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diff src/cpu/sparc/vm/vm_version_sparc.cpp @ 642:660978a2a31a

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6791178: Specialize for zero as the compressed oop vm heap base Summary: Use zero based compressed oops if java heap is below 32gb and unscaled compressed oops if java heap is below 4gb. Reviewed-by: never, twisti, jcoomes, coleenp
author kvn
date Thu, 12 Mar 2009 10:37:46 -0700
parents 6af0a709d52b
children c771b7f43bbf
line wrap: on
line diff
--- a/src/cpu/sparc/vm/vm_version_sparc.cpp	Wed Mar 11 14:16:13 2009 -0700
+++ b/src/cpu/sparc/vm/vm_version_sparc.cpp	Thu Mar 12 10:37:46 2009 -0700
@@ -72,6 +72,9 @@
         FLAG_SET_ERGO(bool, UseCompressedOops, false);
       }
     }
+    // 32-bit oops don't make sense for the 64-bit VM on sparc
+    // since the 32-bit VM has the same registers and smaller objects.
+    Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
 #endif // _LP64
 #ifdef COMPILER2
     // Indirect branch is the same cost as direct