66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
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#ifndef LRUPOLICY_H
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#define LRUPOLICY_H
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#include "AbstractReplacementPolicy.hh"
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/* Simple true LRU replacement policy */
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class LRUPolicy : public AbstractReplacementPolicy {
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public:
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LRUPolicy(Index num_sets, Index assoc);
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~LRUPolicy();
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void touch(Index set, Index way, Time time);
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Index getVictim(Index set) const;
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};
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inline
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LRUPolicy::LRUPolicy(Index num_sets, Index assoc)
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: AbstractReplacementPolicy(num_sets, assoc)
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{
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}
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inline
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LRUPolicy::~LRUPolicy()
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{
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}
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inline
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void LRUPolicy::touch(Index set, Index index, Time time){
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assert(index >= 0 && index < m_assoc);
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assert(set >= 0 && set < m_num_sets);
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m_last_ref_ptr[set][index] = time;
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}
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inline
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Index LRUPolicy::getVictim(Index set) const {
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// assert(m_assoc != 0);
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Time time, smallest_time;
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Index smallest_index;
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smallest_index = 0;
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smallest_time = m_last_ref_ptr[set][0];
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for (unsigned int i=0; i < m_assoc; i++) {
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time = m_last_ref_ptr[set][i];
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//assert(m_cache[cacheSet][i].m_Permission != AccessPermission_NotPresent);
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if (time < smallest_time){
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smallest_index = i;
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smallest_time = time;
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}
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}
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// DEBUG_EXPR(CACHE_COMP, MedPrio, cacheSet);
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// DEBUG_EXPR(CACHE_COMP, MedPrio, smallest_index);
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// DEBUG_EXPR(CACHE_COMP, MedPrio, m_cache[cacheSet][smallest_index]);
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// DEBUG_EXPR(CACHE_COMP, MedPrio, *this);
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return smallest_index;
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}
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#endif // PSEUDOLRUBITS_H
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