| 32768 ≤ b2i(by1) * b2i(by2), b2i(by1) < 0, b2i(by2) < 0 ⊦ b2i(by1) * b2i(by2) = s2i(i2s(b2i(by1) * b2i(by2))) |
32768 = ~256 * ~128, 32768 ≤ b2i(by1) * b2i(by2), b2i(by1) < 0, b2i(by2) < 0 ⊦ b2i(by1) * b2i(by2) = s2i(i2s(b2i(by1) * b2i(by2)))
Used formulas: 32768 = ~256 * ~128