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Small tidyup of TranspositionTable::store()
Hopefully without bugs this time! Signed-off-by: Marco Costalba <mcostalba@gmail.com>
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parent
34b1d0538b
commit
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1 changed files with 10 additions and 10 deletions
20
src/tt.cpp
20
src/tt.cpp
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@ -108,31 +108,31 @@ void TranspositionTable::store(const Position &pos, Value v, Depth d,
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TTEntry *tte, *replace;
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tte = replace = first_entry(pos);
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for (int i = 0; i < 4; i++)
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for (int i = 0; i < 4; i++, tte++)
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{
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if (!(tte+i)->key()) // still empty
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if (!tte->key()) // still empty
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{
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*(tte+i) = TTEntry(pos.get_key(), v, type, d, m, generation);
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*tte = TTEntry(pos.get_key(), v, type, d, m, generation);
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writes++;
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return;
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}
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if ((tte+i)->key() == pos.get_key()) // overwrite old
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else if (tte->key() == pos.get_key()) // overwrite old
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{
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if (m == MOVE_NONE)
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m = (tte+i)->move();
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m = tte->move();
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*(tte+i) = TTEntry(pos.get_key(), v, type, d, m, generation);
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*tte = TTEntry(pos.get_key(), v, type, d, m, generation);
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return;
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}
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if (i == 0) // replace would be a no-op in this common case
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else if (i == 0) // replace would be a no-op in this common case
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continue;
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int c1 = (replace->generation() == generation ? 2 : 0);
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int c2 = ((tte+i)->generation() == generation ? -2 : 0);
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int c3 = ((tte+i)->depth() < replace->depth() ? 1 : 0);
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int c2 = (tte->generation() == generation ? -2 : 0);
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int c3 = (tte->depth() < replace->depth() ? 1 : 0);
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if (c1 + c2 + c3 > 0)
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replace = tte+i;
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replace = tte;
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}
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*replace = TTEntry(pos.get_key(), v, type, d, m, generation);
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writes++;
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