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Introduce PieceSquareTable[16][64]

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Instead of MgPieceSquareTable[16][64] and EgPieceSquareTable[16][64]

This allows to fetch mg and eg values from adjacent words in memory.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2009-11-07 13:12:58 +01:00
parent 1ae8c59c0b
commit dda7e4639a
4 changed files with 31 additions and 44 deletions
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21
src/position.h
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@@ -243,7 +243,7 @@ public:
Score value() const;
Value non_pawn_material(Color c) const;
Phase game_phase() const;
template<GamePhase> Value pst_delta(Piece piece, Square from, Square to) const;
Score pst_delta(Piece piece, Square from, Square to) const;
// Game termination checks
bool is_mate() const;
@@ -295,8 +295,8 @@ private:
Key compute_material_key() const;
// Computing incremental evaluation scores and material counts
template<GamePhase> Value pst(Color c, PieceType pt, Square s) const;
template<GamePhase> Value compute_value() const;
Score pst(Color c, PieceType pt, Square s) const;
Score compute_value() const;
Value compute_non_pawn_material(Color c) const;
// Board
@@ -327,8 +327,7 @@ private:
static Key zobCastle[16];
static Key zobMaterial[2][8][16];
static Key zobSideToMove;
static Value MgPieceSquareTable[16][64];
static Value EgPieceSquareTable[16][64];
static Score PieceSquareTable[16][64];
};
@@ -501,16 +500,12 @@ inline Key Position::get_material_key() const {
return st->materialKey;
}
template<Position::GamePhase Ph>
inline Value Position::pst(Color c, PieceType pt, Square s) const {
return (Ph == MidGame ? MgPieceSquareTable[piece_of_color_and_type(c, pt)][s]
: EgPieceSquareTable[piece_of_color_and_type(c, pt)][s]);
inline Score Position::pst(Color c, PieceType pt, Square s) const {
return PieceSquareTable[piece_of_color_and_type(c, pt)][s];
}
template<Position::GamePhase Ph>
inline Value Position::pst_delta(Piece piece, Square from, Square to) const {
return (Ph == MidGame ? MgPieceSquareTable[piece][to] - MgPieceSquareTable[piece][from]
: EgPieceSquareTable[piece][to] - EgPieceSquareTable[piece][from]);
inline Score Position::pst_delta(Piece piece, Square from, Square to) const {
return PieceSquareTable[piece][to] - PieceSquareTable[piece][from];
}
inline Score Position::value() const {