--- a/hotspot/src/share/vm/opto/c2_globals.hpp	Fri Nov 29 11:20:34 2013 -0800
+++ b/hotspot/src/share/vm/opto/c2_globals.hpp	Fri Nov 22 14:14:26 2013 +0100
@@ -637,7 +637,7 @@
   diagnostic(bool, OptimizeExpensiveOps, true,                              \
           "Find best control for expensive operations")                     \
                                                                             \
-  product(bool, UseMathExactIntrinsics, true,                               \
+  experimental(bool, UseMathExactIntrinsics, false,                         \
           "Enables intrinsification of various java.lang.Math functions")   \
                                                                             \
   experimental(bool, ReplaceInParentMaps, false,                            \