instruction set module

[Jarrett Billingsley]

"nobody_" <spam at spam.spam> wrote in message 
news:egioi6$1482$1 at digitaldaemon.com...
>I might sound really ignorant, so please tell me if I do.
>
> Instruction sets are only accessible throught assembler, right?
> Would it be possible to write an module which makes some of the more 
> general instructions available through functions?
> Or is D already fully uptimized in such a way that this would not yield 
> any performance increase?

Do you mean something like std.intrinsic: 
http://www.digitalmars.com/d/phobos/std_intrinsic.html ?