X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Ftypes.h;h=eebd69e506c2cb19bd9f2390056dad41a2d383e1;hp=5c9b9366500fca756c797636ad067c6c4ab0eb08;hb=3184852bdce27e387852f4e250c3c5b502706cb3;hpb=f53aea45e3230239d358d4d35357c9ee6bf6fb54

diff --git a/src/types.h b/src/types.h
index 5c9b9366..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>
@@ -71,8 +74,9 @@
 
 #if defined(USE_PEXT)
 #  include <immintrin.h> // Header for _pext_u64() intrinsic
+#  define pext(b, m) _pext_u64(b, m)
 #else
-#  define _pext_u64(b, m) (0)
+#  define pext(b, m) (0)
 #endif
 
 #ifdef _MSC_VER
@@ -413,7 +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) {