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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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8
src/types.h
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@@ -358,8 +358,12 @@ constexpr Color operator~(Color c) {
return Color(c ^ BLACK); // Toggle color
}
constexpr Square operator~(Square s) {
return Square(s ^ SQ_A8); // Vertical flip SQ_A1 -> SQ_A8
constexpr Square flip_rank(Square s) {
return Square(s ^ SQ_A8);
}
constexpr Square flip_file(Square s) {
return Square(s ^ SQ_H1);
}
constexpr Piece operator~(Piece pc) {