Example #1
0
/**Function*************************************************************

  Synopsis    []

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
Abc_Ntk_t * Io_ReadBenchNetwork( Extra_FileReader_t * p )
{
    ProgressBar * pProgress;
    Vec_Ptr_t * vTokens;
    Abc_Ntk_t * pNtk;
    Abc_Obj_t * pNode, * pNet;
    Vec_Str_t * vString;
    unsigned uTruth[8];
    char * pType, ** ppNames, * pString;
    int iLine, nNames, nDigits, fLutsPresent = 0;
    
    // allocate the empty network
    pNtk = Abc_NtkStartRead( Extra_FileReaderGetFileName(p) );

    // go through the lines of the file
    vString = Vec_StrAlloc( 100 );
    pProgress = Extra_ProgressBarStart( stdout, Extra_FileReaderGetFileSize(p) );
    for ( iLine = 0; (vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p)); iLine++ )
    {
        Extra_ProgressBarUpdate( pProgress, Extra_FileReaderGetCurPosition(p), NULL );

        if ( vTokens->nSize == 1 )
        {
            printf( "%s: Wrong input file format.\n", Extra_FileReaderGetFileName(p) );
            Vec_StrFree( vString );
            Abc_NtkDelete( pNtk );
            return NULL;
        }

        // get the type of the line
        if ( strncmp( (char *)vTokens->pArray[0], "INPUT", 5 ) == 0 )
            Io_ReadCreatePi( pNtk, (char *)vTokens->pArray[1] );
        else if ( strncmp( (char *)vTokens->pArray[0], "OUTPUT", 5 ) == 0 )
            Io_ReadCreatePo( pNtk, (char *)vTokens->pArray[1] );
        else 
        {
            // get the node name and the node type
            pType = (char *)vTokens->pArray[1];
            if ( strncmp(pType, "DFF", 3) == 0 ) // works for both DFF and DFFRSE
            {
                pNode = Io_ReadCreateLatch( pNtk, (char *)vTokens->pArray[2], (char *)vTokens->pArray[0] );
//                Abc_LatchSetInit0( pNode );
                if ( pType[3] == '0' )
                    Abc_LatchSetInit0( pNode );
                else if ( pType[3] == '1' )
                    Abc_LatchSetInit1( pNode );
                else
                    Abc_LatchSetInitDc( pNode );
            }
            else if ( strcmp(pType, "LUT") == 0 )
            {
                fLutsPresent = 1;
                ppNames = (char **)vTokens->pArray + 3;
                nNames  = vTokens->nSize - 3;
                // check the number of inputs
                if ( nNames > 8 )
                {
                    printf( "%s: Currently cannot read truth tables with more than 8 inputs (%d).\n", Extra_FileReaderGetFileName(p), nNames );
                    Vec_StrFree( vString );
                    Abc_NtkDelete( pNtk );
                    return NULL;
                }
                // get the hex string
                pString = (char *)vTokens->pArray[2];
                if ( strncmp( pString, "0x", 2 ) )
                {
                    printf( "%s: The LUT signature (%s) does not look like a hexadecimal beginning with \"0x\".\n", Extra_FileReaderGetFileName(p), pString );
                    Vec_StrFree( vString );
                    Abc_NtkDelete( pNtk );
                    return NULL;
                }
                pString += 2;
                // pad the string with zero's if needed
                nDigits = (1 << nNames) / 4;
                if ( nDigits == 0 )
                    nDigits = 1;
                if ( strlen(pString) < (unsigned)nDigits )
                {
                    Vec_StrFill( vString, nDigits - strlen(pString), '0' );
                    Vec_StrPrintStr( vString, pString );
                    Vec_StrPush( vString, 0 );
                    pString = Vec_StrArray( vString );
                }
                // read the hex number from the string
                if ( !Extra_ReadHexadecimal( uTruth, pString, nNames ) )
                {
                    printf( "%s: Reading hexadecimal number (%s) has failed.\n", Extra_FileReaderGetFileName(p), pString );
                    Vec_StrFree( vString );
                    Abc_NtkDelete( pNtk );
                    return NULL;
                }
                // check if the node is a constant node
                if ( Extra_TruthIsConst0(uTruth, nNames) )
                {
                    pNode = Io_ReadCreateNode( pNtk, (char *)vTokens->pArray[0], ppNames, 0 );
                    Abc_ObjSetData( pNode, Abc_SopRegister( (Mem_Flex_t *)pNtk->pManFunc, " 0\n" ) );
                }
                else if ( Extra_TruthIsConst1(uTruth, nNames) )
                {
                    pNode = Io_ReadCreateNode( pNtk, (char *)vTokens->pArray[0], ppNames, 0 );
                    Abc_ObjSetData( pNode, Abc_SopRegister( (Mem_Flex_t *)pNtk->pManFunc, " 1\n" ) );
                }
                else
                {
                    // create the node
                    pNode = Io_ReadCreateNode( pNtk, (char *)vTokens->pArray[0], ppNames, nNames );
                    assert( nNames > 0 );
                    if ( nNames > 1 )
                        Abc_ObjSetData( pNode, Abc_SopCreateFromTruth((Mem_Flex_t *)pNtk->pManFunc, nNames, uTruth) );
                    else if ( pString[0] == '2' )
                        Abc_ObjSetData( pNode, Abc_SopCreateBuf((Mem_Flex_t *)pNtk->pManFunc) );
                    else if ( pString[0] == '1' )
                        Abc_ObjSetData( pNode, Abc_SopCreateInv((Mem_Flex_t *)pNtk->pManFunc) );
                    else
                    {
                        printf( "%s: Reading truth table (%s) of single-input node has failed.\n", Extra_FileReaderGetFileName(p), pString );
                        Vec_StrFree( vString );
                        Abc_NtkDelete( pNtk );
                        return NULL;
                    }
                }
            }
            else
            {
                // create a new node and add it to the network
                ppNames = (char **)vTokens->pArray + 2;
                nNames  = vTokens->nSize - 2;
                pNode = Io_ReadCreateNode( pNtk, (char *)vTokens->pArray[0], ppNames, nNames );
                // assign the cover
                if ( strcmp(pType, "AND") == 0 )
                    Abc_ObjSetData( pNode, Abc_SopCreateAnd((Mem_Flex_t *)pNtk->pManFunc, nNames, NULL) );
                else if ( strcmp(pType, "OR") == 0 )
                    Abc_ObjSetData( pNode, Abc_SopCreateOr((Mem_Flex_t *)pNtk->pManFunc, nNames, NULL) );
                else if ( strcmp(pType, "NAND") == 0 )
                    Abc_ObjSetData( pNode, Abc_SopCreateNand((Mem_Flex_t *)pNtk->pManFunc, nNames) );
                else if ( strcmp(pType, "NOR") == 0 )
                    Abc_ObjSetData( pNode, Abc_SopCreateNor((Mem_Flex_t *)pNtk->pManFunc, nNames) );
                else if ( strcmp(pType, "XOR") == 0 )
                    Abc_ObjSetData( pNode, Abc_SopCreateXor((Mem_Flex_t *)pNtk->pManFunc, nNames) );
                else if ( strcmp(pType, "NXOR") == 0 || strcmp(pType, "XNOR") == 0 )
                    Abc_ObjSetData( pNode, Abc_SopCreateNxor((Mem_Flex_t *)pNtk->pManFunc, nNames) );
                else if ( strncmp(pType, "BUF", 3) == 0 )
                    Abc_ObjSetData( pNode, Abc_SopCreateBuf((Mem_Flex_t *)pNtk->pManFunc) );
                else if ( strcmp(pType, "NOT") == 0 )
                    Abc_ObjSetData( pNode, Abc_SopCreateInv((Mem_Flex_t *)pNtk->pManFunc) );
                else if ( strncmp(pType, "MUX", 3) == 0 )
//                    Abc_ObjSetData( pNode, Abc_SopRegister(pNtk->pManFunc, "1-0 1\n-11 1\n") );
                    Abc_ObjSetData( pNode, Abc_SopRegister((Mem_Flex_t *)pNtk->pManFunc, "0-1 1\n11- 1\n") );
                else if ( strncmp(pType, "gnd", 3) == 0 )
                    Abc_ObjSetData( pNode, Abc_SopRegister( (Mem_Flex_t *)pNtk->pManFunc, " 0\n" ) );
                else if ( strncmp(pType, "vdd", 3) == 0 )
                    Abc_ObjSetData( pNode, Abc_SopRegister( (Mem_Flex_t *)pNtk->pManFunc, " 1\n" ) );
                else
                {
                    printf( "Io_ReadBenchNetwork(): Cannot determine gate type \"%s\" in line %d.\n", pType, Extra_FileReaderGetLineNumber(p, 0) );
                    Vec_StrFree( vString );
                    Abc_NtkDelete( pNtk );
                    return NULL;
                }
            }
        }
    }
    Extra_ProgressBarStop( pProgress );
    Vec_StrFree( vString );

    // check if constant 0 is present
    if ( (pNet = Abc_NtkFindNet( pNtk, "gnd" )) )
    {
        if ( Abc_ObjFaninNum(pNet) == 0 )
            Io_ReadCreateConst( pNtk, "gnd", 0 );
    }
    if ( (pNet = Abc_NtkFindNet( pNtk, "1" )) )
    {
        if ( Abc_ObjFaninNum(pNet) == 0 )
        {
            printf( "Io_ReadBenchNetwork(): Adding constant 0 fanin to non-driven net \"1\".\n" );
            Io_ReadCreateConst( pNtk, "1", 0 );
        }
    }
    // check if constant 1 is present
    if ( (pNet = Abc_NtkFindNet( pNtk, "vdd" )) )
    {
        if ( Abc_ObjFaninNum(pNet) == 0 )
            Io_ReadCreateConst( pNtk, "vdd", 1 );
    }
    if ( (pNet = Abc_NtkFindNet( pNtk, "2" )) )
    {
        if ( Abc_ObjFaninNum(pNet) == 0 )
        {
            printf( "Io_ReadBenchNetwork(): Adding constant 1 fanin to non-driven net \"2\".\n" );
            Io_ReadCreateConst( pNtk, "2", 1 );
        }
    }

    Abc_NtkFinalizeRead( pNtk );

    // if LUTs are present, collapse the truth tables into cubes
    if ( fLutsPresent )
    {
        if ( !Abc_NtkToBdd(pNtk) )
        {
            printf( "Io_ReadBenchNetwork(): Converting to BDD has failed.\n" );
            Abc_NtkDelete( pNtk );
            return NULL;
        }
        if ( !Abc_NtkToSop(pNtk, 0) )
        {
            printf( "Io_ReadBenchNetwork(): Converting to SOP has failed.\n" );
            Abc_NtkDelete( pNtk );
            return NULL;
        }
    }
    return pNtk;
}
/**Function*************************************************************

  Synopsis    []

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
Abc_Ntk_t * Io_ReadPlaNetwork( Extra_FileReader_t * p )
{
    ProgressBar * pProgress;
    Vec_Ptr_t * vTokens;
    Abc_Ntk_t * pNtk;
    Abc_Obj_t * pTermPi, * pTermPo, * pNode;
    Vec_Str_t ** ppSops;
    char Buffer[100];
    int nInputs = -1, nOutputs = -1, nProducts = -1;
    char * pCubeIn, * pCubeOut;
    int i, k, iLine, nDigits, nCubes;
 
    // allocate the empty network
    pNtk = Abc_NtkStartRead( Extra_FileReaderGetFileName(p) );

    // go through the lines of the file
    nCubes = 0;
    pProgress = Extra_ProgressBarStart( stdout, Extra_FileReaderGetFileSize(p) );
    for ( iLine = 0; vTokens = Extra_FileReaderGetTokens(p); iLine++ )
    {
        Extra_ProgressBarUpdate( pProgress, Extra_FileReaderGetCurPosition(p), NULL );

        // if it is the end of file, quit the loop
        if ( strcmp( vTokens->pArray[0], ".e" ) == 0 )
            break;

        if ( vTokens->nSize == 1 )
        {
            printf( "%s (line %d): Wrong number of token.\n", 
                Extra_FileReaderGetFileName(p), iLine+1 );
            Abc_NtkDelete( pNtk );
            return NULL;
        }

        if ( strcmp( vTokens->pArray[0], ".i" ) == 0 )
            nInputs = atoi(vTokens->pArray[1]);
        else if ( strcmp( vTokens->pArray[0], ".o" ) == 0 )
            nOutputs = atoi(vTokens->pArray[1]);
        else if ( strcmp( vTokens->pArray[0], ".p" ) == 0 )
            nProducts = atoi(vTokens->pArray[1]);
        else if ( strcmp( vTokens->pArray[0], ".ilb" ) == 0 )
        {
            if ( vTokens->nSize - 1 != nInputs )
                printf( "Warning: Mismatch between the number of PIs on the .i line (%d) and the number of PIs on the .ilb line (%d).\n", nInputs, vTokens->nSize - 1 );
            for ( i = 1; i < vTokens->nSize; i++ )
                Io_ReadCreatePi( pNtk, vTokens->pArray[i] );
        }
        else if ( strcmp( vTokens->pArray[0], ".ob" ) == 0 )
        {
            if ( vTokens->nSize - 1 != nOutputs )
                printf( "Warning: Mismatch between the number of POs on the .o line (%d) and the number of POs on the .ob line (%d).\n", nOutputs, vTokens->nSize - 1 );
            for ( i = 1; i < vTokens->nSize; i++ )
                Io_ReadCreatePo( pNtk, vTokens->pArray[i] );
        }
        else 
        {
            // check if the input/output names are given
            if ( Abc_NtkPiNum(pNtk) == 0 )
            {
                if ( nInputs == -1 )
                {
                    printf( "%s: The number of inputs is not specified.\n", Extra_FileReaderGetFileName(p) );
                    Abc_NtkDelete( pNtk );
                    return NULL;
                }
                nDigits = Extra_Base10Log( nInputs );
                for ( i = 0; i < nInputs; i++ )
                {
                    sprintf( Buffer, "x%0*d", nDigits, i );
                    Io_ReadCreatePi( pNtk, Buffer );
                }
            }
            if ( Abc_NtkPoNum(pNtk) == 0 )
            {
                if ( nOutputs == -1 )
                {
                    printf( "%s: The number of outputs is not specified.\n", Extra_FileReaderGetFileName(p) );
                    Abc_NtkDelete( pNtk );
                    return NULL;
                }
                nDigits = Extra_Base10Log( nOutputs );
                for ( i = 0; i < nOutputs; i++ )
                {
                    sprintf( Buffer, "z%0*d", nDigits, i );
                    Io_ReadCreatePo( pNtk, Buffer );
                }
            }
            if ( Abc_NtkNodeNum(pNtk) == 0 )
            { // first time here
                // create the PO drivers and add them
                // start the SOP covers
                ppSops = ALLOC( Vec_Str_t *, nOutputs );
                Abc_NtkForEachPo( pNtk, pTermPo, i )
                {
                    ppSops[i] = Vec_StrAlloc( 100 );
                    // create the node
                    pNode = Abc_NtkCreateNode(pNtk);
                    // connect the node to the PO net
                    Abc_ObjAddFanin( Abc_ObjFanin0Ntk(pTermPo), pNode );
                    // connect the node to the PI nets
                    Abc_NtkForEachPi( pNtk, pTermPi, k )
                        Abc_ObjAddFanin( pNode, Abc_ObjFanout0Ntk(pTermPi) );
                }
            }
            // read the cubes
            if ( vTokens->nSize != 2 )
            {
                printf( "%s (line %d): Input and output cubes are not specified.\n", 
                    Extra_FileReaderGetFileName(p), iLine+1 );
                Abc_NtkDelete( pNtk );
                return NULL;
            }
            pCubeIn  = vTokens->pArray[0];
            pCubeOut = vTokens->pArray[1];
            if ( strlen(pCubeIn) != (unsigned)nInputs )
            {
                printf( "%s (line %d): Input cube length (%d) differs from the number of inputs (%d).\n", 
                    Extra_FileReaderGetFileName(p), iLine+1, strlen(pCubeIn), nInputs );
                Abc_NtkDelete( pNtk );
                return NULL;
            }
            if ( strlen(pCubeOut) != (unsigned)nOutputs )
            {
                printf( "%s (line %d): Output cube length (%d) differs from the number of outputs (%d).\n", 
                    Extra_FileReaderGetFileName(p), iLine+1, strlen(pCubeOut), nOutputs );
                Abc_NtkDelete( pNtk );
                return NULL;
            }
            for ( i = 0; i < nOutputs; i++ )
            {
                if ( pCubeOut[i] == '1' )
                {
                    Vec_StrAppend( ppSops[i], pCubeIn );
                    Vec_StrAppend( ppSops[i], " 1\n" );
                }
            }
            nCubes++;
        }
Example #3
0
/**Function*************************************************************

  Synopsis    [Reads one (main or exdc) network from the BLIF file.]

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
Abc_Ntk_t * Io_ReadBlifNetworkOne( Io_ReadBlif_t * p )
{
    ProgressBar * pProgress = NULL;
    Abc_Ntk_t * pNtk;
    char * pDirective;
    int iLine, fTokensReady, fStatus;

    // make sure the tokens are present
    assert( p->vTokens != NULL );

    // create the new network
    p->pNtkCur = pNtk = Abc_NtkAlloc( ABC_NTK_NETLIST, ABC_FUNC_SOP, 1 );
    // read the model name
    if ( strcmp( (char *)p->vTokens->pArray[0], ".model" ) == 0 )
    {
        char * pToken, * pPivot;
        if ( Vec_PtrSize(p->vTokens) != 2 )
        {
            p->LineCur = Extra_FileReaderGetLineNumber(p->pReader, 0);
            sprintf( p->sError, "The .model line does not have exactly two entries." );
            Io_ReadBlifPrintErrorMessage( p );
            return NULL;
        }
        for ( pPivot = pToken = (char *)Vec_PtrEntry(p->vTokens, 1); *pToken; pToken++ )
            if ( *pToken == '/' || *pToken == '\\' )
                pPivot = pToken+1;
        pNtk->pName = Extra_UtilStrsav( pPivot );
    }
    else if ( strcmp( (char *)p->vTokens->pArray[0], ".exdc" ) != 0 ) 
    {
        printf( "%s: File parsing skipped after line %d (\"%s\").\n", p->pFileName, 
            Extra_FileReaderGetLineNumber(p->pReader, 0), (char*)p->vTokens->pArray[0] );
        Abc_NtkDelete(pNtk);
        p->pNtkCur = NULL;
        return NULL;
    }

    // read the inputs/outputs
    if ( p->pNtkMaster == NULL )
        pProgress = Extra_ProgressBarStart( stdout, Extra_FileReaderGetFileSize(p->pReader) );
    fTokensReady = fStatus = 0;
    for ( iLine = 0; fTokensReady || (p->vTokens = Io_ReadBlifGetTokens(p)); iLine++ )
    {
        if ( p->pNtkMaster == NULL && iLine % 1000 == 0 )
            Extra_ProgressBarUpdate( pProgress, Extra_FileReaderGetCurPosition(p->pReader), NULL );

        // consider different line types
        fTokensReady = 0;
        pDirective = (char *)p->vTokens->pArray[0];
        if ( !strcmp( pDirective, ".names" ) )
            { fStatus = Io_ReadBlifNetworkNames( p, &p->vTokens ); fTokensReady = 1; }
        else if ( !strcmp( pDirective, ".gate" ) )
            fStatus = Io_ReadBlifNetworkGate( p, p->vTokens );
        else if ( !strcmp( pDirective, ".latch" ) )
            fStatus = Io_ReadBlifNetworkLatch( p, p->vTokens );
        else if ( !strcmp( pDirective, ".inputs" ) )
            fStatus = Io_ReadBlifNetworkInputs( p, p->vTokens );
        else if ( !strcmp( pDirective, ".outputs" ) )
            fStatus = Io_ReadBlifNetworkOutputs( p, p->vTokens );
        else if ( !strcmp( pDirective, ".input_arrival" ) )
            fStatus = Io_ReadBlifNetworkInputArrival( p, p->vTokens );
        else if ( !strcmp( pDirective, ".output_required" ) )
            fStatus = Io_ReadBlifNetworkOutputRequired( p, p->vTokens );
        else if ( !strcmp( pDirective, ".default_input_arrival" ) )
            fStatus = Io_ReadBlifNetworkDefaultInputArrival( p, p->vTokens );
        else if ( !strcmp( pDirective, ".default_output_required" ) )
            fStatus = Io_ReadBlifNetworkDefaultOutputRequired( p, p->vTokens );
        else if ( !strcmp( pDirective, ".and_gate_delay" ) )
            fStatus = Io_ReadBlifNetworkAndGateDelay( p, p->vTokens );
//        else if ( !strcmp( pDirective, ".subckt" ) )
//            fStatus = Io_ReadBlifNetworkSubcircuit( p, p->vTokens );
        else if ( !strcmp( pDirective, ".exdc" ) )
            break;
        else if ( !strcmp( pDirective, ".end" ) )
        {
            p->vTokens = Io_ReadBlifGetTokens(p);
            break;
        }
        else if ( !strcmp( pDirective, ".blackbox" ) )
        {
            pNtk->ntkType = ABC_NTK_NETLIST;
            pNtk->ntkFunc = ABC_FUNC_BLACKBOX;
            Mem_FlexStop( (Mem_Flex_t *)pNtk->pManFunc, 0 );
            pNtk->pManFunc = NULL;
        }
        else
            printf( "%s (line %d): Skipping directive \"%s\".\n", p->pFileName, 
                Extra_FileReaderGetLineNumber(p->pReader, 0), pDirective );
        if ( p->vTokens == NULL ) // some files do not have ".end" in the end
            break;
        if ( fStatus == 1 )
        {
            Extra_ProgressBarStop( pProgress );
            Abc_NtkDelete( pNtk );
            return NULL;
        }
    }
    if ( p->pNtkMaster == NULL )
        Extra_ProgressBarStop( pProgress );
    return pNtk;
}
Example #4
0
/**Function*************************************************************

  Synopsis    []

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
Abc_Ntk_t * Io_ReadEdifNetwork( Extra_FileReader_t * p )
{
    ProgressBar * pProgress;
    Vec_Ptr_t * vTokens;
    Abc_Ntk_t * pNtk;
    Abc_Obj_t * pNet, * pObj, * pFanout;
    char * pGateName, * pNetName;
    int fTokensReady, iLine, i;

    // read the first line
    vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
    if ( strcmp( (char *)vTokens->pArray[0], "edif" ) != 0 )
    {
        printf( "%s: Wrong input file format.\n", Extra_FileReaderGetFileName(p) );
        return NULL;
    }
    
    // allocate the empty network
    pNtk = Abc_NtkStartRead( Extra_FileReaderGetFileName(p) );

    // go through the lines of the file
    fTokensReady = 0;
    pProgress = Extra_ProgressBarStart( stdout, Extra_FileReaderGetFileSize(p) );
    for ( iLine = 1; fTokensReady || (vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p)); iLine++ )
    {
        Extra_ProgressBarUpdate( pProgress, Extra_FileReaderGetCurPosition(p), NULL );

        // get the type of the line
        fTokensReady = 0;
        if ( strcmp( (char *)vTokens->pArray[0], "instance" ) == 0 )
        { 
            pNetName = (char *)vTokens->pArray[1];
            pNet = Abc_NtkFindOrCreateNet( pNtk, pNetName );
            vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
            vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
            pGateName = (char *)vTokens->pArray[1];
            if ( strncmp( pGateName, "Flip", 4 ) == 0 )
            {
                pObj = Abc_NtkCreateLatch( pNtk );
                Abc_LatchSetInit0( pObj );
            }
            else
            {
                pObj = Abc_NtkCreateNode( pNtk );
//                pObj->pData = Abc_NtkRegisterName( pNtk, pGateName );
                pObj->pData = Extra_UtilStrsav( pGateName ); // memory leak!!!
            }
            Abc_ObjAddFanin( pNet, pObj );
        }
        else if ( strcmp( (char *)vTokens->pArray[0], "net" ) == 0 )
        {
            pNetName = (char *)vTokens->pArray[1];
            if ( strcmp( pNetName, "CK" ) == 0 || strcmp( pNetName, "RESET" ) == 0 )
                continue;
            if ( strcmp( pNetName + strlen(pNetName) - 4, "_out" ) == 0 )
                pNetName[strlen(pNetName) - 4] = 0;
            pNet = Abc_NtkFindNet( pNtk, pNetName );
            assert( pNet );
            vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
            vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
            vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
            while ( strcmp( (char *)vTokens->pArray[0], "portRef" ) == 0 )
            {
                if ( strcmp( pNetName, (char *)vTokens->pArray[3] ) != 0 )
                {
                    pFanout = Abc_NtkFindNet( pNtk, (char *)vTokens->pArray[3] );
                    Abc_ObjAddFanin( Abc_ObjFanin0(pFanout), pNet );
                }
                vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
            }
            fTokensReady = 1;
        }
        else if ( strcmp( (char *)vTokens->pArray[0], "library" ) == 0 )
        {
            vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
            vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
            vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
            vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
            vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
            while ( strcmp( (char *)vTokens->pArray[0], "port" ) == 0 )
            {
                pNetName = (char *)vTokens->pArray[1];
                if ( strcmp( pNetName, "CK" ) == 0 || strcmp( pNetName, "RESET" ) == 0 )
                {
                    vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
                    continue;
                }
                if ( strcmp( pNetName + strlen(pNetName) - 3, "_PO" ) == 0 )
                    pNetName[strlen(pNetName) - 3] = 0;
                if ( strcmp( (char *)vTokens->pArray[3], "INPUT" ) == 0 )
                    Io_ReadCreatePi( pNtk, (char *)vTokens->pArray[1] );
                else if ( strcmp( (char *)vTokens->pArray[3], "OUTPUT" ) == 0 )
                    Io_ReadCreatePo( pNtk, (char *)vTokens->pArray[1] );
                else
                {
                    printf( "%s (line %d): Wrong interface specification.\n", Extra_FileReaderGetFileName(p), iLine );
                    Abc_NtkDelete( pNtk );
                    return NULL;
                }
                vTokens = (Vec_Ptr_t *)Extra_FileReaderGetTokens(p);
            }
        }
        else if ( strcmp( (char *)vTokens->pArray[0], "design" ) == 0 )
        {
            ABC_FREE( pNtk->pName ); 
            pNtk->pName = (char *)Extra_UtilStrsav( (char *)vTokens->pArray[3] );
            break;
        }
    }
    Extra_ProgressBarStop( pProgress );

    // assign logic functions
    Abc_NtkForEachNode( pNtk, pObj, i )
    {
        if ( strncmp( (char *)pObj->pData, "And", 3 ) == 0 )
            Abc_ObjSetData( pObj, Abc_SopCreateAnd((Mem_Flex_t *)pNtk->pManFunc, Abc_ObjFaninNum(pObj), NULL) );
        else if ( strncmp( (char *)pObj->pData, "Or", 2 ) == 0 )
            Abc_ObjSetData( pObj, Abc_SopCreateOr((Mem_Flex_t *)pNtk->pManFunc, Abc_ObjFaninNum(pObj), NULL) );
        else if ( strncmp( (char *)pObj->pData, "Nand", 4 ) == 0 )
            Abc_ObjSetData( pObj, Abc_SopCreateNand((Mem_Flex_t *)pNtk->pManFunc, Abc_ObjFaninNum(pObj)) );
        else if ( strncmp( (char *)pObj->pData, "Nor", 3 ) == 0 )
            Abc_ObjSetData( pObj, Abc_SopCreateNor((Mem_Flex_t *)pNtk->pManFunc, Abc_ObjFaninNum(pObj)) );
        else if ( strncmp( (char *)pObj->pData, "Exor", 4 ) == 0 )
            Abc_ObjSetData( pObj, Abc_SopCreateXor((Mem_Flex_t *)pNtk->pManFunc, Abc_ObjFaninNum(pObj)) );
        else if ( strncmp( (char *)pObj->pData, "Exnor", 5 ) == 0 )
            Abc_ObjSetData( pObj, Abc_SopCreateNxor((Mem_Flex_t *)pNtk->pManFunc, Abc_ObjFaninNum(pObj)) );
        else if ( strncmp( (char *)pObj->pData, "Inv", 3 ) == 0 )
            Abc_ObjSetData( pObj, Abc_SopCreateInv((Mem_Flex_t *)pNtk->pManFunc) );
        else if ( strncmp( (char *)pObj->pData, "Buf", 3 ) == 0 )
            Abc_ObjSetData( pObj, Abc_SopCreateBuf((Mem_Flex_t *)pNtk->pManFunc) );
        else
        {
            printf( "%s: Unknown gate type \"%s\".\n", Extra_FileReaderGetFileName(p), (char*)pObj->pData );
            Abc_NtkDelete( pNtk );
            return NULL;
        }
    }
    // check if constants have been added
//    if ( pNet = Abc_NtkFindNet( pNtk, "VDD" ) )
//        Io_ReadCreateConst( pNtk, "VDD", 1 );
//    if ( pNet = Abc_NtkFindNet( pNtk, "GND" ) )
//        Io_ReadCreateConst( pNtk, "GND", 0 );

    Abc_NtkFinalizeRead( pNtk );
    return pNtk;
}