sdfg::gpu::ReductionLayout Struct Reference

Dense mixed-radix indexing for a strided reduction output footprint. More...

#include <sdfg/targets/gpu/gpu_reduce_layout.h>

Classes
struct	Dimension
	One source-address axis, measured in scalar elements rather than bytes. More...

Public Member Functions
	ReductionLayout (symbolic::Expression origin, std::vector< Dimension > axes)
	Sort and normalize axes relative to origin.
symbolic::Expression	unpack (symbolic::Expression slot) const
	Return the original address for a compact slot.
symbolic::Expression	pack (symbolic::Expression index) const
	Return the compact slot for an original address, omitting gaps between axes.

Public Attributes
symbolic::Expression	base
	Original address for the all-zero coordinate.
std::vector< Dimension >	dimensions
int64_t	extent = 1
	Number of compact slots, equal to the product of axis counts.

Detailed Description

Dense mixed-radix indexing for a strided reduction output footprint.

Maps reachable original addresses to contiguous partial-buffer slots. Dimensions are stored in increasing source-stride order, with unit-count axes removed. An empty dimension list represents a single output at base.

Constructor & Destructor Documentation

ReductionLayout()

sdfg::gpu::ReductionLayout::ReductionLayout	(	symbolic::Expression	origin,
		std::vector< Dimension >	axes )

Sort and normalize axes relative to origin.

Exceptions

InvalidSDFGException

for a null origin, nonpositive axes, overlapping dimensions, or a slot count/source span that overflows int64_t.

Member Function Documentation

pack()

symbolic::Expression sdfg::gpu::ReductionLayout::pack

(

symbolic::Expression

index

)

const

Return the compact slot for an original address, omitting gaps between axes.

Precondition

index belongs to this footprint; no membership check is generated.

unpack()

symbolic::Expression sdfg::gpu::ReductionLayout::unpack

(

symbolic::Expression

slot

)

const

Return the original address for a compact slot.

Precondition

slot is in [0, extent); no runtime bounds check is generated.

Member Data Documentation

base

symbolic::Expression sdfg::gpu::ReductionLayout::base

Original address for the all-zero coordinate.

dimensions

std::vector<Dimension> sdfg::gpu::ReductionLayout::dimensions

extent

int64_t sdfg::gpu::ReductionLayout::extent = 1

Number of compact slots, equal to the product of axis counts.

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The documentation for this struct was generated from the following file:

• opt/include/sdfg/targets/gpu/gpu_reduce_layout.h