rblas::matrix_vector::ll::cblas_d::cblas_dspmv

pub unsafe extern fn cblas_dspmv(order: Order, sym: Symmetry, n: c_int, alpha: c_double, a: *const c_double, x: *const c_double, inc_x: c_int, beta: c_double, y: *mut c_double, inc_y: c_int)