PATCH:[darwin] fix load of a misaligned double word

[Segher Boessenkool]

>> The offset (the 3 part) has to be 4 byte aligned, not the whole 
>> address.
>> Another way to put it: the offset has to be a multiple of 4.
>
> Correct.  This is an architectural limitation; the instruction adds 
> two implicit 0 bits at the
> low end of the displacement.  This occurs only for ld/std, not 
> lfd/stfd (go figure).

It is also the case for lwa (everything in primary opcodes 58 and 62, 
really).

I think it's meant to save some opcode space ;-)


Segher