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Shrink castlePath[] and castleRookSquare[] sizes

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Shrinking from [16] to [2][2] is able to speedup
perft of start position of almost 5% !

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2012-04-08 11:32:01 +01:00
parent 0049d3f337
commit e56342ed00
4 changed files with 42 additions and 41 deletions
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18
src/position.h
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@@ -113,8 +113,8 @@ public:
// Castling
bool can_castle(CastleRight f) const;
bool can_castle(Color c) const;
bool castle_impeded(CastleRight f) const;
Square castle_rook_square(CastleRight f) const;
bool castle_impeded(Color c, CastlingSide s) const;
Square castle_rook_square(Color c, CastlingSide s) const;
// Checking
bool in_check() const;
@@ -213,9 +213,9 @@ private:
int index[64]; // [square]
// Other info
int castleRightsMask[64]; // [square]
Square castleRookSquare[16]; // [castleRight]
Bitboard castlePath[16]; // [castleRight]
int castleRightsMask[64]; // [square]
Square castleRookSquare[2][2]; // [color][side]
Bitboard castlePath[2][2]; // [color][side]
StateInfo startState;
int64_t nodes;
int startPosPly;
@@ -305,12 +305,12 @@ inline bool Position::can_castle(Color c) const {
return st->castleRights & ((WHITE_OO | WHITE_OOO) << c);
}
inline bool Position::castle_impeded(CastleRight f) const {
return byTypeBB[ALL_PIECES] & castlePath[f];
inline bool Position::castle_impeded(Color c, CastlingSide s) const {
return byTypeBB[ALL_PIECES] & castlePath[c][s];
}
inline Square Position::castle_rook_square(CastleRight f) const {
return castleRookSquare[f];
inline Square Position::castle_rook_square(Color c, CastlingSide s) const {
return castleRookSquare[c][s];
}
template<PieceType Pt>