2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
6 Stockfish is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 Stockfish is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #ifndef TYPES_H_INCLUDED
21 #define TYPES_H_INCLUDED
23 /// When compiling with provided Makefile (e.g. for Linux and OSX), configuration
24 /// is done automatically. To get started type 'make help'.
26 /// When Makefile is not used (e.g. with Microsoft Visual Studio) some switches
27 /// need to be set manually:
29 /// -DNDEBUG | Disable debugging mode. Always use this for release.
31 /// -DNO_PREFETCH | Disable use of prefetch asm-instruction. You may need this to
32 /// | run on some very old machines.
34 /// -DUSE_POPCNT | Add runtime support for use of popcnt asm-instruction. Works
35 /// | only in 64-bit mode and requires hardware with popcnt support.
44 // Disable some silly and noisy warning from MSVC compiler
45 #pragma warning(disable: 4127) // Conditional expression is constant
46 #pragma warning(disable: 4146) // Unary minus operator applied to unsigned type
47 #pragma warning(disable: 4800) // Forcing value to bool 'true' or 'false'
50 /// Predefined macros hell:
52 /// __GNUC__ Compiler is gcc, Clang or Intel on Linux
53 /// __INTEL_COMPILER Compiler is Intel
54 /// _MSC_VER Compiler is MSVC or Intel on Windows
55 /// _WIN32 Building on Windows (any)
56 /// _WIN64 Building on Windows 64 bit
58 #if defined(_WIN64) && !defined(IS_64BIT) // Last condition means Makefile is not used
59 # include <intrin.h> // MSVC popcnt and bsfq instrinsics
64 #if defined(USE_POPCNT) && defined(__INTEL_COMPILER) && defined(_MSC_VER)
65 # include <nmmintrin.h> // Intel header for _mm_popcnt_u64() intrinsic
68 #if !defined(NO_PREFETCH) && (defined(__INTEL_COMPILER) || defined(_MSC_VER))
69 # include <xmmintrin.h> // Intel and Microsoft header for _mm_prefetch()
73 # include <immintrin.h> // Header for _pext_u64() intrinsic
74 # define pext(b, m) _pext_u64(b, m)
76 # define pext(b, m) (0)
80 # define FORCE_INLINE __forceinline
81 #elif defined(__GNUC__)
82 # define FORCE_INLINE inline __attribute__((always_inline))
84 # define FORCE_INLINE inline
88 const bool HasPopCnt = true;
90 const bool HasPopCnt = false;
94 const bool HasPext = true;
96 const bool HasPext = false;
100 const bool Is64Bit = true;
102 const bool Is64Bit = false;
105 typedef uint64_t Key;
106 typedef uint64_t Bitboard;
108 const int MAX_MOVES = 256;
109 const int MAX_PLY = 128;
111 /// A move needs 16 bits to be stored
113 /// bit 0- 5: destination square (from 0 to 63)
114 /// bit 6-11: origin square (from 0 to 63)
115 /// bit 12-13: promotion piece type - 2 (from KNIGHT-2 to QUEEN-2)
116 /// bit 14-15: special move flag: promotion (1), en passant (2), castling (3)
117 /// NOTE: EN-PASSANT bit is set only when a pawn can be captured
119 /// Special cases are MOVE_NONE and MOVE_NULL. We can sneak these in because in
120 /// any normal move destination square is always different from origin square
121 /// while MOVE_NONE and MOVE_NULL have the same origin and destination square.
136 WHITE, BLACK, NO_COLOR, COLOR_NB = 2
140 KING_SIDE, QUEEN_SIDE, CASTLING_SIDE_NB = 2
146 WHITE_OOO = WHITE_OO << 1,
147 BLACK_OO = WHITE_OO << 2,
148 BLACK_OOO = WHITE_OO << 3,
149 ANY_CASTLING = WHITE_OO | WHITE_OOO | BLACK_OO | BLACK_OOO,
150 CASTLING_RIGHT_NB = 16
153 template<Color C, CastlingSide S> struct MakeCastling {
154 static const CastlingRight
155 right = C == WHITE ? S == QUEEN_SIDE ? WHITE_OOO : WHITE_OO
156 : S == QUEEN_SIDE ? BLACK_OOO : BLACK_OO;
162 MG = 0, EG = 1, PHASE_NB = 2
166 SCALE_FACTOR_DRAW = 0,
167 SCALE_FACTOR_ONEPAWN = 48,
168 SCALE_FACTOR_NORMAL = 64,
169 SCALE_FACTOR_MAX = 128,
170 SCALE_FACTOR_NONE = 255
177 BOUND_EXACT = BOUND_UPPER | BOUND_LOWER
183 VALUE_KNOWN_WIN = 10000,
185 VALUE_INFINITE = 32001,
188 VALUE_MATE_IN_MAX_PLY = VALUE_MATE - 2 * MAX_PLY,
189 VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + 2 * MAX_PLY,
191 PawnValueMg = 198, PawnValueEg = 258,
192 KnightValueMg = 817, KnightValueEg = 846,
193 BishopValueMg = 836, BishopValueEg = 857,
194 RookValueMg = 1270, RookValueEg = 1278,
195 QueenValueMg = 2521, QueenValueEg = 2558,
197 MidgameLimit = 15581, EndgameLimit = 3998
201 NO_PIECE_TYPE, PAWN, KNIGHT, BISHOP, ROOK, QUEEN, KING,
208 W_PAWN = 1, W_KNIGHT, W_BISHOP, W_ROOK, W_QUEEN, W_KING,
209 B_PAWN = 9, B_KNIGHT, B_BISHOP, B_ROOK, B_QUEEN, B_KING,
219 DEPTH_QS_NO_CHECKS = -1,
220 DEPTH_QS_RECAPTURES = -5,
227 SQ_A1, SQ_B1, SQ_C1, SQ_D1, SQ_E1, SQ_F1, SQ_G1, SQ_H1,
228 SQ_A2, SQ_B2, SQ_C2, SQ_D2, SQ_E2, SQ_F2, SQ_G2, SQ_H2,
229 SQ_A3, SQ_B3, SQ_C3, SQ_D3, SQ_E3, SQ_F3, SQ_G3, SQ_H3,
230 SQ_A4, SQ_B4, SQ_C4, SQ_D4, SQ_E4, SQ_F4, SQ_G4, SQ_H4,
231 SQ_A5, SQ_B5, SQ_C5, SQ_D5, SQ_E5, SQ_F5, SQ_G5, SQ_H5,
232 SQ_A6, SQ_B6, SQ_C6, SQ_D6, SQ_E6, SQ_F6, SQ_G6, SQ_H6,
233 SQ_A7, SQ_B7, SQ_C7, SQ_D7, SQ_E7, SQ_F7, SQ_G7, SQ_H7,
234 SQ_A8, SQ_B8, SQ_C8, SQ_D8, SQ_E8, SQ_F8, SQ_G8, SQ_H8,
244 DELTA_NN = DELTA_N + DELTA_N,
245 DELTA_NE = DELTA_N + DELTA_E,
246 DELTA_SE = DELTA_S + DELTA_E,
247 DELTA_SS = DELTA_S + DELTA_S,
248 DELTA_SW = DELTA_S + DELTA_W,
249 DELTA_NW = DELTA_N + DELTA_W
253 FILE_A, FILE_B, FILE_C, FILE_D, FILE_E, FILE_F, FILE_G, FILE_H, FILE_NB
257 RANK_1, RANK_2, RANK_3, RANK_4, RANK_5, RANK_6, RANK_7, RANK_8, RANK_NB
261 /// Score enum stores a middlegame and an endgame value in a single integer
262 /// (enum). The least significant 16 bits are used to store the endgame value
263 /// and the upper 16 bits are used to store the middlegame value.
264 enum Score : int { SCORE_ZERO };
266 inline Score make_score(int mg, int eg) {
267 return Score((mg << 16) + eg);
270 /// Extracting the signed lower and upper 16 bits is not so trivial because
271 /// according to the standard a simple cast to short is implementation defined
272 /// and so is a right shift of a signed integer.
273 inline Value mg_value(Score s) {
275 union { uint16_t u; int16_t s; } mg = { uint16_t(unsigned(s + 0x8000) >> 16) };
279 inline Value eg_value(Score s) {
281 union { uint16_t u; int16_t s; } eg = { uint16_t(unsigned(s)) };
285 #define ENABLE_BASE_OPERATORS_ON(T) \
286 inline T operator+(T d1, T d2) { return T(int(d1) + int(d2)); } \
287 inline T operator-(T d1, T d2) { return T(int(d1) - int(d2)); } \
288 inline T operator*(int i, T d) { return T(i * int(d)); } \
289 inline T operator*(T d, int i) { return T(int(d) * i); } \
290 inline T operator-(T d) { return T(-int(d)); } \
291 inline T& operator+=(T& d1, T d2) { return d1 = d1 + d2; } \
292 inline T& operator-=(T& d1, T d2) { return d1 = d1 - d2; } \
293 inline T& operator*=(T& d, int i) { return d = T(int(d) * i); }
295 #define ENABLE_FULL_OPERATORS_ON(T) \
296 ENABLE_BASE_OPERATORS_ON(T) \
297 inline T& operator++(T& d) { return d = T(int(d) + 1); } \
298 inline T& operator--(T& d) { return d = T(int(d) - 1); } \
299 inline T operator/(T d, int i) { return T(int(d) / i); } \
300 inline int operator/(T d1, T d2) { return int(d1) / int(d2); } \
301 inline T& operator/=(T& d, int i) { return d = T(int(d) / i); }
303 ENABLE_FULL_OPERATORS_ON(Value)
304 ENABLE_FULL_OPERATORS_ON(PieceType)
305 ENABLE_FULL_OPERATORS_ON(Piece)
306 ENABLE_FULL_OPERATORS_ON(Color)
307 ENABLE_FULL_OPERATORS_ON(Depth)
308 ENABLE_FULL_OPERATORS_ON(Square)
309 ENABLE_FULL_OPERATORS_ON(File)
310 ENABLE_FULL_OPERATORS_ON(Rank)
312 ENABLE_BASE_OPERATORS_ON(Score)
314 #undef ENABLE_FULL_OPERATORS_ON
315 #undef ENABLE_BASE_OPERATORS_ON
317 /// Additional operators to add integers to a Value
318 inline Value operator+(Value v, int i) { return Value(int(v) + i); }
319 inline Value operator-(Value v, int i) { return Value(int(v) - i); }
320 inline Value& operator+=(Value& v, int i) { return v = v + i; }
321 inline Value& operator-=(Value& v, int i) { return v = v - i; }
323 /// Only declared but not defined. We don't want to multiply two scores due to
324 /// a very high risk of overflow. So user should explicitly convert to integer.
325 inline Score operator*(Score s1, Score s2);
327 /// Division of a Score must be handled separately for each term
328 inline Score operator/(Score s, int i) {
329 return make_score(mg_value(s) / i, eg_value(s) / i);
332 extern Value PieceValue[PHASE_NB][PIECE_NB];
334 inline Color operator~(Color c) {
335 return Color(c ^ BLACK);
338 inline Square operator~(Square s) {
339 return Square(s ^ SQ_A8); // Vertical flip SQ_A1 -> SQ_A8
342 inline CastlingRight operator|(Color c, CastlingSide s) {
343 return CastlingRight(WHITE_OO << ((s == QUEEN_SIDE) + 2 * c));
346 inline Value mate_in(int ply) {
347 return VALUE_MATE - ply;
350 inline Value mated_in(int ply) {
351 return -VALUE_MATE + ply;
354 inline Square make_square(File f, Rank r) {
355 return Square((r << 3) | f);
358 inline Piece make_piece(Color c, PieceType pt) {
359 return Piece((c << 3) | pt);
362 inline PieceType type_of(Piece pc) {
363 return PieceType(pc & 7);
366 inline Color color_of(Piece pc) {
367 assert(pc != NO_PIECE);
368 return Color(pc >> 3);
371 inline bool is_ok(Square s) {
372 return s >= SQ_A1 && s <= SQ_H8;
375 inline File file_of(Square s) {
379 inline Rank rank_of(Square s) {
383 inline Square relative_square(Color c, Square s) {
384 return Square(s ^ (c * 56));
387 inline Rank relative_rank(Color c, Rank r) {
388 return Rank(r ^ (c * 7));
391 inline Rank relative_rank(Color c, Square s) {
392 return relative_rank(c, rank_of(s));
395 inline bool opposite_colors(Square s1, Square s2) {
396 int s = int(s1) ^ int(s2);
397 return ((s >> 3) ^ s) & 1;
400 inline Square pawn_push(Color c) {
401 return c == WHITE ? DELTA_N : DELTA_S;
404 inline Square from_sq(Move m) {
405 return Square((m >> 6) & 0x3F);
408 inline Square to_sq(Move m) {
409 return Square(m & 0x3F);
412 inline MoveType type_of(Move m) {
413 return MoveType(m & (3 << 14));
416 inline PieceType promotion_type(Move m) {
417 return PieceType(((m >> 12) & 3) + 2);
420 inline Move make_move(Square from, Square to) {
421 return Move(to | (from << 6));
425 inline Move make(Square from, Square to, PieceType pt = KNIGHT) {
426 return Move(to | (from << 6) | T | ((pt - KNIGHT) << 12));
429 inline bool is_ok(Move m) {
430 return from_sq(m) != to_sq(m); // Catch MOVE_NULL and MOVE_NONE
433 #endif // #ifndef TYPES_H_INCLUDED