The binop stuff you can certainly use freely, the X macro stuff is quite well known so I guess that it's also fine to use. I certainly won't be claiming any copyright on the code I shared =)
My personal preference for licensing is one of the BSD or MIT licenses, I'd rather see things of mine used to makie the world a better place than force people to share what they've done with it.
My first reaction was to say "it should be based on the number of CPU/GPU/*PU instructions". But then, there are things like this: http://www.norvig.com/spell-correct.html. I wonder how much actual new-ness you can pack into, say, 100 instructions on a modern CPU.
That would be a a silly rule, for better or worse 10 lines of Haskell might perform the computation of 500 line of Java (even if they took you the same amount of time to write.. heh).
