X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbitboard.h;h=cf948afc7c9398f4b63aa56d79409d34acc7f89c;hp=c9f724277a6f5d5efabc82d0958396741a6aa35e;hb=2e21aba8d937bdf5eb0eedeac99ac2c2553e9d0d;hpb=9afa1d73306cb98e95acec5daf4efd65e592ceff

diff --git a/src/bitboard.h b/src/bitboard.h
index c9f72427..cf948afc 100644
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -161,6 +161,16 @@ constexpr Bitboard shift(Bitboard b) {
 }
 
 
+/// pawn_attacks_bb() returns the pawn attacks for the given color from the
+/// squares in the given bitboard.
+
+template<Color C>
+constexpr Bitboard pawn_attacks_bb(Bitboard b) {
+  return C == WHITE ? shift<NORTH_WEST>(b) | shift<NORTH_EAST>(b)
+                    : shift<SOUTH_WEST>(b) | shift<SOUTH_EAST>(b);
+}
+
+
 /// adjacent_files_bb() returns a bitboard representing all the squares on the
 /// adjacent files of the given one.
 
@@ -179,9 +189,9 @@ inline Bitboard between_bb(Square s1, Square s2) {
 }
 
 
-/// forward_ranks_bb() returns a bitboard representing all the squares on all the ranks
-/// in front of the given one, from the point of view of the given color. For
-/// instance, forward_ranks_bb(BLACK, SQ_D3) will return the 16 squares on ranks 1 and 2.
+/// forward_ranks_bb() returns a bitboard representing the squares on all the ranks
+/// in front of the given one, from the point of view of the given color. For instance,
+/// forward_ranks_bb(BLACK, SQ_D3) will return the 16 squares on ranks 1 and 2.
 
 inline Bitboard forward_ranks_bb(Color c, Square s) {
   return ForwardRanksBB[c][rank_of(s)];