Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2015-2016 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
///
/// -DUSE_POPCNT | Add runtime support for use of popcnt asm-instruction. Works
/// | 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>
-#include "platform.h"
+#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'
+#endif
/// Predefined macros hell:
///
/// _WIN32 Building on Windows (any)
/// _WIN64 Building on Windows 64 bit
-#if defined(_WIN64) && !defined(IS_64BIT) // Last condition means Makefile is not used
+#if defined(_WIN64) && defined(_MSC_VER) // No Makefile used
# include <intrin.h> // MSVC popcnt and bsfq instrinsics
# define IS_64BIT
-# define USE_BSFQ
#endif
#if defined(USE_POPCNT) && defined(__INTEL_COMPILER) && defined(_MSC_VER)
#if defined(USE_PEXT)
# include <immintrin.h> // Header for _pext_u64() intrinsic
+# define pext(b, m) _pext_u64(b, m)
#else
-# define _pext_u64(b, m) (0)
-#endif
-
-#ifdef _MSC_VER
-# define FORCE_INLINE __forceinline
-#elif defined(__GNUC__)
-# define FORCE_INLINE inline __attribute__((always_inline))
-#else
-# define FORCE_INLINE inline
+# define pext(b, m) (0)
#endif
#ifdef USE_POPCNT
BOUND_EXACT = BOUND_UPPER | BOUND_LOWER
};
-enum Value {
+enum Value : int {
VALUE_ZERO = 0,
VALUE_DRAW = 0,
VALUE_KNOWN_WIN = 10000,
VALUE_MATE_IN_MAX_PLY = VALUE_MATE - 2 * MAX_PLY,
VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + 2 * MAX_PLY,
- VALUE_ENSURE_INTEGER_SIZE_P = INT_MAX,
- VALUE_ENSURE_INTEGER_SIZE_N = INT_MIN,
-
PawnValueMg = 198, PawnValueEg = 258,
- KnightValueMg = 817, KnightValueEg = 846,
- BishopValueMg = 836, BishopValueEg = 857,
- RookValueMg = 1270, RookValueEg = 1278,
- QueenValueMg = 2521, QueenValueEg = 2558,
+ KnightValueMg = 817, KnightValueEg = 896,
+ BishopValueMg = 836, BishopValueEg = 907,
+ RookValueMg = 1270, RookValueEg = 1356,
+ QueenValueMg = 2521, QueenValueEg = 2658,
MidgameLimit = 15581, EndgameLimit = 3998
};
};
-/// Score enum stores a middlegame and an endgame value in a single integer.
-/// The least significant 16 bits are used to store the endgame value and
-/// the upper 16 bits are used to store the middlegame value. The compiler
-/// is free to choose the enum type as long as it can store the data, so we
-/// ensure that Score is an integer type by assigning some big int values.
-enum Score {
- SCORE_ZERO,
- SCORE_ENSURE_INTEGER_SIZE_P = INT_MAX,
- SCORE_ENSURE_INTEGER_SIZE_N = INT_MIN
-};
+/// Score enum stores a middlegame and an endgame value in a single integer
+/// (enum). The least significant 16 bits are used to store the endgame value
+/// and the upper 16 bits are used to store the middlegame value.
+enum Score : int { SCORE_ZERO };
inline Score make_score(int mg, int eg) {
return Score((mg << 16) + eg);
/// 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 + 0x8000) & ~0xFFFF) / 0x10000);
+
+ union { uint16_t u; int16_t s; } mg = { uint16_t(unsigned(s + 0x8000) >> 16) };
+ return Value(mg.s);
}
inline Value eg_value(Score s) {
- return Value((int)(unsigned(s) & 0x7FFFU) - (int)(unsigned(s) & 0x8000U));
+
+ union { uint16_t u; int16_t s; } eg = { uint16_t(unsigned(s)) };
+ return Value(eg.s);
}
#define ENABLE_BASE_OPERATORS_ON(T) \
return Piece((c << 3) | pt);
}
-inline PieceType type_of(Piece pc) {
+inline PieceType type_of(Piece pc) {
return PieceType(pc & 7);
}
}
inline PieceType promotion_type(Move m) {
- return PieceType(((m >> 12) & 3) + 2);
+ return PieceType(((m >> 12) & 3) + KNIGHT);
}
inline Move make_move(Square from, Square to) {