X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Ftypes.h;h=eebd69e506c2cb19bd9f2390056dad41a2d383e1;hp=367b4278d8b43cbf1fc289435fbf17fc88101e52;hb=a590d1d52deb22dfe42d5e59740ef07853320bb7;hpb=f54c44e6be0deaadefcb428af8d288e75955aa20

diff --git a/src/types.h b/src/types.h
index 367b4278..eebd69e5 100644
--- a/src/types.h
+++ b/src/types.h
@@ -33,6 +33,9 @@
 ///
 /// -DUSE_POPCNT  | Add runtime support for use of popcnt asm-instruction. Works
 ///               | only in 64-bit mode and requires hardware with popcnt support.
+///
+/// -DUSE_PEXT    | Add runtime support for use of pext asm-instruction. Works
+///               | only in 64-bit mode and requires hardware with pext support.
 
 #include <cassert>
 #include <cctype>
@@ -414,7 +417,7 @@ inline MoveType type_of(Move m) {
 }
 
 inline PieceType promotion_type(Move m) {
-  return PieceType(((m >> 12) & 3) + 2);
+  return PieceType(((m >> 12) & 3) + KNIGHT);
 }
 
 inline Move make_move(Square from, Square to) {