Function lapacke::dlacn2

pub unsafe fn dlacn2(
    n: i32, 
    v: &mut [f64], 
    x: &mut [f64], 
    isgn: &mut [i32], 
    est: &mut [f64], 
    kase: &mut i32, 
    isave: &mut [i32]
) -> i32