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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [include/] [asm-m68knommu/] [unaligned.h] - Blame information for rev 1765

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1 1633 jcastillo
#ifndef __M68K_UNALIGNED_H
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#define __M68K_UNALIGNED_H
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/*
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 * The m68k can do unaligned accesses itself.
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 *
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 * The strange macros are there to make sure these can't
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 * be misused in a way that makes them not work on other
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 * architectures where unaligned accesses aren't as simple.
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 */
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#ifdef BLASTED_MOTOROLA
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#define get_unaligned(ptr) (*(ptr))
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#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
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#else
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/* However, the simpler architecture m68k devices, including '328 and '332,
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   cannot perform unaligned access. - kja */
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#define get_unaligned(ptr) ({                   \
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        typeof((*(ptr))) x;                     \
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        memcpy(&x, (void*)ptr, sizeof(*(ptr))); \
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        x;                                      \
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})
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#define put_unaligned(val, ptr) ({              \
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        typeof((*(ptr))) x = val;               \
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        memcpy((void*)ptr, &x, sizeof(*(ptr))); \
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})
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#endif
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#endif

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