It was based on reverse engineering and inaccurate.
This also get ride of fp64 usage and will allow us to use it in OpenCL C
shaders for indirect/indexed draw.
On the full 32-bit range, this fixes ~10 millions inaccurate results.
Signed-off-by: Mary Guillemard <mary.guillemard@collabora.com>
Fixes: 467ae0d39d ("panfrost: Factor out panfrost_compute_magic_divisor")
Acked-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Olivia Lee <olivia.lee@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35490>
b53d98eb41