spmm_cpu.h

#pragma once

#include <torch/extension.h>

std::tuple<torch::Tensor, torch::optional<torch::Tensor>>
spmm_cpu(torch::Tensor rowptr, torch::Tensor col,
         torch::optional<torch::Tensor> optional_value, torch::Tensor mat,
         std::string reduce);

torch::Tensor spmm_value_bw_cpu(torch::Tensor row, torch::Tensor rowptr,
                                torch::Tensor col, torch::Tensor mat,
                                torch::Tensor grad, std::string reduce);