[PATCH] D19426: [AArch64] Use the reciprocal estimation machinery

[James Molloy via llvm-commits]

jmolloy accepted this revision.
jmolloy added a comment.
This revision is now accepted and ready to land.

LGTM!

In http://reviews.llvm.org/D19426#421150, @evandro wrote:

> In the meantime, I've been considering how to issue the iterations using `FRSQRTS` and `FRECPS` and it a possible way would be to have new `SDNode` for them, used directly by the `DAGCombiner`, which is by default lowered as a polynomial or, as for ARM, as the respective instructions.  Thoughts?
>
> Thank you.


How does X86 do this?


http://reviews.llvm.org/D19426