Function geqrf 

pub fn geqrf<T: SolverScalar>(
    handle: &DnHandle,
    m: i32,
    n: i32,
    a: &mut DeviceBuffer<T>,
    lda: i32,
    tau: &mut DeviceBuffer<T>,
    info: &mut DeviceBuffer<i32>,
) -> Result<()>

QR factorization: A = Q * R. Overwrites a (upper triangle = R, lower = Householder reflectors); tau receives reflector scalars.