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Refactor Position::pseudo_legal Pawn Move Check

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use intermediate variables to make the statement easier to read

closes https://github.com/official-stockfish/Stockfish/pull/6045

No functional change
This commit is contained in:
FauziAkram
2025-05-02 18:32:55 +03:00
committed by Joost VandeVondele
parent c4e2479a75
commit 07f6edf934
1 changed files with 8 additions and 4 deletions
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12
src/position.cpp
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@@ -597,10 +597,14 @@ bool Position::pseudo_legal(const Move m) const {
if ((Rank8BB | Rank1BB) & to)
return false;
if (!(attacks_bb<PAWN>(from, us) & pieces(~us) & to) // Not a capture
&& !((from + pawn_push(us) == to) && empty(to)) // Not a single push
&& !((from + 2 * pawn_push(us) == to) // Not a double push
&& (relative_rank(us, from) == RANK_2) && empty(to) && empty(to - pawn_push(us))))
// Check if it's a valid capture, single push, or double push
const bool isCapture = bool(attacks_bb<PAWN>(from, us) & pieces(~us) & to);
const bool isSinglePush = (from + pawn_push(us) == to) && empty(to);
const bool isDoublePush = (from + 2 * pawn_push(us) == to)
&& (relative_rank(us, from) == RANK_2) && empty(to)
&& empty(to - pawn_push(us));
if (!(isCapture || isSinglePush || isDoublePush))
return false;
}
else if (!(attacks_bb(type_of(pc), from, pieces()) & to))