diff options
author | Josh Boyer <jwboyer@gmail.com> | 2006-05-16 05:39:27 -0500 |
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committer | Josh Boyer <jwboyer@gmail.com> | 2006-05-16 05:39:27 -0500 |
commit | 7349dc6de42b696619d7632fb6a016f848d63bca (patch) | |
tree | d98e517e7e1c5ec3906d642c4bedf7c3fdebd364 /include/mtd_swab.h | |
parent | ba3d8f61a6ce84437bc8e92d30b541336fb6b47b (diff) |
Consolidate the swab macros into one location
Signed-off-by: Josh Boyer <jwboyer@gmail.com>
Diffstat (limited to 'include/mtd_swab.h')
-rw-r--r-- | include/mtd_swab.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/mtd_swab.h b/include/mtd_swab.h new file mode 100644 index 0000000..05732a9 --- /dev/null +++ b/include/mtd_swab.h @@ -0,0 +1,33 @@ +#ifndef MTD_SWAB_H +#define MTD_SWAB_H + +#include <endian.h> + +#define swab16(x) \ + ((__u16)( \ + (((__u16)(x) & (__u16)0x00ffU) << 8) | \ + (((__u16)(x) & (__u16)0xff00U) >> 8) )) +#define swab32(x) \ + ((__u32)( \ + (((__u32)(x) & (__u32)0x000000ffUL) << 24) | \ + (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \ + (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \ + (((__u32)(x) & (__u32)0xff000000UL) >> 24) )) + +#if __BYTE_ORDER == __BIG_ENDIAN +#define cpu_to_le16(x) ({ __u16 _x = x; swab16(_x); }) +#define cpu_to_le32(x) ({ __u32 _x = x; swab32(_x); }) +#define cpu_to_be16(x) (x) +#define cpu_to_be32(x) (x) +#else +#define cpu_to_le16(x) (x) +#define cpu_to_le32(x) (x) +#define cpu_to_be16(x) ({ __u16 _x = x; swab16(_x); }) +#define cpu_to_be32(x) ({ __u32 _x = x; swab32(_x); }) +#endif +#define le16_to_cpu(x) cpu_to_le16(x) +#define be16_to_cpu(x) cpu_to_be16(x) +#define le32_to_cpu(x) cpu_to_le32(x) +#define be32_to_cpu(x) cpu_to_be32(x) + +#endif |