| /* |
| * 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/types.h> |
| |
| #define __SWAB_64_THRU_32__ |
| |
| #ifdef CONFIG_CPU_MIPSR2 |
| |
| static __inline__ __u16 __arch_swab16(__u16 x) |
| { |
| __asm__( |
| " wsbh %0, %1 \n" |
| : "=r" (x) |
| : "r" (x)); |
| |
| return x; |
| } |
| #define __arch_swab16 __arch_swab16 |
| |
| static __inline__ __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 CONFIG_CPU_MIPSR2, enable the |
| * optimized version for 64-bit kernel on r2 CPUs. |
| */ |
| #ifdef CONFIG_64BIT |
| static __inline__ __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 /* CONFIG_64BIT */ |
| #endif /* CONFIG_CPU_MIPSR2 */ |
| #endif /* _ASM_SWAB_H */ |
