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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 | ||
71a0a724 YZ |
16 | #if !defined(__mips16) && \ |
17 | ((defined(__mips_isa_rev) && (__mips_isa_rev >= 2)) || \ | |
18 | defined(_MIPS_ARCH_LOONGSON3A)) | |
8cdd3a92 | 19 | |
1bb3bf62 | 20 | static inline __attribute_const__ __u16 __arch_swab16(__u16 x) |
8cdd3a92 HH |
21 | { |
22 | __asm__( | |
3c09bae4 CJ |
23 | " .set push \n" |
24 | " .set arch=mips32r2 \n" | |
8cdd3a92 | 25 | " wsbh %0, %1 \n" |
3c09bae4 | 26 | " .set pop \n" |
8cdd3a92 HH |
27 | : "=r" (x) |
28 | : "r" (x)); | |
29 | ||
30 | return x; | |
31 | } | |
32 | #define __arch_swab16 __arch_swab16 | |
33 | ||
1bb3bf62 | 34 | static inline __attribute_const__ __u32 __arch_swab32(__u32 x) |
8cdd3a92 HH |
35 | { |
36 | __asm__( | |
3c09bae4 CJ |
37 | " .set push \n" |
38 | " .set arch=mips32r2 \n" | |
8cdd3a92 HH |
39 | " wsbh %0, %1 \n" |
40 | " rotr %0, %0, 16 \n" | |
3c09bae4 | 41 | " .set pop \n" |
8cdd3a92 HH |
42 | : "=r" (x) |
43 | : "r" (x)); | |
44 | ||
45 | return x; | |
46 | } | |
47 | #define __arch_swab32 __arch_swab32 | |
48 | ||
b53d4d1f | 49 | /* |
cfb9a4e7 RB |
50 | * Having already checked for MIPS R2, enable the optimized version for |
51 | * 64-bit kernel on r2 CPUs. | |
b53d4d1f | 52 | */ |
cfb9a4e7 | 53 | #ifdef __mips64 |
1bb3bf62 | 54 | static inline __attribute_const__ __u64 __arch_swab64(__u64 x) |
8cdd3a92 HH |
55 | { |
56 | __asm__( | |
3c09bae4 CJ |
57 | " .set push \n" |
58 | " .set arch=mips64r2 \n" | |
59 | " dsbh %0, %1 \n" | |
60 | " dshd %0, %0 \n" | |
61 | " .set pop \n" | |
8cdd3a92 HH |
62 | : "=r" (x) |
63 | : "r" (x)); | |
64 | ||
65 | return x; | |
66 | } | |
67 | #define __arch_swab64 __arch_swab64 | |
cfb9a4e7 | 68 | #endif /* __mips64 */ |
71a0a724 | 69 | #endif /* (not __mips16) and (MIPS R2 or newer or Loongson 3A) */ |
8cdd3a92 | 70 | #endif /* _ASM_SWAB_H */ |