diff options
Diffstat (limited to 'qtmips_machine')
| -rw-r--r-- | qtmips_machine/cache.cpp | 27 | ||||
| -rw-r--r-- | qtmips_machine/cache.h | 9 |
2 files changed, 19 insertions, 17 deletions
diff --git a/qtmips_machine/cache.cpp b/qtmips_machine/cache.cpp index 8767ee1..742cdb5 100644 --- a/qtmips_machine/cache.cpp +++ b/qtmips_machine/cache.cpp @@ -71,18 +71,18 @@ Cache::Cache(MemoryAccess *m, const MachineConfigCache *cc, unsigned memory_acc switch (cnf.replacement_policy()) { case MachineConfigCache::RP_LFU: replc.lfu = new unsigned *[cnf.sets()]; - for (unsigned row = 0; row < cnf.sets(); row++) { + for (unsigned int row = 0; row < cnf.sets(); row++) { replc.lfu[row] = new unsigned[cnf.associativity()]; - for (int i = 0; i < cnf.associativity(); i++) - replc.lfu[row][i] = 0; + for (unsigned int i = 0; i < cnf.associativity(); i++) + replc.lfu[row][i] = 0; } break; case MachineConfigCache::RP_LRU: replc.lru = new time_t*[cnf.sets()]; - for (unsigned row = 0; row < cnf.sets(); row++) { + for (unsigned int row = 0; row < cnf.sets(); row++) { replc.lru[row] = new time_t[cnf.associativity()]; - for (int i = 0; i < cnf.associativity(); i++) - replc.lru[row][i] = 0; + for (unsigned int i = 0; i < cnf.associativity(); i++) + replc.lru[row][i] = 0; } default: break; @@ -219,11 +219,8 @@ const MachineConfigCache &Cache::config() const { } enum LocationStatus Cache::location_status(std::uint32_t address) const { - address = address >> 2; - unsigned ssize = cnf.blocks() * cnf.sets(); - std::uint32_t tag = address / ssize; - std::uint32_t index = address % ssize; - std::uint32_t row = index / cnf.blocks(); + std::uint32_t row, col, tag; + compute_row_col_tag(row, col, tag, address); if (cnf.enabled()) { for (unsigned indx = 0; indx < cnf.associativity(); indx++) { @@ -241,12 +238,8 @@ enum LocationStatus Cache::location_status(std::uint32_t address) const { bool Cache::access(std::uint32_t address, std::uint32_t *data, bool write, std::uint32_t value) const { bool changed = false; - address = address >> 2; - unsigned ssize = cnf.blocks() * cnf.sets(); - std::uint32_t tag = address / ssize; - std::uint32_t index = address % ssize; - std::uint32_t row = index / cnf.blocks(); - std::uint32_t col = index % cnf.blocks(); + std::uint32_t row, col, tag; + compute_row_col_tag(row, col, tag, address); unsigned indx = 0; // Try to locate exact block or some unused one diff --git a/qtmips_machine/cache.h b/qtmips_machine/cache.h index 6027bd3..d08e66a 100644 --- a/qtmips_machine/cache.h +++ b/qtmips_machine/cache.h @@ -101,6 +101,15 @@ private: void kick(unsigned associat_indx, unsigned row) const; std::uint32_t base_address(std::uint32_t tag, unsigned row) const; void update_statistics() const; + inline void compute_row_col_tag(std::uint32_t &row, std::uint32_t &col, + std::uint32_t &tag, std::uint32_t address) const { + address = address >> 2; + std::uint32_t ssize = cnf.blocks() * cnf.sets(); + tag = address / ssize; + std::uint32_t index = address % ssize; + row = index / cnf.blocks(); + col = index % cnf.blocks(); + } }; } |