Function syevd 

pub fn syevd<T: SolverScalar>(
    handle: &DnHandle,
    jobz: EigMode,
    uplo: Fill,
    n: i32,
    a: &mut DeviceBuffer<T>,
    lda: i32,
    w: &mut DeviceBuffer<T::Real>,
    info: &mut DeviceBuffer<i32>,
) -> Result<()>

Symmetric / Hermitian eigenvalue decomposition: A = Q * diag(w) * Qᵀ.