd;
DdNode * bRelation, * bInitial, * bUnreach;
// remove EXDC network if present
if ( pNtk->pExdc )
{
Abc_NtkDelete( pNtk->pExdc );
pNtk->pExdc = NULL;
}
// compute the global BDDs of the latches
dd = Abc_NtkBuildGlobalBdds( pNtk, 10000000, 1, 1, fVerbose );
if ( dd == NULL )
return 0;
if ( fVerbose )
printf( "Shared BDD size = %6d nodes.\n", Cudd_ReadKeys(dd) - Cudd_ReadDead(dd) );
// create the transition relation (dereferenced global BDDs)
bRelation = Abc_NtkTransitionRelation( dd, pNtk, fVerbose ); Cudd_Ref( bRelation );
// create the initial state and the variable map
bInitial = Abc_NtkInitStateAndVarMap( dd, pNtk, fVerbose ); Cudd_Ref( bInitial );
// compute the unreachable states
bUnreach = Abc_NtkComputeUnreachable( dd, pNtk, bRelation, bInitial, fVerbose ); Cudd_Ref( bUnreach );
Cudd_RecursiveDeref( dd, bRelation );
Cudd_RecursiveDeref( dd, bInitial );
// reorder and disable reordering
if ( fReorder )
{
if ( fVerbose )
fprintf( stdout, "BDD nodes in the unreachable states before reordering %d.\n", Cudd_DagSize(bUnreach) );
Cudd_ReduceHeap( dd, CUDD_REORDER_SYMM_SIFT, 1 );
Cudd_AutodynDisable( dd );
if ( fVerbose )
fprintf( stdout, "BDD nodes in the unreachable states after reordering %d.\n", Cudd_DagSize(bUnreach) );
}
// allocate ZDD variables
Cudd_zddVarsFromBddVars( dd, 2 );
// create the EXDC network representing the unreachable states
if ( pNtk->pExdc )
Abc_NtkDelete( pNtk->pExdc );
pNtk->pExdc = Abc_NtkConstructExdc( dd, pNtk, bUnreach );
Cudd_RecursiveDeref( dd, bUnreach );
Extra_StopManager( dd );
// pNtk->pManGlob = NULL;
// make sure that everything is okay
if ( pNtk->pExdc && !Abc_NtkCheck( pNtk->pExdc ) )
{
printf( "Abc_NtkExtractSequentialDcs: The network check has failed.\n" );
Abc_NtkDelete( pNtk->pExdc );
return 0;
}
return 1;
}
/**Function*************************************************************
Synopsis [Read the network from a file.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Io_Read( char * pFileName, Io_FileType_t FileType, int fCheck )
{
Abc_Ntk_t * pNtk, * pTemp;
// get the netlist
pNtk = Io_ReadNetlist( pFileName, FileType, fCheck );
if ( pNtk == NULL )
return NULL;
if ( !Abc_NtkIsNetlist(pNtk) )
return pNtk;
// flatten logic hierarchy
assert( Abc_NtkIsNetlist(pNtk) );
if ( Abc_NtkWhiteboxNum(pNtk) > 0 )
{
pNtk = Abc_NtkFlattenLogicHierarchy( pTemp = pNtk );
Abc_NtkDelete( pTemp );
if ( pNtk == NULL )
{
fprintf( stdout, "Flattening logic hierarchy has failed.\n" );
return NULL;
}
}
// convert blackboxes
if ( Abc_NtkBlackboxNum(pNtk) > 0 )
{
printf( "Hierarchy reader converted %d instances of blackboxes.\n", Abc_NtkBlackboxNum(pNtk) );
pNtk = Abc_NtkConvertBlackboxes( pTemp = pNtk );
Abc_NtkDelete( pTemp );
if ( pNtk == NULL )
{
fprintf( stdout, "Converting blackboxes has failed.\n" );
return NULL;
}
}
// consider the case of BLIF-MV
if ( Io_ReadFileType(pFileName) == IO_FILE_BLIFMV )
{
//Abc_NtkPrintStats( stdout, pNtk, 0 );
// Io_WriteBlifMv( pNtk, "_temp_.mv" );
pNtk = Abc_NtkStrashBlifMv( pTemp = pNtk );
Abc_NtkDelete( pTemp );
if ( pNtk == NULL )
{
fprintf( stdout, "Converting BLIF-MV to AIG has failed.\n" );
return NULL;
}
return pNtk;
}
// convert the netlist into the logic network
pNtk = Abc_NtkToLogic( pTemp = pNtk );
Abc_NtkDelete( pTemp );
if ( pNtk == NULL )
{
fprintf( stdout, "Converting netlist to logic network after reading has failed.\n" );
return NULL;
}
return pNtk;
}
/**Function*************************************************************
Synopsis [Verifies combinational equivalence by brute-force SAT.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkCecSat( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nConfLimit, int nInsLimit )
{
extern Abc_Ntk_t * Abc_NtkMulti( Abc_Ntk_t * pNtk, int nThresh, int nFaninMax, int fCnf, int fMulti, int fSimple, int fFactor );
Abc_Ntk_t * pMiter;
Abc_Ntk_t * pCnf;
int RetValue;
// get the miter of the two networks
pMiter = Abc_NtkMiter( pNtk1, pNtk2, 1, 0 );
if ( pMiter == NULL )
{
printf( "Miter computation has failed.\n" );
return;
}
RetValue = Abc_NtkMiterIsConstant( pMiter );
if ( RetValue == 0 )
{
printf( "Networks are NOT EQUIVALENT after structural hashing.\n" );
// report the error
pMiter->pModel = Abc_NtkVerifyGetCleanModel( pMiter, 1 );
Abc_NtkVerifyReportError( pNtk1, pNtk2, pMiter->pModel );
FREE( pMiter->pModel );
Abc_NtkDelete( pMiter );
return;
}
if ( RetValue == 1 )
{
Abc_NtkDelete( pMiter );
printf( "Networks are equivalent after structural hashing.\n" );
return;
}
// convert the miter into a CNF
pCnf = Abc_NtkMulti( pMiter, 0, 100, 1, 0, 0, 0 );
Abc_NtkDelete( pMiter );
if ( pCnf == NULL )
{
printf( "Renoding for CNF has failed.\n" );
return;
}
// solve the CNF using the SAT solver
RetValue = Abc_NtkMiterSat( pCnf, (sint64)nConfLimit, (sint64)nInsLimit, 0, NULL, NULL );
if ( RetValue == -1 )
printf( "Networks are undecided (SAT solver timed out).\n" );
else if ( RetValue == 0 )
printf( "Networks are NOT EQUIVALENT after SAT.\n" );
else
printf( "Networks are equivalent after SAT.\n" );
if ( pCnf->pModel )
Abc_NtkVerifyReportError( pNtk1, pNtk2, pCnf->pModel );
FREE( pCnf->pModel );
Abc_NtkDelete( pCnf );
}
/**Function*************************************************************
Synopsis [Deletes the manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void ABC_ReleaseManager( ABC_Manager mng )
{
CSAT_Target_ResultT * p_res = ABC_Get_Target_Result( mng,0 );
ABC_TargetResFree(p_res);
if ( mng->tNode2Name ) stmm_free_table( mng->tNode2Name );
if ( mng->tName2Node ) stmm_free_table( mng->tName2Node );
if ( mng->pMmNames ) Mem_FlexStop( mng->pMmNames, 0 );
if ( mng->pNtk ) Abc_NtkDelete( mng->pNtk );
if ( mng->pTarget ) Abc_NtkDelete( mng->pTarget );
if ( mng->vNodes ) Vec_PtrFree( mng->vNodes );
if ( mng->vValues ) Vec_IntFree( mng->vValues );
ABC_FREE( mng->pDumpFileName );
ABC_FREE( mng );
Abc_Stop();
}
/**Function*************************************************************
Synopsis [Dumps the original network into the BENCH file.]
Description [This procedure should be modified to dump the target.]
SideEffects []
SeeAlso []
***********************************************************************/
void ABC_Dump_Bench_File( ABC_Manager mng )
{
Abc_Ntk_t * pNtkTemp, * pNtkAig;
const char * pFileName;
// derive the netlist
pNtkAig = Abc_NtkStrash( mng->pNtk, 0, 0, 0 );
pNtkTemp = Abc_NtkToNetlistBench( pNtkAig );
Abc_NtkDelete( pNtkAig );
if ( pNtkTemp == NULL )
{ printf( "ABC_Dump_Bench_File: Dumping BENCH has failed.\n" ); return; }
pFileName = mng->pDumpFileName? mng->pDumpFileName: "abc_test.bench";
Io_WriteBench( pNtkTemp, pFileName );
Abc_NtkDelete( pNtkTemp );
}
/**Function*************************************************************
Synopsis [Gives the current ABC network to AIG manager for processing.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkMiniBalance( Abc_Ntk_t * pNtk )
{
Abc_Ntk_t * pNtkAig;
Hop_Man_t * pMan, * pTemp;
assert( Abc_NtkIsStrash(pNtk) );
// convert to the AIG manager
pMan = Abc_NtkToMini( pNtk );
if ( pMan == NULL )
return NULL;
if ( !Hop_ManCheck( pMan ) )
{
printf( "AIG check has failed.\n" );
Hop_ManStop( pMan );
return NULL;
}
// perform balance
Hop_ManPrintStats( pMan );
// Hop_ManDumpBlif( pMan, "aig_temp.blif" );
pMan = Hop_ManBalance( pTemp = pMan, 1 );
Hop_ManStop( pTemp );
Hop_ManPrintStats( pMan );
// convert from the AIG manager
pNtkAig = Abc_NtkFromMini( pNtk, pMan );
if ( pNtkAig == NULL )
return NULL;
Hop_ManStop( pMan );
// make sure everything is okay
if ( !Abc_NtkCheck( pNtkAig ) )
{
printf( "Abc_NtkStrash: The network check has failed.\n" );
Abc_NtkDelete( pNtkAig );
return NULL;
}
return pNtkAig;
}
/**Function*************************************************************
Synopsis [Reads the network from a BENCH file.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Io_ReadBench( char * pFileName, int fCheck )
{
Extra_FileReader_t * p;
Abc_Ntk_t * pNtk;
// start the file
p = Extra_FileReaderAlloc( pFileName, "#", "\n\r", " \t,()=" );
if ( p == NULL )
return NULL;
// read the network
pNtk = Io_ReadBenchNetwork( p );
Extra_FileReaderFree( p );
if ( pNtk == NULL )
return NULL;
// make sure that everything is okay with the network structure
if ( fCheck && !Abc_NtkCheckRead( pNtk ) )
{
printf( "Io_ReadBench: The network check has failed.\n" );
Abc_NtkDelete( pNtk );
return NULL;
}
return pNtk;
}
/**Function*************************************************************
Synopsis [Derives the miter of two sequential networks.]
Description [Assumes that the networks are strashed.]
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkMiterInt( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int fComb, int nPartSize, int fImplic, int fMulti )
{
char Buffer[1000];
Abc_Ntk_t * pNtkMiter;
assert( Abc_NtkIsStrash(pNtk1) );
assert( Abc_NtkIsStrash(pNtk2) );
// start the new network
pNtkMiter = Abc_NtkAlloc( ABC_NTK_STRASH, ABC_FUNC_AIG, 1 );
sprintf( Buffer, "%s_%s_miter", pNtk1->pName, pNtk2->pName );
pNtkMiter->pName = Extra_UtilStrsav(Buffer);
// perform strashing
Abc_NtkMiterPrepare( pNtk1, pNtk2, pNtkMiter, fComb, nPartSize, fMulti );
Abc_NtkMiterAddOne( pNtk1, pNtkMiter );
Abc_NtkMiterAddOne( pNtk2, pNtkMiter );
Abc_NtkMiterFinalize( pNtk1, pNtk2, pNtkMiter, fComb, nPartSize, fImplic, fMulti );
Abc_AigCleanup((Abc_Aig_t *)pNtkMiter->pManFunc);
// make sure that everything is okay
if ( !Abc_NtkCheck( pNtkMiter ) )
{
printf( "Abc_NtkMiter: The network check has failed.\n" );
Abc_NtkDelete( pNtkMiter );
return NULL;
}
return pNtkMiter;
}
/**Function*************************************************************
Synopsis [Reads the (hierarchical) network from the BLIF file.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Io_ReadBlif( char * pFileName, int fCheck )
{
Io_ReadBlif_t * p;
Abc_Ntk_t * pNtk;
// start the file
p = Io_ReadBlifFile( pFileName );
if ( p == NULL )
return NULL;
// read the hierarchical network
pNtk = Io_ReadBlifNetwork( p );
if ( pNtk == NULL )
{
Io_ReadBlifFree( p );
return NULL;
}
pNtk->pSpec = Extra_UtilStrsav( pFileName );
Abc_NtkTimeInitialize( pNtk, NULL );
Io_ReadBlifFree( p );
// make sure that everything is okay with the network structure
if ( fCheck && !Abc_NtkCheckRead( pNtk ) )
{
printf( "Io_ReadBlif: The network check has failed.\n" );
Abc_NtkDelete( pNtk );
return NULL;
}
return pNtk;
}
/**Function*************************************************************
Synopsis [Interface with the FPGA mapping package.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkFpga( Abc_Ntk_t * pNtk, float DelayTarget, int fRecovery, int fSwitching, int fLatchPaths, int fVerbose )
{
int fShowSwitching = 1;
Abc_Ntk_t * pNtkNew;
Fpga_Man_t * pMan;
Vec_Int_t * vSwitching;
float * pSwitching = NULL;
assert( Abc_NtkIsStrash(pNtk) );
// print a warning about choice nodes
if ( Abc_NtkGetChoiceNum( pNtk ) )
printf( "Performing FPGA mapping with choices.\n" );
// compute switching activity
fShowSwitching |= fSwitching;
if ( fShowSwitching )
{
extern Vec_Int_t * Sim_NtkComputeSwitching( Abc_Ntk_t * pNtk, int nPatterns );
vSwitching = Sim_NtkComputeSwitching( pNtk, 4096 );
pSwitching = (float *)vSwitching->pArray;
}
// perform FPGA mapping
pMan = Abc_NtkToFpga( pNtk, fRecovery, pSwitching, fLatchPaths, fVerbose );
if ( pSwitching ) Vec_IntFree( vSwitching );
if ( pMan == NULL )
return NULL;
Fpga_ManSetSwitching( pMan, fSwitching );
Fpga_ManSetLatchPaths( pMan, fLatchPaths );
Fpga_ManSetLatchNum( pMan, Abc_NtkLatchNum(pNtk) );
Fpga_ManSetDelayTarget( pMan, DelayTarget );
if ( !Fpga_Mapping( pMan ) )
{
Fpga_ManFree( pMan );
return NULL;
}
// transform the result of mapping into a BDD network
pNtkNew = Abc_NtkFromFpga( pMan, pNtk );
if ( pNtkNew == NULL )
return NULL;
Fpga_ManFree( pMan );
// make the network minimum base
Abc_NtkMinimumBase( pNtkNew );
if ( pNtk->pExdc )
pNtkNew->pExdc = Abc_NtkDup( pNtk->pExdc );
// make sure that everything is okay
if ( !Abc_NtkCheck( pNtkNew ) )
{
printf( "Abc_NtkFpga: The network check has failed.\n" );
Abc_NtkDelete( pNtkNew );
return NULL;
}
return pNtkNew;
}
/**Function*************************************************************
Synopsis [Converts the AIG into the netlist.]
Description [This procedure does not copy the choices.]
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkToNetlistBench( Abc_Ntk_t * pNtk )
{
Abc_Ntk_t * pNtkNew, * pNtkTemp;
assert( Abc_NtkIsStrash(pNtk) );
pNtkTemp = Abc_NtkAigToLogicSopBench( pNtk );
pNtkNew = Abc_NtkLogicToNetlist( pNtkTemp );
Abc_NtkDelete( pNtkTemp );
return pNtkNew;
}
/**Function*************************************************************
Synopsis [Derives the miter of two networks.]
Description [Preprocesses the networks to make sure that they are strashed.]
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkMiter( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int fComb, int nPartSize, int fImplic, int fMulti )
{
Abc_Ntk_t * pTemp = NULL;
int fRemove1, fRemove2;
assert( Abc_NtkHasOnlyLatchBoxes(pNtk1) );
assert( Abc_NtkHasOnlyLatchBoxes(pNtk2) );
// check that the networks have the same PIs/POs/latches
if ( !Abc_NtkCompareSignals( pNtk1, pNtk2, 0, fComb ) )
return NULL;
// make sure the circuits are strashed
fRemove1 = (!Abc_NtkIsStrash(pNtk1) || Abc_NtkGetChoiceNum(pNtk1)) && (pNtk1 = Abc_NtkStrash(pNtk1, 0, 0, 0));
fRemove2 = (!Abc_NtkIsStrash(pNtk2) || Abc_NtkGetChoiceNum(pNtk2)) && (pNtk2 = Abc_NtkStrash(pNtk2, 0, 0, 0));
if ( pNtk1 && pNtk2 )
pTemp = Abc_NtkMiterInt( pNtk1, pNtk2, fComb, nPartSize, fImplic, fMulti );
if ( fRemove1 ) Abc_NtkDelete( pNtk1 );
if ( fRemove2 ) Abc_NtkDelete( pNtk2 );
return pTemp;
}
/**Function*************************************************************
Synopsis [Transforms the AIG into nodes.]
Description [Threhold is the max number of nodes duplicated at a node.]
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkMulti( Abc_Ntk_t * pNtk, int nThresh, int nFaninMax, int fCnf, int fMulti, int fSimple, int fFactor )
{
Abc_Ntk_t * pNtkNew;
assert( Abc_NtkIsStrash(pNtk) );
assert( nThresh >= 0 );
assert( nFaninMax > 1 );
// print a warning about choice nodes
if ( Abc_NtkGetChoiceNum( pNtk ) )
printf( "Warning: The choice nodes in the AIG are removed by renoding.\n" );
// define the boundary
if ( fCnf )
Abc_NtkMultiSetBoundsCnf( pNtk );
else if ( fMulti )
Abc_NtkMultiSetBoundsMulti( pNtk, nThresh );
else if ( fSimple )
Abc_NtkMultiSetBoundsSimple( pNtk );
else if ( fFactor )
Abc_NtkMultiSetBoundsFactor( pNtk );
else
Abc_NtkMultiSetBounds( pNtk, nThresh, nFaninMax );
// perform renoding for this boundary
pNtkNew = Abc_NtkStartFrom( pNtk, ABC_NTK_LOGIC, ABC_FUNC_BDD );
Abc_NtkMultiInt( pNtk, pNtkNew );
Abc_NtkFinalize( pNtk, pNtkNew );
// make the network minimum base
Abc_NtkMinimumBase( pNtkNew );
// fix the problem with complemented and duplicated CO edges
Abc_NtkLogicMakeSimpleCos( pNtkNew, 0 );
// report the number of CNF objects
if ( fCnf )
{
// int nClauses = Abc_NtkGetClauseNum(pNtkNew) + 2*Abc_NtkPoNum(pNtkNew) + 2*Abc_NtkLatchNum(pNtkNew);
// printf( "CNF variables = %d. CNF clauses = %d.\n", Abc_NtkNodeNum(pNtkNew), nClauses );
}
//printf( "Maximum fanin = %d.\n", Abc_NtkGetFaninMax(pNtkNew) );
if ( pNtk->pExdc )
pNtkNew->pExdc = Abc_NtkDup( pNtk->pExdc );
// make sure everything is okay
if ( !Abc_NtkCheck( pNtkNew ) )
{
printf( "Abc_NtkMulti: The network check has failed.\n" );
Abc_NtkDelete( pNtkNew );
return NULL;
}
return pNtkNew;
}
/**Function*************************************************************
Synopsis [Interface with the mapping package.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkSuperChoice( Abc_Ntk_t * pNtk )
{
Abc_Ntk_t * pNtkNew;
Map_Man_t * pMan;
assert( Abc_NtkIsStrash(pNtk) );
// check that the library is available
if ( Abc_FrameReadLibGen() == NULL )
{
printf( "The current library is not available.\n" );
return 0;
}
// derive the supergate library
if ( Abc_FrameReadLibSuper() == NULL && Abc_FrameReadLibGen() )
{
// printf( "A simple supergate library is derived from gate library \"%s\".\n",
// Mio_LibraryReadName((Mio_Library_t *)Abc_FrameReadLibGen()) );
Map_SuperLibDeriveFromGenlib( (Mio_Library_t *)Abc_FrameReadLibGen(), 0 );
}
// print a warning about choice nodes
if ( Abc_NtkGetChoiceNum( pNtk ) )
printf( "Performing mapping with choices.\n" );
// perform the mapping
pMan = Abc_NtkToMap( pNtk, -1, 1, NULL, 0 );
if ( pMan == NULL )
return NULL;
if ( !Map_Mapping( pMan ) )
{
Map_ManFree( pMan );
return NULL;
}
// reconstruct the network after mapping
pNtkNew = Abc_NtkFromMapSuperChoice( pMan, pNtk );
if ( pNtkNew == NULL )
return NULL;
Map_ManFree( pMan );
// make sure that everything is okay
if ( !Abc_NtkCheck( pNtkNew ) )
{
printf( "Abc_NtkMap: The network check has failed.\n" );
Abc_NtkDelete( pNtkNew );
return NULL;
}
return pNtkNew;
}
/**Function*************************************************************
Synopsis [Write the network into a BLIF file with the given name.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Io_WriteBlifLogic( Abc_Ntk_t * pNtk, char * FileName, int fWriteLatches )
{
Abc_Ntk_t * pNtkTemp;
// derive the netlist
pNtkTemp = Abc_NtkToNetlist(pNtk);
if ( pNtkTemp == NULL )
{
fprintf( stdout, "Writing BLIF has failed.\n" );
return;
}
Io_WriteBlif( pNtkTemp, FileName, fWriteLatches, 0, 0 );
Abc_NtkDelete( pNtkTemp );
}
/**Function*************************************************************
Synopsis [Transform the logic network into a netlist.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkToNetlist( Abc_Ntk_t * pNtk )
{
Abc_Ntk_t * pNtkNew, * pNtkTemp;
assert( Abc_NtkIsLogic(pNtk) || Abc_NtkIsStrash(pNtk) );
if ( Abc_NtkIsStrash(pNtk) )
{
pNtkTemp = Abc_NtkAigToLogicSop(pNtk);
pNtkNew = Abc_NtkLogicToNetlist( pNtkTemp );
Abc_NtkDelete( pNtkTemp );
return pNtkNew;
}
return Abc_NtkLogicToNetlist( pNtk );
}
/**Function*************************************************************
Synopsis [Initialize the solver internal data structure.]
Description [Prepares the solver to work on one specific target
set by calling ABC_AddTarget before.]
SideEffects []
SeeAlso []
***********************************************************************/
void ABC_SolveInit( ABC_Manager mng )
{
// check if the target is available
assert( mng->nog == Vec_PtrSize(mng->vNodes) );
if ( mng->nog == 0 )
{ printf( "ABC_SolveInit: Target is not specified by ABC_AddTarget().\n" ); return; }
// free the previous target network if present
if ( mng->pTarget ) Abc_NtkDelete( mng->pTarget );
// set the new target network
// mng->pTarget = Abc_NtkCreateTarget( mng->pNtk, mng->vNodes, mng->vValues );
mng->pTarget = Abc_NtkStrash( mng->pNtk, 0, 1, 0 );
}
/**Function*************************************************************
Synopsis [Performs retiming in one direction.]
Description [Currently does not retime over black boxes.]
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkRetimeIncremental( Abc_Ntk_t * pNtk, int nDelayLim, int fForward, int fMinDelay, int fOneStep, int fVerbose )
{
Abc_Ntk_t * pNtkCopy = NULL;
Vec_Ptr_t * vBoxes;
st__table * tLatches;
int nLatches = Abc_NtkLatchNum(pNtk);
int nIdMaxStart = Abc_NtkObjNumMax(pNtk);
int RetValue;
int nIterLimit = -1; // Suppress "might be used uninitialized"
if ( Abc_NtkNodeNum(pNtk) == 0 )
return 0;
// reorder CI/CO/latch inputs
Abc_NtkOrderCisCos( pNtk );
if ( fMinDelay )
{
nIterLimit = fOneStep? 1 : 2 * Abc_NtkLevel(pNtk);
pNtkCopy = Abc_NtkDup( pNtk );
tLatches = Abc_NtkRetimePrepareLatches( pNtkCopy );
st__free_table( tLatches );
}
// collect latches and remove CIs/COs
tLatches = Abc_NtkRetimePrepareLatches( pNtk );
// share the latches
Abc_NtkRetimeShareLatches( pNtk, 0 );
// save boxes
vBoxes = pNtk->vBoxes; pNtk->vBoxes = NULL;
// perform the retiming
if ( fMinDelay )
Abc_NtkRetimeMinDelay( pNtk, pNtkCopy, nDelayLim, nIterLimit, fForward, fVerbose );
else
Abc_NtkRetimeOneWay( pNtk, fForward, fVerbose );
if ( fMinDelay )
Abc_NtkDelete( pNtkCopy );
// share the latches
Abc_NtkRetimeShareLatches( pNtk, 0 );
// restore boxes
pNtk->vBoxes = vBoxes;
// finalize the latches
RetValue = Abc_NtkRetimeFinalizeLatches( pNtk, tLatches, nIdMaxStart );
st__free_table( tLatches );
if ( RetValue == 0 )
return 0;
// fix the COs
// Abc_NtkLogicMakeSimpleCos( pNtk, 0 );
// check for correctness
if ( !Abc_NtkCheck( pNtk ) )
fprintf( stdout, "Abc_NtkRetimeForward(): Network check has failed.\n" );
// return the number of latches saved
return nLatches - Abc_NtkLatchNum(pNtk);
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_FrameDeleteAllNetworks( Abc_Frame_t * p )
{
Abc_Ntk_t * pNtk, * pNtk2;
// delete all the currently saved networks
for ( pNtk = p->pNtkCur,
pNtk2 = pNtk? Abc_NtkBackup(pNtk): NULL;
pNtk;
pNtk = pNtk2,
pNtk2 = pNtk? Abc_NtkBackup(pNtk): NULL )
Abc_NtkDelete( pNtk );
// set the current network empty
p->pNtkCur = NULL;
// fprintf( p->Out, "All networks have been deleted.\n" );
}
/**Function*************************************************************
Synopsis [Replaces the current network by the given one.]
Description [This procedure does not modify the stack of saved
networks.]
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_FrameReplaceCurrentNetwork( Abc_Frame_t * p, Abc_Ntk_t * pNtk )
{
if ( pNtk == NULL )
return;
// transfer the parameters to the new network
if ( p->pNtkCur && Abc_FrameIsFlagEnabled( "backup" ) )
{
Abc_NtkSetBackup( pNtk, Abc_NtkBackup(p->pNtkCur) );
Abc_NtkSetStep( pNtk, Abc_NtkStep(p->pNtkCur) );
// delete the current network
Abc_NtkDelete( p->pNtkCur );
}
else
{
Abc_NtkSetBackup( pNtk, NULL );
Abc_NtkSetStep( pNtk, ++p->nSteps );
// delete the current network if present but backup is disabled
if ( p->pNtkCur )
Abc_NtkDelete( p->pNtkCur );
}
// set the new current network
p->pNtkCur = pNtk;
}
/**Function*************************************************************
Synopsis [Creates the network isomorphic to the union of local BDDs of the nodes.]
Description [The nodes of the local BDDs are converted into the network nodes
with logic functions equal to the MUX.]
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkBddToMuxes( Abc_Ntk_t * pNtk )
{
Abc_Ntk_t * pNtkNew;
assert( Abc_NtkIsBddLogic(pNtk) );
pNtkNew = Abc_NtkStartFrom( pNtk, ABC_NTK_LOGIC, ABC_FUNC_SOP );
Abc_NtkBddToMuxesPerform( pNtk, pNtkNew );
Abc_NtkFinalize( pNtk, pNtkNew );
// make sure everything is okay
if ( !Abc_NtkCheck( pNtkNew ) )
{
printf( "Abc_NtkBddToMuxes: The network check has failed.\n" );
Abc_NtkDelete( pNtkNew );
return NULL;
}
return pNtkNew;
}
Abc_Ntk_t * Abc_NtkFromMiniAig( Mini_Aig_t * p )
{
Abc_Ntk_t * pNtk;
Abc_Obj_t * pObj;
Vec_Int_t * vCopies;
int i, nNodes;
// get the number of nodes
nNodes = Mini_AigNodeNum(p);
// create ABC network
pNtk = Abc_NtkAlloc( ABC_NTK_STRASH, ABC_FUNC_AIG, 1 );
pNtk->pName = Abc_UtilStrsav( "MiniAig" );
// create mapping from MiniAIG objects into ABC objects
vCopies = Vec_IntAlloc( nNodes );
Vec_IntPush( vCopies, Abc_LitNot(Abc_ObjToLit(Abc_AigConst1(pNtk))) );
// iterate through the objects
for ( i = 1; i < nNodes; i++ )
{
if ( Mini_AigNodeIsPi( p, i ) )
pObj = Abc_NtkCreatePi(pNtk);
else if ( Mini_AigNodeIsPo( p, i ) )
Abc_ObjAddFanin( (pObj = Abc_NtkCreatePo(pNtk)), Abc_NodeFanin0Copy(pNtk, vCopies, p, i) );
else if ( Mini_AigNodeIsAnd( p, i ) )
pObj = Abc_AigAnd((Abc_Aig_t *)pNtk->pManFunc, Abc_NodeFanin0Copy(pNtk, vCopies, p, i), Abc_NodeFanin1Copy(pNtk, vCopies, p, i));
else assert( 0 );
Vec_IntPush( vCopies, Abc_ObjToLit(pObj) );
}
assert( Vec_IntSize(vCopies) == nNodes );
Abc_AigCleanup( (Abc_Aig_t *)pNtk->pManFunc );
Vec_IntFree( vCopies );
Abc_NtkAddDummyPiNames( pNtk );
Abc_NtkAddDummyPoNames( pNtk );
if ( !Abc_NtkCheck( pNtk ) )
fprintf( stdout, "Abc_NtkFromMini(): Network check has failed.\n" );
// add latches
if ( Mini_AigRegNum(p) > 0 )
{
extern Abc_Ntk_t * Abc_NtkRestrashWithLatches( Abc_Ntk_t * pNtk, int nLatches );
Abc_Ntk_t * pTemp;
pNtk = Abc_NtkRestrashWithLatches( pTemp = pNtk, Mini_AigRegNum(p) );
Abc_NtkDelete( pTemp );
}
return pNtk;
}
/**Function*************************************************************
Synopsis [Testing the above code.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkMiniAigTest( Abc_Ntk_t * pNtk )
{
Abc_Ntk_t * pNtkNew;
Mini_Aig_t * p;
p = Abc_NtkToMiniAig( pNtk );
pNtkNew = Abc_NtkFromMiniAig( p );
Mini_AigStop( p );
Abc_NtkPrintStats( pNtkNew, 0, 0, 0, 0, 0, 0, 0, 0, 0 );
Abc_NtkDelete( pNtkNew );
// test dumping
p = Abc_NtkToMiniAig( pNtk );
Mini_AigDump( p, "miniaig.data" );
Mini_AigPrintStats( p );
Mini_AigStop( p );
p = Mini_AigLoad( "miniaig.data" );
Mini_AigPrintStats( p );
Mini_AigStop( p );
}
/**Function*************************************************************
Synopsis [Solves the targets added by ABC_AddTarget().]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
enum CSAT_StatusT ABC_Solve( ABC_Manager mng )
{
Prove_Params_t * pParams = &mng->Params;
int RetValue, i;
// check if the target network is available
if ( mng->pTarget == NULL )
{ printf( "ABC_Solve: Target network is not derived by ABC_SolveInit().\n" ); return UNDETERMINED; }
// try to prove the miter using a number of techniques
if ( mng->mode )
RetValue = Abc_NtkMiterSat( mng->pTarget, (ABC_INT64_T)pParams->nMiteringLimitLast, (ABC_INT64_T)0, 0, NULL, NULL );
else
// RetValue = Abc_NtkMiterProve( &mng->pTarget, pParams ); // old CEC engine
RetValue = Abc_NtkIvyProve( &mng->pTarget, pParams ); // new CEC engine
// analyze the result
mng->pResult = ABC_TargetResAlloc( Abc_NtkCiNum(mng->pTarget) );
if ( RetValue == -1 )
mng->pResult->status = UNDETERMINED;
else if ( RetValue == 1 )
mng->pResult->status = UNSATISFIABLE;
else if ( RetValue == 0 )
{
mng->pResult->status = SATISFIABLE;
// create the array of PI names and values
for ( i = 0; i < mng->pResult->no_sig; i++ )
{
mng->pResult->names[i] = Extra_UtilStrsav( ABC_GetNodeName(mng, Abc_NtkCi(mng->pNtk, i)) );
mng->pResult->values[i] = mng->pTarget->pModel[i];
}
ABC_FREE( mng->pTarget->pModel );
}
else assert( 0 );
// delete the target
Abc_NtkDelete( mng->pTarget );
mng->pTarget = NULL;
// return the status
return mng->pResult->status;
}
/**Function*************************************************************
Synopsis [Sets the given network to be the current one.]
Description [Takes the network and makes it the current network.
The previous current network is attached to the given network as
a backup copy. In the stack of backup networks contains too many
networks (defined by the paramater "savesteps"), the bottom
most network is deleted.]
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_FrameSetCurrentNetwork( Abc_Frame_t * p, Abc_Ntk_t * pNtkNew )
{
Abc_Ntk_t * pNtk, * pNtk2, * pNtk3;
int nNetsPresent;
int nNetsToSave;
char * pValue;
// link it to the previous network
Abc_NtkSetBackup( pNtkNew, p->pNtkCur );
// set the step of this network
Abc_NtkSetStep( pNtkNew, ++p->nSteps );
// set this network to be the current network
p->pNtkCur = pNtkNew;
// remove any extra network that may happen to be in the stack
pValue = Cmd_FlagReadByName( p, "savesteps" );
// if the value of steps to save is not set, assume 1-level undo
if ( pValue == NULL )
nNetsToSave = 1;
else
nNetsToSave = atoi(pValue);
// count the network, remember the last one, and the one before the last one
nNetsPresent = 0;
pNtk2 = pNtk3 = NULL;
for ( pNtk = p->pNtkCur; pNtk; pNtk = Abc_NtkBackup(pNtk2) )
{
nNetsPresent++;
pNtk3 = pNtk2;
pNtk2 = pNtk;
}
// remove the earliest backup network if it is more steps away than we store
if ( nNetsPresent - 1 > nNetsToSave )
{ // delete the last network
Abc_NtkDelete( pNtk2 );
// clean the pointer of the network before the last one
Abc_NtkSetBackup( pNtk3, NULL );
}
}
/**Function*************************************************************
Synopsis [Creates the mapped network.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkFromMapSuperChoice( Map_Man_t * pMan, Abc_Ntk_t * pNtk )
{
extern Abc_Ntk_t * Abc_NtkMulti( Abc_Ntk_t * pNtk, int nThresh, int nFaninMax, int fCnf, int fMulti, int fSimple, int fFactor );
ProgressBar * pProgress;
Abc_Ntk_t * pNtkNew, * pNtkNew2;
Abc_Obj_t * pNode;
int i;
// save the pointer to the mapped nodes
Abc_NtkForEachCi( pNtk, pNode, i )
pNode->pNext = pNode->pCopy;
Abc_NtkForEachPo( pNtk, pNode, i )
pNode->pNext = pNode->pCopy;
Abc_NtkForEachNode( pNtk, pNode, i )
pNode->pNext = pNode->pCopy;
// duplicate the network
pNtkNew2 = Abc_NtkDup( pNtk );
pNtkNew = Abc_NtkMulti( pNtkNew2, 0, 20, 0, 0, 1, 0 );
if ( !Abc_NtkBddToSop( pNtkNew, -1, ABC_INFINITY ) )
{
printf( "Abc_NtkFromMapSuperChoice(): Converting to SOPs has failed.\n" );
return NULL;
}
// set the old network to point to the new network
Abc_NtkForEachCi( pNtk, pNode, i )
pNode->pCopy = pNode->pCopy->pCopy;
Abc_NtkForEachPo( pNtk, pNode, i )
pNode->pCopy = pNode->pCopy->pCopy;
Abc_NtkForEachNode( pNtk, pNode, i )
pNode->pCopy = pNode->pCopy->pCopy;
Abc_NtkDelete( pNtkNew2 );
// set the pointers from the mapper to the new nodes
Abc_NtkForEachCi( pNtk, pNode, i )
{
Map_NodeSetData( Map_ManReadInputs(pMan)[i], 0, (char *)Abc_NtkCreateNodeInv(pNtkNew,pNode->pCopy) );
Map_NodeSetData( Map_ManReadInputs(pMan)[i], 1, (char *)pNode->pCopy );
}
/**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 [Prepares the IVY package.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkIvyAfter( Abc_Ntk_t * pNtk, Ivy_Man_t * pMan, int fSeq, int fHaig )
{
Abc_Ntk_t * pNtkAig;
int nNodes, fCleanup = 1;
// convert from the AIG manager
if ( fSeq )
pNtkAig = Abc_NtkFromIvySeq( pNtk, pMan, fHaig );
else
pNtkAig = Abc_NtkFromIvy( pNtk, pMan );
// report the cleanup results
if ( !fHaig && fCleanup && (nNodes = Abc_AigCleanup(pNtkAig->pManFunc)) )
printf( "Warning: AIG cleanup removed %d nodes (this is not a bug).\n", nNodes );
// duplicate EXDC
if ( pNtk->pExdc )
pNtkAig->pExdc = Abc_NtkDup( pNtk->pExdc );
// make sure everything is okay
if ( !Abc_NtkCheck( pNtkAig ) )
{
printf( "Abc_NtkStrash: The network check has failed.\n" );
Abc_NtkDelete( pNtkAig );
return NULL;
}
return pNtkAig;
}
