align the different implementations of 1/x
Before this CL, the current rcp (1/x) calculation has enough precision
for color calculations, but not enough for positional calculations.
Introduce a new reciprocal called recip that has more precision for
positions. On Intel, this requires the addition of a Newton-Raphson
iterations, and ARM requires two NR iterations.
Bug = skia:12453
Change-Id: Ib04d71a653ad1326dc114316c1e909fe4d3d364c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/449194
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
1 file changed