xref: /openbmc/linux/arch/sh/include/uapi/asm/swab.h (revision ae213c44)
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 
13 static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
14 {
15 	__asm__(
16 #ifdef __SH5__
17 		"byterev	%1, %0\n\t"
18 		"shari		%0, 32, %0"
19 #else
20 		"swap.b		%1, %0\n\t"
21 		"swap.w		%0, %0\n\t"
22 		"swap.b		%0, %0"
23 #endif
24 		: "=r" (x)
25 		: "r" (x));
26 
27 	return x;
28 }
29 #define __arch_swab32 __arch_swab32
30 
31 static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
32 {
33 	__asm__(
34 #ifdef __SH5__
35 		"byterev	%1, %0\n\t"
36 		"shari		%0, 32, %0"
37 #else
38 		"swap.b		%1, %0"
39 #endif
40 		: "=r" (x)
41 		:  "r" (x));
42 
43 	return x;
44 }
45 #define __arch_swab16 __arch_swab16
46 
47 static inline __u64 __arch_swab64(__u64 val)
48 {
49 	union {
50 		struct { __u32 a,b; } s;
51 		__u64 u;
52 	} v, w;
53 	v.u = val;
54 	w.s.b = __arch_swab32(v.s.a);
55 	w.s.a = __arch_swab32(v.s.b);
56 	return w.u;
57 }
58 #define __arch_swab64 __arch_swab64
59 
60 #endif /* __ASM_SH_SWAB_H */
61