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| author | Wolfgang Denk <wd@denx.de> | 2011-04-13 21:53:09 +0200 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2011-04-13 21:53:09 +0200 |
| commit | 107b56bdd8e82b07458df11f8df4a01067512281 (patch) | |
| tree | 5408cb88b9aaf65e8b8e96ea812ae09e506bea22 /arch/x86/include/asm/byteorder.h | |
| parent | 2c51983b810d73946f653a4385c65a8b7babbbe1 (diff) | |
| parent | 880c80d004acdc7370ab892df51c37c0cf0ff86d (diff) | |
Merge branch 'master' of git://git.denx.de/u-boot-x86
Diffstat (limited to 'arch/x86/include/asm/byteorder.h')
| -rw-r--r-- | arch/x86/include/asm/byteorder.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/x86/include/asm/byteorder.h b/arch/x86/include/asm/byteorder.h new file mode 100644 index 0000000000..7dfeb8bbed --- /dev/null +++ b/arch/x86/include/asm/byteorder.h @@ -0,0 +1,43 @@ +#ifndef _I386_BYTEORDER_H +#define _I386_BYTEORDER_H + +#include <asm/types.h> + +#ifdef __GNUC__ + + +static __inline__ __u32 ___arch__swab32(__u32 x) +{ +#ifdef CONFIG_X86_BSWAP + __asm__("bswap %0" : "=r" (x) : "0" (x)); +#else + __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */ + "rorl $16,%0\n\t" /* swap words */ + "xchgb %b0,%h0" /* swap higher bytes */ + :"=q" (x) + : "0" (x)); +#endif + return x; +} + +static __inline__ __u16 ___arch__swab16(__u16 x) +{ + __asm__("xchgb %b0,%h0" /* swap bytes */ \ + : "=q" (x) \ + : "0" (x)); \ + return x; +} + +#define __arch__swab32(x) ___arch__swab32(x) +#define __arch__swab16(x) ___arch__swab16(x) + +#if !defined(__STRICT_ANSI__) || defined(__KERNEL__) +# define __BYTEORDER_HAS_U64__ +# define __SWAB_64_THRU_32__ +#endif + +#endif /* __GNUC__ */ + +#include <linux/byteorder/little_endian.h> + +#endif /* _I386_BYTEORDER_H */ |