/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2008-2012 Marco Costalba, Joona Kiiski, 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
#if !defined(TYPES_H_INCLUDED)
#define TYPES_H_INCLUDED
+/// For Linux and OSX configuration is done automatically using Makefile. To get
+/// started type 'make help'.
+///
+/// For Windows, part of the configuration is detected automatically, but some
+/// switches need to be set manually:
+///
+/// -DNDEBUG | Disable debugging mode. Use always.
+///
+/// -DNO_PREFETCH | Disable use of prefetch asm-instruction. A must if you want
+/// | the executable 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.
+
#include <climits>
#include <cstdlib>
#if defined(_MSC_VER)
// Disable some silly and noisy warning from MSVC compiler
-#pragma warning(disable: 4800) // Forcing value to bool 'true' or 'false'
#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 __int64 uint64_t;
#else
-
-#include <inttypes.h>
-
-#endif
-
-////
-//// Configuration
-////
-
-//// For Linux and OSX configuration is done automatically using Makefile.
-//// To get started type "make help".
-////
-//// For windows part of the configuration is detected automatically, but
-//// some switches need to be set manually:
-////
-//// -DNDEBUG | Disable debugging mode. Use always.
-////
-//// -DNO_PREFETCH | Disable use of prefetch asm-instruction. A must if you want the
-//// | executable 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. Around 4% speed-up.
-////
-//// -DOLD_LOCKS | By default under Windows are used the fast Slim Reader/Writer (SRW)
-//// | Locks and Condition Variables: these are not supported by Windows XP
-//// | and older, to compile for those platforms you should enable OLD_LOCKS.
-
-// Automatic detection for 64-bit under Windows
-#if defined(_WIN64)
-#define IS_64BIT
+# include <inttypes.h>
#endif
-// Automatic detection for use of bsfq asm-instruction under Windows
#if defined(_WIN64)
-#define USE_BSFQ
+# include <intrin.h> // MSVC popcnt and bsfq instrinsics
+# define IS_64BIT
+# define USE_BSFQ
#endif
-// Intel header for _mm_popcnt_u64() intrinsic
#if defined(USE_POPCNT) && defined(_MSC_VER) && defined(__INTEL_COMPILER)
-#include <nmmintrin.h>
+# include <nmmintrin.h> // Intel header for _mm_popcnt_u64() intrinsic
#endif
-// Cache line alignment specification
#if defined(_MSC_VER) || defined(__INTEL_COMPILER)
-#define CACHE_LINE_ALIGNMENT __declspec(align(64))
-#else
-#define CACHE_LINE_ALIGNMENT __attribute__ ((aligned(64)))
-#endif
-
-// Define a __cpuid() function for gcc compilers, for Intel and MSVC
-// is already available as an intrinsic.
-#if defined(_MSC_VER)
-#include <intrin.h>
-#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
-inline void __cpuid(int CPUInfo[4], int InfoType)
-{
- int* eax = CPUInfo + 0;
- int* ebx = CPUInfo + 1;
- int* ecx = CPUInfo + 2;
- int* edx = CPUInfo + 3;
-
- *eax = InfoType;
- *ecx = 0;
- __asm__("cpuid" : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx)
- : "0" (*eax), "2" (*ecx));
-}
+# define CACHE_LINE_ALIGNMENT __declspec(align(64))
#else
-inline void __cpuid(int CPUInfo[4], int)
-{
- CPUInfo[0] = CPUInfo[1] = CPUInfo[2] = CPUInfo[3] = 0;
-}
+# define CACHE_LINE_ALIGNMENT __attribute__ ((aligned(64)))
#endif
-// Define FORCE_INLINE macro to force inlining overriding compiler choice
#if defined(_MSC_VER)
-#define FORCE_INLINE __forceinline
+# define FORCE_INLINE __forceinline
#elif defined(__GNUC__)
-#define FORCE_INLINE inline __attribute__((always_inline))
+# define FORCE_INLINE inline __attribute__((always_inline))
#else
-#define FORCE_INLINE inline
+# define FORCE_INLINE inline
#endif
-/// cpu_has_popcnt() detects support for popcnt instruction at runtime
-inline bool cpu_has_popcnt() {
-
- int CPUInfo[4] = {-1};
- __cpuid(CPUInfo, 0x00000001);
- return (CPUInfo[2] >> 23) & 1;
-}
-
-/// CpuHasPOPCNT is a global constant initialized at startup that
-/// is set to true if CPU on which application runs supports popcnt
-/// hardware instruction. Unless USE_POPCNT is not defined.
#if defined(USE_POPCNT)
-const bool CpuHasPOPCNT = cpu_has_popcnt();
+const bool HasPopCnt = true;
#else
-const bool CpuHasPOPCNT = false;
+const bool HasPopCnt = false;
#endif
-
-/// CpuIs64Bit is a global constant initialized at compile time that
-/// is set to true if CPU on which application runs is a 64 bits.
#if defined(IS_64BIT)
-const bool CpuIs64Bit = true;
+const bool Is64Bit = true;
#else
-const bool CpuIs64Bit = false;
+const bool Is64Bit = false;
#endif
-#include <string>
-
typedef uint64_t Key;
typedef uint64_t Bitboard;
-const int MAX_MOVES = 256;
-const int PLY_MAX = 100;
-const int PLY_MAX_PLUS_2 = PLY_MAX + 2;
+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 Rank7BB = Rank1BB << (8 * 6);
const Bitboard Rank8BB = Rank1BB << (8 * 7);
+
/// A move needs 16 bits to be stored
///
/// bit 0- 5: destination square (from 0 to 63)
return f.score < s.score;
}
-enum ValueType {
- VALUE_TYPE_NONE = 0,
- VALUE_TYPE_UPPER = 1,
- VALUE_TYPE_LOWER = 2,
- VALUE_TYPE_EXACT = VALUE_TYPE_UPPER | VALUE_TYPE_LOWER
+enum CastleRight {
+ CASTLES_NONE = 0,
+ WHITE_OO = 1,
+ BLACK_OO = 2,
+ WHITE_OOO = 4,
+ BLACK_OOO = 8,
+ ALL_CASTLES = 15
+};
+
+enum ScaleFactor {
+ 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_EXACT = BOUND_UPPER | BOUND_LOWER
};
enum Value {
VALUE_INFINITE = 30001,
VALUE_NONE = 30002,
- VALUE_MATE_IN_PLY_MAX = VALUE_MATE - PLY_MAX,
- VALUE_MATED_IN_PLY_MAX = -VALUE_MATE + PLY_MAX,
+ VALUE_MATE_IN_MAX_PLY = VALUE_MATE - MAX_PLY,
+ VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + MAX_PLY,
VALUE_ENSURE_INTEGER_SIZE_P = INT_MAX,
VALUE_ENSURE_INTEGER_SIZE_N = INT_MIN
};
enum PieceType {
- PIECE_TYPE_NONE = 0,
+ NO_PIECE_TYPE = 0,
PAWN = 1, KNIGHT = 2, BISHOP = 3, ROOK = 4, QUEEN = 5, KING = 6
};
enum Piece {
- PIECE_NONE_DARK_SQ = 0, WP = 1, WN = 2, WB = 3, WR = 4, WQ = 5, WK = 6,
- BP = 9, BN = 10, BB = 11, BR = 12, BQ = 13, BK = 14, PIECE_NONE = 16
+ 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
};
enum Color {
- WHITE, BLACK, COLOR_NONE
+ WHITE, BLACK, NO_COLOR
};
enum Depth {
DEPTH_ZERO = 0 * ONE_PLY,
DEPTH_QS_CHECKS = -1 * ONE_PLY,
DEPTH_QS_NO_CHECKS = -2 * ONE_PLY,
- DEPTH_QS_RECAPTURES = -4 * ONE_PLY,
+ DEPTH_QS_RECAPTURES = -5 * ONE_PLY,
DEPTH_NONE = -127 * ONE_PLY
};
RANK_1, RANK_2, RANK_3, RANK_4, RANK_5, RANK_6, RANK_7, RANK_8
};
-enum SquareColor {
- DARK, LIGHT
-};
-enum ScaleFactor {
- SCALE_FACTOR_DRAW = 0,
- SCALE_FACTOR_NORMAL = 64,
- SCALE_FACTOR_MAX = 128,
- SCALE_FACTOR_NONE = 255
+/// 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 CastleRight {
- CASTLES_NONE = 0,
- WHITE_OO = 1,
- BLACK_OO = 2,
- WHITE_OOO = 4,
- BLACK_OOO = 8,
- ALL_CASTLES = 15
-};
+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); }
-/// 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
-};
+/// 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))
+
+inline Value eg_value(Score s) { return Value(int16_t(s & 0xffff)); }
-#define ENABLE_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, int i) { return T(int(d) / i); } \
-inline T operator- (const T d) { return T(-int(d)); } \
-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+= (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; } \
-inline T& operator/= (T& d, int i) { d = T(int(d) / i); return d; }
+#else
+
+inline Value eg_value(Score s) {
+ return Value((int)(unsigned(s) & 0x7fffu) - (int)(unsigned(s) & 0x8000u));
+}
+
+#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(File)
ENABLE_OPERATORS_ON(Rank)
-#undef ENABLE_OPERATORS_ON
-
-// Extra 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); }
+/// 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); }
-// 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); }
-
-// Unfortunatly on Intel 64 bit we have a small speed regression, so use a faster code in
-// this case, although not 100% standard compliant it seems to work for Intel and MSVC.
-#if defined(IS_64BIT) && (!defined(__GNUC__) || defined(__INTEL_COMPILER))
-inline Value eg_value(Score s) { return Value(int16_t(s & 0xffff)); }
-#else
-inline Value eg_value(Score s) { return Value((int)(unsigned(s) & 0x7fffu) - (int)(unsigned(s) & 0x8000u)); }
-#endif
-
-inline Score make_score(int mg, int eg) { return Score((mg << 16) + eg); }
+ENABLE_SAFE_OPERATORS_ON(Score)
-// Division 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); }
-
-// 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.
+/// 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);
-// Remaining Score operators are standard
-inline Score operator+ (const Score d1, const Score d2) { return Score(int(d1) + int(d2)); }
-inline Score operator- (const Score d1, const Score d2) { return Score(int(d1) - int(d2)); }
-inline Score operator* (int i, const Score d) { return Score(i * int(d)); }
-inline Score operator* (const Score d, int i) { return Score(int(d) * i); }
-inline Score operator- (const Score d) { return Score(-int(d)); }
-inline void operator+= (Score& d1, const Score d2) { d1 = d1 + d2; }
-inline void operator-= (Score& d1, const Score d2) { d1 = d1 - d2; }
-inline void operator*= (Score& d, int i) { d = Score(int(d) * i); }
-inline void operator/= (Score& d, int i) { d = Score(int(d) / i); }
+/// 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 QueenValueMidgame = Value(0x9D9);
const Value QueenValueEndgame = Value(0x9FE);
-extern const Value PieceValueMidgame[17];
+extern const Value PieceValueMidgame[17]; // Indexed by Piece or PieceType
extern const Value PieceValueEndgame[17];
extern int SquareDistance[64][64];
+extern uint8_t BitCount8Bit[256];
+
+inline Color operator~(Color c) {
+ return Color(c ^ 1);
+}
-inline Value value_mate_in(int ply) {
+inline Square operator~(Square s) {
+ return Square(s ^ 56);
+}
+
+inline Value mate_in(int ply) {
return VALUE_MATE - ply;
}
-inline Value value_mated_in(int ply) {
+inline Value mated_in(int ply) {
return -VALUE_MATE + ply;
}
return Color(p >> 3);
}
-inline Color flip(Color c) {
- return Color(c ^ 1);
-}
-
inline Square make_square(File f, Rank r) {
return Square((r << 3) | f);
}
return Rank(s >> 3);
}
-inline Square flip(Square s) {
- return Square(s ^ 56);
-}
-
inline Square mirror(Square s) {
return Square(s ^ 7);
}
return relative_rank(c, rank_of(s));
}
-inline SquareColor color_of(Square s) {
- return SquareColor(int(rank_of(s) + s) & 1);
-}
-
inline bool opposite_colors(Square s1, Square s2) {
int s = s1 ^ s2;
return ((s >> 3) ^ s) & 1;
return char(r - RANK_1 + int('1'));
}
-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;
-}
-
inline Square pawn_push(Color c) {
return c == WHITE ? DELTA_N : DELTA_S;
}
-// An helper insertion sort implementation, works with pointers and iterators
-template<typename T, typename K>
-inline void sort(K firstMove, K lastMove)
-{
- T value;
- K cur, p, d;
-
- if (firstMove != lastMove)
- for (cur = firstMove + 1; cur != lastMove; cur++)
- {
- p = d = cur;
- value = *p--;
- if (*p < value)
- {
- do *d = *p;
- while (--d != firstMove && *--p < value);
- *d = value;
- }
- }
-}
-
-inline Square move_from(Move m) {
+inline Square from_sq(Move m) {
return Square((m >> 6) & 0x3F);
}
-inline Square move_to(Move m) {
+inline Square to_sq(Move m) {
return Square(m & 0x3F);
}
return Move(to | (from << 6));
}
-inline Move make_promotion_move(Square from, Square to, PieceType promotion) {
- return Move(to | (from << 6) | (1 << 14) | ((promotion - 2) << 12)) ;
+inline Move make_promotion(Square from, Square to, PieceType pt) {
+ return Move(to | (from << 6) | (1 << 14) | ((pt - 2) << 12)) ;
}
-inline Move make_enpassant_move(Square from, Square to) {
+inline Move make_enpassant(Square from, Square to) {
return Move(to | (from << 6) | (2 << 14));
}
-inline Move make_castle_move(Square from, Square to) {
+inline Move make_castle(Square from, Square to) {
return Move(to | (from << 6) | (3 << 14));
}
inline bool is_ok(Move m) {
- return move_from(m) != move_to(m); // Catches also MOVE_NULL and MOVE_NONE
+ 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;
+}
+
+/// 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;
+ }
}
#endif // !defined(TYPES_H_INCLUDED)