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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 Tile traits used to construct global tile iterator for HGEMM. This is intended to
+ partition the thread block-level tile into 2D subtiles loaded by the threads and facilitate
+ memory accesses larger than 16 bits.
+*/
+#pragma once
+
+#include <cutlass/coord.h>
+#include <cutlass/gemm/gemm_global_tile.h>
+#include <cutlass/matrix_traits.h>
+#include <cutlass/reshape_tile.h>
+
+namespace cutlass {
+namespace gemm {
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template <GemmOperand::Kind kOperand_,
+ MatrixLayout::Kind kLayout_,
+ typename Scalar_,
+ typename Tile_,
+ typename Threads_,
+ int kAccessSize_>
+struct HgemmCrosswiseGlobalTileTraits : public GemmGlobalTileTraits<
+ // Which GEMM operand?
+ kOperand_,
+ // The layout.
+ kLayout_,
+ // The scalar.
+ Scalar_,
+ // The tile.
+ Tile_,
+ // The threads.
+ Threads_,
+ // The number of scalars per LDG/STG.
+ kAccessSize_> {
+ /// The base class.
+ typedef GemmGlobalTileTraits<kOperand_, kLayout_, Scalar_, Tile_, Threads_, kAccessSize_> Base;
+ /// The threads.
+ typedef typename Base::Threads Threads;
+ /// The threads strides.
+ typedef Shape<1, 2, Base::Tile::kC> ThreadsDelta;
+ /// The strides in each dimension between different loads/stores.
+ typedef Shape<Base::Threads::kH * 2, 1, Base::Threads::kW, Base::kAccessSize> Delta;
+ /// The number of iterations needed to load/store the tile.
+ typedef Shape<Base::Tile::kH / Base::Threads::kH / 2,
+ 2,
+ Base::Tile::kW / Base::Threads::kW,
+ Base::Tile::kC / Base::kAccessSize>
+ Iterations;
+ /// Computes the thread offset in (H, W) based on thread ID
+ struct ThreadOffset {
+ CUTLASS_HOST_DEVICE
+ Coord<4> operator()() const {
+ int thread_offset_h = threadIdx.x / Threads::kW * ThreadsDelta::kH;
+ int thread_offset_w = threadIdx.x % Threads::kW * ThreadsDelta::kW;
+
+ return make_Coord(0, thread_offset_h, thread_offset_w, 0);
+ }
+ };
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+} // namespace gemm
+} // namespace cutlass