Forking disassembler and simulator for Thumb2 support;

src/arm/simulator-arm.h

Index: src/arm/simulator-arm.h
===================================================================
--- src/arm/simulator-arm.h	(revision 4001)
+++ src/arm/simulator-arm.h	(working copy)
@@ -232,7 +232,9 @@
   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,
@@ -243,6 +245,11 @@
   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];