X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbitboard.h;h=f41abeb28c0013ece24cb98a08dd700c1fd0a98c;hp=390966e3494273969bdb53a50c6953a6c9782611;hb=e0504ab876a997321102f040ab88203cb893db12;hpb=5e4cd3fc0d4b88eeb09ae458b9cb9f73db8c4ae7

diff --git a/src/bitboard.h b/src/bitboard.h
index 390966e3..f41abeb2 100644
--- 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;
 }
 
@@ -291,7 +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)