[arm] Basic simulation of msr and mrs.

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 345 matching lines @@
   void GetFpArgs(double* x, double* y, int32_t* z);
   void SetFpResult(const double& result);
   void TrashCallerSaveRegisters();
 
   template<class ReturnType, int register_size>
       ReturnType GetFromVFPRegister(int reg_index);
 
   template<class InputType, int register_size>
       void SetVFPRegister(int reg_index, const InputType& value);
 
+  void SetSpecialRegister(SRegisterFieldMask reg_and_mask, uint32_t value);
+  uint32_t GetFromSpecialRegister(SRegister reg);
+
   void CallInternal(byte* entry);
 
   // Architecture state.
   // Saturating instructions require a Q flag to indicate saturation.
   // There is currently no way to read the CPSR directly, and thus read the Q
   // flag, so this is left unimplemented.
   int32_t registers_[16];
   bool n_flag_;
   bool z_flag_;
   bool c_flag_;
@@ skipping 88 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_