--- a/hotspot/src/share/vm/utilities/globalDefinitions.hpp	Tue Feb 10 18:39:09 2009 +0300
+++ b/hotspot/src/share/vm/utilities/globalDefinitions.hpp	Tue Feb 17 14:30:24 2009 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -74,6 +74,7 @@
 extern int BitsPerHeapOop;
 
 const int BitsPerJavaInteger = 32;
+const int BitsPerJavaLong    = 64;
 const int BitsPerSize_t      = size_tSize * BitsPerByte;
 
 // Size of a char[] needed to represent a jint as a string in decimal.
@@ -906,6 +907,14 @@
   return log2_intptr(x);
 }
 
+//* the argument must be exactly a power of 2
+inline int exact_log2_long(jlong x) {
+  #ifdef ASSERT
+    if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2");
+  #endif
+  return log2_long(x);
+}
+
 
 // returns integer round-up to the nearest multiple of s (s must be a power of two)
 inline intptr_t round_to(intptr_t x, uintx s) {