Initial SIMDBC interpreter.

runtime/vm/instructions_dbc.h

-// 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"
 
 namespace dart {
 
 class InstructionPattern : public AllStatic {
  public:
   // Decodes a load sequence ending at 'end' (the last instruction of the
   // load sequence is the instruction before the one at end).  Returns the
   // address of the first instruction in the sequence.  Returns the register
@@ skipping 68 matching lines @@
 
   uword end_;
   intptr_t native_function_pool_index_;
   intptr_t target_code_pool_index_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeCallPattern);
 };
 
 
 // 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);
 
   RawObject* cache() const;
   void SetCache(const MegamorphicCache& cache) const;
   void SetLookupStub(const Code& stub) const;
 
  private:
   const ObjectPool& object_pool_;
   intptr_t cache_pool_index_;
   intptr_t stub_pool_index_;
 
   DISALLOW_COPY_AND_ASSIGN(SwitchableCallPattern);
 };
 
 
 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;
   }
 
   bool IsValid() const;
 
  private:
   const uword pc_;
 };
 
 }  // namespace dart
 
-#endif  // VM_INSTRUCTIONS_ARM_H_
+#endif  // VM_INSTRUCTIONS_DBC_H_