Hi! On Fri, Oct 06, 2017 at 02:03:43PM -0400, Michael Meissner wrote: > > Do you really need the mr insns? Can't you express that in the > > arguments? Perhaps using a union of __int128 with something that > > is two long ints? > > My first attempt resulted in the compiler doing move directs to form the > __int128 in the vector unit and then move directs back. So, I figured having > two mr's was a simple price to pay. > > I do have thoughts to replace the two with a built-in (but keep amo.h and the > names), and we can probably eliminate some of the moves.
It's so ugly, even if it doesn't cost much ;-) But don't worry about it, certainly not if the plan is to expand it as a builtin later. Segher
