Rename A64 port to ARM64 port

src/arm64/utils-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
 // met:
 //
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-#if V8_TARGET_ARCH_A64
+#if V8_TARGET_ARCH_ARM64
 
-#include "a64/utils-a64.h"
+#include "arm64/utils-arm64.h"
 
 
 namespace v8 {
 namespace internal {
 
 #define __ assm->
 
 
 int CountLeadingZeros(uint64_t value, int width) {
-  // TODO(jbramley): Optimize this for A64 hosts.
+  // TODO(jbramley): Optimize this for ARM64 hosts.
   ASSERT((width == 32) || (width == 64));
   int count = 0;
   uint64_t bit_test = 1UL << (width - 1);
   while ((count < width) && ((bit_test & value) == 0)) {
     count++;
     bit_test >>= 1;
   }
   return count;
 }
 
 
 int CountLeadingSignBits(int64_t value, int width) {
-  // TODO(jbramley): Optimize this for A64 hosts.
+  // TODO(jbramley): Optimize this for ARM64 hosts.
   ASSERT((width == 32) || (width == 64));
   if (value >= 0) {
     return CountLeadingZeros(value, width) - 1;
   } else {
     return CountLeadingZeros(~value, width) - 1;
   }
 }
 
 
 int CountTrailingZeros(uint64_t value, int width) {
-  // TODO(jbramley): Optimize this for A64 hosts.
+  // TODO(jbramley): Optimize this for ARM64 hosts.
   ASSERT((width == 32) || (width == 64));
   int count = 0;
   while ((count < width) && (((value >> count) & 1) == 0)) {
     count++;
   }
   return count;
 }
 
 
 int CountSetBits(uint64_t value, int width) {
@@ skipping 27 matching lines @@
 
 
 int MaskToBit(uint64_t mask) {
   ASSERT(CountSetBits(mask, 64) == 1);
   return CountTrailingZeros(mask, 64);
 }
 
 
 } }  // namespace v8::internal
 
-#endif  // V8_TARGET_ARCH_A64
+#endif  // V8_TARGET_ARCH_ARM64