multi_bit_sel_bloom_filter.hh

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/*
 * Copyright (c) 2019 Inria
 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
 * 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
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#ifndef __BASE_FILTERS_MULTI_BIT_SEL_BLOOM_FILTER_HH__
#define __BASE_FILTERS_MULTI_BIT_SEL_BLOOM_FILTER_HH__
 
#include "base/filters/base.hh"
 
namespace gem5
{
 
struct BloomFilterMultiBitSelParams;
 
namespace bloom_filter
{

class MultiBitSel : public Base
{
  public:
    MultiBitSel(const BloomFilterMultiBitSelParams &p);
    ~MultiBitSel();
 
    void set(Addr addr) override;
    int getCount(Addr addr) const override;
 
  protected:
    virtual int hash(Addr addr, int hash_number) const;

    const int numHashes;

    const int parFilterSize;

    const bool isParallel;
 
  private:
    const int skipBits;
};
 
} // namespace bloom_filter
} // namespace gem5
 
#endif // __BASE_FILTERS_MULTI_BIT_SEL_BLOOM_FILTER_HH__