Implement some intrinsics on x64, fix a bug in ia32 intrinciscs (must return false if there is a fa…

runtime/vm/instructions_x64.h

 // Copyright (c) 2012, 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.
 // Classes that describe assembly patterns as used by inline caches.
 
 #ifndef VM_INSTRUCTIONS_X64_H_
 #define VM_INSTRUCTIONS_X64_H_
 
 #ifndef VM_INSTRUCTIONS_H_
 #error Do not include instructions_ia32.h directly; use instructions.h instead.
@@ skipping 68 matching lines @@
  private:
   virtual const int* pattern() const;
 
   DISALLOW_COPY_AND_ASSIGN(CallPattern);
 };
 
 
 class JumpPattern : public CallOrJumpPattern {
  public:
   explicit JumpPattern(uword pc) : CallOrJumpPattern(pc) {}
+  static int InstructionLength() {
+    return kLengthInBytes;
+  }
 
  private:
   virtual const int* pattern() const;
 
   DISALLOW_COPY_AND_ASSIGN(JumpPattern);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INSTRUCTIONS_X64_H_