| ¬(# bits % 8 = 0 ∧ bits ≠ []), n ≤ # bits2bytes(bits), # bits ≤ 8 * (n - 1) ⊦ bits = [], n = 0, fix(n, bits2bytes(bits)) = bits2bytes(fillsgn(n * 8, bits)) |
n ≤ # bits2bytes(bits), # bits ≤ 8 * (n - 1) ⊦ bits = [], n = 0, fix(n, bits2bytes(bits)) = bits2bytes(fillsgn(n * 8, bits)), # bits % 8 = 0