Messages in this thread | | | Date | Wed, 5 Dec 2007 21:07:34 -0800 | From | Brandon Philips <> | Subject | Re: [PATCH] Documentation about unaligned memory access |
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On 16:11 Mon 03 Dec 2007, Daniel Drake wrote: > Here's a document I wrote after figuring out what unaligned memory access > is all about. I've tried to cover the information I was looking for when > trying to learn about this, without producing a hopelessly detailed/complex > spew. I hope it is useful to others. > > Signed-off-by: Daniel Drake <dsd@gentoo.org> > > --- <snip> > +These macros work work for memory accesses of any length (not just 32 bits as
Remove a "work" here.
> +in the examples above). Be aware that when compared to standard access of > +aligned memory, using these macros to access unaligned memory can be costly in > +terms of performance. > + > +If use of such macros is not convenient, another option is to use memcpy(), > +where the source or destination (or both) are of type u8* or unsigned char*. > +Due to the byte-wise nature of this operation, unaligned accesses are avoided.
Cheers,
Brandon
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