X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=src%2Fbitboard.cpp;h=9bd16d2f66a96e60be496258ea550fc6bcb6277a;hb=cb506d3b1657c03738f823a98faed3c6b5216c40;hp=4a7a0af241c53939622aad53b267e2085d8108ba;hpb=5d79af9e0d466572217dc47f5c307f6fd382a646;p=stockfish

diff --git a/src/bitboard.cpp b/src/bitboard.cpp
index 4a7a0af2..9bd16d2f 100644
--- a/src/bitboard.cpp
+++ b/src/bitboard.cpp
@@ -163,6 +163,53 @@ const int RShift[64] = {
 
 #endif // defined(IS_64BIT)
 
+const Bitboard SquaresByColorBB[2] = { BlackSquaresBB, WhiteSquaresBB };
+
+const Bitboard FileBB[8] = {
+  FileABB, FileBBB, FileCBB, FileDBB, FileEBB, FileFBB, FileGBB, FileHBB
+};
+
+const Bitboard NeighboringFilesBB[8] = {
+  FileBBB, FileABB|FileCBB, FileBBB|FileDBB, FileCBB|FileEBB,
+  FileDBB|FileFBB, FileEBB|FileGBB, FileFBB|FileHBB, FileGBB
+};
+
+const Bitboard ThisAndNeighboringFilesBB[8] = {
+  FileABB|FileBBB, FileABB|FileBBB|FileCBB,
+  FileBBB|FileCBB|FileDBB, FileCBB|FileDBB|FileEBB,
+  FileDBB|FileEBB|FileFBB, FileEBB|FileFBB|FileGBB,
+  FileFBB|FileGBB|FileHBB, FileGBB|FileHBB
+};
+
+const Bitboard RankBB[8] = {
+  Rank1BB, Rank2BB, Rank3BB, Rank4BB, Rank5BB, Rank6BB, Rank7BB, Rank8BB
+};
+
+const Bitboard RelativeRankBB[2][8] = {
+  { Rank1BB, Rank2BB, Rank3BB, Rank4BB, Rank5BB, Rank6BB, Rank7BB, Rank8BB },
+  { Rank8BB, Rank7BB, Rank6BB, Rank5BB, Rank4BB, Rank3BB, Rank2BB, Rank1BB }
+};
+
+const Bitboard InFrontBB[2][8] = {
+  { Rank2BB | Rank3BB | Rank4BB | Rank5BB | Rank6BB | Rank7BB | Rank8BB,
+    Rank3BB | Rank4BB | Rank5BB | Rank6BB | Rank7BB | Rank8BB,
+    Rank4BB | Rank5BB | Rank6BB | Rank7BB | Rank8BB,
+    Rank5BB | Rank6BB | Rank7BB | Rank8BB,
+    Rank6BB | Rank7BB | Rank8BB,
+    Rank7BB | Rank8BB,
+    Rank8BB,
+    EmptyBoardBB
+  },
+  { EmptyBoardBB,
+    Rank1BB,
+    Rank2BB | Rank1BB,
+    Rank3BB | Rank2BB | Rank1BB,
+    Rank4BB | Rank3BB | Rank2BB | Rank1BB,
+    Rank5BB | Rank4BB | Rank3BB | Rank2BB | Rank1BB,
+    Rank6BB | Rank5BB | Rank4BB | Rank3BB | Rank2BB | Rank1BB,
+    Rank7BB | Rank6BB | Rank5BB | Rank4BB | Rank3BB | Rank2BB | Rank1BB
+  }
+};
 
 Bitboard RMask[64];
 int RAttackIndex[64];
@@ -186,6 +233,8 @@ Bitboard BishopPseudoAttacks[64];
 Bitboard RookPseudoAttacks[64];
 Bitboard QueenPseudoAttacks[64];
 
+uint8_t BitCount8Bit[256];
+
 
 ////
 //// Local definitions
@@ -335,6 +384,9 @@ namespace {
           in_front_bb(c, s) & this_and_neighboring_files_bb(s);
         OutpostMask[c][s] = in_front_bb(c, s) & neighboring_files_bb(s);
       }
+
+    for (Bitboard b = 0ULL; b < 256ULL; b++)
+        BitCount8Bit[b] = (uint8_t)count_1s(b);
   }