////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2014-2023, Lawrence Livermore National Security, LLC.
// Produced at the Lawrence Livermore National Laboratory.
// Written by the LBANN Research Team (B. Van Essen, et al.) listed in
// the CONTRIBUTORS file. <lbann-dev@llnl.gov>
//
// LLNL-CODE-697807.
// All rights reserved.
//
// This file is part of LBANN: Livermore Big Artificial Neural Network
// Toolkit. For details, see http://software.llnl.gov/LBANN or
// https://github.com/LLNL/LBANN.
//
// Licensed under the Apache License, Version 2.0 (the "Licensee"); you
// may not use this file except in compliance with the License.  You may
// obtain a copy of the License at:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the license.
////////////////////////////////////////////////////////////////////////////////

#include <lbann/layers/math/math_builders.hpp>
#include <lbann/layers/math/matmul.hpp>

#include "lbann/proto/layers.pb.h"
#include <lbann/proto/proto_common.hpp>

namespace lbann {

template <typename TensorDataType, data_layout Layout, El::Device Device>
std::unique_ptr<Layer>
build_matmul_layer_from_pbuf(lbann_comm* comm,
                             lbann_data::Layer const& proto_layer)
{
  LBANN_ASSERT_MSG_HAS_FIELD(proto_layer, matmul);
  if constexpr (Layout == data_layout::DATA_PARALLEL) {
    using LayerType = matmul_layer<TensorDataType, Layout, Device>;
    const auto& params = proto_layer.matmul();
    return std::make_unique<LayerType>(comm,
                                       params.transpose_a(),
                                       params.transpose_b());
  }
  else {
    (void)comm;
    (void)proto_layer;
    LBANN_ERROR("matrix multiply layer is only supported with "
                "a data-parallel layout");
  }
}

#define PROTO_DEVICE(T, D) LBANN_LAYER_BUILDER_ETI(matmul, T, D)
#include <lbann/macros/instantiate_device.hpp>
} // namespace lbann
