/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)
+ Copyright (C) 2004-2023 The Stockfish developers (see AUTHORS file)
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
PS_B_ROOK = 7 * SQUARE_NB,
PS_W_QUEEN = 8 * SQUARE_NB,
PS_B_QUEEN = 9 * SQUARE_NB,
- PS_KING = 10 * SQUARE_NB,
- PS_NB = 11 * SQUARE_NB
+ PS_KING = 10 * SQUARE_NB,
+ PS_NB = 11 * SQUARE_NB
};
static constexpr IndexType PieceSquareIndex[COLOR_NB][PIECE_NB] = {
PS_NONE, PS_W_PAWN, PS_W_KNIGHT, PS_W_BISHOP, PS_W_ROOK, PS_W_QUEEN, PS_KING, PS_NONE }
};
- // Orient a square according to perspective (rotates by 180 for black)
- static Square orient(Color perspective, Square s, Square ksq);
-
// Index of a feature for a given king position and another piece on some square
- static IndexType make_index(Color perspective, Square s, Piece pc, Square ksq);
+ template<Color Perspective>
+ static IndexType make_index(Square s, Piece pc, Square ksq);
public:
// Feature name
static constexpr IndexType Dimensions =
static_cast<IndexType>(SQUARE_NB) * static_cast<IndexType>(PS_NB) / 2;
- static constexpr int KingBuckets[64] = {
- -1, -1, -1, -1, 31, 30, 29, 28,
- -1, -1, -1, -1, 27, 26, 25, 24,
- -1, -1, -1, -1, 23, 22, 21, 20,
- -1, -1, -1, -1, 19, 18, 17, 16,
- -1, -1, -1, -1, 15, 14, 13, 12,
- -1, -1, -1, -1, 11, 10, 9, 8,
- -1, -1, -1, -1, 7, 6, 5, 4,
- -1, -1, -1, -1, 3, 2, 1, 0
+#define B(v) (v * PS_NB)
+ static constexpr int KingBuckets[COLOR_NB][SQUARE_NB] = {
+ { B(28), B(29), B(30), B(31), B(31), B(30), B(29), B(28),
+ B(24), B(25), B(26), B(27), B(27), B(26), B(25), B(24),
+ B(20), B(21), B(22), B(23), B(23), B(22), B(21), B(20),
+ B(16), B(17), B(18), B(19), B(19), B(18), B(17), B(16),
+ B(12), B(13), B(14), B(15), B(15), B(14), B(13), B(12),
+ B( 8), B( 9), B(10), B(11), B(11), B(10), B( 9), B( 8),
+ B( 4), B( 5), B( 6), B( 7), B( 7), B( 6), B( 5), B( 4),
+ B( 0), B( 1), B( 2), B( 3), B( 3), B( 2), B( 1), B( 0) },
+ { B( 0), B( 1), B( 2), B( 3), B( 3), B( 2), B( 1), B( 0),
+ B( 4), B( 5), B( 6), B( 7), B( 7), B( 6), B( 5), B( 4),
+ B( 8), B( 9), B(10), B(11), B(11), B(10), B( 9), B( 8),
+ B(12), B(13), B(14), B(15), B(15), B(14), B(13), B(12),
+ B(16), B(17), B(18), B(19), B(19), B(18), B(17), B(16),
+ B(20), B(21), B(22), B(23), B(23), B(22), B(21), B(20),
+ B(24), B(25), B(26), B(27), B(27), B(26), B(25), B(24),
+ B(28), B(29), B(30), B(31), B(31), B(30), B(29), B(28) }
+ };
+#undef B
+
+ // Orient a square according to perspective (rotates by 180 for black)
+ static constexpr int OrientTBL[COLOR_NB][SQUARE_NB] = {
+ { SQ_H1, SQ_H1, SQ_H1, SQ_H1, SQ_A1, SQ_A1, SQ_A1, SQ_A1,
+ SQ_H1, SQ_H1, SQ_H1, SQ_H1, SQ_A1, SQ_A1, SQ_A1, SQ_A1,
+ SQ_H1, SQ_H1, SQ_H1, SQ_H1, SQ_A1, SQ_A1, SQ_A1, SQ_A1,
+ SQ_H1, SQ_H1, SQ_H1, SQ_H1, SQ_A1, SQ_A1, SQ_A1, SQ_A1,
+ SQ_H1, SQ_H1, SQ_H1, SQ_H1, SQ_A1, SQ_A1, SQ_A1, SQ_A1,
+ SQ_H1, SQ_H1, SQ_H1, SQ_H1, SQ_A1, SQ_A1, SQ_A1, SQ_A1,
+ SQ_H1, SQ_H1, SQ_H1, SQ_H1, SQ_A1, SQ_A1, SQ_A1, SQ_A1,
+ SQ_H1, SQ_H1, SQ_H1, SQ_H1, SQ_A1, SQ_A1, SQ_A1, SQ_A1 },
+ { SQ_H8, SQ_H8, SQ_H8, SQ_H8, SQ_A8, SQ_A8, SQ_A8, SQ_A8,
+ SQ_H8, SQ_H8, SQ_H8, SQ_H8, SQ_A8, SQ_A8, SQ_A8, SQ_A8,
+ SQ_H8, SQ_H8, SQ_H8, SQ_H8, SQ_A8, SQ_A8, SQ_A8, SQ_A8,
+ SQ_H8, SQ_H8, SQ_H8, SQ_H8, SQ_A8, SQ_A8, SQ_A8, SQ_A8,
+ SQ_H8, SQ_H8, SQ_H8, SQ_H8, SQ_A8, SQ_A8, SQ_A8, SQ_A8,
+ SQ_H8, SQ_H8, SQ_H8, SQ_H8, SQ_A8, SQ_A8, SQ_A8, SQ_A8,
+ SQ_H8, SQ_H8, SQ_H8, SQ_H8, SQ_A8, SQ_A8, SQ_A8, SQ_A8,
+ SQ_H8, SQ_H8, SQ_H8, SQ_H8, SQ_A8, SQ_A8, SQ_A8, SQ_A8 }
};
// Maximum number of simultaneously active features.
using IndexList = ValueList<IndexType, MaxActiveDimensions>;
// Get a list of indices for active features
+ template<Color Perspective>
static void append_active_indices(
const Position& pos,
- Color perspective,
IndexList& active);
// Get a list of indices for recently changed features
+ template<Color Perspective>
static void append_changed_indices(
Square ksq,
const DirtyPiece& dp,
- Color perspective,
IndexList& removed,
IndexList& added
);