Begins work on ARM64, first assembler test.

runtime/platform/globals.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef PLATFORM_GLOBALS_H_
 #define PLATFORM_GLOBALS_H_
 
 // __STDC_FORMAT_MACROS has to be defined before including <inttypes.h> to
 // enable platform independent printf format specifiers.
 #ifndef __STDC_FORMAT_MACROS
@@ skipping 178 matching lines @@
 #ifdef __GNUC__
 #define DART_UNUSED __attribute__((unused))
 #else
 #define DART_UNUSED
 #endif
 
 #if !defined(TARGET_ARCH_MIPS)
 #if !defined(TARGET_ARCH_ARM)
 #if !defined(TARGET_ARCH_X64)
 #if !defined(TARGET_ARCH_IA32)
+#if !defined(TARGET_ARCH_ARM64)
 // No target architecture specified pick the one matching the host architecture.
 #if defined(HOST_ARCH_MIPS)
 #define TARGET_ARCH_MIPS 1
 #elif defined(HOST_ARCH_ARM)
 #define TARGET_ARCH_ARM 1
 #elif defined(HOST_ARCH_X64)
 #define TARGET_ARCH_X64 1
 #elif defined(HOST_ARCH_IA32)
 #define TARGET_ARCH_IA32 1
+#elif defined(HOST_ARCH_ARM64)
+#define TARGET_ARCH_ARM64 1
 #else
 #error Automatic target architecture detection failed.
 #endif
 #endif
 #endif
 #endif
 #endif
+#endif
 
 // Verify that host and target architectures match, we cannot
 // have a 64 bit Dart VM generating 32 bit code or vice-versa.
-#if defined(TARGET_ARCH_X64)
+#if defined(TARGET_ARCH_X64) ||                                                \
+    defined(TARGET_ARCH_ARM64)
 #if !defined(ARCH_IS_64_BIT)
 #error Mismatched Host/Target architectures.
 #endif
 #elif defined(TARGET_ARCH_IA32) ||                                             \
       defined(TARGET_ARCH_ARM) ||                                              \
       defined(TARGET_ARCH_MIPS)
 #if !defined(ARCH_IS_32_BIT)
 #error Mismatched Host/Target architectures.
 #endif
 #endif
@@ skipping 261 matching lines @@
 // N.B.: As the GCC manual states, "[s]ince non-static C++ methods
 // have an implicit 'this' argument, the arguments of such methods
 // should be counted from two, not one."
 #define PRINTF_ATTRIBUTE(string_index, first_to_check) \
   __attribute__((__format__(__printf__, string_index, first_to_check)))
 #else
 #define PRINTF_ATTRIBUTE(string_index, first_to_check)
 #endif
 
 #endif  // PLATFORM_GLOBALS_H_