X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbitboard.cpp;h=105d201f1c17de3ca2cfc9a1cad5a2d9aab4efd7;hp=398c6bf77858a5bfb79635ba732a1952b54896bf;hb=8df1cd10df0869f05916d1eb19e33b66127fcb86;hpb=cf5d683408a2ef8a1c80be9bf7d6790a38b16277

diff --git a/src/bitboard.cpp b/src/bitboard.cpp
index 398c6bf7..105d201f 100644
--- a/src/bitboard.cpp
+++ b/src/bitboard.cpp
@@ -24,12 +24,11 @@
 #include "misc.h"
 
 uint8_t PopCnt16[1 << 16];
-int SquareDistance[SQUARE_NB][SQUARE_NB];
+int8_t SquareDistance[SQUARE_NB][SQUARE_NB];
 
 Bitboard SquareBB[SQUARE_NB];
 Bitboard FileBB[FILE_NB];
 Bitboard RankBB[RANK_NB];
-Bitboard AdjacentFilesBB[FILE_NB];
 Bitboard ForwardRanksBB[COLOR_NB][RANK_NB];
 Bitboard BetweenBB[SQUARE_NB][SQUARE_NB];
 Bitboard LineBB[SQUARE_NB][SQUARE_NB];
@@ -97,9 +96,6 @@ void Bitboards::init() {
   for (Rank r = RANK_1; r <= RANK_8; ++r)
       RankBB[r] = r > RANK_1 ? RankBB[r - 1] << 8 : Rank1BB;
 
-  for (File f = FILE_A; f <= FILE_H; ++f)
-      AdjacentFilesBB[f] = (f > FILE_A ? FileBB[f - 1] : 0) | (f < FILE_H ? FileBB[f + 1] : 0);
-
   for (Rank r = RANK_1; r < RANK_8; ++r)
       ForwardRanksBB[WHITE][r] = ~(ForwardRanksBB[BLACK][r + 1] = ForwardRanksBB[BLACK][r] | RankBB[r]);
 
@@ -107,7 +103,7 @@ void Bitboards::init() {
       for (Square s = SQ_A1; s <= SQ_H8; ++s)
       {
           ForwardFileBB [c][s] = ForwardRanksBB[c][rank_of(s)] & FileBB[file_of(s)];
-          PawnAttackSpan[c][s] = ForwardRanksBB[c][rank_of(s)] & AdjacentFilesBB[file_of(s)];
+          PawnAttackSpan[c][s] = ForwardRanksBB[c][rank_of(s)] & adjacent_files_bb(file_of(s));
           PassedPawnMask[c][s] = ForwardFileBB [c][s] | PawnAttackSpan[c][s];
       }
 
@@ -184,8 +180,8 @@ namespace {
 
   // init_magics() computes all rook and bishop attacks at startup. Magic
   // bitboards are used to look up attacks of sliding pieces. As a reference see
-  // chessprogramming.wikispaces.com/Magic+Bitboards. In particular, here we
-  // use the so called "fancy" approach.
+  // www.chessprogramming.org/Magic_Bitboards. In particular, here we use the so
+  // called "fancy" approach.
 
   void init_magics(Bitboard table[], Magic magics[], Direction directions[]) {