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Consolidate Square Flipping

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Add a flip_rank() and flip_file() so that all of the square flipping can be consolidated.

STC
LLR: 2.94 (-2.94,2.94) {-1.50,0.50}
Total: 57234 W: 11064 L: 10969 D: 35201
Ptnml(0-2): 822, 6562, 13801, 6563, 869
http://tests.stockfishchess.org/tests/view/5e5d2f2aafe6254521f2ffaa

closes https://github.com/official-stockfish/Stockfish/pull/2568

No functional change.
This commit is contained in:
protonspring
2020-03-01 02:03:36 -07:00
committed by Joost VandeVondele
parent c6839a2615
commit 960d59d541
4 changed files with 12 additions and 9 deletions
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4
src/endgame.cpp
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@@ -74,9 +74,9 @@ namespace {
assert(pos.count<PAWN>(strongSide) == 1);
if (file_of(pos.square<PAWN>(strongSide)) >= FILE_E)
sq = Square(int(sq) ^ 7); // Mirror SQ_H1 -> SQ_A1
sq = flip_file(sq);
return strongSide == WHITE ? sq : ~sq;
return strongSide == WHITE ? sq : flip_rank(sq);
}
} // namespace