swab.h

 1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 2#ifndef __ASM_SH_SWAB_H
 3#define __ASM_SH_SWAB_H
 4
 5/*
 6 * Copyright (C) 1999  Niibe Yutaka
 7 * Copyright (C) 2000, 2001  Paolo Alberelli
 8 */
 9#include <linux/compiler.h>
10#include <linux/types.h>
11#include <asm-generic/swab.h>
12
13static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
14{
15	__asm__(
16		"swap.b		%1, %0\n\t"
17		"swap.w		%0, %0\n\t"
18		"swap.b		%0, %0"
19		: "=r" (x)
20		: "r" (x));
21
22	return x;
23}
24#define __arch_swab32 __arch_swab32
25
26static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
27{
28	__asm__(
29		"swap.b		%1, %0"
30		: "=r" (x)
31		:  "r" (x));
32
33	return x;
34}
35#define __arch_swab16 __arch_swab16
36
37static inline __u64 __arch_swab64(__u64 val)
38{
39	union {
40		struct { __u32 a,b; } s;
41		__u64 u;
42	} v, w;
43	v.u = val;
44	w.s.b = __arch_swab32(v.s.a);
45	w.s.a = __arch_swab32(v.s.b);
46	return w.u;
47}
48#define __arch_swab64 __arch_swab64
49
50#endif /* __ASM_SH_SWAB_H */