/*
// Copyright (c) 2016 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// 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.
*/

#pragma once

#include "fully_connected_kernel_base.h"

namespace kernel_selector 
{
    class FullyConnectedBlockKernelBase : public FullyConnectedKernelBase
    {
    public:
        using FullyConnectedKernelBase::FullyConnectedKernelBase;
        virtual ~FullyConnectedBlockKernelBase() {}

    protected:
        JitConstants GetJitConstants(const fully_connected_params& params, const DispatchData& kd) const override;

        // how many batches will a single work item compute
        static size_t GetBatchesPerWorkItem(const fully_connected_params& params)
        {
            auto batchSize = params.output.Batch().v;
            return std::min(batchSize, static_cast<size_t>(32U));
        }

        static size_t GetLocalGroupsSize(const fully_connected_params& params)
        {
            auto batchSize = params.output.Batch().v;
            return std::max(static_cast<size_t>(1U), batchSize / GetBatchesPerWorkItem(params));
        }

        // how many neurons for a single batch will a single work item produce 
        static size_t GetNeuronsPerWorkItem(const fully_connected_params& params)
        {
            auto batchSize = params.output.Batch().v;
            auto out_elements_count_per_batch = params.output.LogicalSize() / batchSize;
            if (out_elements_count_per_batch % 16 == 0)
                return 2;
            else
                return 1;
        }
    };
}