[arm] Implement barriers on ARMv6 using CP15.

src/arm/simulator-arm.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 // Declares a Simulator for ARM instructions if we are not generating a native
 // ARM binary. This Simulator allows us to run and debug ARM code generation on
 // regular desktop machines.
 // V8 calls into generated code by "calling" the CALL_GENERATED_CODE macro,
 // which will start execution in the Simulator or forwards to the real entry
@@ skipping 309 matching lines @@
   // Executing is handled based on the instruction type.
   // Both type 0 and type 1 rolled into one.
   void DecodeType01(Instruction* instr);
   void DecodeType2(Instruction* instr);
   void DecodeType3(Instruction* instr);
   void DecodeType4(Instruction* instr);
   void DecodeType5(Instruction* instr);
   void DecodeType6(Instruction* instr);
   void DecodeType7(Instruction* instr);
 
+  // CP15 coprocessor instructions.
+  void DecodeTypeCP15(Instruction* instr);
+
   // Support for VFP.
   void DecodeTypeVFP(Instruction* instr);
   void DecodeType6CoprocessorIns(Instruction* instr);
   void DecodeSpecialCondition(Instruction* instr);
 
   void DecodeVMOVBetweenCoreAndSinglePrecisionRegisters(Instruction* instr);
   void DecodeVCMP(Instruction* instr);
   void DecodeVCVTBetweenDoubleAndSingle(Instruction* instr);
   void DecodeVCVTBetweenFloatingPointAndInteger(Instruction* instr);
 
@@ skipping 125 matching lines @@
   static inline void UnregisterCTryCatch(v8::internal::Isolate* isolate) {
     Simulator::current(isolate)->PopAddress();
   }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // !defined(USE_SIMULATOR)
 #endif  // V8_ARM_SIMULATOR_ARM_H_