Make not sucking at regexp the default...

src/x64/regexp-macro-assembler-x64.cc

 // Copyright 2009 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 21 matching lines @@
 #include "ast.h"
 #include "regexp-stack.h"
 #include "macro-assembler.h"
 #include "regexp-macro-assembler.h"
 #include "x64/macro-assembler-x64.h"
 #include "x64/regexp-macro-assembler-x64.h"
 
 namespace v8 {
 namespace internal {
 
-#ifdef V8_NATIVE_REGEXP
+#ifndef V8_INTERPRETED_REGEXP
 
 /*
  * This assembler uses the following register assignment convention
  * - rdx : currently loaded character(s) as ASCII or UC16. Must be loaded using
  *         LoadCurrentCharacter before using any of the dispatch methods.
  * - rdi : current position in input, as negative offset from end of string.
  *         Please notice that this is the byte offset, not the character
  *         offset! Is always a 32-bit signed (negative) offset, but must be
  *         maintained sign-extended to 64 bits, since it is used as index.
  * - rsi : end of input (points to byte after last character in input),
@@ skipping 1250 matching lines @@
     } else {
       ASSERT(characters == 1);
       __ movzxwl(current_character(),
                  Operand(rsi, rdi, times_1, cp_offset * sizeof(uc16)));
     }
   }
 }
 
 #undef __
 
-#endif  // V8_NATIVE_REGEXP
+#endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal