bi: Implement basic 8-bit vec support

Not the most efficient approach but functional.

Signed-off-by: Mary Guillemard <mary.guillemard@collabora.com>
Acked-by: Rebecca Mckeever <rebecca.mckeever@collabora.com>
Reviewed by: Eric R. Smith <eric.smith@collabora.com>

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30088>
1 file changed