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[RFC] unaligned memcpy


Hello,

I noticed that strcpy-sse2-unaligned uses aligned loads,unaligned stores 
but memcpy has no unaligned version.

In my opinion unaligned load/aligned store variant would be faster when
Fast_unaligned_load flag is set and more friendly to instruction cache.

I do not plan to implement it in near future so it is one of volunter tasks.



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