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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [include/] [asm-i386/] [unaligned.h] - Rev 1765
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#ifndef __I386_UNALIGNED_H #define __I386_UNALIGNED_H /* * The i386 can do unaligned accesses itself. * * The strange macros are there to make sure these can't * be misused in a way that makes them not work on other * architectures where unaligned accesses aren't as simple. */ /** * get_unaligned - get value from possibly mis-aligned location * @ptr: pointer to value * * This macro should be used for accessing values larger in size than * single bytes at locations that are expected to be improperly aligned, * e.g. retrieving a u16 value from a location not u16-aligned. * * Note that unaligned accesses can be very expensive on some architectures. */ #define get_unaligned(ptr) (*(ptr)) /** * put_unaligned - put value to a possibly mis-aligned location * @val: value to place * @ptr: pointer to location * * This macro should be used for placing values larger in size than * single bytes at locations that are expected to be improperly aligned, * e.g. writing a u16 value to a location not u16-aligned. * * Note that unaligned accesses can be very expensive on some architectures. */ #define put_unaligned(val, ptr) ((void)( *(ptr) = (val) )) #endif