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diff src/cpu/x86/vm/x86_64.ad @ 168:7793bd37a336

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6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops Summary: Generate addresses and implicit null checks with narrow oops to avoid decoding. Reviewed-by: jrose, never
author kvn
date Thu, 29 May 2008 12:04:14 -0700
parents c436414a719e
children 9148c65abefc
line wrap: on
line diff
--- a/src/cpu/x86/vm/x86_64.ad	Wed May 28 21:06:24 2008 -0700
+++ b/src/cpu/x86/vm/x86_64.ad	Thu May 29 12:04:14 2008 -0700
@@ -5202,15 +5202,15 @@
   %}
 %}
 
-// Indirect Memory Times Scale Plus Index Register Plus Offset Operand
-operand indIndexScaleOffsetComp(rRegN src, immL32 off, r12RegL base) %{
+// Indirect Narrow Oop Plus Offset Operand
+operand indNarrowOopOffset(rRegN src, immL32 off) %{
   constraint(ALLOC_IN_RC(ptr_reg));
-  match(AddP (DecodeN src base) off);
+  match(AddP (DecodeN src) off);
 
   op_cost(10);
-  format %{"[$base + $src << 3 + $off] (compressed)" %}
+  format %{"[R12 + $src << 3 + $off] (compressed oop addressing)" %}
   interface(MEMORY_INTER) %{
-    base($base);
+    base(0xc); // R12
     index($src);
     scale(0x3);
     disp($off);
@@ -5365,7 +5365,7 @@
 
 opclass memory(indirect, indOffset8, indOffset32, indIndexOffset, indIndex,
                indIndexScale, indIndexScaleOffset, indPosIndexScaleOffset,
-               indIndexScaleOffsetComp);
+               indNarrowOopOffset);
 
 //----------PIPELINE-----------------------------------------------------------
 // Rules which define the behavior of the target architectures pipeline.