Small speed-up in BetweenBB

[stockfish] / src / psqt.cpp

diff --git a/src/psqt.cpp b/src/psqt.cpp
index 60d17ad29e55c2366640d4f2aa786f567bce3a54..f6f5933cb250ab394e2030cdc6fb35954bc3ac45 100644 (file)
--- a/src/psqt.cpp
+++ b/src/psqt.cpp
@@ -2,7 +2,7 @@
   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) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+  Copyright (C) 2015-2020 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
@@ -22,11 +22,6 @@
 
 #include "types.h"
 
-Value PieceValue[PHASE_NB][PIECE_NB] = {
-  { VALUE_ZERO, PawnValueMg, KnightValueMg, BishopValueMg, RookValueMg, QueenValueMg },
-  { VALUE_ZERO, PawnValueEg, KnightValueEg, BishopValueEg, RookValueEg, QueenValueEg }
-};
-
 namespace PSQT {
 
 #define S(mg, eg) make_score(mg, eg)
@@ -79,8 +74,8 @@ constexpr Score Bonus[][RANK_NB][int(FILE_NB) / 2] = {
    { S(-2,-75), S(-2,-52), S( 1,-43), S(-2,-36) }
   },
   { // King
-   { S(271,  1), S(327, 45), S(270, 85), S(192, 76) },
-   { S(278, 53), S(303,100), S(230,133), S(174,135) },
+   { S(271,  1), S(327, 45), S(271, 85), S(198, 76) },
+   { S(278, 53), S(303,100), S(234,133), S(179,135) },
    { S(195, 88), S(258,130), S(169,169), S(120,175) },
    { S(164,103), S(190,156), S(138,172), S( 98,172) },
    { S(154, 96), S(179,166), S(105,199), S( 70,199) },
@@ -112,9 +107,6 @@ void init() {
 
   for (Piece pc = W_PAWN; pc <= W_KING; ++pc)
   {
-      PieceValue[MG][~pc] = PieceValue[MG][pc];
-      PieceValue[EG][~pc] = PieceValue[EG][pc];
-
       Score score = make_score(PieceValue[MG][pc], PieceValue[EG][pc]);
 
       for (Square s = SQ_A1; s <= SQ_H8; ++s)
@@ -122,7 +114,7 @@ void init() {
           File f = map_to_queenside(file_of(s));
           psq[ pc][ s] = score + (type_of(pc) == PAWN ? PBonus[rank_of(s)][file_of(s)]
                                                       : Bonus[pc][rank_of(s)][f]);
-          psq[~pc][~s] = -psq[pc][s];
+          psq[~pc][flip_rank(s)] = -psq[pc][s];
       }
   }
 }