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/***************************************************************************************************
* Copyright (c) 2017-2018, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted
* provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
* * Neither the name of the NVIDIA CORPORATION nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TOR (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
**************************************************************************************************/
/*! \file
\brief Defines structural properties of WMMA GEMM's epilogue phase.
*/
#pragma once
#include <cutlass/wmma_matrix.h>
#ifdef CUTLASS_USE_WMMA_API
#include <cutlass/convert.h>
#include <cutlass/coord.h>
#include <cutlass/gemm/gemm_global_stream.h>
#include <cutlass/gemm/gemm_shared_stream.h>
#include <cutlass/gemm/linear_scaling.h>
#include <cutlass/gemm/wmma_gemm_global_tile.h>
#include <cutlass/gemm/wmma_gemm_shared_tile.h>
#include <cutlass/reshape_tile.h>
#include <cutlass/tile_iterator.h>
namespace cutlass {
namespace gemm {
////////////////////////////////////////////////////////////////////////////////////////////////////
template <typename GemmConfig_, typename EpilogueFunctor_, typename Index_ = int>
struct WmmaGemmEpilogueTraitsHelper {
/// The scalar.
typedef typename EpilogueFunctor_::Scalar Scalar;
/// The output tile.
typedef typename GemmConfig_::OutputTile OutputTile;
/// The number of WMMAs in the H dimension.
static int const kWmmasPerH =
GemmConfig_::AccumulatorsPerWarp::kH / GemmConfig_::InstructionShape::kH;
/// The number of iterations in the epilogue. That's the number of "horizontal" WMMAs.
typedef Shape<1, 1, kWmmasPerH> Iterations;
// The iteration strides in the H/W dimension.
typedef Shape<0, 0, 0> Delta;
/// The functor to do the math in the epilogue.
typedef EpilogueFunctor_ Functor;
/// The traits class to build the iterator to store to shared memory for D.
typedef WmmaGemmSharedStoreTileDTraits<
// The output layout.
MatrixLayout::kColumnMajor,
// The pointer is float.
typename Functor::Scalar,
// The output tile size.
typename GemmConfig_::OutputTile,
// The number of warps.
typename GemmConfig_::Warps,
// The shape of the instruction.
typename GemmConfig_::InstructionShape>
SharedStoreTileTraits;
typedef WmmaMatrix<GemmOperand::kC,
MatrixLayout::kColumnMajor,
Scalar,
typename GemmConfig_::InstructionShape>
WmmaMatrix;
/// The iterator to store D to shared memory.
typedef TileStoreIterator<SharedStoreTileTraits,
typename SharedStoreTileTraits::Scalar,
IteratorAdvance::kH,
MemorySpace::kShared,
Index_,
WmmaMatrix,
IteratorFragment::kWmmaMatrix>
SharedStoreIteratorD;
/// The shared store transformer for D.
typedef Copy<typename SharedStoreIteratorD::Fragment> SharedStoreTransformerD;
/// The traits class to build the iterator to load from shared memory for D.
typedef WmmaGemmSharedLoadTileDTraits<
// The pointer.
typename Functor::Scalar,
// The tile size.
typename SharedStoreIteratorD::Tile,
// The number of threads.
Shape<1, ShapeCount<typename GemmConfig_::Warps>::kCount, GemmConfig_::kWarpSize>,
// The number of scalars per LDS.
GemmConfig_::kScalarsPerLdsD>
SharedLoadTileTraits;
/// The iterator to load D from shared memory.
typedef TileLoadIterator<SharedLoadTileTraits,
typename SharedLoadTileTraits::Scalar,
IteratorAdvance::kH,
MemorySpace::kShared>
SharedLoadIteratorD;
/// The traits class to build the iterator to load data from global memory for C^N.
typedef WmmaGemmGlobalIteratorCdTraits<
// The pointer is float const.
typename GemmConfig_::ScalarC const,
// The tile has size (N / Iterations)xM in GEMM's terminology.
Shape<1,
GemmConfig_::OutputTile::kH / ShapeCount<Iterations>::kCount,
GemmConfig_::OutputTile::kW>,
// The threads are distributed as warps x 32 (the traits may reorganize).
Shape<1, ShapeCount<typename GemmConfig_::Warps>::kCount, GemmConfig_::kWarpSize>,
// The number of scalars per LDG (LDG.32 or LDG.128, etc).
GemmConfig_::kScalarsPerLdgC>
GlobalLoadTileTraits;
/// The iterator to load C.
typedef WmmaGemmGlobalIteratorCd<GlobalLoadTileTraits, Index_> GlobalLoadIteratorC;
/// The transformer for C.
typedef Copy<typename GlobalLoadIteratorC::Fragment> GlobalTransformerC;
/// The traits class to build the iterator to store data to global memory for D^N.
typedef WmmaGemmGlobalIteratorCdTraits<
// The pointer is float.
typename GemmConfig_::ScalarD,
// The tile has size (N / Iterations)xM in GEMM's terminology.
Shape<1,
GemmConfig_::OutputTile::kH / ShapeCount<Iterations>::kCount,
GemmConfig_::OutputTile::kW>,
// The threads are distributed as warps x 32 (the traits may reorganize).
Shape<1, ShapeCount<typename GemmConfig_::Warps>::kCount, GemmConfig_::kWarpSize>,
// The number of scalars per LDG (LDG.32 or LDG.128, etc).
GemmConfig_::kScalarsPerStgD>
GlobalStoreTileTraits;
/// The iterator to store D.
typedef WmmaGemmGlobalIteratorCd<GlobalStoreTileTraits, Index_> GlobalStoreIteratorD;
/// The transformer for D.
typedef Copy<typename GlobalStoreIteratorD::Fragment> GlobalTransformerD;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
} // namespace gemm
} // namespace cutlass
#endif // defined CUTLASS_USE_WMMA_API
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