Reland "ARM64: Add NEON support"

src/arm64/disasm-arm64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ARM64_DISASM_ARM64_H
 #define V8_ARM64_DISASM_ARM64_H
 
+#include "src/arm64/assembler-arm64.h"
 #include "src/arm64/decoder-arm64.h"
 #include "src/arm64/instructions-arm64.h"
 #include "src/globals.h"
 #include "src/utils.h"
 
 namespace v8 {
 namespace internal {
 
 
 class DisassemblingDecoder : public DecoderVisitor {
  public:
   DisassemblingDecoder();
   DisassemblingDecoder(char* text_buffer, int buffer_size);
   virtual ~DisassemblingDecoder();
   char* GetOutput();
 
   // Declare all Visitor functions.
   #define DECLARE(A)  void Visit##A(Instruction* instr);
   VISITOR_LIST(DECLARE)
   #undef DECLARE
 
  protected:
   virtual void ProcessOutput(Instruction* instr);
 
+  // Default output functions.  The functions below implement a default way of
+  // printing elements in the disassembly. A sub-class can override these to
+  // customize the disassembly output.
+
+  // Prints the name of a register.
+  virtual void AppendRegisterNameToOutput(const CPURegister& reg);
+
   void Format(Instruction* instr, const char* mnemonic, const char* format);
   void Substitute(Instruction* instr, const char* string);
   int SubstituteField(Instruction* instr, const char* format);
   int SubstituteRegisterField(Instruction* instr, const char* format);
   int SubstituteImmediateField(Instruction* instr, const char* format);
   int SubstituteLiteralField(Instruction* instr, const char* format);
   int SubstituteBitfieldImmediateField(Instruction* instr, const char* format);
   int SubstituteShiftField(Instruction* instr, const char* format);
   int SubstituteExtendField(Instruction* instr, const char* format);
   int SubstituteConditionField(Instruction* instr, const char* format);
@@ skipping 40 matching lines @@
 
  private:
   FILE *stream_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ARM64_DISASM_ARM64_H