pub fn sddmm<T: SparseScalar>(
handle: &Handle,
op_a: Op,
op_b: Op,
alpha: &T,
a: &DnMat<'_, T>,
b: &DnMat<'_, T>,
beta: &T,
c: &mut SpMat<'_, T>,
alg: SDDMMAlg,
workspace: &mut DeviceBuffer<u8>,
) -> Result<()>