Add X32 port into V8

src/utils.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_UTILS_H_
 #define V8_UTILS_H_
 
 #include <limits.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 1300 matching lines @@
 inline void MemsetPointer(T** dest, U* value, int counter) {
 #ifdef DEBUG
   T* a = NULL;
   U* b = NULL;
   a = b;  // Fake assignment to check assignability.
   USE(a);
 #endif  // DEBUG
 #if V8_HOST_ARCH_IA32
 #define STOS "stosl"
 #elif V8_HOST_ARCH_X64
+#if V8_HOST_ARCH_32_BIT
+#define STOS "addr32 stosl"
+#else
 #define STOS "stosq"
 #endif
+#endif
 #if defined(__native_client__)
   // This STOS sequence does not validate for x86_64 Native Client.
   // Here we #undef STOS to force use of the slower C version.
   // TODO(bradchen): Profile V8 and implement a faster REP STOS
   // here if the profile indicates it matters.
 #undef STOS
 #endif
 
 #if defined(MEMORY_SANITIZER)
   // MemorySanitizer does not understand inline assembly.
@@ skipping 241 matching lines @@
   // Add formatted contents like printf based on a va_list.
   void AddFormattedList(const char* format, va_list list);
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(StringBuilder);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_UTILS_H_