How to run SpMM with half precision?

[wanghongyu2001]

How to run SpMM with half precision? I see that Sputnik only provides an interface for half2. If I have a CSR matrix with val in half precision, do I need to preprocess it? Also, why is the type of column idx is short2? If the matrix is very large, won't it be impossible to store the column indices?

cudaError_t CudaSpmm(int m, int k, int n, int nonzeros,
                     const int* __restrict__ row_indices,
                     const half2* __restrict__ values,
                     const int* __restrict__ row_offsets,
                     const short2* __restrict__ column_indices,
                     const half2* __restrict__ dense_matrix,
                     half2* __restrict__ output_matrix, cudaStream_t stream)

Any response would be helpful, thank you.