[NOT FOR COMMIT] Native Client builds of V8 on ia32 and x64.

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index f8d562b34b60faf4941f133a0f21460de9fbd2e4..3b79f52fe25c954b9c57af10add64826bc9e6246 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -123,6 +123,20 @@ BUILTIN_LIST_C(DEF_ARG_TYPE)
 // In the body of the builtin function the arguments can be accessed
 // through the BuiltinArguments object args.
 
+#if defined(V8_ARM_ON_X86_64)
+#define BUILTIN(name)                                      \
+static MaybeObject* Builtin_x86_64_impl##name(name##ArgumentsType args,  \
+                                              Isolate* isolate);         \
+static MaybeObject* Builtin_##name(int arglength, Object** argobject,    \
+                                   Isolate* isolate) {                   \
+  name##ArgumentsType args(arglength, argobject);                        \
+  return Builtin_x86_64_impl##name(args, isolate);                       \
+}                                                                        \
+static MaybeObject* Builtin_x86_64_impl##name(name##ArgumentsType args,  \
+                                              Isolate* isolate)
+
+#else
+
 #ifdef DEBUG
 
 #define BUILTIN(name)                                      \
@@ -143,7 +157,7 @@ BUILTIN_LIST_C(DEF_ARG_TYPE)
   static MaybeObject* Builtin_##name(name##ArgumentsType args, Isolate* isolate)
 
 #endif
-
+#endif  // defined(V8_ARM_ON_X86_64)
 
 static inline bool CalledAsConstructor(Isolate* isolate) {
 #ifdef DEBUG