/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2012 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#if !defined(TYPES_H_INCLUDED)
+#ifndef TYPES_H_INCLUDED
#define TYPES_H_INCLUDED
-/// For Linux and OSX configuration is done automatically using Makefile. To get
-/// started type 'make help'.
+/// When compiling with provided Makefile (e.g. for Linux and OSX), configuration
+/// is done automatically. To get started type 'make help'.
///
-/// For Windows, part of the configuration is detected automatically, but some
-/// switches need to be set manually:
+/// When Makefile is not used (e.g. with Microsoft Visual Studio) some switches
+/// need to be set manually:
///
-/// -DNDEBUG | Disable debugging mode. Use always.
+/// -DNDEBUG | Disable debugging mode. Always use this for release.
///
-/// -DNO_PREFETCH | Disable use of prefetch asm-instruction. A must if you want
-/// | the executable to run on some very old machines.
+/// -DNO_PREFETCH | Disable use of prefetch asm-instruction. You may need this to
+/// | run on some very old machines.
///
/// -DUSE_POPCNT | Add runtime support for use of popcnt asm-instruction. Works
-/// | only in 64-bit mode. For compiling requires hardware with
-/// | popcnt support.
+/// | only in 64-bit mode and requires hardware with popcnt support.
+///
+/// -DUSE_PEXT | Add runtime support for use of pext asm-instruction. Works
+/// | only in 64-bit mode and requires hardware with pext support.
+#include <cassert>
+#include <cctype>
#include <climits>
+#include <cstdint>
#include <cstdlib>
#if defined(_MSC_VER)
-
// Disable some silly and noisy warning from MSVC compiler
#pragma warning(disable: 4127) // Conditional expression is constant
#pragma warning(disable: 4146) // Unary minus operator applied to unsigned type
#pragma warning(disable: 4800) // Forcing value to bool 'true' or 'false'
-
-// MSVC does not support <inttypes.h>
-typedef signed __int8 int8_t;
-typedef unsigned __int8 uint8_t;
-typedef signed __int16 int16_t;
-typedef unsigned __int16 uint16_t;
-typedef signed __int32 int32_t;
-typedef unsigned __int32 uint32_t;
-typedef signed __int64 int64_t;
-typedef unsigned __int64 uint64_t;
-
-#else
-# include <inttypes.h>
#endif
-#if defined(_WIN64)
-# include <intrin.h> // MSVC popcnt and bsfq instrinsics
+/// Predefined macros hell:
+///
+/// __GNUC__ Compiler is gcc, Clang or Intel on Linux
+/// __INTEL_COMPILER Compiler is Intel
+/// _MSC_VER Compiler is MSVC or Intel on Windows
+/// _WIN32 Building on Windows (any)
+/// _WIN64 Building on Windows 64 bit
+
+#if defined(_WIN64) && defined(_MSC_VER) // No Makefile used
+# include <intrin.h> // Microsoft header for _BitScanForward64()
# define IS_64BIT
-# define USE_BSFQ
#endif
-#if defined(USE_POPCNT) && defined(_MSC_VER) && defined(__INTEL_COMPILER)
-# include <nmmintrin.h> // Intel header for _mm_popcnt_u64() intrinsic
+#if defined(USE_POPCNT) && (defined(__INTEL_COMPILER) || defined(_MSC_VER))
+# include <nmmintrin.h> // Intel and Microsoft header for _mm_popcnt_u64()
+#endif
+
+#if !defined(NO_PREFETCH) && (defined(__INTEL_COMPILER) || defined(_MSC_VER))
+# include <xmmintrin.h> // Intel and Microsoft header for _mm_prefetch()
#endif
-#if defined(_MSC_VER) || defined(__INTEL_COMPILER)
-# define CACHE_LINE_ALIGNMENT __declspec(align(64))
+#if defined(USE_PEXT)
+# include <immintrin.h> // Header for _pext_u64() intrinsic
+# define pext(b, m) _pext_u64(b, m)
#else
-# define CACHE_LINE_ALIGNMENT __attribute__ ((aligned(64)))
+# define pext(b, m) 0
#endif
-#if defined(_MSC_VER)
-# define FORCE_INLINE __forceinline
-#elif defined(__GNUC__)
-# define FORCE_INLINE inline __attribute__((always_inline))
+#ifdef USE_POPCNT
+constexpr bool HasPopCnt = true;
#else
-# define FORCE_INLINE inline
+constexpr bool HasPopCnt = false;
#endif
-#if defined(USE_POPCNT)
-const bool HasPopCnt = true;
+#ifdef USE_PEXT
+constexpr bool HasPext = true;
#else
-const bool HasPopCnt = false;
+constexpr bool HasPext = false;
#endif
-#if defined(IS_64BIT)
-const bool Is64Bit = true;
+#ifdef IS_64BIT
+constexpr bool Is64Bit = true;
#else
-const bool Is64Bit = false;
+constexpr bool Is64Bit = false;
#endif
typedef uint64_t Key;
typedef uint64_t Bitboard;
-const int MAX_MOVES = 256;
-const int MAX_PLY = 100;
-const int MAX_PLY_PLUS_2 = MAX_PLY + 2;
-
-const Bitboard FileABB = 0x0101010101010101ULL;
-const Bitboard FileBBB = FileABB << 1;
-const Bitboard FileCBB = FileABB << 2;
-const Bitboard FileDBB = FileABB << 3;
-const Bitboard FileEBB = FileABB << 4;
-const Bitboard FileFBB = FileABB << 5;
-const Bitboard FileGBB = FileABB << 6;
-const Bitboard FileHBB = FileABB << 7;
-
-const Bitboard Rank1BB = 0xFF;
-const Bitboard Rank2BB = Rank1BB << (8 * 1);
-const Bitboard Rank3BB = Rank1BB << (8 * 2);
-const Bitboard Rank4BB = Rank1BB << (8 * 3);
-const Bitboard Rank5BB = Rank1BB << (8 * 4);
-const Bitboard Rank6BB = Rank1BB << (8 * 5);
-const Bitboard Rank7BB = Rank1BB << (8 * 6);
-const Bitboard Rank8BB = Rank1BB << (8 * 7);
-
+constexpr int MAX_MOVES = 256;
+constexpr int MAX_PLY = 246;
/// A move needs 16 bits to be stored
///
/// bit 0- 5: destination square (from 0 to 63)
/// bit 6-11: origin square (from 0 to 63)
/// bit 12-13: promotion piece type - 2 (from KNIGHT-2 to QUEEN-2)
-/// bit 14-15: special move flag: promotion (1), en passant (2), castle (3)
+/// bit 14-15: special move flag: promotion (1), en passant (2), castling (3)
+/// NOTE: EN-PASSANT bit is set only when a pawn can be captured
///
/// Special cases are MOVE_NONE and MOVE_NULL. We can sneak these in because in
/// any normal move destination square is always different from origin square
/// while MOVE_NONE and MOVE_NULL have the same origin and destination square.
-enum Move {
- MOVE_NONE = 0,
+enum Move : int {
+ MOVE_NONE,
MOVE_NULL = 65
};
-struct MoveStack {
- Move move;
- int score;
+enum MoveType {
+ NORMAL,
+ PROMOTION = 1 << 14,
+ ENPASSANT = 2 << 14,
+ CASTLING = 3 << 14
};
-inline bool operator<(const MoveStack& f, const MoveStack& s) {
- return f.score < s.score;
-}
+enum Color {
+ WHITE, BLACK, COLOR_NB = 2
+};
+
+enum CastlingSide {
+ KING_SIDE, QUEEN_SIDE, CASTLING_SIDE_NB = 2
+};
+
+enum CastlingRight {
+ NO_CASTLING,
+ WHITE_OO,
+ WHITE_OOO = WHITE_OO << 1,
+ BLACK_OO = WHITE_OO << 2,
+ BLACK_OOO = WHITE_OO << 3,
+
+ WHITE_CASTLING = WHITE_OO | WHITE_OOO,
+ BLACK_CASTLING = BLACK_OO | BLACK_OOO,
+ ANY_CASTLING = WHITE_CASTLING | BLACK_CASTLING,
+
+ CASTLING_RIGHT_NB = 16
+};
-enum CastleRight {
- CASTLES_NONE = 0,
- WHITE_OO = 1,
- BLACK_OO = 2,
- WHITE_OOO = 4,
- BLACK_OOO = 8,
- ALL_CASTLES = 15
+enum Phase {
+ PHASE_ENDGAME,
+ PHASE_MIDGAME = 128,
+ MG = 0, EG = 1, PHASE_NB = 2
};
enum ScaleFactor {
- SCALE_FACTOR_DRAW = 0,
- SCALE_FACTOR_NORMAL = 64,
- SCALE_FACTOR_MAX = 128,
- SCALE_FACTOR_NONE = 255
+ SCALE_FACTOR_DRAW = 0,
+ SCALE_FACTOR_NORMAL = 64,
+ SCALE_FACTOR_MAX = 128,
+ SCALE_FACTOR_NONE = 255
};
enum Bound {
- BOUND_NONE = 0,
- BOUND_UPPER = 1,
- BOUND_LOWER = 2,
+ BOUND_NONE,
+ BOUND_UPPER,
+ BOUND_LOWER,
BOUND_EXACT = BOUND_UPPER | BOUND_LOWER
};
-enum Value {
+enum Value : int {
VALUE_ZERO = 0,
VALUE_DRAW = 0,
- VALUE_KNOWN_WIN = 15000,
- VALUE_MATE = 30000,
- VALUE_INFINITE = 30001,
- VALUE_NONE = 30002,
+ VALUE_KNOWN_WIN = 10000,
+ VALUE_MATE = 32000,
+ VALUE_INFINITE = 32001,
+ VALUE_NONE = 32002,
+
+ VALUE_MATE_IN_MAX_PLY = VALUE_MATE - 2 * MAX_PLY,
+ VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + 2 * MAX_PLY,
- VALUE_MATE_IN_MAX_PLY = VALUE_MATE - MAX_PLY,
- VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + MAX_PLY,
+ PawnValueMg = 128, PawnValueEg = 213,
+ KnightValueMg = 782, KnightValueEg = 865,
+ BishopValueMg = 830, BishopValueEg = 918,
+ RookValueMg = 1289, RookValueEg = 1378,
+ QueenValueMg = 2529, QueenValueEg = 2687,
- VALUE_ENSURE_INTEGER_SIZE_P = INT_MAX,
- VALUE_ENSURE_INTEGER_SIZE_N = INT_MIN
+ MidgameLimit = 15258, EndgameLimit = 3915
};
enum PieceType {
- NO_PIECE_TYPE = 0,
- PAWN = 1, KNIGHT = 2, BISHOP = 3, ROOK = 4, QUEEN = 5, KING = 6
+ NO_PIECE_TYPE, PAWN, KNIGHT, BISHOP, ROOK, QUEEN, KING,
+ ALL_PIECES = 0,
+ PIECE_TYPE_NB = 8
};
enum Piece {
- NO_PIECE = 16, // color_of(NO_PIECE) == NO_COLOR
- W_PAWN = 1, W_KNIGHT = 2, W_BISHOP = 3, W_ROOK = 4, W_QUEEN = 5, W_KING = 6,
- B_PAWN = 9, B_KNIGHT = 10, B_BISHOP = 11, B_ROOK = 12, B_QUEEN = 13, B_KING = 14
+ NO_PIECE,
+ W_PAWN = 1, W_KNIGHT, W_BISHOP, W_ROOK, W_QUEEN, W_KING,
+ B_PAWN = 9, B_KNIGHT, B_BISHOP, B_ROOK, B_QUEEN, B_KING,
+ PIECE_NB = 16
};
-enum Color {
- WHITE, BLACK, NO_COLOR
-};
+extern Value PieceValue[PHASE_NB][PIECE_NB];
-enum Depth {
+enum Depth : int {
- ONE_PLY = 2,
+ ONE_PLY = 1,
DEPTH_ZERO = 0 * ONE_PLY,
- DEPTH_QS_CHECKS = -1 * ONE_PLY,
- DEPTH_QS_NO_CHECKS = -2 * ONE_PLY,
+ DEPTH_QS_CHECKS = 0 * ONE_PLY,
+ DEPTH_QS_NO_CHECKS = -1 * ONE_PLY,
DEPTH_QS_RECAPTURES = -5 * ONE_PLY,
- DEPTH_NONE = -127 * ONE_PLY
+ DEPTH_NONE = -6 * ONE_PLY,
+ DEPTH_OFFSET = DEPTH_NONE,
+ DEPTH_MAX = MAX_PLY * ONE_PLY
};
-enum Square {
+static_assert(!(ONE_PLY & (ONE_PLY - 1)), "ONE_PLY is not a power of 2");
+
+enum Square : int {
SQ_A1, SQ_B1, SQ_C1, SQ_D1, SQ_E1, SQ_F1, SQ_G1, SQ_H1,
SQ_A2, SQ_B2, SQ_C2, SQ_D2, SQ_E2, SQ_F2, SQ_G2, SQ_H2,
SQ_A3, SQ_B3, SQ_C3, SQ_D3, SQ_E3, SQ_F3, SQ_G3, SQ_H3,
SQ_A8, SQ_B8, SQ_C8, SQ_D8, SQ_E8, SQ_F8, SQ_G8, SQ_H8,
SQ_NONE,
- DELTA_N = 8,
- DELTA_E = 1,
- DELTA_S = -8,
- DELTA_W = -1,
-
- DELTA_NN = DELTA_N + DELTA_N,
- DELTA_NE = DELTA_N + DELTA_E,
- DELTA_SE = DELTA_S + DELTA_E,
- DELTA_SS = DELTA_S + DELTA_S,
- DELTA_SW = DELTA_S + DELTA_W,
- DELTA_NW = DELTA_N + DELTA_W
+ SQUARE_NB = 64
};
-enum File {
- FILE_A, FILE_B, FILE_C, FILE_D, FILE_E, FILE_F, FILE_G, FILE_H
-};
+enum Direction : int {
+ NORTH = 8,
+ EAST = 1,
+ SOUTH = -NORTH,
+ WEST = -EAST,
-enum Rank {
- RANK_1, RANK_2, RANK_3, RANK_4, RANK_5, RANK_6, RANK_7, RANK_8
+ NORTH_EAST = NORTH + EAST,
+ SOUTH_EAST = SOUTH + EAST,
+ SOUTH_WEST = SOUTH + WEST,
+ NORTH_WEST = NORTH + WEST
};
-
-/// Score enum keeps a midgame and an endgame value in a single integer (enum),
-/// first LSB 16 bits are used to store endgame value, while upper bits are used
-/// for midgame value. Compiler is free to choose the enum type as long as can
-/// keep its data, so ensure Score to be an integer type.
-enum Score {
- SCORE_ZERO = 0,
- SCORE_ENSURE_INTEGER_SIZE_P = INT_MAX,
- SCORE_ENSURE_INTEGER_SIZE_N = INT_MIN
+enum File : int {
+ FILE_A, FILE_B, FILE_C, FILE_D, FILE_E, FILE_F, FILE_G, FILE_H, FILE_NB
};
-inline Score make_score(int mg, int eg) { return Score((mg << 16) + eg); }
-
-/// Extracting the signed lower and upper 16 bits it not so trivial because
-/// according to the standard a simple cast to short is implementation defined
-/// and so is a right shift of a signed integer.
-inline Value mg_value(Score s) { return Value(((s + 32768) & ~0xffff) / 0x10000); }
-
-/// On Intel 64 bit we have a small speed regression with the standard conforming
-/// version, so use a faster code in this case that, although not 100% standard
-/// compliant it seems to work for Intel and MSVC.
-#if defined(IS_64BIT) && (!defined(__GNUC__) || defined(__INTEL_COMPILER))
+enum Rank : int {
+ RANK_1, RANK_2, RANK_3, RANK_4, RANK_5, RANK_6, RANK_7, RANK_8, RANK_NB
+};
-inline Value eg_value(Score s) { return Value(int16_t(s & 0xffff)); }
-#else
+/// Score enum stores a middlegame and an endgame value in a single integer (enum).
+/// The least significant 16 bits are used to store the middlegame value and the
+/// upper 16 bits are used to store the endgame value. We have to take care to
+/// avoid left-shifting a signed int to avoid undefined behavior.
+enum Score : int { SCORE_ZERO };
-inline Value eg_value(Score s) {
- return Value((int)(unsigned(s) & 0x7fffu) - (int)(unsigned(s) & 0x8000u));
+constexpr Score make_score(int mg, int eg) {
+ return Score((int)((unsigned int)eg << 16) + mg);
}
-#endif
-
-#define ENABLE_SAFE_OPERATORS_ON(T) \
-inline T operator+(const T d1, const T d2) { return T(int(d1) + int(d2)); } \
-inline T operator-(const T d1, const T d2) { return T(int(d1) - int(d2)); } \
-inline T operator*(int i, const T d) { return T(i * int(d)); } \
-inline T operator*(const T d, int i) { return T(int(d) * i); } \
-inline T operator-(const T d) { return T(-int(d)); } \
-inline T& operator+=(T& d1, const T d2) { d1 = d1 + d2; return d1; } \
-inline T& operator-=(T& d1, const T d2) { d1 = d1 - d2; return d1; } \
-inline T& operator*=(T& d, int i) { d = T(int(d) * i); return d; }
-
-#define ENABLE_OPERATORS_ON(T) ENABLE_SAFE_OPERATORS_ON(T) \
-inline T operator++(T& d, int) { d = T(int(d) + 1); return d; } \
-inline T operator--(T& d, int) { d = T(int(d) - 1); return d; } \
-inline T operator/(const T d, int i) { return T(int(d) / i); } \
-inline T& operator/=(T& d, int i) { d = T(int(d) / i); return d; }
-
-ENABLE_OPERATORS_ON(Value)
-ENABLE_OPERATORS_ON(PieceType)
-ENABLE_OPERATORS_ON(Piece)
-ENABLE_OPERATORS_ON(Color)
-ENABLE_OPERATORS_ON(Depth)
-ENABLE_OPERATORS_ON(Square)
-ENABLE_OPERATORS_ON(File)
-ENABLE_OPERATORS_ON(Rank)
-
-/// Added operators for adding integers to a Value
-inline Value operator+(Value v, int i) { return Value(int(v) + i); }
-inline Value operator-(Value v, int i) { return Value(int(v) - i); }
-
-ENABLE_SAFE_OPERATORS_ON(Score)
+/// Extracting the signed lower and upper 16 bits is not so trivial because
+/// according to the standard a simple cast to short is implementation defined
+/// and so is a right shift of a signed integer.
+inline Value eg_value(Score s) {
+ union { uint16_t u; int16_t s; } eg = { uint16_t(unsigned(s + 0x8000) >> 16) };
+ return Value(eg.s);
+}
+
+inline Value mg_value(Score s) {
+ union { uint16_t u; int16_t s; } mg = { uint16_t(unsigned(s)) };
+ return Value(mg.s);
+}
+
+#define ENABLE_BASE_OPERATORS_ON(T) \
+constexpr T operator+(T d1, T d2) { return T(int(d1) + int(d2)); } \
+constexpr T operator-(T d1, T d2) { return T(int(d1) - int(d2)); } \
+constexpr T operator-(T d) { return T(-int(d)); } \
+inline T& operator+=(T& d1, T d2) { return d1 = d1 + d2; } \
+inline T& operator-=(T& d1, T d2) { return d1 = d1 - d2; }
+
+#define ENABLE_INCR_OPERATORS_ON(T) \
+inline T& operator++(T& d) { return d = T(int(d) + 1); } \
+inline T& operator--(T& d) { return d = T(int(d) - 1); }
+
+#define ENABLE_FULL_OPERATORS_ON(T) \
+ENABLE_BASE_OPERATORS_ON(T) \
+constexpr T operator*(int i, T d) { return T(i * int(d)); } \
+constexpr T operator*(T d, int i) { return T(int(d) * i); } \
+constexpr T operator/(T d, int i) { return T(int(d) / i); } \
+constexpr int operator/(T d1, T d2) { return int(d1) / int(d2); } \
+inline T& operator*=(T& d, int i) { return d = T(int(d) * i); } \
+inline T& operator/=(T& d, int i) { return d = T(int(d) / i); }
+
+ENABLE_FULL_OPERATORS_ON(Value)
+ENABLE_FULL_OPERATORS_ON(Depth)
+ENABLE_FULL_OPERATORS_ON(Direction)
+
+ENABLE_INCR_OPERATORS_ON(PieceType)
+ENABLE_INCR_OPERATORS_ON(Piece)
+ENABLE_INCR_OPERATORS_ON(Square)
+ENABLE_INCR_OPERATORS_ON(File)
+ENABLE_INCR_OPERATORS_ON(Rank)
+
+ENABLE_BASE_OPERATORS_ON(Score)
+
+#undef ENABLE_FULL_OPERATORS_ON
+#undef ENABLE_INCR_OPERATORS_ON
+#undef ENABLE_BASE_OPERATORS_ON
+
+/// Additional operators to add integers to a Value
+constexpr Value operator+(Value v, int i) { return Value(int(v) + i); }
+constexpr Value operator-(Value v, int i) { return Value(int(v) - i); }
+inline Value& operator+=(Value& v, int i) { return v = v + i; }
+inline Value& operator-=(Value& v, int i) { return v = v - i; }
+
+/// Additional operators to add a Direction to a Square
+constexpr Square operator+(Square s, Direction d) { return Square(int(s) + int(d)); }
+constexpr Square operator-(Square s, Direction d) { return Square(int(s) - int(d)); }
+inline Square& operator+=(Square& s, Direction d) { return s = s + d; }
+inline Square& operator-=(Square& s, Direction d) { return s = s - d; }
/// Only declared but not defined. We don't want to multiply two scores due to
/// a very high risk of overflow. So user should explicitly convert to integer.
-inline Score operator*(Score s1, Score s2);
+Score operator*(Score, Score) = delete;
/// Division of a Score must be handled separately for each term
inline Score operator/(Score s, int i) {
return make_score(mg_value(s) / i, eg_value(s) / i);
}
-#undef ENABLE_OPERATORS_ON
-#undef ENABLE_SAFE_OPERATORS_ON
-
-const Value PawnValueMidgame = Value(0x0C6);
-const Value PawnValueEndgame = Value(0x102);
-const Value KnightValueMidgame = Value(0x331);
-const Value KnightValueEndgame = Value(0x34E);
-const Value BishopValueMidgame = Value(0x344);
-const Value BishopValueEndgame = Value(0x359);
-const Value RookValueMidgame = Value(0x4F6);
-const Value RookValueEndgame = Value(0x4FE);
-const Value QueenValueMidgame = Value(0x9D9);
-const Value QueenValueEndgame = Value(0x9FE);
-
-extern const Value PieceValueMidgame[17]; // Indexed by Piece or PieceType
-extern const Value PieceValueEndgame[17];
-extern int SquareDistance[64][64];
-
-inline Color operator~(Color c) {
- return Color(c ^ 1);
-}
+/// Multiplication of a Score by an integer. We check for overflow in debug mode.
+inline Score operator*(Score s, int i) {
-inline Square operator~(Square s) {
- return Square(s ^ 56);
-}
+ Score result = Score(int(s) * i);
-inline Value mate_in(int ply) {
- return VALUE_MATE - ply;
-}
+ assert(eg_value(result) == (i * eg_value(s)));
+ assert(mg_value(result) == (i * mg_value(s)));
+ assert((i == 0) || (result / i) == s);
-inline Value mated_in(int ply) {
- return -VALUE_MATE + ply;
-}
-
-inline Piece make_piece(Color c, PieceType pt) {
- return Piece((c << 3) | pt);
+ return result;
}
-inline PieceType type_of(Piece p) {
- return PieceType(p & 7);
+constexpr Color operator~(Color c) {
+ return Color(c ^ BLACK); // Toggle color
}
-inline Color color_of(Piece p) {
- return Color(p >> 3);
+constexpr Square operator~(Square s) {
+ return Square(s ^ SQ_A8); // Vertical flip SQ_A1 -> SQ_A8
}
-inline Square make_square(File f, Rank r) {
- return Square((r << 3) | f);
+constexpr File operator~(File f) {
+ return File(f ^ FILE_H); // Horizontal flip FILE_A -> FILE_H
}
-inline bool square_is_ok(Square s) {
- return s >= SQ_A1 && s <= SQ_H8;
+constexpr Piece operator~(Piece pc) {
+ return Piece(pc ^ 8); // Swap color of piece B_KNIGHT -> W_KNIGHT
}
-inline File file_of(Square s) {
- return File(s & 7);
+constexpr CastlingRight operator|(Color c, CastlingSide s) {
+ return CastlingRight(WHITE_OO << ((s == QUEEN_SIDE) + 2 * c));
}
-inline Rank rank_of(Square s) {
- return Rank(s >> 3);
+constexpr Value mate_in(int ply) {
+ return VALUE_MATE - ply;
}
-inline Square mirror(Square s) {
- return Square(s ^ 7);
+constexpr Value mated_in(int ply) {
+ return -VALUE_MATE + ply;
}
-inline Square relative_square(Color c, Square s) {
- return Square(s ^ (c * 56));
+constexpr Square make_square(File f, Rank r) {
+ return Square((r << 3) + f);
}
-inline Rank relative_rank(Color c, Rank r) {
- return Rank(r ^ (c * 7));
+constexpr Piece make_piece(Color c, PieceType pt) {
+ return Piece((c << 3) + pt);
}
-inline Rank relative_rank(Color c, Square s) {
- return relative_rank(c, rank_of(s));
+constexpr PieceType type_of(Piece pc) {
+ return PieceType(pc & 7);
}
-inline bool opposite_colors(Square s1, Square s2) {
- int s = s1 ^ s2;
- return ((s >> 3) ^ s) & 1;
+inline Color color_of(Piece pc) {
+ assert(pc != NO_PIECE);
+ return Color(pc >> 3);
}
-inline int file_distance(Square s1, Square s2) {
- return abs(file_of(s1) - file_of(s2));
+constexpr bool is_ok(Square s) {
+ return s >= SQ_A1 && s <= SQ_H8;
}
-inline int rank_distance(Square s1, Square s2) {
- return abs(rank_of(s1) - rank_of(s2));
+constexpr File file_of(Square s) {
+ return File(s & 7);
}
-inline int square_distance(Square s1, Square s2) {
- return SquareDistance[s1][s2];
+constexpr Rank rank_of(Square s) {
+ return Rank(s >> 3);
}
-inline char piece_type_to_char(PieceType pt) {
- return " PNBRQK"[pt];
+constexpr Square relative_square(Color c, Square s) {
+ return Square(s ^ (c * 56));
}
-inline char file_to_char(File f) {
- return char(f - FILE_A + int('a'));
+constexpr Rank relative_rank(Color c, Rank r) {
+ return Rank(r ^ (c * 7));
}
-inline char rank_to_char(Rank r) {
- return char(r - RANK_1 + int('1'));
+constexpr Rank relative_rank(Color c, Square s) {
+ return relative_rank(c, rank_of(s));
}
-inline Square pawn_push(Color c) {
- return c == WHITE ? DELTA_N : DELTA_S;
+constexpr Direction pawn_push(Color c) {
+ return c == WHITE ? NORTH : SOUTH;
}
-inline Square from_sq(Move m) {
+constexpr Square from_sq(Move m) {
return Square((m >> 6) & 0x3F);
}
-inline Square to_sq(Move m) {
+constexpr Square to_sq(Move m) {
return Square(m & 0x3F);
}
-inline bool is_special(Move m) {
- return m & (3 << 14);
+constexpr int from_to(Move m) {
+ return m & 0xFFF;
}
-inline bool is_promotion(Move m) {
- return (m & (3 << 14)) == (1 << 14);
+constexpr MoveType type_of(Move m) {
+ return MoveType(m & (3 << 14));
}
-inline int is_enpassant(Move m) {
- return (m & (3 << 14)) == (2 << 14);
+constexpr PieceType promotion_type(Move m) {
+ return PieceType(((m >> 12) & 3) + KNIGHT);
}
-inline int is_castle(Move m) {
- return (m & (3 << 14)) == (3 << 14);
+constexpr Move make_move(Square from, Square to) {
+ return Move((from << 6) + to);
}
-inline PieceType promotion_piece_type(Move m) {
- return PieceType(((m >> 12) & 3) + 2);
-}
-
-inline Move make_move(Square from, Square to) {
- return Move(to | (from << 6));
-}
-
-inline Move make_promotion(Square from, Square to, PieceType pt) {
- return Move(to | (from << 6) | (1 << 14) | ((pt - 2) << 12)) ;
-}
-
-inline Move make_enpassant(Square from, Square to) {
- return Move(to | (from << 6) | (2 << 14));
-}
-
-inline Move make_castle(Square from, Square to) {
- return Move(to | (from << 6) | (3 << 14));
-}
-
-inline bool is_ok(Move m) {
- return from_sq(m) != to_sq(m); // Catches also MOVE_NULL and MOVE_NONE
-}
-
-#include <string>
-
-inline const std::string square_to_string(Square s) {
- char ch[] = { file_to_char(file_of(s)), rank_to_char(rank_of(s)), 0 };
- return ch;
+template<MoveType T>
+constexpr Move make(Square from, Square to, PieceType pt = KNIGHT) {
+ return Move(T + ((pt - KNIGHT) << 12) + (from << 6) + to);
}
-/// Our insertion sort implementation, works with pointers and iterators and is
-/// guaranteed to be stable, as is needed.
-template<typename T, typename K>
-void sort(K first, K last)
-{
- T tmp;
- K p, q;
-
- for (p = first + 1; p < last; p++)
- {
- tmp = *p;
- for (q = p; q != first && *(q-1) < tmp; --q)
- *q = *(q-1);
- *q = tmp;
- }
+constexpr bool is_ok(Move m) {
+ return from_sq(m) != to_sq(m); // Catch MOVE_NULL and MOVE_NONE
}
-#endif // !defined(TYPES_H_INCLUDED)
+#endif // #ifndef TYPES_H_INCLUDED
projects / stockfish / blobdiff