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Proof step 4 from proof bib-on-bits (previous step)

~128 ≤ i, i ≤ 127 ⊦ i = bits2int(lastn(8, fillsgn(8, int2bits(i))))

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

seq: ⊦ # bits ≤ n ∧ bits ≠ [] → fillsgn(n, bits) = mklist(bits.first, n - # bits) + bits subst: [bits, n] → [int2bits(i), 8] rotate: F spec: bitopsaux inst: name: fill-fill

Additional information

Used terms: int2bits(i), 8