Yes, I do 4th order interpolation (M4') on the GPU. This paper is for 3rd order, though, but the methods may extend. I suppose because the fetches are generall

Yes, I do 4th order interpolation (M4') on the GPU. This paper is for 3rd order, though, but the methods may extend. I suppose because the fetches are generally to similar memory regions, there may not be a substantial performance improvement due to L1 and L2 hits on recent GPUs.