Forking disassembler and simulator for Thumb2 support;

src/arm/simulator-arm.h

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 214 matching lines @@
   void DecodeType5(Instr* instr);
   void DecodeType6(Instr* instr);
   void DecodeType7(Instr* instr);
   void DecodeUnconditional(Instr* instr);
 
   // Support for VFP.
   void DecodeTypeVFP(Instr* instr);
   void DecodeType6CoprocessorIns(Instr* instr);
 
   // Executes one instruction.
-  void InstructionDecode(Instr* instr);
+  void InstructionDecode(int32_t pc);
+  void InstructionDecodeArm(Instr* instr);
+  void InstructionDecodeThumb2(byte* pc);
 
   // Runtime call support.
   static void* RedirectExternalReference(void* external_function,
                                          bool fp_return);
 
   // For use in calls that take two double values, constructed from r0, r1, r2
   // and r3.
   void GetFpArgs(double* x, double* y);
   void SetFpResult(const double& result);
   void TrashCallerSaveRegisters();
+  // Thumb specific stuff
+  int32_t GetOperand2(const InstrThumb2& instr, bool* carry_out);
+  int32_t GetRmShiftImm(const InstrThumb2& instr, bool* carry_out);
+  void PrintThumb2(const InstrThumb2& instr);
+  inline bool InThumbMode() const {return (get_pc() & 1) == 1;};
 
   // Architecture state.
   int32_t registers_[16];
   bool n_flag_;
   bool z_flag_;
   bool c_flag_;
   bool v_flag_;
 
   // VFP architecture state.
   unsigned int vfp_register[num_s_registers];
@@ skipping 41 matching lines @@
 
   static inline void UnregisterCTryCatch() {
     assembler::arm::Simulator::current()->PopAddress();
   }
 };
 
 
 #endif  // defined(__arm__)
 
 #endif  // V8_ARM_SIMULATOR_ARM_H_