# if defined(__INTEL_COMPILER) || defined(_MSC_VER)
_mm_prefetch(addr, _MM_HINT_T0);
+ _mm_prefetch(addr+64, _MM_HINT_T0); // 64 bytes ahead
# else
__builtin_prefetch(addr);
+ __builtin_prefetch(addr+64);
# endif
}
if (hashMask == size - ClusterSize)
return;
- free(mem);
- mem = malloc(size * sizeof(TTEntry) + (CACHE_LINE_SIZE - 1));
- if (!mem)
+ hashMask = size - ClusterSize;
+ delete [] table;
+ table = new (std::nothrow) TTEntry[size];
+
+ if (!table)
{
std::cerr << "Failed to allocate " << mbSize
<< "MB for transposition table." << std::endl;
exit(EXIT_FAILURE);
}
- table = (TTEntry*)((size_t(mem) + CACHE_LINE_SIZE - 1) & ~(CACHE_LINE_SIZE - 1));
- hashMask = size - ClusterSize;
- clear(); // Newly allocated block of memory is not initialized
+ clear(); // Operator new is not guaranteed to initialize memory to zero
}
static const unsigned ClusterSize = 4; // A cluster is 64 Bytes
public:
- ~TranspositionTable() { free(mem); }
+ ~TranspositionTable() { delete [] table; }
void new_search() { generation++; }
TTEntry* probe(const Key key) const;
private:
uint32_t hashMask;
TTEntry* table;
- void* mem;
uint8_t generation; // Size must be not bigger then TTEntry::generation8
};
# include <xmmintrin.h> // Intel and Microsoft header for _mm_prefetch()
# endif
-#define CACHE_LINE_SIZE 64
#if defined(_MSC_VER) || defined(__INTEL_COMPILER)
-# define CACHE_LINE_ALIGNMENT __declspec(align(CACHE_LINE_SIZE))
+# define CACHE_LINE_ALIGNMENT __declspec(align(64))
#else
-# define CACHE_LINE_ALIGNMENT __attribute__ ((aligned(CACHE_LINE_SIZE)))
+# define CACHE_LINE_ALIGNMENT __attribute__ ((aligned(64)))
#endif
#if defined(_MSC_VER)