summaryrefslogtreecommitdiff
path: root/sys/arch/arm/include/endian.h
blob: 30e79cfc39bf9766e557625f9155db9071a4d890 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
/*	$OpenBSD: endian.h,v 1.9 2017/01/06 00:46:49 jsg Exp $	*/

#ifndef _ARM_ENDIAN_H_
#define _ARM_ENDIAN_H_

#ifdef _KERNEL
#ifdef __GNUC__

static inline __uint16_t
___swap16md(__uint16_t x)
{
	__uint16_t rv;

	__asm ("rev16 %0, %1" : "=r" (rv) : "r" (x));

	return (rv);
}
#define __swap16md(x) ___swap16md(x)

static inline __uint32_t
___swap32md(__uint32_t x)
{
	__uint32_t rv;

	__asm ("rev %0, %1" : "=r" (rv) : "r" (x));

	return (rv);
}
#define __swap32md(x) ___swap32md(x)

static inline __uint64_t
___swap64md(__uint64_t x)
{
	__uint64_t rv;

	rv = (__uint64_t)__swap32md(x >> 32) |
	    (__uint64_t)__swap32md(x) << 32;

	return (rv);
}
#define __swap64md(x) ___swap64md(x)

/* Tell sys/endian.h we have MD variants of the swap macros.  */
#define __HAVE_MD_SWAP

#endif  /* __GNUC__ */
#endif  /* _KERNEL */

#define _BYTE_ORDER _LITTLE_ENDIAN
#define	__STRICT_ALIGNMENT

#ifndef __FROM_SYS__ENDIAN
#include <sys/endian.h>
#endif
#endif /* _ARM_ENDIAN_H_ */