0aa08ae2f6
We're about to introduce conversion ops which are going to want two different types. We may as well just split the one we have rather than end up with three. There are a couple places where this is mildly inconvenient but most of the time I find it to actually be nicer. Reviewed-by: Jesse Natalie <jenatali@microsoft.com> Reviewed-by: Daniel Stone <daniels@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6945>