Function dsyevj_buffer_size 

pub fn dsyevj_buffer_size(
    ctx: &Context,
    mode: EigenMode,
    fill_mode: FillMode,
    n: usize,
    a: &DeviceMemory<f64>,
    lda: usize,
    w: &DeviceMemory<f64>,
    params: &SyevjInfo,
) -> Result<usize>