2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008-2010 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 #if !defined(TYPES_H_INCLUDED)
21 #define TYPES_H_INCLUDED
28 // Disable some silly and noisy warning from MSVC compiler
29 #pragma warning(disable: 4800) // Forcing value to bool 'true' or 'false'
30 #pragma warning(disable: 4127) // Conditional expression is constant
31 #pragma warning(disable: 4146) // Unary minus operator applied to unsigned type
33 // MSVC does not support <inttypes.h>
34 typedef signed __int8 int8_t;
35 typedef unsigned __int8 uint8_t;
36 typedef signed __int16 int16_t;
37 typedef unsigned __int16 uint16_t;
38 typedef signed __int32 int32_t;
39 typedef unsigned __int32 uint32_t;
40 typedef signed __int64 int64_t;
41 typedef unsigned __int64 uint64_t;
49 #define Min(x, y) (((x) < (y)) ? (x) : (y))
50 #define Max(x, y) (((x) < (y)) ? (y) : (x))
56 //// For Linux and OSX configuration is done automatically using Makefile.
57 //// To get started type "make help".
59 //// For windows part of the configuration is detected automatically, but
60 //// some switches need to be set manually:
62 //// -DNDEBUG | Disable debugging mode. Use always.
64 //// -DNO_PREFETCH | Disable use of prefetch asm-instruction. A must if you want the
65 //// | executable to run on some very old machines.
67 //// -DUSE_POPCNT | Add runtime support for use of popcnt asm-instruction.
68 //// | Works only in 64-bit mode. For compiling requires hardware
69 //// | with popcnt support. Around 4% speed-up.
71 //// -DOLD_LOCKS | By default under Windows are used the fast Slim Reader/Writer (SRW)
72 //// | Locks and Condition Variables: these are not supported by Windows XP
73 //// | and older, to compile for those platforms you should enable OLD_LOCKS.
75 // Automatic detection for 64-bit under Windows
80 // Automatic detection for use of bsfq asm-instruction under Windows
85 // Intel header for _mm_popcnt_u64() intrinsic
86 #if defined(USE_POPCNT) && defined(_MSC_VER) && defined(__INTEL_COMPILER)
87 #include <nmmintrin.h>
90 // Cache line alignment specification
91 #if defined(_MSC_VER) || defined(__INTEL_COMPILER)
92 #define CACHE_LINE_ALIGNMENT __declspec(align(64))
94 #define CACHE_LINE_ALIGNMENT __attribute__ ((aligned(64)))
97 // Define a __cpuid() function for gcc compilers, for Intel and MSVC
98 // is already available as an intrinsic.
101 #elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
102 inline void __cpuid(int CPUInfo[4], int InfoType)
104 int* eax = CPUInfo + 0;
105 int* ebx = CPUInfo + 1;
106 int* ecx = CPUInfo + 2;
107 int* edx = CPUInfo + 3;
111 __asm__("cpuid" : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx)
112 : "0" (*eax), "2" (*ecx));
115 inline void __cpuid(int CPUInfo[4], int)
117 CPUInfo[0] = CPUInfo[1] = CPUInfo[2] = CPUInfo[3] = 0;
121 // Define FORCE_INLINE macro to force inlining overriding compiler choice
122 #if defined(_MSC_VER)
123 #define FORCE_INLINE __forceinline
124 #elif defined(__GNUC__)
125 #define FORCE_INLINE inline __attribute__((always_inline))
127 #define FORCE_INLINE inline
130 /// cpu_has_popcnt() detects support for popcnt instruction at runtime
131 inline bool cpu_has_popcnt() {
133 int CPUInfo[4] = {-1};
134 __cpuid(CPUInfo, 0x00000001);
135 return (CPUInfo[2] >> 23) & 1;
138 /// CpuHasPOPCNT is a global constant initialized at startup that
139 /// is set to true if CPU on which application runs supports popcnt
140 /// hardware instruction. Unless USE_POPCNT is not defined.
141 #if defined(USE_POPCNT)
142 const bool CpuHasPOPCNT = cpu_has_popcnt();
144 const bool CpuHasPOPCNT = false;
148 /// CpuIs64Bit is a global constant initialized at compile time that
149 /// is set to true if CPU on which application runs is a 64 bits.
150 #if defined(IS_64BIT)
151 const bool CpuIs64Bit = true;
153 const bool CpuIs64Bit = false;
158 typedef uint64_t Key;
159 typedef uint64_t Bitboard;
163 VALUE_TYPE_UPPER = 1,
164 VALUE_TYPE_LOWER = 2,
165 VALUE_TYPE_EXACT = VALUE_TYPE_UPPER | VALUE_TYPE_LOWER
171 VALUE_KNOWN_WIN = 15000,
173 VALUE_INFINITE = 30001,
175 VALUE_ENSURE_INTEGER_SIZE_P = INT_MAX,
176 VALUE_ENSURE_INTEGER_SIZE_N = INT_MIN
181 PAWN = 1, KNIGHT = 2, BISHOP = 3, ROOK = 4, QUEEN = 5, KING = 6
185 PIECE_NONE_DARK_SQ = 0, WP = 1, WN = 2, WB = 3, WR = 4, WQ = 5, WK = 6,
186 BP = 9, BN = 10, BB = 11, BR = 12, BQ = 13, BK = 14, PIECE_NONE = 16
190 WHITE, BLACK, COLOR_NONE
197 DEPTH_ZERO = 0 * ONE_PLY,
198 DEPTH_QS_CHECKS = -1 * ONE_PLY,
199 DEPTH_QS_NO_CHECKS = -2 * ONE_PLY,
201 DEPTH_NONE = -127 * ONE_PLY
205 SQ_A1, SQ_B1, SQ_C1, SQ_D1, SQ_E1, SQ_F1, SQ_G1, SQ_H1,
206 SQ_A2, SQ_B2, SQ_C2, SQ_D2, SQ_E2, SQ_F2, SQ_G2, SQ_H2,
207 SQ_A3, SQ_B3, SQ_C3, SQ_D3, SQ_E3, SQ_F3, SQ_G3, SQ_H3,
208 SQ_A4, SQ_B4, SQ_C4, SQ_D4, SQ_E4, SQ_F4, SQ_G4, SQ_H4,
209 SQ_A5, SQ_B5, SQ_C5, SQ_D5, SQ_E5, SQ_F5, SQ_G5, SQ_H5,
210 SQ_A6, SQ_B6, SQ_C6, SQ_D6, SQ_E6, SQ_F6, SQ_G6, SQ_H6,
211 SQ_A7, SQ_B7, SQ_C7, SQ_D7, SQ_E7, SQ_F7, SQ_G7, SQ_H7,
212 SQ_A8, SQ_B8, SQ_C8, SQ_D8, SQ_E8, SQ_F8, SQ_G8, SQ_H8,
220 DELTA_NN = DELTA_N + DELTA_N,
221 DELTA_NE = DELTA_N + DELTA_E,
222 DELTA_SE = DELTA_S + DELTA_E,
223 DELTA_SS = DELTA_S + DELTA_S,
224 DELTA_SW = DELTA_S + DELTA_W,
225 DELTA_NW = DELTA_N + DELTA_W
229 FILE_A, FILE_B, FILE_C, FILE_D, FILE_E, FILE_F, FILE_G, FILE_H
233 RANK_1, RANK_2, RANK_3, RANK_4, RANK_5, RANK_6, RANK_7, RANK_8
241 SCALE_FACTOR_ZERO = 0,
242 SCALE_FACTOR_NORMAL = 64,
243 SCALE_FACTOR_MAX = 128,
244 SCALE_FACTOR_NONE = 255
248 /// Score enum keeps a midgame and an endgame value in a single
249 /// integer (enum), first LSB 16 bits are used to store endgame
250 /// value, while upper bits are used for midgame value. Compiler
251 /// is free to choose the enum type as long as can keep its data,
252 /// so ensure Score to be an integer type.
255 SCORE_ENSURE_INTEGER_SIZE_P = INT_MAX,
256 SCORE_ENSURE_INTEGER_SIZE_N = INT_MIN
259 #define ENABLE_OPERATORS_ON(T) \
260 inline T operator+ (const T d1, const T d2) { return T(int(d1) + int(d2)); } \
261 inline T operator- (const T d1, const T d2) { return T(int(d1) - int(d2)); } \
262 inline T operator* (int i, const T d) { return T(i * int(d)); } \
263 inline T operator* (const T d, int i) { return T(int(d) * i); } \
264 inline T operator/ (const T d, int i) { return T(int(d) / i); } \
265 inline T operator- (const T d) { return T(-int(d)); } \
266 inline T operator++ (T& d, int) {d = T(int(d) + 1); return d; } \
267 inline T operator-- (T& d, int) { d = T(int(d) - 1); return d; } \
268 inline void operator+= (T& d1, const T d2) { d1 = d1 + d2; } \
269 inline void operator-= (T& d1, const T d2) { d1 = d1 - d2; } \
270 inline void operator*= (T& d, int i) { d = T(int(d) * i); } \
271 inline void operator/= (T& d, int i) { d = T(int(d) / i); }
273 ENABLE_OPERATORS_ON(Value)
274 ENABLE_OPERATORS_ON(PieceType)
275 ENABLE_OPERATORS_ON(Piece)
276 ENABLE_OPERATORS_ON(Color)
277 ENABLE_OPERATORS_ON(Depth)
278 ENABLE_OPERATORS_ON(Square)
279 ENABLE_OPERATORS_ON(File)
280 ENABLE_OPERATORS_ON(Rank)
282 #undef ENABLE_OPERATORS_ON
284 // Extra operators for adding integers to a Value
285 inline Value operator+ (Value v, int i) { return Value(int(v) + i); }
286 inline Value operator- (Value v, int i) { return Value(int(v) - i); }
288 // Extracting the _signed_ lower and upper 16 bits it not so trivial
289 // because according to the standard a simple cast to short is
290 // implementation defined and so is a right shift of a signed integer.
291 inline Value mg_value(Score s) { return Value(((int(s) + 32768) & ~0xffff) / 0x10000); }
293 // Unfortunatly on Intel 64 bit we have a small speed regression, so use a faster code in
294 // this case, although not 100% standard compliant it seems to work for Intel and MSVC.
295 #if defined(IS_64BIT) && (!defined(__GNUC__) || defined(__INTEL_COMPILER))
296 inline Value eg_value(Score s) { return Value(int16_t(s & 0xffff)); }
298 inline Value eg_value(Score s) { return Value((int)(unsigned(s) & 0x7fffu) - (int)(unsigned(s) & 0x8000u)); }
301 inline Score make_score(int mg, int eg) { return Score((mg << 16) + eg); }
303 // Division must be handled separately for each term
304 inline Score operator/(Score s, int i) { return make_score(mg_value(s) / i, eg_value(s) / i); }
306 // Only declared but not defined. We don't want to multiply two scores due to
307 // a very high risk of overflow. So user should explicitly convert to integer.
308 inline Score operator*(Score s1, Score s2);
310 // Remaining Score operators are standard
311 inline Score operator+ (const Score d1, const Score d2) { return Score(int(d1) + int(d2)); }
312 inline Score operator- (const Score d1, const Score d2) { return Score(int(d1) - int(d2)); }
313 inline Score operator* (int i, const Score d) { return Score(i * int(d)); }
314 inline Score operator* (const Score d, int i) { return Score(int(d) * i); }
315 inline Score operator- (const Score d) { return Score(-int(d)); }
316 inline void operator+= (Score& d1, const Score d2) { d1 = d1 + d2; }
317 inline void operator-= (Score& d1, const Score d2) { d1 = d1 - d2; }
318 inline void operator*= (Score& d, int i) { d = Score(int(d) * i); }
319 inline void operator/= (Score& d, int i) { d = Score(int(d) / i); }
321 const Value PawnValueMidgame = Value(0x0C6);
322 const Value PawnValueEndgame = Value(0x102);
323 const Value KnightValueMidgame = Value(0x331);
324 const Value KnightValueEndgame = Value(0x34E);
325 const Value BishopValueMidgame = Value(0x344);
326 const Value BishopValueEndgame = Value(0x359);
327 const Value RookValueMidgame = Value(0x4F6);
328 const Value RookValueEndgame = Value(0x4FE);
329 const Value QueenValueMidgame = Value(0x9D9);
330 const Value QueenValueEndgame = Value(0x9FE);
332 inline Value value_mate_in(int ply) {
333 return VALUE_MATE - ply;
336 inline Value value_mated_in(int ply) {
337 return -VALUE_MATE + ply;
340 inline Piece make_piece(Color c, PieceType pt) {
341 return Piece((int(c) << 3) | int(pt));
344 inline PieceType type_of_piece(Piece p) {
345 return PieceType(int(p) & 7);
348 inline Color color_of_piece(Piece p) {
349 return Color(int(p) >> 3);
352 inline Color opposite_color(Color c) {
353 return Color(int(c) ^ 1);
356 inline bool color_is_ok(Color c) {
357 return c == WHITE || c == BLACK;
360 inline bool piece_type_is_ok(PieceType pt) {
361 return pt >= PAWN && pt <= KING;
364 inline bool piece_is_ok(Piece p) {
365 return piece_type_is_ok(type_of_piece(p)) && color_is_ok(color_of_piece(p));
368 inline char piece_type_to_char(PieceType pt) {
369 static const char ch[] = " PNBRQK";
373 inline Square make_square(File f, Rank r) {
374 return Square((int(r) << 3) | int(f));
377 inline File square_file(Square s) {
378 return File(int(s) & 7);
381 inline Rank square_rank(Square s) {
382 return Rank(int(s) >> 3);
385 inline Square flip_square(Square s) {
386 return Square(int(s) ^ 56);
389 inline Square flop_square(Square s) {
390 return Square(int(s) ^ 7);
393 inline Square relative_square(Color c, Square s) {
394 return Square(int(s) ^ (int(c) * 56));
397 inline Rank relative_rank(Color c, Rank r) {
398 return Rank(int(r) ^ (int(c) * 7));
401 inline Rank relative_rank(Color c, Square s) {
402 return relative_rank(c, square_rank(s));
405 inline SquareColor square_color(Square s) {
406 return SquareColor(int(square_rank(s) + s) & 1);
409 inline bool opposite_color_squares(Square s1, Square s2) {
410 int s = int(s1) ^ int(s2);
411 return ((s >> 3) ^ s) & 1;
414 inline int file_distance(Square s1, Square s2) {
415 return abs(square_file(s1) - square_file(s2));
418 inline int rank_distance(Square s1, Square s2) {
419 return abs(square_rank(s1) - square_rank(s2));
422 inline int square_distance(Square s1, Square s2) {
423 return Max(file_distance(s1, s2), rank_distance(s1, s2));
426 inline File file_from_char(char c) {
427 return File(c - 'a') + FILE_A;
430 inline char file_to_char(File f) {
431 return char(f - FILE_A + int('a'));
434 inline Rank rank_from_char(char c) {
435 return Rank(c - '1') + RANK_1;
438 inline char rank_to_char(Rank r) {
439 return char(r - RANK_1 + int('1'));
442 inline const std::string square_to_string(Square s) {
443 char ch[] = { file_to_char(square_file(s)), rank_to_char(square_rank(s)), 0 };
444 return std::string(ch);
447 inline bool file_is_ok(File f) {
448 return f >= FILE_A && f <= FILE_H;
451 inline bool rank_is_ok(Rank r) {
452 return r >= RANK_1 && r <= RANK_8;
455 inline bool square_is_ok(Square s) {
456 return s >= SQ_A1 && s <= SQ_H8;
459 #endif // !defined(TYPES_H_INCLUDED)