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- /*
- * 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 */
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