Function cusolverDnDsyevdx_bufferSize 

pub unsafe extern "C" fn cusolverDnDsyevdx_bufferSize(
    handle: cusolverDnHandle_t,
    jobz: cusolverEigMode_t,
    range: cusolverEigRange_t,
    uplo: cublasFillMode_t,
    n: c_int,
    A: *const f64,
    lda: c_int,
    vl: f64,
    vu: f64,
    il: c_int,
    iu: c_int,
    meig: *mut c_int,
    W: *const f64,
    lwork: *mut c_int,
) -> cusolverStatus_t