X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbitcount.h;h=9feed19f9755a94be0022f3e9cf5c891972589d0;hp=a92ad75feb2a60f9aba890a161443f5339c97319;hb=d3091971b789b4be4c56fdf608eae33c5c54bbd4;hpb=13a73f67c018e58b2fd46f886c45ef2b75188c8e

diff --git a/src/bitcount.h b/src/bitcount.h
index a92ad75f..9feed19f 100644
--- a/src/bitcount.h
+++ b/src/bitcount.h
@@ -1,7 +1,7 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008-2013 Marco Costalba, Joona Kiiski, Tord Romstad
+  Copyright (C) 2008-2014 Marco Costalba, Joona Kiiski, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -33,7 +33,7 @@ enum BitCountType {
 };
 
 /// Determine at compile time the best popcount<> specialization according to
-/// whether the platform is 32 or 64 bits, to the maximum number of non-zero
+/// whether the platform is 32 or 64 bit, the maximum number of non-zero
 /// bits to count and if the hardware popcnt instruction is available.
 const BitCountType Full  = HasPopCnt ? CNT_HW_POPCNT : Is64Bit ? CNT_64 : CNT_32;
 const BitCountType Max15 = HasPopCnt ? CNT_HW_POPCNT : Is64Bit ? CNT_64_MAX15 : CNT_32_MAX15;
@@ -96,8 +96,7 @@ inline int popcount<CNT_HW_POPCNT>(Bitboard b) {
 
 #else
 
-  __asm__("popcnt %1, %0" : "=r" (b) : "r" (b));
-  return b;
+  return __builtin_popcountll(b);
 
 #endif
 }