| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 | |
| 11 | #include <asm/types.h> |
| 12 | |
| 13 | #ifdef __GNUC__ |
| 14 | |
| 15 | #ifdef CONFIG_CPU_MIPSR2 |
| 16 | |
| 17 | static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x) |
| 18 | { |
| 19 | __asm__( |
| 20 | " wsbh %0, %1 \n" |
| 21 | : "=r" (x) |
| 22 | : "r" (x)); |
| 23 | |
| 24 | return x; |
| 25 | } |
| 26 | #define __arch__swab16(x) ___arch__swab16(x) |
| 27 | |
| 28 | static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x) |
| 29 | { |
| 30 | __asm__( |
| 31 | " wsbh %0, %1 \n" |
| 32 | " rotr %0, %0, 16 \n" |
| 33 | : "=r" (x) |
| 34 | : "r" (x)); |
| 35 | |
| 36 | return x; |
| 37 | } |
| 38 | #define __arch__swab32(x) ___arch__swab32(x) |
| 39 | |
| 40 | #ifdef CONFIG_CPU_MIPS64_R2 |
| 41 | |
| 42 | static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x) |
| 43 | { |
| 44 | __asm__( |
| 45 | " dsbh %0, %1 \n" |
| 46 | " dshd %0, %0 \n" |
| 47 | " drotr %0, %0, 32 \n" |
| 48 | : "=r" (x) |
| 49 | : "r" (x)); |
| 50 | |
| 51 | return x; |
| 52 | } |
| 53 | |
| 54 | #define __arch__swab64(x) ___arch__swab64(x) |
| 55 | |
| 56 | #endif /* CONFIG_CPU_MIPS64_R2 */ |
| 57 | |
| 58 | #endif /* CONFIG_CPU_MIPSR2 */ |
| 59 | |
| 60 | #if !defined(__STRICT_ANSI__) || defined(__KERNEL__) |
| 61 | # define __BYTEORDER_HAS_U64__ |
| 62 | # define __SWAB_64_THRU_32__ |
| 63 | #endif |
| 64 | |
| 65 | #endif /* __GNUC__ */ |
| 66 | |
| 67 | #if defined(__MIPSEB__) |
| 68 | # include <linux/byteorder/big_endian.h> |
| 69 | #elif defined(__MIPSEL__) |
| 70 | # include <linux/byteorder/little_endian.h> |
| 71 | #else |
| 72 | # error "MIPS, but neither __MIPSEB__, nor __MIPSEL__???" |
| 73 | #endif |
| 74 | |
| 75 | #endif /* _ASM_BYTEORDER_H */ |