Although conceptually similar to `vpermd` and `vpermdi`
of Packed SIMD VSX,
Swizzle Moves come in immediate-only form with only up to four
-selectors, where VSX refers to individual bytes and may not
+selectors, where `vpermd` refers to individual bytes and may not
copy constants to the destination.
3D Shader programs commonly use the letters "XYZW"
when referring to the four swizzle indices, and also often