SkNx refresh

src/effects/gradients/SkRadialGradient.cpp

Index: src/effects/gradients/SkRadialGradient.cpp
diff --git a/src/effects/gradients/SkRadialGradient.cpp b/src/effects/gradients/SkRadialGradient.cpp
index 1560cd2f391906c1b5495c308836dad19391acdc..254e4386249ddf44acd80511390c57a20d26b150 100644
--- a/src/effects/gradients/SkRadialGradient.cpp
+++ b/src/effects/gradients/SkRadialGradient.cpp
@@ -94,8 +94,7 @@ typedef void (* RadialShadeProc)(SkScalar sfx, SkScalar sdx,
         int count, int toggle);
 
 static inline Sk4f fast_sqrt(const Sk4f& R) {
-    // R * R.rsqrt0() is much faster, but it's non-monotonic, which isn't so pretty for gradients.
-    return R * R.rsqrt1();
+    return R * R.rsqrt();
 }
 
 static inline Sk4f sum_squares(const Sk4f& a, const Sk4f& b) {