1#ifndef _I386_BYTEORDER_H
2#define _I386_BYTEORDER_H
3
4#include <asm/types.h>
5
6#ifdef __GNUC__
7
8/* For avoiding bswap on i386 */
9#ifdef __KERNEL__
10#include <linux/config.h>
11#endif
12
13static __inline__ __const__ __u32 ___arch__swab32(__u32 x)
14{
15#ifdef CONFIG_X86_BSWAP
16	__asm__("bswap %0" : "=r" (x) : "0" (x));
17#else
18	__asm__("xchgb %b0,%h0\n\t"	/* swap lower bytes	*/
19		"rorl $16,%0\n\t"	/* swap words		*/
20		"xchgb %b0,%h0"		/* swap higher bytes	*/
21		:"=q" (x)
22		: "0" (x));
23#endif
24	return x;
25}
26
27static __inline__ __const__ __u16 ___arch__swab16(__u16 x)
28{
29	__asm__("xchgb %b0,%h0"		/* swap bytes		*/ \
30		: "=q" (x) \
31		:  "0" (x)); \
32		return x;
33}
34
35#define __arch__swab32(x) ___arch__swab32(x)
36#define __arch__swab16(x) ___arch__swab16(x)
37
38#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
39#  define __BYTEORDER_HAS_U64__
40#  define __SWAB_64_THRU_32__
41#endif
42
43#endif /* __GNUC__ */
44
45#include <linux/byteorder/little_endian.h>
46
47#endif /* _I386_BYTEORDER_H */
48