Rename A64 port to ARM64 port

src/arm64/codegen-arm64.cc

Index: src/arm64/codegen-arm64.cc
diff --git a/src/a64/codegen-a64.cc b/src/arm64/codegen-arm64.cc
similarity index 98%
rename from src/a64/codegen-a64.cc
rename to src/arm64/codegen-arm64.cc
index 32b32757817693ca5d20b94248db6c5002180d0e..831d44986259c475275d9bb1da30114dd202af06 100644
--- a/src/a64/codegen-a64.cc
+++ b/src/arm64/codegen-arm64.cc
@@ -27,11 +27,11 @@
 
 #include "v8.h"
 
-#if V8_TARGET_ARCH_A64
+#if V8_TARGET_ARCH_ARM64
 
 #include "codegen.h"
 #include "macro-assembler.h"
-#include "simulator-a64.h"
+#include "simulator-arm64.h"
 
 namespace v8 {
 namespace internal {
@@ -39,14 +39,14 @@ namespace internal {
 #define __ ACCESS_MASM(masm)
 
 #if defined(USE_SIMULATOR)
-byte* fast_exp_a64_machine_code = NULL;
+byte* fast_exp_arm64_machine_code = NULL;
 double fast_exp_simulator(double x) {
   Simulator * simulator = Simulator::current(Isolate::Current());
   Simulator::CallArgument args[] = {
       Simulator::CallArgument(x),
       Simulator::CallArgument::End()
   };
-  return simulator->CallDouble(fast_exp_a64_machine_code, args);
+  return simulator->CallDouble(fast_exp_arm64_machine_code, args);
 }
 #endif
 
@@ -92,7 +92,7 @@ UnaryMathFunction CreateExpFunction() {
 #if !defined(USE_SIMULATOR)
   return FUNCTION_CAST<UnaryMathFunction>(buffer);
 #else
-  fast_exp_a64_machine_code = buffer;
+  fast_exp_arm64_machine_code = buffer;
   return &fast_exp_simulator;
 #endif
 }
@@ -546,7 +546,7 @@ void MathExpGenerator::EmitMathExp(MacroAssembler* masm,
   // Continue the common case first. 'mi' tests N == 1.
   __ B(&result_is_finite_non_zero, mi);
 
-  // TODO(jbramley): Consider adding a +infinity register for A64.
+  // TODO(jbramley): Consider adding a +infinity register for ARM64.
   __ Ldr(double_temp2, ExpConstant(constants, 2));    // Synthesize +infinity.
 
   // Select between +0.0 and +infinity. 'lo' tests C == 0.
@@ -612,4 +612,4 @@ void MathExpGenerator::EmitMathExp(MacroAssembler* masm,
 
 } }  // namespace v8::internal
 
-#endif  // V8_TARGET_ARCH_A64
+#endif  // V8_TARGET_ARCH_ARM64