https://bugs.winehq.org/show_bug.cgi?id=54887
--- Comment #2 from Ethan Lee flibitijibibo@gmail.com --- Wrote the method implementation here:
https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/184
However, this is blocked by what seems like a missing feature when parsing out the function parameters; it currently asserts when the ddx/ddy parameters are anything but literals.