blob: fe7dc2d59b6926b7e75a18fd6c103e4d92a884db [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1996, 99, 2003 by Ralf Baechle
7 */
8#ifndef _ASM_BYTEORDER_H
9#define _ASM_BYTEORDER_H
10
Ralf Baechle1e32ceec2006-02-01 15:29:21 +000011#include <linux/compiler.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <asm/types.h>
13
14#ifdef __GNUC__
15
Ralf Baechle1e32ceec2006-02-01 15:29:21 +000016#ifdef CONFIG_CPU_MIPSR2
17
18static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x)
19{
20 __asm__(
21 " wsbh %0, %1 \n"
22 : "=r" (x)
23 : "r" (x));
24
25 return x;
26}
27#define __arch__swab16(x) ___arch__swab16(x)
28
29static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
30{
31 __asm__(
32 " wsbh %0, %1 \n"
33 " rotr %0, %0, 16 \n"
34 : "=r" (x)
35 : "r" (x));
36
37 return x;
38}
39#define __arch__swab32(x) ___arch__swab32(x)
40
Ralf Baechlebbad8122006-02-15 13:06:34 +000041#ifdef CONFIG_CPU_MIPS64_R2
42
43static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x)
44{
45 __asm__(
46 " dsbh %0, %1 \n"
47 " dshd %0, %0 \n"
48 " drotr %0, %0, 32 \n"
49 : "=r" (x)
50 : "r" (x));
51
52 return x;
53}
54
55#define __arch__swab64(x) ___arch__swab64(x)
56
57#endif /* CONFIG_CPU_MIPS64_R2 */
58
Ralf Baechle1e32ceec2006-02-01 15:29:21 +000059#endif /* CONFIG_CPU_MIPSR2 */
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
62# define __BYTEORDER_HAS_U64__
63# define __SWAB_64_THRU_32__
64#endif
65
66#endif /* __GNUC__ */
67
Ralf Baechle49a89ef2007-10-11 23:46:15 +010068#if defined(__MIPSEB__)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069# include <linux/byteorder/big_endian.h>
Ralf Baechle49a89ef2007-10-11 23:46:15 +010070#elif defined(__MIPSEL__)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071# include <linux/byteorder/little_endian.h>
72#else
73# error "MIPS, but neither __MIPSEB__, nor __MIPSEL__???"
74#endif
75
76#endif /* _ASM_BYTEORDER_H */