91f676819c
There's no legacy register support so we ncessarily write a contiguous vector. In other words, the write_mask is of the form `(1 << x) - 1`. Meanwhile this code asserts the write mask is of the form (1 << x)`. Putting it together the write mask is necessarily always 0x1, writing out a single scalar. Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Reviewed-by: Iago Toral Quiroga <itoral@igalia.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24471>