projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 */ |