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Code Issues Releases Wiki Activity

Fix pawn entry prefetch

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No functional change

Closes #1026
This commit is contained in:
mstembera 2017-03-14 20:56:26 -07:00 • committed by Joona Kiiski
parent c3d2e6aba9
commit d01b66ae8f
3 changed files with 8 additions and 1 deletions
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6
src/misc.cpp
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@ -205,6 +205,12 @@ void prefetch(void* addr) {
#endif #endif
void prefetch2(void* addr) {
prefetch(addr);
prefetch((uint8_t*)addr + 64);
}
namespace WinProcGroup { namespace WinProcGroup {
#ifndef _WIN32 #ifndef _WIN32

1
src/misc.h
View file

@ -31,6 +31,7 @@
const std::string engine_info(bool to_uci = false); const std::string engine_info(bool to_uci = false);
void prefetch(void* addr); void prefetch(void* addr);
void prefetch2(void* addr);
void start_logger(const std::string& fname); void start_logger(const std::string& fname);
void dbg_hit_on(bool b); void dbg_hit_on(bool b);

2
src/position.cpp
View file

@ -827,7 +827,7 @@ void Position::do_move(Move m, StateInfo& newSt, bool givesCheck) {
// Update pawn hash key and prefetch access to pawnsTable // Update pawn hash key and prefetch access to pawnsTable
st->pawnKey ^= Zobrist::psq[pc][from] ^ Zobrist::psq[pc][to]; st->pawnKey ^= Zobrist::psq[pc][from] ^ Zobrist::psq[pc][to];
prefetch(thisThread->pawnsTable[st->pawnKey]); prefetch2(thisThread->pawnsTable[st->pawnKey]);
// Reset rule 50 draw counter // Reset rule 50 draw counter
st->rule50 = 0; st->rule50 = 0;