Class ILKernelGenerator

Namespace

NumSharp.Backends.Kernels

Assembly

NumSharp.dll

Generates per-chunk IL kernels for NDIter-driven execution.

Kernels emitted here are called as the inner loop of an NDIter iteration — once per chunk, with dataptrs/strides/count provided by the iterator. The kernel does no axis or stride walking of its own.

Add new kernel families in ILKernelGenerator.<Op>.cs partial files. See DirectILKernelGenerator for the legacy whole-array kernels currently being migrated to this model.

public static class ILKernelGenerator

Inheritance

object

ILKernelGenerator

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Methods

GetCumSumInnerLoop(NPTypeCode, NPTypeCode)

Returns the NDIter-driven cumulative-sum inner loop for inType → accType. The returned delegate matches NDInnerLoopFunc; drive it with an iterator whose scan axis has been removed (see DefaultEngine.AccumulateAxis), passing a pointer to a ILKernelGenerator.ScanAxisAux as the kernel's auxdata.

public static NDInnerLoopFunc GetCumSumInnerLoop(NPTypeCode inType, NPTypeCode accType)

Parameters

inType NPTypeCode

accType NPTypeCode

Returns

NDInnerLoopFunc

GetReduceInnerLoop(ReduceKernelKey)

Returns the cached per-chunk reduction kernel for the given (op, input, accumulator) triple, or null when no NDIter-driven kernel exists yet (caller falls back to the DirectILKernelGenerator path). The returned delegate matches NDInnerLoopFunc; hand it to an iterator built by NewReduce(NDArray, NDArray, int, NDIterGlobalFlags).

public static NDInnerLoopFunc GetReduceInnerLoop(ILKernelGenerator.ReduceKernelKey key)

Parameters

key ILKernelGenerator.ReduceKernelKey

Returns

NDInnerLoopFunc

MeanDivideByCount(NDArray, long)

Divide every element of output by count in place — the post-pass that turns an accumulated axis Sum into a Mean. For Complex this divides both components by the real count (NumPy: mean = sum / n), which is exactly what the legacy MeanAxisComplex did per element but without its per-output-row NDArray allocation. Writes through SetAtIndex(object, long) so any output layout is honored.

public static void MeanDivideByCount(NDArray output, long count)

Parameters

output NDArray

count long

SeedReduceIdentity(NDArray, ReductionOp)

Pre-fill output with the reduction identity for op before driving a REDUCE iterator. Required because the per-chunk kernels fold into the existing output slot(s). Writes through SetAtIndex(object, long) so any output layout (contiguous fresh alloc or user-supplied view) is honored.

public static void SeedReduceIdentity(NDArray output, ReductionOp op)

Parameters

output NDArray

op ReductionOp