projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 3c09bae4 CJ |
16 | #if (defined(__mips_isa_rev) && (__mips_isa_rev >= 2)) || \ |
| 17 | defined(_MIPS_ARCH_LOONGSON3A) | |
| 8cdd3a92 | 18 | |
| e0d8b2ec YZ |
19 | static inline __attribute__((nomips16)) __attribute_const__ |
| 20 | __u16 __arch_swab16(__u16 x) | |
| 8cdd3a92 HH |
21 | { |
| 22 | __asm__( | |
| 3c09bae4 CJ |
23 | " .set push \n" |
| 24 | " .set arch=mips32r2 \n" | |
| e0d8b2ec | 25 | " .set nomips16 \n" |
| 8cdd3a92 | 26 | " wsbh %0, %1 \n" |
| 3c09bae4 | 27 | " .set pop \n" |
| 8cdd3a92 HH |
28 | : "=r" (x) |
| 29 | : "r" (x)); | |
| 30 | ||
| 31 | return x; | |
| 32 | } | |
| 33 | #define __arch_swab16 __arch_swab16 | |
| 34 | ||
| e0d8b2ec YZ |
35 | static inline __attribute__((nomips16)) __attribute_const__ |
| 36 | __u32 __arch_swab32(__u32 x) | |
| 8cdd3a92 HH |
37 | { |
| 38 | __asm__( | |
| 3c09bae4 CJ |
39 | " .set push \n" |
| 40 | " .set arch=mips32r2 \n" | |
| e0d8b2ec | 41 | " .set nomips16 \n" |
| 8cdd3a92 HH |
42 | " wsbh %0, %1 \n" |
| 43 | " rotr %0, %0, 16 \n" | |
| 3c09bae4 | 44 | " .set pop \n" |
| 8cdd3a92 HH |
45 | : "=r" (x) |
| 46 | : "r" (x)); | |
| 47 | ||
| 48 | return x; | |
| 49 | } | |
| 50 | #define __arch_swab32 __arch_swab32 | |
| 51 | ||
| b53d4d1f | 52 | /* |
| cfb9a4e7 RB |
53 | * Having already checked for MIPS R2, enable the optimized version for |
| 54 | * 64-bit kernel on r2 CPUs. | |
| b53d4d1f | 55 | */ |
| cfb9a4e7 | 56 | #ifdef __mips64 |
| e0d8b2ec YZ |
57 | static inline __attribute__((nomips16)) __attribute_const__ |
| 58 | __u64 __arch_swab64(__u64 x) | |
| 8cdd3a92 HH |
59 | { |
| 60 | __asm__( | |
| 3c09bae4 CJ |
61 | " .set push \n" |
| 62 | " .set arch=mips64r2 \n" | |
| e0d8b2ec | 63 | " .set nomips16 \n" |
| 3c09bae4 CJ |
64 | " dsbh %0, %1 \n" |
| 65 | " dshd %0, %0 \n" | |
| 66 | " .set pop \n" | |
| 8cdd3a92 HH |
67 | : "=r" (x) |
| 68 | : "r" (x)); | |
| 69 | ||
| 70 | return x; | |
| 71 | } | |
| 72 | #define __arch_swab64 __arch_swab64 | |
| cfb9a4e7 | 73 | #endif /* __mips64 */ |
| 3c09bae4 | 74 | #endif /* MIPS R2 or newer or Loongson 3A */ |
| 8cdd3a92 | 75 | #endif /* _ASM_SWAB_H */ |