/**
 * \file dnn/src/common/lrn.cpp
 * MegEngine is Licensed under the Apache License, Version 2.0 (the "License")
 *
 * Copyright (c) 2014-2021 Megvii Inc. All rights reserved.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT ARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 */
#include "megdnn/oprs.h"

#include "src/common/utils.h"

namespace megdnn {

void LRNBase::check_param()
{
    megdnn_assert(param().n & 1);
}

void LRNForward::deduce_layout(const TensorLayout &src, TensorLayout &dst)
{
    dst = src;
}

void LRNForward::check_exec(const TensorLayout &src, const TensorLayout &dst,
        size_t workspace_in_bytes)
{
    check_param();
    megdnn_assert_contiguous(src);
    megdnn_assert_eq_layout(src, dst);

    megdnn_assert(src.dtype.category() == DTypeCategory::FLOAT);
    auto required_workspace_in_bytes = get_workspace_in_bytes(src, dst);
    megdnn_assert(workspace_in_bytes >= required_workspace_in_bytes);
}

void LRNBackward::check_exec(const TensorLayout &src,
        const TensorLayout &dst,
        const TensorLayout &diff,
        const TensorLayout &grad,
        size_t workspace_in_bytes)
{
    check_param();
    megdnn_assert_contiguous(src);
    megdnn_assert_eq_layout(src, dst);
    megdnn_assert_eq_layout(src, diff);
    megdnn_assert_eq_layout(src, grad);
    megdnn_assert(src.dtype.category() == DTypeCategory::FLOAT);
    auto required_workspace_in_bytes = get_workspace_in_bytes(src, dst,
            diff, grad);
    megdnn_assert(workspace_in_bytes >= required_workspace_in_bytes);
}

} // namespace megdnn
// vim: syntax=cpp.doxygen
