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Move pawnsOnSquares to Position (#2100)

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We can remove the values in Pawns if we just use the piece arrays in Position. This reduces the size of a pawn entry. This simplification passed individually, and in concert with ps_passedcount100 (removes passedCount storage in pawns.).

STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 19957 W: 4529 L: 4404 D: 11024
http://tests.stockfishchess.org/tests/view/5cb3c2d00ebc5925cf016f0d

Combo STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 17368 W: 3925 L: 3795 D: 9648
http://tests.stockfishchess.org/tests/view/5cb3d3510ebc5925cf01709a

This is a non-functional simplification.
This commit is contained in:
protonspring
2019-04-16 15:10:53 -06:00
committed by Marco Costalba
parent 76777b663a
commit 3b46df546d
4 changed files with 6 additions and 7 deletions
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5
src/position.h
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@@ -129,6 +129,7 @@ public:
// Piece specific
bool pawn_passed(Color c, Square s) const;
bool opposite_bishops() const;
int pawns_on_same_color_squares(Color c, Square s) const;
// Doing and undoing moves
void do_move(Move m, StateInfo& newSt);
@@ -323,6 +324,10 @@ inline bool Position::advanced_pawn_push(Move m) const {
&& relative_rank(sideToMove, from_sq(m)) > RANK_4;
}
inline int Position::pawns_on_same_color_squares(Color c, Square s) const {
return popcount(pieces(c, PAWN) & ((DarkSquares & s) ? DarkSquares : ~DarkSquares));
}
inline Key Position::key() const {
return st->key;
}