diff -r 6b056026ecad -r 8d82c4dfa722 hotspot/src/share/vm/runtime/vm_version.hpp
--- a/hotspot/src/share/vm/runtime/vm_version.hpp	Wed Sep 19 16:50:26 2012 -0700
+++ b/hotspot/src/share/vm/runtime/vm_version.hpp	Thu Sep 20 16:49:17 2012 +0200
@@ -37,6 +37,10 @@
   static const char*  _s_internal_vm_info_string;
   // These are set by machine-dependent initializations
   static bool         _supports_cx8;
+  static bool         _supports_atomic_getset4;
+  static bool         _supports_atomic_getset8;
+  static bool         _supports_atomic_getadd4;
+  static bool         _supports_atomic_getadd8;
   static unsigned int _logical_processors_per_package;
   static int          _vm_major_version;
   static int          _vm_minor_version;
@@ -75,6 +79,13 @@
 
   // does HW support an 8-byte compare-exchange operation?
   static bool supports_cx8()  {return _supports_cx8;}
+  // does HW support atomic get-and-set or atomic get-and-add?  Used
+  // to guide intrinsification decisions for Unsafe atomic ops
+  static bool supports_atomic_getset4()  {return _supports_atomic_getset4;}
+  static bool supports_atomic_getset8()  {return _supports_atomic_getset8;}
+  static bool supports_atomic_getadd4()  {return _supports_atomic_getadd4;}
+  static bool supports_atomic_getadd8()  {return _supports_atomic_getadd8;}
+
   static unsigned int logical_processors_per_package() {
     return _logical_processors_per_package;
   }