CUTLASS: cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ > Class Template Reference

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cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ > Class Template Reference

`#include <mma_tensor_op_tile_iterator.h>`

## Classes
struct | Policy
| Internal structure of iterator - made public to enable introspection. More...

## Public Types
using | Shape = Shape_
| Shape of tile to load (concept: MatrixShape) More...
using | Element = Element_
| Element type. More...
using | Layout = cutlass::layout::RowMajor
| Layout of source tile. More...
using | InstructionShape = InstructionShape_
| Shape of one matrix product operation (concept: MatrixShape) More...
using | OpDelta = OpDelta_
| Delta between *MMA operations (in units of *MMA operations, concept: MatrixShape) More...
using | TensorRef = TensorRef< Element, Layout >
| TensorRef type for loading element from a tensor. More...
using | Index = typename TensorRef::Index
| Index type. More...
using | LongIndex = typename TensorRef::LongIndex
| Long Index type. More...
using | TensorCoord = typename TensorRef::TensorCoord
| Coordinate for an element in the tensor. More...
using | Fragment = Array< Element, Shape::kCount/kThreads >
| Fragment object holding a thread's part of a tile. More...

## Public Member Functions
CUTLASS_HOST_DEVICE | MmaTensorOpAccumulatorTileIterator ()
| Default ctor constructs null iterator. More...
CUTLASS_HOST_DEVICE | MmaTensorOpAccumulatorTileIterator (TensorRef const &ref, int lane_id)
| Constructor from TensorRef. More...
CUTLASS_HOST_DEVICE MmaTensorOpAccumulatorTileIterator & | add_pointer_offset (LongIndex offset)
| Adds a pointer offset to internal pointer(s) to advance through memory. More...
CUTLASS_HOST_DEVICE MmaTensorOpAccumulatorTileIterator & | add_tile_offset (TensorCoord const &tile_offset)
| Advances an iterator along logical dimensions of matrix in units of whole tiles. More...
CUTLASS_HOST_DEVICE MmaTensorOpAccumulatorTileIterator & | operator++ ()
| Advances the iterator along the advance dimension. More...
CUTLASS_HOST_DEVICE MmaTensorOpAccumulatorTileIterator & | operator-- ()
| Advances the iterator along the advance dimension. More...
CUTLASS_DEVICE MmaTensorOpAccumulatorTileIterator & | operator+= (TensorCoord const &tile_offset)
| advances in units of whole tiles along the logical coordinate space of the tensor More...
CUTLASS_DEVICE MmaTensorOpAccumulatorTileIterator & | operator-= (TensorCoord const &tile_offset)
CUTLASS_HOST_DEVICE void | load (Fragment &frag) const
| Loads a fragment from memory at the location pointed to by the iterator. More...
CUTLASS_DEVICE void | load_with_pointer_offset (Fragment &frag, Index pointer_offset) const
| Loads a fragment from memory with additional logical offset. More...
CUTLASS_DEVICE void | load_with_byte_offset (Fragment &frag, Index byte_offset) const
| Loads a fragment from memory with additional logical offset. More...
CUTLASS_DEVICE void | load (Fragment &frag, TensorCoord const &tile_offset) const
| Loads a fragment from memory with logical offset in units of whole tiles. More...
CUTLASS_DEVICE void | load (Fragment &frag, TensorCoord const &tile_offset, Index pointer_offset) const
| Loads a fragment from memory with logical offset in units of whole tiles. More...
CUTLASS_HOST_DEVICE void | store (Fragment const &frag) const
| Stores a fragment to memory. More...
CUTLASS_DEVICE void | store_with_pointer_offset (Fragment const &frag, Index pointer_offset) const
| Stores a fragment to memory with additional pointer offset. More...
CUTLASS_DEVICE void | store_with_byte_offset (Fragment const &frag, Index byte_offset) const
| Stores a fragment to memory with additional pointer offset. More...
CUTLASS_DEVICE void | store (Fragment &frag, TensorCoord const &tile_offset) const
| Stores a fragment to memory with logical offset in units of whole tiles. More...
CUTLASS_DEVICE void | store (Fragment const &frag, TensorCoord const &tile_offset, Index pointer_offset) const
| Stores a fragment from memory with logical offset in units of whole tiles. More...

## Static Public Attributes
static Operand const | kOperand = Operand::kC
| Operand tag. More...
static int const | kThreads = 32
| Number of participating threads. More...

## Detailed Description

### template<typename Shape_, typename Element_, typename InstructionShape_, typename OpDelta_>
class cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >

This tile iterator is specialized for 32-thread TensorOps. It is used to load or store accumulators from memory and is agnostic to layout. It could be faster if it assumed row-major accumulator layout.

Satisfies: ReadableRandomAccessContiguousTileIteratorConcept | WriteableRandomAccessContiguousTileIteratorConcept

## Member Typedef Documentation

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

using cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::Element = Element_

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

using cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::Fragment = Array<Element, Shape::kCount / kThreads>

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

using cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::Index = typename TensorRef::Index

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

using cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::InstructionShape = InstructionShape_

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

using cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::Layout = cutlass::layout::RowMajor

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

using cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::LongIndex = typename TensorRef::LongIndex

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

using cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::OpDelta = OpDelta_

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

using cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::Shape = Shape_

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

using cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::TensorCoord = typename TensorRef::TensorCoord

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

using cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::TensorRef = TensorRef<Element, Layout>

## Constructor & Destructor Documentation

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_HOST_DEVICE cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::MmaTensorOpAccumulatorTileIterator | ( |  | ) |
| inline

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_HOST_DEVICE cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::MmaTensorOpAccumulatorTileIterator | ( | TensorRef const & | ref,
|  | int | lane_id
| ) |  |
| inline

## Member Function Documentation

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_HOST_DEVICE MmaTensorOpAccumulatorTileIterator& cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::add_pointer_offset | ( | LongIndex | offset | ) |
| inline

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_HOST_DEVICE MmaTensorOpAccumulatorTileIterator& cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::add_tile_offset | ( | TensorCoord const & | tile_offset | ) |
| inline

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_HOST_DEVICE void cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::load | ( | Fragment & | frag | ) | const
| inline

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_DEVICE void cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::load | ( | Fragment & | frag,
|  | TensorCoord const & | tile_offset
| ) |  | const
| inline

< loads a tile with a logical offset in units of whole tiles

Parameters

  frag | fragment to load from the tensor

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_DEVICE void cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::load | ( | Fragment & | frag,
|  | TensorCoord const & | tile_offset,
|  | Index | pointer_offset
| ) |  | const
| inline

< loads a tile with a logical offset AND a pointer offset

Parameters

  frag | fragment to load from the tensor
  tile_offset | loads a tile with a logical offset in units of whole tiles

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_DEVICE void cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::load_with_byte_offset | ( | Fragment & | frag,
|  | Index | byte_offset
| ) |  | const
| inline

< loads a tile with a linear offset

Parameters

  frag | fragment to load from the tensor

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_DEVICE void cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::load_with_pointer_offset | ( | Fragment & | frag,
|  | Index | pointer_offset
| ) |  | const
| inline

< loads a tile with a linear offset

Parameters

  frag | fragment to load from the tensor

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_HOST_DEVICE MmaTensorOpAccumulatorTileIterator& cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::operator++ | ( |  | ) |
| inline

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_DEVICE MmaTensorOpAccumulatorTileIterator& cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::operator+= | ( | TensorCoord const & | tile_offset | ) |
| inline

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_HOST_DEVICE MmaTensorOpAccumulatorTileIterator& cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::operator-- | ( |  | ) |
| inline

advances in units of whole tiles along the logical coordinate space of the tensor

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_DEVICE MmaTensorOpAccumulatorTileIterator& cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::operator-= | ( | TensorCoord const & | tile_offset | ) |
| inline

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_HOST_DEVICE void cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::store | ( | Fragment const & | frag | ) | const
| inline

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_DEVICE void cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::store | ( | Fragment & | frag,
|  | TensorCoord const & | tile_offset
| ) |  | const
| inline

< stores a tile with a logical offset in units of whole tiles

Parameters

  frag | fragment to store to the tensor

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_DEVICE void cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::store | ( | Fragment const & | frag,
|  | TensorCoord const & | tile_offset,
|  | Index | pointer_offset
| ) |  | const
| inline

Parameters

  frag | fragment to store to the tensor
  tile_offset | stores a tile with a logical offset in units of whole tiles
  pointer_offset | stores a tile with a logical offset AND a pointer offset

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_DEVICE void cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::store_with_byte_offset | ( | Fragment const & | frag,
|  | Index | byte_offset
| ) |  | const
| inline

< store a tile with a linear offset

Parameters

  frag | fragment to store from the tensor

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

CUTLASS_DEVICE void cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::store_with_pointer_offset | ( | Fragment const & | frag,
|  | Index | pointer_offset
| ) |  | const
| inline

< store a tile with a linear offset

Parameters

  frag | fragment to store from the tensor

## Member Data Documentation

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

Operand const cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::kOperand = Operand::kC
| static

template<typename Shape_ , typename Element_ , typename InstructionShape_ , typename OpDelta_ >

int const cutlass::gemm::warp::MmaTensorOpAccumulatorTileIterator< Shape_, Element_, cutlass::layout::RowMajor, InstructionShape_, OpDelta_ >::kThreads = 32
| static

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

- mma_tensor_op_tile_iterator.h