diff options
Diffstat (limited to 'arch/blackfin/include/asm/swab.h')
| -rw-r--r-- | arch/blackfin/include/asm/swab.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/swab.h b/arch/blackfin/include/asm/swab.h new file mode 100644 index 00000000000..69a051b612b --- /dev/null +++ b/arch/blackfin/include/asm/swab.h @@ -0,0 +1,48 @@ +#ifndef _BLACKFIN_SWAB_H +#define _BLACKFIN_SWAB_H + +#include <asm/types.h> +#include <linux/compiler.h> + +#if defined(__GNUC__) && !defined(__STRICT_ANSI__) || defined(__KERNEL__) +# define __SWAB_64_THRU_32__ +#endif + +#ifdef __GNUC__ + +static __inline__ __attribute_const__ __u32 __arch_swahb32(__u32 xx) +{ + __u32 tmp; + __asm__("%1 = %0 >> 8 (V);\n\t" + "%0 = %0 << 8 (V);\n\t" + "%0 = %0 | %1;\n\t" + : "+d"(xx), "=&d"(tmp)); + return xx; +} +#define __arch_swahb32 __arch_swahb32 + +static __inline__ __attribute_const__ __u32 __arch_swahw32(__u32 xx) +{ + __u32 rv; + __asm__("%0 = PACK(%1.L, %1.H);\n\t": "=d"(rv): "d"(xx)); + return rv; +} +#define __arch_swahw32 __arch_swahw32 + +static __inline__ __attribute_const__ __u32 __arch_swab32(__u32 xx) +{ + return __arch_swahb32(__arch_swahw32(xx)); +} +#define __arch_swab32 __arch_swab32 + +static __inline__ __attribute_const__ __u16 __arch_swab16(__u16 xx) +{ + __u32 xw = xx; + __asm__("%0 <<= 8;\n %0.L = %0.L + %0.H (NS);\n": "+d"(xw)); + return (__u16)xw; +} +#define __arch_swab16 __arch_swab16 + +#endif /* __GNUC__ */ + +#endif /* _BLACKFIN_SWAB_H */ |