gallivm/nir: add imod support

Just adds support for the imod instruction

Fixes:
dEQP-VK.glsl.operator.binary_operator.mod.*

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6339>
1 file changed