2833d0472a
Valhall does not have Bifrost's 4-source MKVEC.v4i8. Instead, it has a (somewhat limtied) 3-source MKVEC.v2i8. The full MKVEC.v4i8 may be lowered to a pair of MKVEC.v2i8 instructions. For good code quality on both Bifrost and Valhall, we need to model both instructions in their full generality. Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17101>