Revert "Use compiler intrinsic instead of assembly for popcnt"

[stockfish] / src / Makefile

diff --git a/src/Makefile b/src/Makefile
index 562192ca6150690e1216257cb668ab1d634939da..187e7b313404fb5df608a62eba6d38cd81b546fc 100644 (file)
--- a/src/Makefile
+++ b/src/Makefile
@@ -285,7 +285,7 @@ endif
 
 ### 3.9 popcnt
 ifeq ($(popcnt),yes)
-       CXXFLAGS += -msse4.2 -DUSE_POPCNT
+       CXXFLAGS += -msse3 -DUSE_POPCNT
 endif
 
 ### 3.10 pext