Function librsb_sys::BLAS_dusmv

pub unsafe extern "C" fn BLAS_dusmv(
    transA: blas_trans_type, 
    alpha: f64, 
    A: blas_sparse_matrix, 
    x: *const f64, 
    incx: c_int, 
    y: *mut f64, 
    incy: c_int
) -> c_int