Rename A64 port to ARM64 port

src/arm64/constants-arm64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
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 // 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.
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-#ifndef V8_A64_CONSTANTS_A64_H_
-#define V8_A64_CONSTANTS_A64_H_
+#ifndef V8_ARM64_CONSTANTS_ARM64_H_
+#define V8_ARM64_CONSTANTS_ARM64_H_
 
 
 // Assert that this is an LP64 system.
 STATIC_ASSERT(sizeof(int) == sizeof(int32_t));     // NOLINT(runtime/sizeof)
 STATIC_ASSERT(sizeof(long) == sizeof(int64_t));    // NOLINT(runtime/int)
 STATIC_ASSERT(sizeof(void *) == sizeof(int64_t));  // NOLINT(runtime/sizeof)
 STATIC_ASSERT(sizeof(1) == sizeof(int32_t));       // NOLINT(runtime/sizeof)
 STATIC_ASSERT(sizeof(1L) == sizeof(int64_t));      // NOLINT(runtime/sizeof)
 
 
@@ skipping 261 matching lines @@
     case gt:
       return lt;
     case ge:
       return le;
     case le:
       return ge;
     case eq:
       return eq;
     default:
       // In practice this function is only used with a condition coming from
-      // TokenToCondition in lithium-codegen-a64.cc. Any other condition is
+      // TokenToCondition in lithium-codegen-arm64.cc. Any other condition is
       // invalid as it doesn't necessary make sense to reverse it (consider
       // 'mi' for instance).
       UNREACHABLE();
       return nv;
   };
 }
 
 enum FlagsUpdate {
   SetFlags   = 1,
   LeaveFlags = 0
@@ skipping 939 matching lines @@
   UnimplementedFMask = 0x00000000
 };
 
 enum UnallocatedOp {
   UnallocatedFixed = 0x00000000,
   UnallocatedFMask = 0x00000000
 };
 
 } }  // namespace v8::internal
 
-#endif  // V8_A64_CONSTANTS_A64_H_
+#endif  // V8_ARM64_CONSTANTS_ARM64_H_