Re: [RFC] Documentation about unaligned memory access

From: Alan Cox
Date: Thu Nov 22 2007 - 20:33:57 EST


> Most architectures are unable to perform unaligned memory accesses. Any
> unaligned access causes a processor exception.

Not all. Some simply produce the wrong answer - thats oh so much more
exciting.

> You may be wondering why you have never seen these problems on your own
> architecture. Some architectures (such as i386 and x86_64) do not have this
> limitation, but nevertheless it is important for you to write portable code
> that works everywhere.

Its usually faster if you don't misalign on x86 as well.

Alan
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