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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 a type for restructuring a tile.
*/
#pragma once
#include <cutlass/shape.h>
namespace cutlass {
////////////////////////////////////////////////////////////////////////////////////////////////////
// The following functor reshapes a tile of data. The goal is to have at least kAccessSize in
// the inner-most dimension. If the user respects that constraint, there is nothing to be done. If
// that's not the case, this functor will correct that and "extract" the right number of elements
// from the next dimension.
template <typename Tile_, int kAccessSize_, bool = (Tile_::kC < kAccessSize_)>
struct ReshapeTile {
typedef Tile_ Tile;
};
template <typename Tile_, int kAccessSize_>
struct ReshapeTile<Tile_, kAccessSize_, true> {
// Make sure the W dimension of the tile is large enough.
static_assert(Tile_::kW >= kAccessSize_, "The W dimension is too small");
// Make sure the dimension can be divided by the number of scalars.
static_assert(Tile_::kW % kAccessSize_ == 0, "Not supported");
// Collapse the W dimension.
typedef Shape<Tile_::kD, Tile_::kH, Tile_::kW / kAccessSize_, kAccessSize_> Tile;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
} // namespace cutlass
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