Remove HistoryStats

[stockfish] / src / bitboard.h

diff --git a/src/bitboard.h b/src/bitboard.h
index a0f7ea8d69b0bfe325f4ceb060d0a91f49055210..f41abeb28c0013ece24cb98a08dd700c1fd0a98c 100644 (file)
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -124,13 +124,13 @@ inline Bitboard file_bb(Square s) {
 }
 
 
-/// shift_bb() moves a bitboard one step along direction Delta. Mainly for pawns
+/// shift() moves a bitboard one step along direction D. Mainly for pawns
 
-template<Square Delta>
-inline Bitboard shift_bb(Bitboard b) {
-  return  Delta == DELTA_N  ?  b             << 8 : Delta == DELTA_S  ?  b             >> 8
-        : Delta == DELTA_NE ? (b & ~FileHBB) << 9 : Delta == DELTA_SE ? (b & ~FileHBB) >> 7
-        : Delta == DELTA_NW ? (b & ~FileABB) << 7 : Delta == DELTA_SW ? (b & ~FileABB) >> 9
+template<Square D>
+inline Bitboard shift(Bitboard b) {
+  return  D == NORTH      ?  b             << 8 : D == SOUTH      ?  b             >> 8
+        : D == NORTH_EAST ? (b & ~FileHBB) << 9 : D == SOUTH_EAST ? (b & ~FileHBB) >> 7
+        : D == NORTH_WEST ? (b & ~FileABB) << 7 : D == SOUTH_WEST ? (b & ~FileABB) >> 9
         : 0;
 }
 
@@ -272,10 +272,6 @@ inline int popcount(Bitboard b) {
 
   return (int)_mm_popcnt_u64(b);
 
-#elif defined(_MSC_VER)
-
-  return (int)__popcnt64(b);
-
 #else // Assumed gcc or compatible compiler
 
   return __builtin_popcountll(b);
@@ -295,7 +291,7 @@ inline Square lsb(Bitboard b) {
 
 inline Square msb(Bitboard b) {
   assert(b);
-  return Square(63 - __builtin_clzll(b));
+  return Square(63 ^ __builtin_clzll(b));
 }
 
 #elif defined(_WIN64) && defined(_MSC_VER)