rearrange so we can use F16 instructions on x86 too

Even without the x86 instructions, I think this is a nice refactor.

Any machine Ivybridge+ (conveniently, my trashcan, laptop, and the GCE
bots) should trigger these instructions in the .native builds.

Change-Id: Ibb6c8d3caa57eed14e4cfd71598da662cbfdcc38
Reviewed-on: https://skia-review.googlesource.com/97221
Reviewed-by: Brian Osman <brianosman@google.com>
1 file changed