Examples with Group org.apache.sysml.lops.Group used on opensource projects

Example 31 with Group

use of org.apache.sysml.lops.Group in project incubator-systemml by apache.

the class AggBinaryOp method constructMRLopsCPMMWithLeftTransposeRewrite.

private Lop constructMRLopsCPMMWithLeftTransposeRewrite() {
    // guaranteed to exists
    Hop X = getInput().get(0).getInput().get(0);
    Hop Y = getInput().get(1);
    // right vector transpose CP
    Lop tY = new Transform(Y.constructLops(), OperationTypes.Transpose, getDataType(), getValueType(), ExecType.CP);
    tY.getOutputParameters().setDimensions(Y.getDim2(), Y.getDim1(), getRowsInBlock(), getColsInBlock(), Y.getNnz());
    setLineNumbers(tY);
    // matrix multiply
    MMCJType type = getMMCJAggregationType(X, Y);
    MMCJ mmcj = new MMCJ(tY, X.constructLops(), getDataType(), getValueType(), type, ExecType.MR);
    setOutputDimensions(mmcj);
    setLineNumbers(mmcj);
    Group grp = new Group(mmcj, Group.OperationTypes.Sort, getDataType(), getValueType());
    setOutputDimensions(grp);
    setLineNumbers(grp);
    Aggregate agg1 = new Aggregate(grp, HopsAgg2Lops.get(outerOp), getDataType(), getValueType(), ExecType.MR);
    setOutputDimensions(agg1);
    setLineNumbers(agg1);
    // aggregation uses kahanSum but the inputs do not have correction values
    agg1.setupCorrectionLocation(CorrectionLocationType.NONE);
    // result transpose CP
    Lop out = new Transform(agg1, OperationTypes.Transpose, getDataType(), getValueType(), ExecType.CP);
    out.getOutputParameters().setDimensions(X.getDim2(), Y.getDim2(), getRowsInBlock(), getColsInBlock(), getNnz());
    return out;
}

Example 32 with Group

use of org.apache.sysml.lops.Group in project incubator-systemml by apache.

the class BinaryOp method constructLopsIQM.

private void constructLopsIQM(ExecType et) {
    if (et == ExecType.MR) {
        CombineBinary combine = CombineBinary.constructCombineLop(OperationTypes.PreSort, (Lop) getInput().get(0).constructLops(), (Lop) getInput().get(1).constructLops(), DataType.MATRIX, getValueType());
        combine.getOutputParameters().setDimensions(getInput().get(0).getDim1(), getInput().get(0).getDim2(), getInput().get(0).getRowsInBlock(), getInput().get(0).getColsInBlock(), getInput().get(0).getNnz());
        SortKeys sort = SortKeys.constructSortByValueLop(combine, SortKeys.OperationTypes.WithWeights, DataType.MATRIX, ValueType.DOUBLE, ExecType.MR);
        // Sort dimensions are same as the first input
        sort.getOutputParameters().setDimensions(getInput().get(0).getDim1(), getInput().get(0).getDim2(), getInput().get(0).getRowsInBlock(), getInput().get(0).getColsInBlock(), getInput().get(0).getNnz());
        Data lit = Data.createLiteralLop(ValueType.DOUBLE, Double.toString(0.25));
        setLineNumbers(lit);
        PickByCount pick = new PickByCount(sort, lit, DataType.MATRIX, getValueType(), PickByCount.OperationTypes.RANGEPICK);
        pick.getOutputParameters().setDimensions(-1, -1, getRowsInBlock(), getColsInBlock(), -1);
        setLineNumbers(pick);
        PartialAggregate pagg = new PartialAggregate(pick, HopsAgg2Lops.get(Hop.AggOp.SUM), HopsDirection2Lops.get(Hop.Direction.RowCol), DataType.MATRIX, getValueType());
        setLineNumbers(pagg);
        // Set the dimensions of PartialAggregate LOP based on the
        // direction in which aggregation is performed
        pagg.setDimensionsBasedOnDirection(getDim1(), getDim2(), getRowsInBlock(), getColsInBlock());
        Group group1 = new Group(pagg, Group.OperationTypes.Sort, DataType.MATRIX, getValueType());
        setOutputDimensions(group1);
        setLineNumbers(group1);
        Aggregate agg1 = new Aggregate(group1, HopsAgg2Lops.get(Hop.AggOp.SUM), DataType.MATRIX, getValueType(), ExecType.MR);
        setOutputDimensions(agg1);
        agg1.setupCorrectionLocation(pagg.getCorrectionLocation());
        setLineNumbers(agg1);
        UnaryCP unary1 = new UnaryCP(agg1, HopsOpOp1LopsUS.get(OpOp1.CAST_AS_SCALAR), DataType.SCALAR, getValueType());
        unary1.getOutputParameters().setDimensions(0, 0, 0, 0, -1);
        setLineNumbers(unary1);
        Unary iqm = new Unary(sort, unary1, Unary.OperationTypes.MR_IQM, DataType.SCALAR, ValueType.DOUBLE, ExecType.CP);
        iqm.getOutputParameters().setDimensions(0, 0, 0, 0, -1);
        setLineNumbers(iqm);
        setLops(iqm);
    } else {
        SortKeys sort = SortKeys.constructSortByValueLop(getInput().get(0).constructLops(), getInput().get(1).constructLops(), SortKeys.OperationTypes.WithWeights, getInput().get(0).getDataType(), getInput().get(0).getValueType(), et);
        sort.getOutputParameters().setDimensions(getInput().get(0).getDim1(), getInput().get(0).getDim2(), getInput().get(0).getRowsInBlock(), getInput().get(0).getColsInBlock(), getInput().get(0).getNnz());
        PickByCount pick = new PickByCount(sort, null, getDataType(), getValueType(), PickByCount.OperationTypes.IQM, et, true);
        setOutputDimensions(pick);
        setLineNumbers(pick);
        setLops(pick);
    }
}

Example 33 with Group

use of org.apache.sysml.lops.Group in project incubator-systemml by apache.

the class BinaryOp method constructLopsBinaryDefault.

private void constructLopsBinaryDefault() {
    /* Default behavior for BinaryOp */
    // it depends on input data types
    DataType dt1 = getInput().get(0).getDataType();
    DataType dt2 = getInput().get(1).getDataType();
    if (dt1 == dt2 && dt1 == DataType.SCALAR) {
        // Both operands scalar
        BinaryScalar binScalar1 = new BinaryScalar(getInput().get(0).constructLops(), getInput().get(1).constructLops(), HopsOpOp2LopsBS.get(op), getDataType(), getValueType());
        binScalar1.getOutputParameters().setDimensions(0, 0, 0, 0, -1);
        setLineNumbers(binScalar1);
        setLops(binScalar1);
    } else if ((dt1 == DataType.MATRIX && dt2 == DataType.SCALAR) || (dt1 == DataType.SCALAR && dt2 == DataType.MATRIX)) {
        // One operand is Matrix and the other is scalar
        ExecType et = optFindExecType();
        // select specific operator implementations
        Unary.OperationTypes ot = null;
        Hop right = getInput().get(1);
        if (op == OpOp2.POW && right instanceof LiteralOp && ((LiteralOp) right).getDoubleValue() == 2.0)
            ot = Unary.OperationTypes.POW2;
        else if (op == OpOp2.MULT && right instanceof LiteralOp && ((LiteralOp) right).getDoubleValue() == 2.0)
            ot = Unary.OperationTypes.MULTIPLY2;
        else
            // general case
            ot = HopsOpOp2LopsU.get(op);
        Unary unary1 = new Unary(getInput().get(0).constructLops(), getInput().get(1).constructLops(), ot, getDataType(), getValueType(), et);
        setOutputDimensions(unary1);
        setLineNumbers(unary1);
        setLops(unary1);
    } else {
        // Both operands are Matrixes
        ExecType et = optFindExecType();
        boolean isGPUSoftmax = et == ExecType.GPU && op == Hop.OpOp2.DIV && getInput().get(0) instanceof UnaryOp && getInput().get(1) instanceof AggUnaryOp && ((UnaryOp) getInput().get(0)).getOp() == OpOp1.EXP && ((AggUnaryOp) getInput().get(1)).getOp() == AggOp.SUM && ((AggUnaryOp) getInput().get(1)).getDirection() == Direction.Row && getInput().get(0) == getInput().get(1).getInput().get(0);
        if (isGPUSoftmax) {
            UnaryCP softmax = new UnaryCP(getInput().get(0).getInput().get(0).constructLops(), UnaryCP.OperationTypes.SOFTMAX, getDataType(), getValueType(), et);
            setOutputDimensions(softmax);
            setLineNumbers(softmax);
            setLops(softmax);
        } else if (et == ExecType.CP || et == ExecType.GPU) {
            Lop binary = null;
            boolean isLeftXGt = (getInput().get(0) instanceof BinaryOp) && ((BinaryOp) getInput().get(0)).getOp() == OpOp2.GREATER;
            Hop potentialZero = isLeftXGt ? ((BinaryOp) getInput().get(0)).getInput().get(1) : null;
            boolean isLeftXGt0 = isLeftXGt && potentialZero != null && potentialZero instanceof LiteralOp && ((LiteralOp) potentialZero).getDoubleValue() == 0;
            if (op == OpOp2.MULT && isLeftXGt0 && !getInput().get(0).isVector() && !getInput().get(1).isVector() && getInput().get(0).dimsKnown() && getInput().get(1).dimsKnown()) {
                binary = new ConvolutionTransform(getInput().get(0).getInput().get(0).constructLops(), getInput().get(1).constructLops(), ConvolutionTransform.OperationTypes.RELU_BACKWARD, getDataType(), getValueType(), et, -1);
            } else
                binary = new Binary(getInput().get(0).constructLops(), getInput().get(1).constructLops(), HopsOpOp2LopsB.get(op), getDataType(), getValueType(), et);
            setOutputDimensions(binary);
            setLineNumbers(binary);
            setLops(binary);
        } else if (et == ExecType.SPARK) {
            Hop left = getInput().get(0);
            Hop right = getInput().get(1);
            MMBinaryMethod mbin = optFindMMBinaryMethodSpark(left, right);
            Lop binary = null;
            if (mbin == MMBinaryMethod.MR_BINARY_UAGG_CHAIN) {
                AggUnaryOp uRight = (AggUnaryOp) right;
                binary = new BinaryUAggChain(left.constructLops(), HopsOpOp2LopsB.get(op), HopsAgg2Lops.get(uRight.getOp()), HopsDirection2Lops.get(uRight.getDirection()), getDataType(), getValueType(), et);
            } else if (mbin == MMBinaryMethod.MR_BINARY_M) {
                boolean partitioned = false;
                boolean isColVector = (right.getDim2() == 1 && left.getDim1() == right.getDim1());
                binary = new BinaryM(left.constructLops(), right.constructLops(), HopsOpOp2LopsB.get(op), getDataType(), getValueType(), et, partitioned, isColVector);
            } else {
                binary = new Binary(left.constructLops(), right.constructLops(), HopsOpOp2LopsB.get(op), getDataType(), getValueType(), et);
            }
            setOutputDimensions(binary);
            setLineNumbers(binary);
            setLops(binary);
        } else // MR
        {
            Hop left = getInput().get(0);
            Hop right = getInput().get(1);
            MMBinaryMethod mbin = optFindMMBinaryMethod(left, right);
            if (mbin == MMBinaryMethod.MR_BINARY_M) {
                boolean needPart = requiresPartitioning(right);
                Lop dcInput = right.constructLops();
                if (needPart) {
                    // right side in distributed cache
                    ExecType etPart = (OptimizerUtils.estimateSizeExactSparsity(right.getDim1(), right.getDim2(), OptimizerUtils.getSparsity(right.getDim1(), right.getDim2(), right.getNnz())) < OptimizerUtils.getLocalMemBudget()) ? ExecType.CP : // operator selection
                    ExecType.MR;
                    dcInput = new DataPartition(dcInput, DataType.MATRIX, ValueType.DOUBLE, etPart, (right.getDim2() == 1) ? PDataPartitionFormat.ROW_BLOCK_WISE_N : PDataPartitionFormat.COLUMN_BLOCK_WISE_N);
                    dcInput.getOutputParameters().setDimensions(right.getDim1(), right.getDim2(), right.getRowsInBlock(), right.getColsInBlock(), right.getNnz());
                    dcInput.setAllPositions(right.getFilename(), right.getBeginLine(), right.getBeginColumn(), right.getEndLine(), right.getEndColumn());
                }
                BinaryM binary = new BinaryM(left.constructLops(), dcInput, HopsOpOp2LopsB.get(op), getDataType(), getValueType(), ExecType.MR, needPart, (right.getDim2() == 1 && left.getDim1() == right.getDim1()));
                setOutputDimensions(binary);
                setLineNumbers(binary);
                setLops(binary);
            } else if (mbin == MMBinaryMethod.MR_BINARY_UAGG_CHAIN) {
                AggUnaryOp uRight = (AggUnaryOp) right;
                BinaryUAggChain bin = new BinaryUAggChain(left.constructLops(), HopsOpOp2LopsB.get(op), HopsAgg2Lops.get(uRight.getOp()), HopsDirection2Lops.get(uRight.getDirection()), getDataType(), getValueType(), et);
                setOutputDimensions(bin);
                setLineNumbers(bin);
                setLops(bin);
            } else if (mbin == MMBinaryMethod.MR_BINARY_OUTER_R) {
                boolean requiresRepLeft = (!right.dimsKnown() || right.getDim2() > right.getColsInBlock());
                boolean requiresRepRight = (!left.dimsKnown() || left.getDim1() > right.getRowsInBlock());
                Lop leftLop = left.constructLops();
                Lop rightLop = right.constructLops();
                if (requiresRepLeft) {
                    // ncol of right determines rep of left
                    Lop offset = createOffsetLop(right, true);
                    leftLop = new RepMat(leftLop, offset, true, left.getDataType(), left.getValueType());
                    setOutputDimensions(leftLop);
                    setLineNumbers(leftLop);
                }
                if (requiresRepRight) {
                    // nrow of right determines rep of right
                    Lop offset = createOffsetLop(left, false);
                    rightLop = new RepMat(rightLop, offset, false, right.getDataType(), right.getValueType());
                    setOutputDimensions(rightLop);
                    setLineNumbers(rightLop);
                }
                Group group1 = new Group(leftLop, Group.OperationTypes.Sort, getDataType(), getValueType());
                setLineNumbers(group1);
                setOutputDimensions(group1);
                Group group2 = new Group(rightLop, Group.OperationTypes.Sort, getDataType(), getValueType());
                setLineNumbers(group2);
                setOutputDimensions(group2);
                Binary binary = new Binary(group1, group2, HopsOpOp2LopsB.get(op), getDataType(), getValueType(), et);
                setOutputDimensions(binary);
                setLineNumbers(binary);
                setLops(binary);
            } else // MMBinaryMethod.MR_BINARY_R
            {
                boolean requiresRep = requiresReplication(left, right);
                Lop rightLop = right.constructLops();
                if (requiresRep) {
                    // ncol of left input (determines num replicates)
                    Lop offset = createOffsetLop(left, (right.getDim2() <= 1));
                    rightLop = new RepMat(rightLop, offset, (right.getDim2() <= 1), right.getDataType(), right.getValueType());
                    setOutputDimensions(rightLop);
                    setLineNumbers(rightLop);
                }
                Group group1 = new Group(getInput().get(0).constructLops(), Group.OperationTypes.Sort, getDataType(), getValueType());
                setLineNumbers(group1);
                setOutputDimensions(group1);
                Group group2 = new Group(rightLop, Group.OperationTypes.Sort, getDataType(), getValueType());
                setLineNumbers(group2);
                setOutputDimensions(group2);
                Binary binary = new Binary(group1, group2, HopsOpOp2LopsB.get(op), getDataType(), getValueType(), et);
                setLineNumbers(binary);
                setOutputDimensions(binary);
                setLops(binary);
            }
        }
    }
}

Example 34 with Group

use of org.apache.sysml.lops.Group in project incubator-systemml by apache.

the class BinaryOp method constructMRAppendLop.

/**
 * General case binary append.
 *
 * @param left high-level operator left
 * @param right high-level operator right
 * @param dt data type
 * @param vt value type
 * @param cbind true if cbind
 * @param current current high-level operator
 * @return low-level operator
 */
public static Lop constructMRAppendLop(Hop left, Hop right, DataType dt, ValueType vt, boolean cbind, Hop current) {
    Lop ret = null;
    long m1_dim1 = left.getDim1();
    long m1_dim2 = left.getDim2();
    long m2_dim1 = right.getDim1();
    long m2_dim2 = right.getDim2();
    // output rows
    long m3_dim1 = cbind ? m1_dim1 : ((m1_dim1 >= 0 && m2_dim1 >= 0) ? (m1_dim1 + m2_dim1) : -1);
    // output cols
    long m3_dim2 = cbind ? ((m1_dim2 >= 0 && m2_dim2 >= 0) ? (m1_dim2 + m2_dim2) : -1) : m1_dim2;
    // output nnz
    long m3_nnz = (left.getNnz() > 0 && right.getNnz() > 0) ? (left.getNnz() + right.getNnz()) : -1;
    long brlen = left.getRowsInBlock();
    long bclen = left.getColsInBlock();
    // offset 1st input
    Lop offset = createOffsetLop(left, cbind);
    AppendMethod am = optFindAppendMethod(m1_dim1, m1_dim2, m2_dim1, m2_dim2, brlen, bclen, cbind);
    switch(am) {
        case // special case map-only append
        MR_MAPPEND:
            {
                boolean needPart = requiresPartitioning(right);
                // pre partitioning
                Lop dcInput = right.constructLops();
                if (needPart) {
                    // right side in distributed cache
                    ExecType etPart = (OptimizerUtils.estimateSizeExactSparsity(right.getDim1(), right.getDim2(), OptimizerUtils.getSparsity(right.getDim1(), right.getDim2(), right.getNnz())) < OptimizerUtils.getLocalMemBudget()) ? ExecType.CP : // operator selection
                    ExecType.MR;
                    dcInput = new DataPartition(dcInput, DataType.MATRIX, ValueType.DOUBLE, etPart, PDataPartitionFormat.ROW_BLOCK_WISE_N);
                    dcInput.getOutputParameters().setDimensions(right.getDim1(), right.getDim2(), right.getRowsInBlock(), right.getColsInBlock(), right.getNnz());
                    dcInput.setAllPositions(right.getFilename(), right.getBeginLine(), right.getBeginColumn(), right.getEndLine(), right.getEndColumn());
                }
                AppendM appM = new AppendM(left.constructLops(), dcInput, offset, dt, vt, cbind, needPart, ExecType.MR);
                appM.setAllPositions(current.getFilename(), current.getBeginLine(), current.getBeginColumn(), current.getEndLine(), current.getEndColumn());
                appM.getOutputParameters().setDimensions(m3_dim1, m3_dim2, brlen, bclen, m3_nnz);
                ret = appM;
                break;
            }
        case // special case reduce append w/ one column block
        MR_RAPPEND:
            {
                // group
                Group group1 = new Group(left.constructLops(), Group.OperationTypes.Sort, DataType.MATRIX, vt);
                group1.getOutputParameters().setDimensions(m1_dim1, m1_dim2, brlen, bclen, left.getNnz());
                group1.setAllPositions(left.getFilename(), left.getBeginLine(), left.getBeginColumn(), left.getEndLine(), left.getEndColumn());
                Group group2 = new Group(right.constructLops(), Group.OperationTypes.Sort, DataType.MATRIX, vt);
                group1.getOutputParameters().setDimensions(m2_dim1, m2_dim2, brlen, bclen, right.getNnz());
                group1.setAllPositions(right.getFilename(), right.getBeginLine(), right.getBeginColumn(), right.getEndLine(), right.getEndColumn());
                AppendR appR = new AppendR(group1, group2, dt, vt, cbind, ExecType.MR);
                appR.getOutputParameters().setDimensions(m3_dim1, m3_dim2, brlen, bclen, m3_nnz);
                appR.setAllPositions(current.getFilename(), current.getBeginLine(), current.getBeginColumn(), current.getEndLine(), current.getEndColumn());
                ret = appR;
                break;
            }
        case MR_GAPPEND:
            {
                // general case: map expand append, reduce aggregate
                // offset second input
                Lop offset2 = createOffsetLop(right, cbind);
                AppendG appG = new AppendG(left.constructLops(), right.constructLops(), offset, offset2, dt, vt, cbind, ExecType.MR);
                appG.getOutputParameters().setDimensions(m3_dim1, m3_dim2, brlen, bclen, m3_nnz);
                appG.setAllPositions(current.getFilename(), current.getBeginLine(), current.getBeginColumn(), current.getEndLine(), current.getEndColumn());
                // group
                Group group1 = new Group(appG, Group.OperationTypes.Sort, DataType.MATRIX, vt);
                group1.getOutputParameters().setDimensions(m3_dim1, m3_dim2, brlen, bclen, m3_nnz);
                group1.setAllPositions(current.getFilename(), current.getBeginLine(), current.getBeginColumn(), current.getEndLine(), current.getEndColumn());
                // aggregate
                Aggregate agg1 = new Aggregate(group1, Aggregate.OperationTypes.Sum, DataType.MATRIX, vt, ExecType.MR);
                agg1.getOutputParameters().setDimensions(m3_dim1, m3_dim2, brlen, bclen, m3_nnz);
                agg1.setAllPositions(current.getFilename(), current.getBeginLine(), current.getBeginColumn(), current.getEndLine(), current.getEndColumn());
                ret = agg1;
                break;
            }
        default:
            throw new HopsException("Invalid MR append method: " + am);
    }
    return ret;
}

Example 35 with Group

use of org.apache.sysml.lops.Group in project incubator-systemml by apache.

the class LeftIndexingOp method constructLops.

@Override
public Lop constructLops() {
    // return already created lops
    if (getLops() != null)
        return getLops();
    try {
        ExecType et = optFindExecType();
        if (et == ExecType.MR) {
            // the right matrix is reindexed
            Lop top = getInput().get(2).constructLops();
            Lop bottom = getInput().get(3).constructLops();
            Lop left = getInput().get(4).constructLops();
            Lop right = getInput().get(5).constructLops();
            // right hand matrix
            Lop nrow = new UnaryCP(getInput().get(0).constructLops(), OperationTypes.NROW, DataType.SCALAR, ValueType.INT);
            Lop ncol = new UnaryCP(getInput().get(0).constructLops(), OperationTypes.NCOL, DataType.SCALAR, ValueType.INT);
            Lop rightInput = null;
            if (isRightHandSideScalar()) {
                // insert cast to matrix if necessary (for reuse MR runtime)
                rightInput = new UnaryCP(getInput().get(1).constructLops(), OperationTypes.CAST_AS_MATRIX, DataType.MATRIX, ValueType.DOUBLE);
                rightInput.getOutputParameters().setDimensions(1L, 1L, ConfigurationManager.getBlocksize(), ConfigurationManager.getBlocksize(), -1L);
            } else
                rightInput = getInput().get(1).constructLops();
            RightIndex reindex = new RightIndex(rightInput, top, bottom, left, right, nrow, ncol, getDataType(), getValueType(), et, true);
            reindex.getOutputParameters().setDimensions(getInput().get(0).getDim1(), getInput().get(0).getDim2(), getRowsInBlock(), getColsInBlock(), getNnz());
            setLineNumbers(reindex);
            Group group1 = new Group(reindex, Group.OperationTypes.Sort, DataType.MATRIX, getValueType());
            group1.getOutputParameters().setDimensions(getInput().get(0).getDim1(), getInput().get(0).getDim2(), getRowsInBlock(), getColsInBlock(), getNnz());
            setLineNumbers(group1);
            // the left matrix is zeroed out
            ZeroOut zeroout = new ZeroOut(getInput().get(0).constructLops(), top, bottom, left, right, getInput().get(0).getDim1(), getInput().get(0).getDim2(), getDataType(), getValueType(), et);
            zeroout.getOutputParameters().setDimensions(getInput().get(0).getDim1(), getInput().get(0).getDim2(), getRowsInBlock(), getColsInBlock(), getNnz());
            setLineNumbers(zeroout);
            Group group2 = new Group(zeroout, Group.OperationTypes.Sort, DataType.MATRIX, getValueType());
            group2.getOutputParameters().setDimensions(getInput().get(0).getDim1(), getInput().get(0).getDim2(), getRowsInBlock(), getColsInBlock(), getNnz());
            setLineNumbers(group2);
            Binary binary = new Binary(group1, group2, HopsOpOp2LopsB.get(Hop.OpOp2.PLUS), getDataType(), getValueType(), et);
            binary.getOutputParameters().setDimensions(getInput().get(0).getDim1(), getInput().get(0).getDim2(), getRowsInBlock(), getColsInBlock(), getNnz());
            setLineNumbers(binary);
            setLops(binary);
        } else if (et == ExecType.SPARK) {
            Hop left = getInput().get(0);
            Hop right = getInput().get(1);
            LeftIndexingMethod method = getOptMethodLeftIndexingMethod(left.getDim1(), left.getDim2(), left.getRowsInBlock(), left.getColsInBlock(), left.getNnz(), right.getDim1(), right.getDim2(), right.getNnz(), right.getDataType());
            // insert cast to matrix if necessary (for reuse broadcast runtime)
            Lop rightInput = right.constructLops();
            if (isRightHandSideScalar()) {
                rightInput = new UnaryCP(rightInput, (left.getDataType() == DataType.MATRIX ? OperationTypes.CAST_AS_MATRIX : OperationTypes.CAST_AS_FRAME), left.getDataType(), right.getValueType());
                long bsize = ConfigurationManager.getBlocksize();
                rightInput.getOutputParameters().setDimensions(1, 1, bsize, bsize, -1);
            }
            LeftIndex leftIndexLop = new LeftIndex(left.constructLops(), rightInput, getInput().get(2).constructLops(), getInput().get(3).constructLops(), getInput().get(4).constructLops(), getInput().get(5).constructLops(), getDataType(), getValueType(), et, getSpLixCacheType(method));
            setOutputDimensions(leftIndexLop);
            setLineNumbers(leftIndexLop);
            setLops(leftIndexLop);
        } else {
            LeftIndex left = new LeftIndex(getInput().get(0).constructLops(), getInput().get(1).constructLops(), getInput().get(2).constructLops(), getInput().get(3).constructLops(), getInput().get(4).constructLops(), getInput().get(5).constructLops(), getDataType(), getValueType(), et);
            setOutputDimensions(left);
            setLineNumbers(left);
            setLops(left);
        }
    } catch (Exception e) {
        throw new HopsException(this.printErrorLocation() + "In LeftIndexingOp Hop, error in constructing Lops ", e);
    }
    // add reblock/checkpoint lops if necessary
    constructAndSetLopsDataFlowProperties();
    return getLops();
}