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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 abstractions for managing loading and storing fragments to shared memory in the
efficient GEMM pipeline.
*/
#pragma once
#include <cutlass/gemm/gemm_shared_tile.h>
namespace cutlass {
namespace gemm {
////////////////////////////////////////////////////////////////////////////////////////////////////
template <
/// The load iterator.
typename Iterator_,
/// The transformer to be applied after the data has been copied from shared memory.
typename Transformer_ = Copy<typename Iterator_::Fragment> >
struct SharedLoadStream {
/// The load iterator.
typedef Iterator_ Iterator;
/// The transformer.
typedef Transformer_ Transformer;
/// The fragment that is copied from shared memory.
typedef typename Iterator::Fragment FetchedFragment;
/// The fragment that is obtained after the transformation by the transformer.
typedef typename Transformer::OutputFragment TransformedFragment;
/// Make sure the fragments match.
static_assert((platform::is_same<FetchedFragment, typename Transformer::InputFragment>::value),
"");
/// The output fragment.
typedef TransformedFragment Fragment;
/// The params.
struct Params {
/// The iterator params.
typename Iterator::Params iterator;
/// Setup the params.
CUTLASS_HOST_DEVICE int initialize() { return iterator.initialize(); }
};
/// The storage in shared memory needed by that stream.
typedef typename Iterator::Storage SharedStorage;
/// Ctor.
CUTLASS_DEVICE SharedLoadStream() {}
/// Ctor.
CUTLASS_DEVICE SharedLoadStream(Params const ¶ms, SharedStorage &shared_storage) {
this->initialize(params, shared_storage);
}
/// Initialize the stream.
CUTLASS_DEVICE void initialize(Params const ¶ms, SharedStorage &shared_storage) {
// The iterator.
iterator = Iterator(params.iterator, shared_storage);
// The transformer.
transformer = Transformer();
}
/// Load the data from shared memory to the fetch fragment.
CUTLASS_DEVICE void copy(FetchedFragment &fetched) { shared_iterator_load(iterator, fetched); }
/// Load the data from shared memory to the fetch fragment.
CUTLASS_DEVICE void copy(int d, FetchedFragment &fetched) {
shared_iterator_load(iterator, fetched, d);
}
/// Commit the data.
CUTLASS_DEVICE void commit(FetchedFragment &fetched, TransformedFragment &transformed) {
transformer.transform(fetched, transformed);
}
/// Increment the stage.
CUTLASS_DEVICE void inc_stage() { iterator.inc_stage(); }
/// The iterator.
Iterator iterator;
/// The transformer.
Transformer transformer;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
} // namespace gemm
} // namespace cutlass
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