multi.hh

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/*
 * Copyright (c) 2019-2020 Inria
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#ifndef __MEM_CACHE_COMPRESSORS_MULTI_HH__
#define __MEM_CACHE_COMPRESSORS_MULTI_HH__
 
#include <cstdint>
#include <vector>
 
#include "base/statistics.hh"
#include "base/types.hh"
#include "mem/cache/compressors/base.hh"
 
struct MultiCompressorParams;
 
namespace Compressor {
 
class Multi : public Base
{
  protected:
    class MultiCompData;
 
    std::vector<Base*> compressors;
 
    const std::size_t numEncodingBits;
 
    const Cycles extraDecompressionLatency;
 
    struct MultiStats : public Stats::Group
    {
        const Multi& compressor;
 
        MultiStats(BaseStats &base_group, Multi& _compressor);
 
        void regStats() override;
 
        Stats::Vector2d ranks;
    } multiStats;
 
  public:
    typedef MultiCompressorParams Params;
    Multi(const Params &p);
    ~Multi();
 
    void setCache(BaseCache *_cache) override;
 
    std::unique_ptr<Base::CompressionData> compress(
        const std::vector<Base::Chunk>& chunks,
        Cycles& comp_lat, Cycles& decomp_lat) override;
 
    void decompress(const CompressionData* comp_data, uint64_t* data) override;
};
 
class Multi::MultiCompData : public CompressionData
{
  private:
    const uint8_t index;
 
  public:
    std::unique_ptr<Base::CompressionData> compData;
 
    MultiCompData(unsigned index,
        std::unique_ptr<Base::CompressionData> comp_data);
 
    ~MultiCompData() = default;
 
    uint8_t getIndex() const;
};
 
} // namespace Compressor
 
#endif //__MEM_CACHE_COMPRESSORS_MULTI_HH__