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>>1406
The only thing I have on that is the NASM manual, and a link for x86 & x86_64 OPs.
Though you could just google for those.
Or do you have something more specific in mind?
Though the most I could figure one would find on the subject is writing for device drivers, embedded systems and maybe scientific calculations.
Otherwise I suggest you get an assembler, find your OP codes and have at it, not much to it.