| 65536 + i * 256 + j = 256 * (i + 256) + j, j < 0, i ≤ 0, ~256 < j, i * 256 + j < 0, ~65536 ≤ i * 256 + j, 0 ≤ (65536 + i * 256 + j) / 256 ⊦ 255 + i % 256 = ((65536 + i * 256 + j) / 256) % 256, j = 0 |
j < 0, i ≤ 0, ~256 < j, i * 256 + j < 0, ~65536 ≤ i * 256 + j, 0 ≤ (256 * (i + 256) + j) / 256 ⊦ 255 + i % 256 = ((256 * (i + 256) + j) / 256) % 256, j = 0