#if defined(XP_WIN) || defined(XP_OS2) || defined(WINCE)
+#if defined(_WIN64)
+
+#if defined(_M_X64) || defined(_M_AMD64) || defined(_AMD64_)
+#define IS_LITTLE_ENDIAN 1
+#undef IS_BIG_ENDIAN
+
+#define JS_BYTES_PER_BYTE 1Ll
+#define JS_BYTES_PER_SHORT 2L
+#define JS_BYTES_PER_INT 4L
+#define JS_BYTES_PER_INT64 8L
+#define JS_BYTES_PER_LONG 4L
+#define JS_BYTES_PER_FLOAT 4L
+#define JS_BYTES_PER_DOUBLE 8L
+#define JS_BYTES_PER_WORD 8L
+#define JS_BYTES_PER_DWORD 8L
+
+#define JS_BITS_PER_BYTE 8L
+#define JS_BITS_PER_SHORT 16L
+#define JS_BITS_PER_INT 32L
+#define JS_BITS_PER_INT64 64L
+#define JS_BITS_PER_LONG 32L
+#define JS_BITS_PER_FLOAT 32L
+#define JS_BITS_PER_DOUBLE 64L
+#define JS_BITS_PER_WORD 64L
+
+#define JS_BITS_PER_BYTE_LOG2 3L
+#define JS_BITS_PER_SHORT_LOG2 4L
+#define JS_BITS_PER_INT_LOG2 5L
+#define JS_BITS_PER_INT64_LOG2 6L
+#define JS_BITS_PER_LONG_LOG2 5L
+#define JS_BITS_PER_FLOAT_LOG2 5L
+#define JS_BITS_PER_DOUBLE_LOG2 6L
+#define JS_BITS_PER_WORD_LOG2 6L
+
+#define JS_ALIGN_OF_SHORT 2L
+#define JS_ALIGN_OF_INT 4L
+#define JS_ALIGN_OF_LONG 4L
+#define JS_ALIGN_OF_INT64 8L
+#define JS_ALIGN_OF_FLOAT 4L
+#define JS_ALIGN_OF_DOUBLE 8L
+#define JS_ALIGN_OF_POINTER 8L
+#define JS_ALIGN_OF_WORD 8L
+
+#define JS_BYTES_PER_WORD_LOG2 3L
+#define JS_BYTES_PER_DWORD_LOG2 3L
+#define PR_WORDS_PER_DWORD_LOG2 0L
+#else /* !(defined(_M_X64) || defined(_M_AMD64) || defined(_AMD64_)) */
+#error "CPU type is unknown"
+#endif /* !(defined(_M_X64) || defined(_M_AMD64) || defined(_AMD64_)) */
+
+#elif defined(_WIN32) || defined(XP_OS2) || defined(WINCE)
+
#ifdef __WATCOMC__
#define HAVE_VA_LIST_AS_ARRAY
#endif
-#if defined(_WIN32) || defined(XP_OS2) || defined(WINCE)
#define IS_LITTLE_ENDIAN 1
#undef IS_BIG_ENDIAN
#endif /* _WIN32 || XP_OS2 || WINCE*/
#if defined(_WINDOWS) && !defined(_WIN32) /* WIN16 */
+
#define IS_LITTLE_ENDIAN 1
#undef IS_BIG_ENDIAN
#define JS_BYTES_PER_WORD_LOG2 2L
#define JS_BYTES_PER_DWORD_LOG2 3L
#define PR_WORDS_PER_DWORD_LOG2 1L
+
#endif /* defined(_WINDOWS) && !defined(_WIN32) */
#elif defined(XP_UNIX) || defined(XP_BEOS)