#pragma once

#include <torch/extension.h>

torch::Tensor spline_weighting_fw_cpu(torch::Tensor x, torch::Tensor weight,
                                      torch::Tensor basis,
                                      torch::Tensor weight_index);

torch::Tensor spline_weighting_bw_x_cpu(torch::Tensor grad_out,
                                        torch::Tensor weight,
                                        torch::Tensor basis,
                                        torch::Tensor weight_index);

torch::Tensor spline_weighting_bw_weight_cpu(torch::Tensor grad_out,
                                             torch::Tensor x,
                                             torch::Tensor basis,
                                             torch::Tensor weight_index,
                                             int64_t kernel_size);

torch::Tensor spline_weighting_bw_basis_cpu(torch::Tensor grad_out,
                                            torch::Tensor x,
                                            torch::Tensor weight,
                                            torch::Tensor weight_index);