/*
 * Copyright (c) 2017-2020 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/NEON/functions/NEArithmeticSubtraction.h"

#include "arm_compute/core/ITensor.h"
#include "arm_compute/core/NEON/kernels/NEArithmeticSubtractionKernel.h"
#include "support/MemorySupport.h"

#include <utility>

namespace arm_compute
{
namespace experimental
{
void NEArithmeticSubtraction::configure(const ITensorInfo *input1, const ITensorInfo *input2, ITensorInfo *output, ConvertPolicy policy, const ActivationLayerInfo &act_info)
{
    ARM_COMPUTE_UNUSED(act_info);
    auto k = arm_compute::support::cpp14::make_unique<NEArithmeticSubtractionKernel>();
    k->configure(input1, input2, output, policy);
    _kernel = std::move(k);
}

Status NEArithmeticSubtraction::validate(const ITensorInfo *input1, const ITensorInfo *input2, const ITensorInfo *output, ConvertPolicy policy, const ActivationLayerInfo &act_info)
{
    ARM_COMPUTE_RETURN_ERROR_ON(act_info.enabled());
    return NEArithmeticSubtractionKernel::validate(input1, input2, output, policy);
}

MemoryRequirements NEArithmeticSubtraction::workspace() const
{
    return MemoryRequirements{};
}
} // namespace experimental

struct NEArithmeticSubtraction::Impl
{
    const ITensor                                         *src_0{ nullptr };
    const ITensor                                         *src_1{ nullptr };
    ITensor                                               *dst{ nullptr };
    std::unique_ptr<experimental::NEArithmeticSubtraction> op{ nullptr };
};

NEArithmeticSubtraction::NEArithmeticSubtraction()
    : _impl(support::cpp14::make_unique<Impl>())
{
}
NEArithmeticSubtraction::NEArithmeticSubtraction(NEArithmeticSubtraction &&) = default;
NEArithmeticSubtraction &NEArithmeticSubtraction::operator=(NEArithmeticSubtraction &&) = default;
NEArithmeticSubtraction::~NEArithmeticSubtraction()                                     = default;

Status NEArithmeticSubtraction::validate(const ITensorInfo *input1, const ITensorInfo *input2, const ITensorInfo *output, ConvertPolicy policy, const ActivationLayerInfo &act_info)
{
    return experimental::NEArithmeticSubtraction::validate(input1, input2, output, policy, act_info);
}

void NEArithmeticSubtraction::configure(const ITensor *input1, const ITensor *input2, ITensor *output, ConvertPolicy policy, const ActivationLayerInfo &act_info)
{
    _impl->src_0 = input1;
    _impl->src_1 = input2;
    _impl->dst   = output;
    _impl->op    = arm_compute::support::cpp14::make_unique<experimental::NEArithmeticSubtraction>();
    _impl->op->configure(input1->info(), input2->info(), output->info(), policy, act_info);
}

void NEArithmeticSubtraction::run()
{
    const InputTensorMap  src{ { TensorType::ACL_SRC_0, _impl->src_0 }, { TensorType::ACL_SRC_1, _impl->src_1 } };
    const OutputTensorMap dst{ { TensorType::ACL_DST, _impl->dst } };
    _impl->op->run(src, dst, {});
}
} // namespace arm_compute