perfect.hh

Go to the documentation of this file.

/*
 * Copyright (c) 2019-2020 Inria
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef __MEM_CACHE_COMPRESSORS_PERFECT_COMPRESSOR_HH__
#define __MEM_CACHE_COMPRESSORS_PERFECT_COMPRESSOR_HH__
 
#include <cstdint>
#include <memory>
#include <vector>
 
#include "base/types.hh"
#include "mem/cache/compressors/base.hh"
 
namespace gem5
{
 
struct PerfectCompressorParams;
 
GEM5_DEPRECATED_NAMESPACE(Compressor, compression);
namespace compression
{
 
class Perfect : public Base
{
  protected:
    class CompData;
 
    const int compressedSize;
 
    const Cycles compressionLatency;
 
    const Cycles decompressionLatency;
 
    std::unique_ptr<CompressionData> compress(
        const std::vector<Chunk>& chunks, Cycles& comp_lat,
        Cycles& decomp_lat) override;
 
    void decompress(const CompressionData* comp_data, uint64_t* data) override;
 
  public:
    typedef PerfectCompressorParams Params;
    Perfect(const Params &p);
    ~Perfect() = default;
};
 
class Perfect::CompData : public CompressionData
{
  public:
    std::vector<Chunk> chunks;
 
    CompData(const std::vector<Chunk>& chunks)
      : CompressionData(), chunks(chunks)
    {
    }
    ~CompData() = default;
};
 
} // namespace compression
} // namespace gem5
 
#endif //__MEM_CACHE_COMPRESSORS_PERFECT_COMPRESSOR_HH__