Class NaryOp

  • All Implemented Interfaces:

    public class NaryOp
    extends Hop
    The NaryOp Hop allows for a variable number of operands. Functionality such as 'printf' (overloaded into the existing print function) is an example of an operation that potentially takes a variable number of operands.
    • Constructor Detail

      • NaryOp

        public NaryOp​(String name,
                      Types.DataType dataType,
                      Types.ValueType valueType,
                      Types.OpOpN op,
                      Hop... inputs)
        NaryOp constructor.
        name - the target name, typically set by the DMLTranslator when constructing Hops. (For example, 'parsertemp1'.)
        dataType - the target data type (SCALAR for printf)
        valueType - the target value type (STRING for printf)
        op - the operation type (such as PRINTF)
        inputs - a variable number of input Hops
    • Method Detail

      • checkArity

        public void checkArity()
        MultipleOp may have any number of inputs.
        Specified by:
        checkArity in class Hop
      • isGPUEnabled

        public boolean isGPUEnabled()
        Description copied from class: Hop
        In memory-based optimizer mode (see OptimizerUtils.isMemoryBasedOptLevel()), the exectype is determined by checking this method as well as memory budget of this Hop. Please see findExecTypeByMemEstimate for more detail. This method is necessary because not all operator are supported efficiently on GPU (for example: operations on frames and scalar as well as operations such as table).
        Specified by:
        isGPUEnabled in class Hop
        true if the Hop is eligible for GPU Exectype.
      • constructLops

        public Lop constructLops()
        Construct the corresponding Lops for this Hop
        Specified by:
        constructLops in class Hop
      • allowsAllExecTypes

        public boolean allowsAllExecTypes()
        Specified by:
        allowsAllExecTypes in class Hop
      • computeMemEstimate

        public void computeMemEstimate​(MemoTable memo)
        Description copied from class: Hop
        Computes the estimate of memory required to store the input/output of this hop in memory. This is the default implementation (orchestration of hop-specific implementation) that should suffice for most hops. If a hop requires more control, this method should be overwritten with awareness of (1) output estimates, and (2) propagation of worst-case matrix characteristics (dimensions, sparsity). TODO remove memo table and, on constructor refresh, inference in refresh, single compute mem, maybe general computeMemEstimate, flags to indicate if estimate or not.
        computeMemEstimate in class Hop
        memo - memory table
      • refreshSizeInformation

        public void refreshSizeInformation()
        Description copied from class: Hop
        Update the output size information for this hop.
        Specified by:
        refreshSizeInformation in class Hop
      • compare

        public boolean compare​(Hop that)
        Specified by:
        compare in class Hop