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 | ||
| cfb9a4e7 | 16 | #if defined(__mips_isa_rev) && (__mips_isa_rev >= 2) |
| 8cdd3a92 HH |
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 | 41 | /* |
| cfb9a4e7 RB |
42 | * Having already checked for MIPS R2, enable the optimized version for |
| 43 | * 64-bit kernel on r2 CPUs. | |
| b53d4d1f | 44 | */ |
| cfb9a4e7 | 45 | #ifdef __mips64 |
| 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 | |
| cfb9a4e7 RB |
57 | #endif /* __mips64 */ |
| 58 | #endif /* MIPS R2 or newer */ | |
| 8cdd3a92 | 59 | #endif /* _ASM_SWAB_H */ |