Implement PEXT based attacks

[stockfish] / src / bitboard.h

diff --git a/src/bitboard.h b/src/bitboard.h
index 140867fa94a466272d55be020451b0eb8b012f77..cd6c280c8c444d9e349c1895b4c792ef8325d77d 100644 (file)
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -243,6 +243,9 @@ FORCE_INLINE unsigned magic_index(Square s, Bitboard occ) {
   Bitboard* const Magics = Pt == ROOK ? RMagics : BMagics;
   unsigned* const Shifts = Pt == ROOK ? RShifts : BShifts;
 
+  if (HasPext)
+      return unsigned(pext(occ, Masks[s]));
+
   if (Is64Bit)
       return unsigned(((occ & Masks[s]) * Magics[s]) >> Shifts[s]);