Initial SIMDBC interpreter.

runtime/vm/instructions_dbc.h

Index: runtime/vm/instructions_dbc.h
diff --git a/runtime/vm/instructions_arm.h b/runtime/vm/instructions_dbc.h
similarity index 88%
copy from runtime/vm/instructions_arm.h
copy to runtime/vm/instructions_dbc.h
index 57d48244d55dcdbcafbee7f8c50877ceb7d5eb81..5eb0c6e5bf82af7df5b61430fde80c92272550d4 100644
--- a/runtime/vm/instructions_arm.h
+++ b/runtime/vm/instructions_dbc.h
@@ -1,16 +1,16 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // Classes that describe assembly patterns as used by inline caches.
 
-#ifndef VM_INSTRUCTIONS_ARM_H_
-#define VM_INSTRUCTIONS_ARM_H_
+#ifndef VM_INSTRUCTIONS_DBC_H_
+#define VM_INSTRUCTIONS_DBC_H_
 
 #ifndef VM_INSTRUCTIONS_H_
-#error Do not include instructions_arm.h directly; use instructions.h instead.
+#error Do not include instructions_dbc.h directly; use instructions.h instead.
 #endif
 
-#include "vm/constants_arm.h"
+#include "vm/constants_dbc.h"
 #include "vm/native_entry.h"
 #include "vm/object.h"
 
@@ -99,9 +99,6 @@ class NativeCallPattern : public ValueObject {
 
 
 // Instance call that can switch from an IC call to a megamorphic call
-//   load ICData             load MegamorphicCache
-//   call ICLookup stub  ->  call MegamorphicLookup stub
-//   call target             call target
 class SwitchableCallPattern : public ValueObject {
  public:
   SwitchableCallPattern(uword pc, const Code& code);
@@ -123,10 +120,10 @@ class ReturnPattern : public ValueObject {
  public:
   explicit ReturnPattern(uword pc);
 
-  // bx_lr = 1.
-  static const int kLengthInBytes = 1 * Instr::kInstrSize;
+  static const int kLengthInBytes = 0;
 
   int pattern_length_in_bytes() const {
+    UNIMPLEMENTED();
     return kLengthInBytes;
   }
 
@@ -138,4 +135,4 @@ class ReturnPattern : public ValueObject {
 
 }  // namespace dart
 
-#endif  // VM_INSTRUCTIONS_ARM_H_
+#endif  // VM_INSTRUCTIONS_DBC_H_