volta_tensor_op_policy.h

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#pragma once

#include "cutlass/matrix_shape.h"
#include "cutlass/layout/matrix.h"
#include "cutlass/gemm/gemm.h"


namespace cutlass {
namespace epilogue {
namespace warp {


template <
  typename WarpShape,             
  typename InterleavedTileShape,  
  typename ElementC,              
  typename Layout                 
>
struct VoltaTensorOpPolicy; 


template <
  typename WarpShape_          
>
struct VoltaTensorOpPolicy<WarpShape_, gemm::GemmShape<32, 32, 4>, half_t, layout::RowMajor> {

  using WarpShape = WarpShape_;
  using InterleavedTileShape = gemm::GemmShape<32, 32, 4>;
  using ElementC = half_t;
  using Layout = layout::RowMajor;

  using InstructionShape = gemm::GemmShape<16, 16, 4>;

  using MmaIterations = MatrixShape<
    InterleavedTileShape::kM / InstructionShape::kM,
    InterleavedTileShape::kN / InstructionShape::kN
  >;

  using TileIterations = MatrixShape<
    WarpShape::kM / InterleavedTileShape::kM,
    WarpShape::kN / InterleavedTileShape::kN
  >;

  static int const kElementsPerMma = 8;
  static int const kRowsPerIteration = 16;

  //
  // Hard-coded constants regarding Tensor Operations
  //

  static int const kElementsPerAccess = 4;
  
  static int const kAccessesPerInterleavedTile = 4;

  static int const kIterations = TileIterations::kRow * 2;

  //
  // Derived types
  //

  using AccessType = AlignedArray<ElementC, kElementsPerAccess>;

  using Fragment = Array<
    ElementC, 
    kElementsPerAccess * kAccessesPerInterleavedTile * TileIterations::kColumn>;

  using AccumulatorTile = Array<
    ElementC, 
    TileIterations::kCount * MmaIterations::kCount * kElementsPerMma>;
};


template <
  typename WarpShape_          
>
struct VoltaTensorOpPolicy<WarpShape_, gemm::GemmShape<32, 32, 4>, float, layout::RowMajor> {

  using WarpShape = WarpShape_;
  using InterleavedTileShape = gemm::GemmShape<32, 32, 4>;
  using ElementC = float;
  using Layout = layout::RowMajor;

  using InstructionShape = gemm::GemmShape<16, 16, 4>;

  using MmaIterations = MatrixShape<
    InterleavedTileShape::kM / InstructionShape::kM,
    InterleavedTileShape::kN / InstructionShape::kN
  >;

  using TileIterations = MatrixShape<
    WarpShape::kM / InterleavedTileShape::kM,
    WarpShape::kN / InterleavedTileShape::kN
  >;

  static int const kElementsPerMma = 8;
  static int const kRowsPerIteration = 16;

  //
  // Hard-coded constants regarding Tensor Operations
  //

  static int const kElementsPerAccess = 2;
  
  static int const kAccessesPerInterleavedTile = 8;

  static int const kRowsPerMmaTile = 2;

  static int const kIterations = TileIterations::kRow * MmaIterations::kRow;

  //
  // Derived types
  //
  
  using AccessType = AlignedArray<ElementC, kElementsPerAccess>;

  using Fragment = Array<
    ElementC, 
    kElementsPerAccess * kAccessesPerInterleavedTile * TileIterations::kColumn>;

  using AccumulatorTile = Array<
    ElementC, 
    TileIterations::kCount * MmaIterations::kCount * kElementsPerMma>;
};


} // namespace warp
} // namespace epilogue
} // namespace cutlass