Initial patch for a64.

src/globals.h

 // Copyright 2012 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
@@ skipping 68 matching lines @@
 #define V8_HOST_CAN_READ_UNALIGNED 1
 #else
 #define V8_HOST_ARCH_X64 1
 #define V8_HOST_ARCH_64_BIT 1
 #define V8_HOST_CAN_READ_UNALIGNED 1
 #endif  // __native_client__
 #elif defined(_M_IX86) || defined(__i386__)
 #define V8_HOST_ARCH_IA32 1
 #define V8_HOST_ARCH_32_BIT 1
 #define V8_HOST_CAN_READ_UNALIGNED 1
+#elif defined(__AARCH64EL__)
+#define V8_HOST_ARCH_A64 1
+#define V8_HOST_ARCH_64_BIT 1
+#define V8_HOST_CAN_READ_UNALIGNED 1
 #elif defined(__ARMEL__)
 #define V8_HOST_ARCH_ARM 1
 #define V8_HOST_ARCH_32_BIT 1
 // Some CPU-OS combinations allow unaligned access on ARM. We assume
 // that unaligned accesses are not allowed unless the build system
 // defines the CAN_USE_UNALIGNED_ACCESSES macro to be non-zero.
 #if CAN_USE_UNALIGNED_ACCESSES
 #define V8_HOST_CAN_READ_UNALIGNED 1
 #endif
 #elif defined(__MIPSEL__)
 #define V8_HOST_ARCH_MIPS 1
 #define V8_HOST_ARCH_32_BIT 1
 #else
-#error Host architecture was not detected as supported by v8
+#error "Host architecture was not detected as supported by v8"
 #endif
 
 // Target architecture detection. This may be set externally. If not, detect
 // in the same way as the host architecture, that is, target the native
 // environment as presented by the compiler.
-#if !defined(V8_TARGET_ARCH_X64) && !defined(V8_TARGET_ARCH_IA32) && \
-    !defined(V8_TARGET_ARCH_ARM) && !defined(V8_TARGET_ARCH_MIPS)
+#if !defined(V8_TARGET_ARCH_X64) && !defined(V8_TARGET_ARCH_IA32) &&           \
+    !defined(V8_TARGET_ARCH_A64) && !defined(V8_TARGET_ARCH_ARM) &&            \
+    !defined(V8_TARGET_ARCH_MIPS)
 #if defined(_M_X64) || defined(__x86_64__)
 #define V8_TARGET_ARCH_X64 1
 #elif defined(_M_IX86) || defined(__i386__)
 #define V8_TARGET_ARCH_IA32 1
+#elif defined(__AARCH64EL__)
+#define V8_TARGET_ARCH_A64 1
 #elif defined(__ARMEL__)
 #define V8_TARGET_ARCH_ARM 1
 #elif defined(__MIPSEL__)
 #define V8_TARGET_ARCH_MIPS 1
 #else
 #error Target architecture was not detected as supported by v8
 #endif
 #endif
 
 // Check for supported combinations of host and target architectures.
 #if defined(V8_TARGET_ARCH_IA32) && !defined(V8_HOST_ARCH_IA32)
 #error Target architecture ia32 is only supported on ia32 host
 #endif
 #if defined(V8_TARGET_ARCH_X64) && !defined(V8_HOST_ARCH_X64)
 #error Target architecture x64 is only supported on x64 host
 #endif
 #if (defined(V8_TARGET_ARCH_ARM) && \
     !(defined(V8_HOST_ARCH_IA32) || defined(V8_HOST_ARCH_ARM)))
 #error Target architecture arm is only supported on arm and ia32 host
 #endif
+#if (defined(V8_TARGET_ARCH_A64) && \
+    !(defined(V8_HOST_ARCH_X64) || defined(V8_HOST_ARCH_A64)))
+#error Target architecture a64 is only supported on a64 and x64 host
+#endif
 #if (defined(V8_TARGET_ARCH_MIPS) && \
     !(defined(V8_HOST_ARCH_IA32) || defined(V8_HOST_ARCH_MIPS)))
 #error Target architecture mips is only supported on mips and ia32 host
 #endif
 
 // Determine whether we are running in a simulated environment.
 // Setting USE_SIMULATOR explicitly from the build script will force
 // the use of a simulated environment.
 #if !defined(USE_SIMULATOR)
+#if (defined(V8_TARGET_ARCH_A64) && !defined(V8_HOST_ARCH_A64))
+#define USE_SIMULATOR 1
+#endif
 #if (defined(V8_TARGET_ARCH_ARM) && !defined(V8_HOST_ARCH_ARM))
 #define USE_SIMULATOR 1
 #endif
 #if (defined(V8_TARGET_ARCH_MIPS) && !defined(V8_HOST_ARCH_MIPS))
 #define USE_SIMULATOR 1
 #endif
 #endif
 
 // Support for alternative bool type. This is only enabled if the code is
 // compiled with USE_MYBOOL defined. This catches some nasty type bugs.
@@ skipping 253 matching lines @@
 // the backend, so both modes are represented by the kStrictMode value.
 enum StrictModeFlag {
   kNonStrictMode,
   kStrictMode
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_GLOBALS_H_