>>>> Binary shifts are multiplication and division as well. :P
>>> What you want is binary rotations. ;-)
>> That depends on whether the bits actually get rotated.  From my
>> recollection of x86 assembly, it's a shift, not a rotation. :)
>>
>> Jim
> 
> My recollection, of course, has changed now that I re-read this, I 
> remember ROR and ROL operators, which do in fact rotate.  I just remember 
> using SHL and SHR more frequently.

Whether your processor supports it or not, binary rotations exist. You 
can implement them the hard way if you must. I've seen a few block 
ciphers that use 'em too...

-- 
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