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 <linux/compiler.h> 12 #include <asm/types.h> 13 14 #ifdef __GNUC__ 15 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 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 59 #endif /* CONFIG_CPU_MIPSR2 */ 60 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 68 #if defined(__MIPSEB__) 69 # include <linux/byteorder/big_endian.h> 70 #elif defined(__MIPSEL__) 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 */ 77
