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Cleanup TT::hashfull()

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closes https://github.com/official-stockfish/Stockfish/pull/5651

No functional change
This commit is contained in:
mstembera 2024-10-23 03:37:32 -07:00 • committed by Disservin
parent 24c57793e1
commit 16fee2a7da
1 changed files with 4 additions and 11 deletions
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15
src/tt.cpp
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@ -194,19 +194,12 @@ void TranspositionTable::clear(ThreadPool& threads) {
// occupation during a search. The hash is x permill full, as per UCI protocol.
// Only counts entries which match the current generation.
int TranspositionTable::hashfull(int maxAge) const {
int cnt = 0;
int maxAgeInternal = maxAge << GENERATION_BITS;
int cnt = 0;
for (int i = 0; i < 1000; ++i)
for (int j = 0; j < ClusterSize; ++j)
{
if (table[i].entry[j].is_occupied())
{
int age = (generation8 >> GENERATION_BITS)
- ((table[i].entry[j].genBound8 & GENERATION_MASK) >> GENERATION_BITS);
if (age < 0)
age += 1 << (8 - GENERATION_BITS);
cnt += age <= maxAge;
}
}
cnt += table[i].entry[j].is_occupied()
&& table[i].entry[j].relative_age(generation8) <= maxAgeInternal;
return cnt / ClusterSize;
}