1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _ASM_X86_SWAB_H
3#define _ASM_X86_SWAB_H
4
5#include <linux/types.h>
6#include <linux/compiler.h>
7
8static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
9{
10 asm("bswapl %0" : "=r" (val) : "0" (val));
11 return val;
12}
13#define __arch_swab32 __arch_swab32
14
15static inline __attribute_const__ __u64 __arch_swab64(__u64 val)
16{
17#ifdef __i386__
18 union {
19 struct {
20 __u32 a;
21 __u32 b;
22 } s;
23 __u64 u;
24 } v;
25 v.u = val;
26 asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
27 : "=r" (v.s.a), "=r" (v.s.b)
28 : "0" (v.s.a), "1" (v.s.b));
29 return v.u;
30#else /* __i386__ */
31 asm("bswapq %0" : "=r" (val) : "0" (val));
32 return val;
33#endif
34}
35#define __arch_swab64 __arch_swab64
36
37#endif /* _ASM_X86_SWAB_H */
38