/*
 * 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 "src/gpu/cl/operators/ClGemmLowpOutputStage.h"

#include "arm_compute/core/CL/ICLTensor.h"
#include "arm_compute/core/Types.h"
#include "arm_compute/runtime/CL/CLScheduler.h"

#include "src/common/utils/Log.h"
#include "src/gpu/cl/kernels/ClGemmLowpQuantizeDownInt32ScaleByFixedPointKernel.h"
#include "src/gpu/cl/kernels/ClGemmLowpQuantizeDownInt32ScaleByFloatKernel.h"
#include "src/gpu/cl/kernels/ClGemmLowpQuantizeDownInt32ScaleKernel.h"

namespace arm_compute
{
namespace opencl
{
void ClGemmLowpOutputStage::configure(const CLCompileContext        &compile_context,
                                      const ITensorInfo             *src,
                                      const ITensorInfo             *bias,
                                      ITensorInfo                   *dst,
                                      const GEMMLowpOutputStageInfo &info)
{
    ARM_COMPUTE_ERROR_ON_NULLPTR(src, dst);
    ARM_COMPUTE_LOG_PARAMS(src, bias, dst, info);

    switch (info.type)
    {
        case GEMMLowpOutputStageType::QUANTIZE_DOWN_FIXEDPOINT:
        {
            auto k = std::make_unique<opencl::kernels::ClGemmLowpQuantizeDownInt32ScaleByFixedPointKernel>();
            k->configure(compile_context, src, bias, dst, &info);
            _kernel = std::move(k);
            break;
        }
        case GEMMLowpOutputStageType::QUANTIZE_DOWN:
        {
            auto k = std::make_unique<opencl::kernels::ClGemmLowpQuantizeDownInt32ScaleKernel>();
            k->configure(compile_context, src, bias, dst, &info);
            _kernel = std::move(k);
            break;
        }
        case GEMMLowpOutputStageType::QUANTIZE_DOWN_FLOAT:
        {
            auto k = std::make_unique<opencl::kernels::ClGemmLowpQuantizeDownInt32ScaleByFloatKernel>();
            k->configure(compile_context, src, bias, dst, &info);
            _kernel = std::move(k);
            break;
        }
        default:
            ARM_COMPUTE_ERROR("Unsupported GEMMLowpOutputStage type.");
    }
}

Status ClGemmLowpOutputStage::validate(const ITensorInfo             *src,
                                       const ITensorInfo             *bias,
                                       const ITensorInfo             *dst,
                                       const GEMMLowpOutputStageInfo &info)
{
    ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(dst);
    ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(dst, 1, DataType::QASYMM8, DataType::QASYMM8_SIGNED,
                                                         DataType::QSYMM16);

    switch (info.type)
    {
        case GEMMLowpOutputStageType::QUANTIZE_DOWN_FIXEDPOINT:
            return opencl::kernels::ClGemmLowpQuantizeDownInt32ScaleByFixedPointKernel::validate(src, bias, dst, &info);
        case GEMMLowpOutputStageType::QUANTIZE_DOWN:
            return opencl::kernels::ClGemmLowpQuantizeDownInt32ScaleKernel::validate(src, bias, dst, &info);
        case GEMMLowpOutputStageType::QUANTIZE_DOWN_FLOAT:
            return opencl::kernels::ClGemmLowpQuantizeDownInt32ScaleByFloatKernel::validate(src, bias, dst, &info);
        default:
            return ARM_COMPUTE_CREATE_ERROR(ErrorCode::RUNTIME_ERROR, "Unsupported GEMMLowpOutputStage type.");
    }
}

void ClGemmLowpOutputStage::run(ITensorPack &tensors)
{
    const ITensor *src  = tensors.get_const_tensor(ACL_SRC);
    const ITensor *bias = tensors.get_const_tensor(ACL_BIAS);
    ITensor       *dst  = tensors.get_tensor(ACL_DST);

    ITensorPack pack{{ACL_SRC, src}, {ACL_BIAS, bias}, {ACL_DST, dst}};
    CLScheduler::get().enqueue_op(*_kernel, pack, true);
}
} // namespace opencl
} // namespace arm_compute