/* * 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 */