Adds branch instructions and labels to the MIPS simulator, assembler, disassembler.

runtime/vm/simulator_mips.h

 // Copyright (c) 2013, 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.
 
 // Declares a Simulator for MIPS instructions if we are not generating a native
 // MIPS binary. This Simulator allows us to run and debug MIPS code generation
 // on regular desktop machines.
 // Dart calls into generated code by "calling" the InvokeDartCode stub,
 // which will start execution in the Simulator or forwards to the real entry
 // on a MIPS HW platform.
@@ skipping 100 matching lines @@
   inline int8_t ReadB(uword addr);
   inline uint8_t ReadBU(uword addr);
   inline int16_t ReadH(uword addr, Instr* instr);
   inline uint16_t ReadHU(uword addr, Instr *instr);
   inline int ReadW(uword addr, Instr* instr);
 
   inline void WriteB(uword addr, uint8_t value);
   inline void WriteH(uword addr, uint16_t value, Instr* isntr);
   inline void WriteW(uword addr, int value, Instr* instr);
 
+  void DoBranch(Instr* instr, bool taken, bool likely);
   void DecodeSpecial(Instr* instr);
   void DecodeSpecial2(Instr* instr);
+  void DecodeRegImm(Instr* instr);
   void InstructionDecode(Instr* instr);
 
   void Execute();
   void ExecuteDelaySlot();
 
   friend class SimulatorDebugger;
 };
 
 }  // namespace dart
 
 #endif  // VM_SIMULATOR_MIPS_H_