Function cblas_dtbsv

pub unsafe extern "C" fn cblas_dtbsv(
    layout: CBLAS_LAYOUT,
    uplo: CBLAS_UPLO,
    transa: CBLAS_TRANSPOSE,
    diag: CBLAS_DIAG,
    n: c_int,
    k: c_int,
    a: *const c_double,
    lda: c_int,
    x: *mut c_double,
    incx: c_int,
)