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/*
* 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
* 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_RUBY_FILTERS_BULKBLOOMFILTER_HH__
#define __MEM_RUBY_FILTERS_BULKBLOOMFILTER_HH__
#include <vector>
#include "mem/ruby/filters/AbstractBloomFilter.hh"
/**
* Implementation of the bloom filter, as described in "Bulk Disambiguation of
* Speculative Threads in Multiprocessors", by Ceze, Luis, et al.
*/
class BulkBloomFilter : public AbstractBloomFilter
{
public:
BulkBloomFilter(int size);
~BulkBloomFilter();
void set(Addr addr) override;
bool isSet(Addr addr) const override;
int getCount(Addr addr) const override;
private:
/** Permutes the address to generate its signature. */
Addr hash(Addr addr) const;
// split the filter bits in half, c0 and c1
const int sectorBits;
};
#endif // __MEM_RUBY_FILTERS_BULKBLOOMFILTER_HH__
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