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 */

 
 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 */