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bwap: add qemu_bswap helper 

add helper that can swap values of 4, 2, 1 bytes

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2010-01-14 15:58:52 +02:00
parent 186993ee2f
commit e73d6e3a02
1 changed files with 6 additions and 0 deletions
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bswap.h
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@ -214,4 +214,10 @@ static inline void cpu_to_be32wu(uint32_t *p, uint32_t v)
#undef le_bswaps #undef le_bswaps
#undef be_bswaps #undef be_bswaps
/* len must be one of 1, 2, 4 */
static inline uint32_t qemu_bswap_len(uint32_t value, int len)
{
return bswap32(value) >> (32 - 8 * len);
}
#endif /* BSWAP_H */ #endif /* BSWAP_H */