Simplify bitbase.cpp

[stockfish] / src / bitboard.h

diff --git a/src/bitboard.h b/src/bitboard.h
index b99cc2597ceb7959709b50c1dbfa3514e2479383..e3331bd440784c1e2bdec3154012c6f03d2a2c9f 100644 (file)
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -33,7 +33,7 @@ void print(Bitboard b);
 namespace Bitbases {
 
 void init_kpk();
-uint32_t probe_kpk(Square wksq, Square wpsq, Square bksq, Color stm);
+bool probe_kpk(Square wksq, Square wpsq, Square bksq, Color stm);
 
 }
 
@@ -280,7 +280,7 @@ FORCE_INLINE Square msb(Bitboard b) {
 
 FORCE_INLINE Square pop_lsb(Bitboard* b) {
   const Square s = lsb(*b);
-  *b &= ~(1ULL << s);
+  *b &= *b - 1;
   return s;
 }