Adds far-branches to arm64.

runtime/vm/constants_arm64.h

 // Copyright (c) 2014, 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_ARM64_H_
 #define VM_CONSTANTS_ARM64_H_
 
 #include "platform/assert.h"
 
 namespace dart {
@@ skipping 605 matching lines @@
   kImm14Shift = 5,
   kImm14Bits = 14,
   kImm16Shift = 5,
   kImm16Bits = 16,
   kImm16Mask = 0xffff << kImm16Shift,
   kImm19Shift = 5,
   kImm19Bits = 19,
   kImm19Mask = 0x7ffff << kImm19Shift,
   kImm26Shift = 0,
   kImm26Bits = 26,
+  kImm26Mask = 0x03ffffff << kImm26Shift,
 
   kCondShift = 0,
   kCondBits = 4,
+  kCondMask = 0xf << kCondShift,
 
   kSelCondShift = 12,
   kSelCondBits = 4,
 
   // Bitfield immediates.
   kNShift = 22,
   kNBits = 1,
   kImmRShift = 16,
   kImmRBits = 6,
   kImmSShift = 10,
@@ skipping 306 matching lines @@
   static Instr* At(uword pc) { return reinterpret_cast<Instr*>(pc); }
 
  private:
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
 };
 
 }  // namespace dart
 
 #endif  // VM_CONSTANTS_ARM64_H_