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Use shift to divide reduction
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No functional change
bench: 1281912
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@mstembera
mstembera committed Nov 11, 2024
1 parent 24c5779 commit 7b1d6e8
Showing 1 changed file with 1 addition and 1 deletion.
2 changes: 1 addition & 1 deletion src/search.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1697,7 +1697,7 @@ Value Search::Worker::qsearch(Position& pos, Stack* ss, Value alpha, Value beta)

Depth Search::Worker::reduction(bool i, Depth d, int mn, int delta) const {
int reductionScale = reductions[d] * reductions[mn];
return (reductionScale + 1239 - delta * 795 / rootDelta) / 1024 + (!i && reductionScale > 1341);
return unsigned(reductionScale + 1239 - delta * 795 / rootDelta) / 1024 + (!i && reductionScale > 1341);
}

// elapsed() returns the time elapsed since the search started. If the
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2 comments on commit 7b1d6e8

@xu-shawn
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Could you try applying it instead to line 999 on top of official-stockfish#5667? This patch conflicts with the PR.

@mstembera
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Ah ok. I'll probably wait for 5667 to get merged.

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