#pragma once

#include <torch/torch.h>
#include <cstdint>
#include <tuple>


std::tuple<at::Tensor, at::Tensor, at::Tensor> s2_attention_bwd_dkvq_cuda(
    at::Tensor kx,
    at::Tensor vx,
    at::Tensor qy,
    at::Tensor dy,
    at::Tensor quad_weights,
    at::Tensor psi_col_idx,
    at::Tensor psi_row_off,
    int64_t nlon_in, 
    int64_t nlat_out, 
    int64_t nlon_out
);

torch::Tensor s2_attention_fwd_cuda(
    at::Tensor kx,
    at::Tensor vx,
    at::Tensor qy,
    at::Tensor quad_weights,
    at::Tensor psi_col_idx,
    at::Tensor psi_row_off,
    int64_t nlon_in,
    int64_t nlat_out,
    int64_t nlon_out
);