blas_sys::cblas_dsbmv

pub unsafe extern fn cblas_dsbmv(layout: CblasLayout, uplo: CblasUplo, n: c_int, k: 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)