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8cdd3a92 HH |
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_SWAB_H | |
9 | #define _ASM_SWAB_H | |
10 | ||
11 | #include <linux/compiler.h> | |
a9f6acc5 | 12 | #include <linux/types.h> |
8cdd3a92 HH |
13 | |
14 | #define __SWAB_64_THRU_32__ | |
15 | ||
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 __arch_swab16 | |
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 __arch_swab32 | |
40 | ||
b53d4d1f DD |
41 | /* |
42 | * Having already checked for CONFIG_CPU_MIPSR2, enable the | |
43 | * optimized version for 64-bit kernel on r2 CPUs. | |
44 | */ | |
45 | #ifdef CONFIG_64BIT | |
8cdd3a92 HH |
46 | static inline __attribute_const__ __u64 __arch_swab64(__u64 x) |
47 | { | |
48 | __asm__( | |
49 | " dsbh %0, %1\n" | |
50 | " dshd %0, %0" | |
51 | : "=r" (x) | |
52 | : "r" (x)); | |
53 | ||
54 | return x; | |
55 | } | |
56 | #define __arch_swab64 __arch_swab64 | |
b53d4d1f | 57 | #endif /* CONFIG_64BIT */ |
8cdd3a92 HH |
58 | #endif /* CONFIG_CPU_MIPSR2 */ |
59 | #endif /* _ASM_SWAB_H */ |