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Consistent TT replace policy

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This fixes an inconsistency bug where TT entries were valued differently
depending on which pointer they were accessed through.

STC 2MB
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 11301 W: 2176 L: 2038 D: 7087

LTC 8MB
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 17732 W: 2870 L: 2745 D: 12117

STC 16MB
LLR: 2.96 (-2.94,2.94) [-4.00,0.00]
Total: 17401 W: 3324 L: 3227 D: 10850

Bench: 8248164

Resolves #377
This commit is contained in:
mstembera 2015-07-15 20:15:14 +01:00 • committed by Joona Kiiski
parent 3054db989d
commit d8aeaab79c
1 changed files with 1 additions and 1 deletions
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2
src/tt.cpp
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@ -87,7 +87,7 @@ TTEntry* TranspositionTable::probe(const Key key, bool& found) const {
// Find an entry to be replaced according to the replacement strategy
TTEntry* replace = tte;
for (int i = 1; i < ClusterSize; ++i)
if ( (( tte[i].genBound8 & 0xFC) == generation8 || tte[i].bound() == BOUND_EXACT)
if ( (( tte[i].genBound8 & 0xFC) == generation8)
- ((replace->genBound8 & 0xFC) == generation8)
- (tte[i].depth8 < replace->depth8) < 0)
replace = &tte[i];