Implements far-branches on ARM.

runtime/vm/constants_arm.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.
 
 #ifndef VM_CONSTANTS_ARM_H_
 #define VM_CONSTANTS_ARM_H_
 
 #include "platform/assert.h"
 
 namespace dart {
@@ skipping 387 matching lines @@
 // }
 //
 class Instr {
  public:
   enum {
     kInstrSize = 4,
     kInstrSizeLog2 = 2,
     kPCReadOffset = 8
   };
 
+  static const int32_t kNopInstruction =  // nop
+      ((AL << kConditionShift) | (0x32 << 20) | (0xf << 12));
   static const int32_t kBreakPointInstruction =  // svc #kBreakpointSvcCode
       ((AL << kConditionShift) | (0xf << 24) | kBreakpointSvcCode);
   static const int kBreakPointInstructionSize = kInstrSize;
   bool IsBreakPoint() {
     return IsBkpt();
   }
 
   // Get the raw instruction bits.
   inline int32_t InstructionBits() const {
     return *reinterpret_cast<const int32_t*>(this);
@@ skipping 238 matching lines @@
   static Instr* At(uword pc) { return reinterpret_cast<Instr*>(pc); }
 
  private:
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
 };
 
 }  // namespace dart
 
 #endif  // VM_CONSTANTS_ARM_H_