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Remove AdjacentFiles

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This is a non-functional simplification that removes the AdjacentFiles array.
This array is simple enough to calculate that the pre-calculated array provides
no benefit. Reduces the memory footprint.

STC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 74839 W: 16390 L: 16373 D: 42076
http://tests.stockfishchess.org/tests/view/5c3d75920ebc596a450cfb67

No functionnal change
This commit is contained in:
protonspring
2019-01-14 22:53:43 -07:00
committed by Stéphane Nicolet
parent 3732c55c18
commit 3300517ecb
2 changed files with 2 additions and 7 deletions
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3
src/bitboard.h
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@@ -65,7 +65,6 @@ extern int SquareDistance[SQUARE_NB][SQUARE_NB];
extern Bitboard SquareBB[SQUARE_NB];
extern Bitboard FileBB[FILE_NB];
extern Bitboard RankBB[RANK_NB];
extern Bitboard AdjacentFilesBB[FILE_NB];
extern Bitboard ForwardRanksBB[COLOR_NB][RANK_NB];
extern Bitboard BetweenBB[SQUARE_NB][SQUARE_NB];
extern Bitboard LineBB[SQUARE_NB][SQUARE_NB];
@@ -195,7 +194,7 @@ constexpr Bitboard double_pawn_attacks_bb(Bitboard b) {
/// adjacent files of the given one.
inline Bitboard adjacent_files_bb(File f) {
return AdjacentFilesBB[f];
return shift<EAST>(FileBB[f]) | shift<WEST>(FileBB[f]);
}