+ (guint64) G_GINT64_CONSTANT (0xff00000000000000U)) >> 56)))
+
+/* Arch specific stuff for speed
+ */
+#if defined (__GNUC__) && (__GNUC__ >= 2) && defined (__OPTIMIZE__)
+
+# if __GNUC__ >= 4 && defined (__GNUC_MINOR__) && __GNUC_MINOR__ >= 3
+# define GUINT32_SWAP_LE_BE(val) ((guint32) __builtin_bswap32 ((guint32) (val)))
+# define GUINT64_SWAP_LE_BE(val) ((guint64) __builtin_bswap64 ((guint64) (val)))
+# endif
+
+# if defined (__i386__)
+# define GUINT16_SWAP_LE_BE_IA32(val) \
+ (G_GNUC_EXTENSION \
+ ({ guint16 __v, __x = ((guint16) (val)); \
+ if (__builtin_constant_p (__x)) \
+ __v = GUINT16_SWAP_LE_BE_CONSTANT (__x); \
+ else \
+ __asm__ ("rorw $8, %w0" \
+ : "=r" (__v) \
+ : "0" (__x) \
+ : "cc"); \
+ __v; }))
+# if !defined (__i486__) && !defined (__i586__) \
+ && !defined (__pentium__) && !defined (__i686__) \
+ && !defined (__pentiumpro__) && !defined (__pentium4__)
+# define GUINT32_SWAP_LE_BE_IA32(val) \
+ (G_GNUC_EXTENSION \
+ ({ guint32 __v, __x = ((guint32) (val)); \
+ if (__builtin_constant_p (__x)) \
+ __v = GUINT32_SWAP_LE_BE_CONSTANT (__x); \
+ else \
+ __asm__ ("rorw $8, %w0\n\t" \
+ "rorl $16, %0\n\t" \
+ "rorw $8, %w0" \
+ : "=r" (__v) \
+ : "0" (__x) \
+ : "cc"); \
+ __v; }))
+# else /* 486 and higher has bswap */
+# define GUINT32_SWAP_LE_BE_IA32(val) \
+ (G_GNUC_EXTENSION \
+ ({ guint32 __v, __x = ((guint32) (val)); \
+ if (__builtin_constant_p (__x)) \
+ __v = GUINT32_SWAP_LE_BE_CONSTANT (__x); \
+ else \
+ __asm__ ("bswap %0" \
+ : "=r" (__v) \
+ : "0" (__x)); \
+ __v; }))
+# endif /* processor specific 32-bit stuff */
+# define GUINT64_SWAP_LE_BE_IA32(val) \
+ (G_GNUC_EXTENSION \
+ ({ union { guint64 __ll; \
+ guint32 __l[2]; } __w, __r; \
+ __w.__ll = ((guint64) (val)); \
+ if (__builtin_constant_p (__w.__ll)) \
+ __r.__ll = GUINT64_SWAP_LE_BE_CONSTANT (__w.__ll); \
+ else \
+ { \
+ __r.__l[0] = GUINT32_SWAP_LE_BE (__w.__l[1]); \
+ __r.__l[1] = GUINT32_SWAP_LE_BE (__w.__l[0]); \
+ } \
+ __r.__ll; }))
+ /* Possibly just use the constant version and let gcc figure it out? */
+# define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_IA32 (val))
+# ifndef GUINT32_SWAP_LE_BE
+# define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_IA32 (val))
+# endif
+# ifndef GUINT64_SWAP_LE_BE
+# define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_IA32 (val))
+# endif
+# elif defined (__ia64__)
+# define GUINT16_SWAP_LE_BE_IA64(val) \
+ (G_GNUC_EXTENSION \
+ ({ guint16 __v, __x = ((guint16) (val)); \
+ if (__builtin_constant_p (__x)) \
+ __v = GUINT16_SWAP_LE_BE_CONSTANT (__x); \
+ else \
+ __asm__ __volatile__ ("shl %0 = %1, 48 ;;" \
+ "mux1 %0 = %0, @rev ;;" \
+ : "=r" (__v) \
+ : "r" (__x)); \
+ __v; }))
+# define GUINT32_SWAP_LE_BE_IA64(val) \
+ (G_GNUC_EXTENSION \
+ ({ guint32 __v, __x = ((guint32) (val)); \
+ if (__builtin_constant_p (__x)) \
+ __v = GUINT32_SWAP_LE_BE_CONSTANT (__x); \
+ else \
+ __asm__ __volatile__ ("shl %0 = %1, 32 ;;" \
+ "mux1 %0 = %0, @rev ;;" \
+ : "=r" (__v) \
+ : "r" (__x)); \
+ __v; }))
+# define GUINT64_SWAP_LE_BE_IA64(val) \
+ (G_GNUC_EXTENSION \
+ ({ guint64 __v, __x = ((guint64) (val)); \
+ if (__builtin_constant_p (__x)) \
+ __v = GUINT64_SWAP_LE_BE_CONSTANT (__x); \
+ else \
+ __asm__ __volatile__ ("mux1 %0 = %1, @rev ;;" \
+ : "=r" (__v) \
+ : "r" (__x)); \
+ __v; }))
+# define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_IA64 (val))
+# ifndef GUINT32_SWAP_LE_BE
+# define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_IA64 (val))
+# endif
+# ifndef GUINT64_SWAP_LE_BE
+# define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_IA64 (val))
+# endif
+# elif defined (__x86_64__)
+# define GUINT32_SWAP_LE_BE_X86_64(val) \
+ (G_GNUC_EXTENSION \
+ ({ guint32 __v, __x = ((guint32) (val)); \
+ if (__builtin_constant_p (__x)) \
+ __v = GUINT32_SWAP_LE_BE_CONSTANT (__x); \