Rename A64 port to ARM64 port

src/arm64/cpu-arm64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef V8_A64_CPU_A64_H_
-#define V8_A64_CPU_A64_H_
+#ifndef V8_ARM64_CPU_ARM64_H_
+#define V8_ARM64_CPU_ARM64_H_
 
 #include <stdio.h>
 #include "serialize.h"
 #include "cpu.h"
 
 namespace v8 {
 namespace internal {
 
 
 // CpuFeatures keeps track of which features are supported by the target CPU.
 // Supported features must be enabled by a CpuFeatureScope before use.
 class CpuFeatures : public AllStatic {
  public:
   // Detect features of the target CPU. Set safe defaults if the serializer
   // is enabled (snapshots must be portable).
   static void Probe();
 
   // Check whether a feature is supported by the target CPU.
   static bool IsSupported(CpuFeature f) {
     ASSERT(initialized_);
-    // There are no optional features for A64.
+    // There are no optional features for ARM64.
     return false;
   };
 
   static bool IsFoundByRuntimeProbingOnly(CpuFeature f) {
     ASSERT(initialized_);
-    // There are no optional features for A64.
+    // There are no optional features for ARM64.
     return false;
   }
 
   static bool IsSafeForSnapshot(CpuFeature f) {
     return (IsSupported(f) &&
             (!Serializer::enabled() || !IsFoundByRuntimeProbingOnly(f)));
   }
 
   // I and D cache line size in bytes.
   static unsigned dcache_line_size();
   static unsigned icache_line_size();
 
   static unsigned supported_;
 
   static bool VerifyCrossCompiling() {
-    // There are no optional features for A64.
+    // There are no optional features for ARM64.
     ASSERT(cross_compile_ == 0);
     return true;
   }
 
   static bool VerifyCrossCompiling(CpuFeature f) {
-    // There are no optional features for A64.
+    // There are no optional features for ARM64.
     USE(f);
     ASSERT(cross_compile_ == 0);
     return true;
   }
 
  private:
   // Return the content of the cache type register.
   static uint32_t GetCacheType();
 
   // I and D cache line size in bytes.
   static unsigned icache_line_size_;
   static unsigned dcache_line_size_;
 
 #ifdef DEBUG
   static bool initialized_;
 #endif
 
   // This isn't used (and is always 0), but it is required by V8.
   static unsigned found_by_runtime_probing_only_;
 
   static unsigned cross_compile_;
 
   friend class PlatformFeatureScope;
   DISALLOW_COPY_AND_ASSIGN(CpuFeatures);
 };
 
 } }  // namespace v8::internal
 
-#endif  // V8_A64_CPU_A64_H_
+#endif  // V8_ARM64_CPU_ARM64_H_