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1da177e4 LT |
1 | /* |
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 | ||
1e32ceec | 11 | #include <linux/compiler.h> |
1da177e4 LT |
12 | #include <asm/types.h> |
13 | ||
14 | #ifdef __GNUC__ | |
15 | ||
1e32ceec RB |
16 | #ifdef CONFIG_CPU_MIPSR2 |
17 | ||
18 | static __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 | ||
29 | static __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 | ||
bbad8123 RB |
41 | #ifdef CONFIG_CPU_MIPS64_R2 |
42 | ||
43 | static __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 | ||
1e32ceec RB |
59 | #endif /* CONFIG_CPU_MIPSR2 */ |
60 | ||
1da177e4 LT |
61 | #if !defined(__STRICT_ANSI__) || defined(__KERNEL__) |
62 | # define __BYTEORDER_HAS_U64__ | |
63 | # define __SWAB_64_THRU_32__ | |
64 | #endif | |
65 | ||
66 | #endif /* __GNUC__ */ | |
67 | ||
49a89efb | 68 | #if defined(__MIPSEB__) |
1da177e4 | 69 | # include <linux/byteorder/big_endian.h> |
49a89efb | 70 | #elif defined(__MIPSEL__) |
1da177e4 LT |
71 | # include <linux/byteorder/little_endian.h> |
72 | #else | |
73 | # error "MIPS, but neither __MIPSEB__, nor __MIPSEL__???" | |
74 | #endif | |
75 | ||
76 | #endif /* _ASM_BYTEORDER_H */ |