1#ifndef _ASM_X86_SWAB_H
2#define _ASM_X86_SWAB_H
3
4#include <linux/types.h>
5#include <linux/compiler.h>
6
7static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
8{
9	asm("bswapl %0" : "=r" (val) : "0" (val));
10	return val;
11}
12#define __arch_swab32 __arch_swab32
13
14static inline __attribute_const__ __u64 __arch_swab64(__u64 val)
15{
16#ifdef __i386__
17	union {
18		struct {
19			__u32 a;
20			__u32 b;
21		} s;
22		__u64 u;
23	} v;
24	v.u = val;
25	asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
26	    : "=r" (v.s.a), "=r" (v.s.b)
27	    : "0" (v.s.a), "1" (v.s.b));
28	return v.u;
29#else /* __i386__ */
30	asm("bswapq %0" : "=r" (val) : "0" (val));
31	return val;
32#endif
33}
34#define __arch_swab64 __arch_swab64
35
36#endif /* _ASM_X86_SWAB_H */
37