| /* | |
| * This file is subject to the terms and conditions of the GNU General Public | |
| * License. See the file "COPYING" in the main directory of this archive | |
| * for more details. | |
| * | |
| * Copyright (C) 1996, 99, 2003 by Ralf Baechle | |
| */ | |
| #ifndef _ASM_SWAB_H | |
| #define _ASM_SWAB_H | |
| #include <linux/compiler.h> | |
| #include <linux/types.h> | |
| #define __SWAB_64_THRU_32__ | |
| #if defined(__mips_isa_rev) && (__mips_isa_rev >= 2) | |
| static inline __attribute_const__ __u16 __arch_swab16(__u16 x) | |
| { | |
| __asm__( | |
| " wsbh %0, %1 \n" | |
| : "=r" (x) | |
| : "r" (x)); | |
| return x; | |
| } | |
| #define __arch_swab16 __arch_swab16 | |
| static inline __attribute_const__ __u32 __arch_swab32(__u32 x) | |
| { | |
| __asm__( | |
| " wsbh %0, %1 \n" | |
| " rotr %0, %0, 16 \n" | |
| : "=r" (x) | |
| : "r" (x)); | |
| return x; | |
| } | |
| #define __arch_swab32 __arch_swab32 | |
| /* | |
| * Having already checked for MIPS R2, enable the optimized version for | |
| * 64-bit kernel on r2 CPUs. | |
| */ | |
| #ifdef __mips64 | |
| static inline __attribute_const__ __u64 __arch_swab64(__u64 x) | |
| { | |
| __asm__( | |
| " dsbh %0, %1\n" | |
| " dshd %0, %0" | |
| : "=r" (x) | |
| : "r" (x)); | |
| return x; | |
| } | |
| #define __arch_swab64 __arch_swab64 | |
| #endif /* __mips64 */ | |
| #endif /* MIPS R2 or newer */ | |
| #endif /* _ASM_SWAB_H */ |