/*
 * Copyright (c) 2017-2021 Arm Limited.
 *
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#include "arm_compute/runtime/CL/functions/CLSoftmaxLayer.h"

#include "arm_compute/core/CL/CLHelpers.h"
#include "arm_compute/core/CL/CLKernelLibrary.h"
#include "arm_compute/core/Helpers.h"
#include "arm_compute/core/KernelDescriptors.h"
#include "arm_compute/core/Types.h"
#include "arm_compute/core/Utils.h"

#include "src/core/helpers/MemoryHelpers.h"
#include "src/gpu/cl/kernels/ClSoftmaxKernel.h"
#include "src/gpu/cl/operators/ClPermute.h"
#include "src/gpu/cl/operators/ClSoftmax.h"

namespace arm_compute
{
using OperatorType = opencl::ClSoftmax;

template <bool IS_LOG>
struct CLSoftmaxLayerGeneric<IS_LOG>::Impl
{
    const ICLTensor              *src{nullptr};
    ICLTensor                    *dst{nullptr};
    std::unique_ptr<OperatorType> op{nullptr};
    MemoryGroup                   memory_group{};
    ITensorPack                   run_pack{};
    WorkspaceData<CLTensor>       workspace_tensors{};
};

template <bool IS_LOG>
CLSoftmaxLayerGeneric<IS_LOG>::CLSoftmaxLayerGeneric(std::shared_ptr<IMemoryManager> memory_manager)
    : _impl(std::make_unique<Impl>())
{
    _impl->memory_group = MemoryGroup(std::move(memory_manager));
}

template <bool IS_LOG>
CLSoftmaxLayerGeneric<IS_LOG>::~CLSoftmaxLayerGeneric() = default;

template <bool IS_LOG>
void CLSoftmaxLayerGeneric<IS_LOG>::configure(const ICLTensor *input, ICLTensor *output, float beta, int32_t axis)
{
    configure(CLKernelLibrary::get().get_compile_context(), input, output, beta, axis);
}

template <bool IS_LOG>
void CLSoftmaxLayerGeneric<IS_LOG>::configure(
    const CLCompileContext &compile_context, const ICLTensor *input, ICLTensor *output, float beta, int32_t axis)
{
    _impl->src = input;
    _impl->dst = output;
    _impl->op  = std::make_unique<OperatorType>();

    SoftmaxKernelInfo softmax_info{beta, IS_LOG, input->info()->data_type(), axis};
    _impl->op->configure(compile_context, *input->info(), *output->info(), softmax_info);

    _impl->run_pack          = {{TensorType::ACL_SRC, _impl->src}, {TensorType::ACL_DST, _impl->dst}};
    _impl->workspace_tensors = manage_workspace<CLTensor>(_impl->op->workspace(), _impl->memory_group, _impl->run_pack);
}

template <bool IS_LOG>
Status
CLSoftmaxLayerGeneric<IS_LOG>::validate(const ITensorInfo *input, const ITensorInfo *output, float beta, int32_t axis)
{
    SoftmaxKernelInfo softmax_info{beta, IS_LOG, input->data_type(), axis};
    return OperatorType::validate(*input, *output, softmax_info);
}

template <bool IS_LOG>
void CLSoftmaxLayerGeneric<IS_LOG>::run()
{
    // Acquire all the temporaries
    MemoryGroupResourceScope scope_mg(_impl->memory_group);
    ARM_COMPUTE_ERROR_ON_NULLPTR(_impl->src, _impl->dst);
    _impl->op->run(_impl->run_pack);
}

template class CLSoftmaxLayerGeneric<false>;
template class CLSoftmaxLayerGeneric<true>;

} // namespace arm_compute