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Revert "Cache line aligned TT"

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This reverts commit 083fe58124

It seems to break Android build

No functional change.
This commit is contained in:
Marco Costalba 2013-04-30 08:08:54 +02:00
parent 06b9140e5c
commit 293c44bc09
4 changed files with 11 additions and 11 deletions
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2
src/misc.cpp
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@ -237,8 +237,10 @@ void prefetch(char* addr) {
# if defined(__INTEL_COMPILER) || defined(_MSC_VER) # if defined(__INTEL_COMPILER) || defined(_MSC_VER)
_mm_prefetch(addr, _MM_HINT_T0); _mm_prefetch(addr, _MM_HINT_T0);
_mm_prefetch(addr+64, _MM_HINT_T0); // 64 bytes ahead
# else # else
__builtin_prefetch(addr); __builtin_prefetch(addr);
__builtin_prefetch(addr+64);
# endif # endif
} }

12
src/tt.cpp
View file

@ -39,18 +39,18 @@ void TranspositionTable::set_size(size_t mbSize) {
if (hashMask == size - ClusterSize) if (hashMask == size - ClusterSize)
return; return;
free(mem); hashMask = size - ClusterSize;
mem = malloc(size * sizeof(TTEntry) + (CACHE_LINE_SIZE - 1)); delete [] table;
if (!mem) table = new (std::nothrow) TTEntry[size];
if (!table)
{ {
std::cerr << "Failed to allocate " << mbSize std::cerr << "Failed to allocate " << mbSize
<< "MB for transposition table." << std::endl; << "MB for transposition table." << std::endl;
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
table = (TTEntry*)((size_t(mem) + CACHE_LINE_SIZE - 1) & ~(CACHE_LINE_SIZE - 1)); clear(); // Operator new is not guaranteed to initialize memory to zero
hashMask = size - ClusterSize;
clear(); // Newly allocated block of memory is not initialized
} }

3
src/tt.h
View file

@ -85,7 +85,7 @@ class TranspositionTable {
static const unsigned ClusterSize = 4; // A cluster is 64 Bytes static const unsigned ClusterSize = 4; // A cluster is 64 Bytes
public: public:
~TranspositionTable() { free(mem); } ~TranspositionTable() { delete [] table; }
void new_search() { generation++; } void new_search() { generation++; }
TTEntry* probe(const Key key) const; TTEntry* probe(const Key key) const;
@ -98,7 +98,6 @@ public:
private: private:
uint32_t hashMask; uint32_t hashMask;
TTEntry* table; TTEntry* table;
void* mem;
uint8_t generation; // Size must be not bigger then TTEntry::generation8 uint8_t generation; // Size must be not bigger then TTEntry::generation8
}; };

5
src/types.h
View file

@ -56,11 +56,10 @@
# include <xmmintrin.h> // Intel and Microsoft header for _mm_prefetch() # include <xmmintrin.h> // Intel and Microsoft header for _mm_prefetch()
# endif # endif
#define CACHE_LINE_SIZE 64
#if defined(_MSC_VER) || defined(__INTEL_COMPILER) #if defined(_MSC_VER) || defined(__INTEL_COMPILER)
# define CACHE_LINE_ALIGNMENT __declspec(align(CACHE_LINE_SIZE)) # define CACHE_LINE_ALIGNMENT __declspec(align(64))
#else #else
# define CACHE_LINE_ALIGNMENT __attribute__ ((aligned(CACHE_LINE_SIZE))) # define CACHE_LINE_ALIGNMENT __attribute__ ((aligned(64)))
#endif #endif
#if defined(_MSC_VER) #if defined(_MSC_VER)