Mercurial > hg > graal-jvmci-8

diff src/cpu/sparc/vm/vtableStubs_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 9adddb8c0fc8
children 1d037ecd7960
line wrap: on
line diff
--- a/src/cpu/sparc/vm/vtableStubs_sparc.cpp	Wed Mar 11 14:16:13 2009 -0700
+++ b/src/cpu/sparc/vm/vtableStubs_sparc.cpp	Thu Mar 12 10:37:46 2009 -0700
@@ -221,13 +221,15 @@
     if (is_vtable_stub) {
       // ld;ld;ld,jmp,nop
       const int basic = 5*BytesPerInstWord +
-                        // shift;add for load_klass
-                        (UseCompressedOops ? 2*BytesPerInstWord : 0);
+                        // shift;add for load_klass (only shift with zero heap based)
+                        (UseCompressedOops ?
+                         ((Universe::narrow_oop_base() == NULL) ? BytesPerInstWord : 2*BytesPerInstWord) : 0);
       return basic + slop;
     } else {
       const int basic = (28 LP64_ONLY(+ 6)) * BytesPerInstWord +
-                        // shift;add for load_klass
-                        (UseCompressedOops ? 2*BytesPerInstWord : 0);
+                        // shift;add for load_klass (only shift with zero heap based)
+                        (UseCompressedOops ?
+                         ((Universe::narrow_oop_base() == NULL) ? BytesPerInstWord : 2*BytesPerInstWord) : 0);
       return (basic + slop);
     }
   }