Eliminate ONE_PLY

[stockfish] / src / types.h

diff --git a/src/types.h b/src/types.h
index c4c2752c8e553961a2fbc70140ee7dea4523e22f..cc4008b3e72702fd9220a3dfd5e3fd34d7dee562 100644 (file)
--- a/src/types.h
+++ b/src/types.h
@@ -43,6 +43,7 @@
 #include <climits>
 #include <cstdint>
 #include <cstdlib>
+#include <algorithm>
 
 #if defined(_MSC_VER)
 // Disable some silly and noisy warning from MSVC compiler
@@ -101,7 +102,7 @@ typedef uint64_t Key;
 typedef uint64_t Bitboard;
 
 constexpr int MAX_MOVES = 256;
-constexpr int MAX_PLY   = 128;
+constexpr int MAX_PLY   = 246;
 
 /// A move needs 16 bits to be stored
 ///
@@ -131,17 +132,19 @@ enum Color {
   WHITE, BLACK, COLOR_NB = 2
 };
 
-enum CastlingSide {
-  KING_SIDE, QUEEN_SIDE, CASTLING_SIDE_NB = 2
-};
-
-enum CastlingRight {
+enum CastlingRights {
   NO_CASTLING,
   WHITE_OO,
   WHITE_OOO = WHITE_OO << 1,
   BLACK_OO  = WHITE_OO << 2,
   BLACK_OOO = WHITE_OO << 3,
-  ANY_CASTLING = WHITE_OO | WHITE_OOO | BLACK_OO | BLACK_OOO,
+
+  KING_SIDE      = WHITE_OO  | BLACK_OO,
+  QUEEN_SIDE     = WHITE_OOO | BLACK_OOO,
+  WHITE_CASTLING = WHITE_OO  | WHITE_OOO,
+  BLACK_CASTLING = BLACK_OO  | BLACK_OOO,
+  ANY_CASTLING   = WHITE_CASTLING | BLACK_CASTLING,
+
   CASTLING_RIGHT_NB = 16
 };
 
@@ -176,7 +179,7 @@ enum Value : int {
   VALUE_MATE_IN_MAX_PLY  =  VALUE_MATE - 2 * MAX_PLY,
   VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + 2 * MAX_PLY,
 
-  PawnValueMg   = 136,   PawnValueEg   = 208,
+  PawnValueMg   = 128,   PawnValueEg   = 213,
   KnightValueMg = 782,   KnightValueEg = 865,
   BishopValueMg = 830,   BishopValueEg = 918,
   RookValueMg   = 1289,  RookValueEg   = 1378,
@@ -200,21 +203,18 @@ enum Piece {
 
 extern Value PieceValue[PHASE_NB][PIECE_NB];
 
-enum Depth : int {
+typedef int Depth;
 
-  ONE_PLY = 1,
+enum : int {
 
-  DEPTH_ZERO          =  0 * ONE_PLY,
-  DEPTH_QS_CHECKS     =  0 * ONE_PLY,
-  DEPTH_QS_NO_CHECKS  = -1 * ONE_PLY,
-  DEPTH_QS_RECAPTURES = -5 * ONE_PLY,
+  DEPTH_QS_CHECKS     =  0,
+  DEPTH_QS_NO_CHECKS  = -1,
+  DEPTH_QS_RECAPTURES = -5,
 
-  DEPTH_NONE = -6 * ONE_PLY,
-  DEPTH_MAX  = MAX_PLY * ONE_PLY
+  DEPTH_NONE   = -6,
+  DEPTH_OFFSET = DEPTH_NONE,
 };
 
-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,
@@ -286,7 +286,6 @@ inline T& operator--(T& d) { return d = T(int(d) - 1); }
 
 #define ENABLE_FULL_OPERATORS_ON(T)                                \
 ENABLE_BASE_OPERATORS_ON(T)                                        \
-ENABLE_INCR_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); }        \
@@ -295,12 +294,10 @@ 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(Color)
 ENABLE_INCR_OPERATORS_ON(Square)
 ENABLE_INCR_OPERATORS_ON(File)
 ENABLE_INCR_OPERATORS_ON(Rank)
@@ -344,6 +341,11 @@ inline Score operator*(Score s, int i) {
   return result;
 }
 
+/// Multiplication of a Score by an boolean
+inline Score operator*(Score s, bool b) {
+  return Score(int(s) * int(b));
+}
+
 constexpr Color operator~(Color c) {
   return Color(c ^ BLACK); // Toggle color
 }
@@ -352,16 +354,16 @@ constexpr Square operator~(Square s) {
   return Square(s ^ SQ_A8); // Vertical flip SQ_A1 -> SQ_A8
 }
 
-constexpr File operator~(File f) {
-  return File(f ^ FILE_H); // Horizontal flip FILE_A -> FILE_H
-}
-
 constexpr Piece operator~(Piece pc) {
   return Piece(pc ^ 8); // Swap color of piece B_KNIGHT -> W_KNIGHT
 }
 
-constexpr CastlingRight operator|(Color c, CastlingSide s) {
-  return CastlingRight(WHITE_OO << ((s == QUEEN_SIDE) + 2 * c));
+inline File map_to_queenside(File f) {
+  return std::min(f, File(FILE_H - f)); // Map files ABCDEFGH to files ABCDDCBA
+}
+
+constexpr CastlingRights operator&(Color c, CastlingRights cr) {
+  return CastlingRights((c == WHITE ? WHITE_CASTLING : BLACK_CASTLING) & cr);
 }
 
 constexpr Value mate_in(int ply) {
@@ -441,6 +443,10 @@ constexpr Move make_move(Square from, Square to) {
   return Move((from << 6) + to);
 }
 
+constexpr Move reverse_move(Move m) {
+  return make_move(to_sq(m), from_sq(m));
+}
+
 template<MoveType T>
 constexpr Move make(Square from, Square to, PieceType pt = KNIGHT) {
   return Move(T + ((pt - KNIGHT) << 12) + (from << 6) + to);