Function cblas_dgbmv

pub unsafe extern "C" fn cblas_dgbmv(
    layout: CBLAS_LAYOUT,
    transa: CBLAS_TRANSPOSE,
    m: c_int,
    n: c_int,
    kl: c_int,
    ku: c_int,
    alpha: c_double,
    a: *const c_double,
    lda: c_int,
    x: *const c_double,
    incx: c_int,
    beta: c_double,
    y: *mut c_double,
    incy: c_int,
)