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Proof step 7 from proof byte-is-cast-01 (previous step)

⊦ bits2int(lastn(8, fillsgn(8, int2bits(i)))) = bits2int(lastn(8, fillsgn(8, int2bits(cast(8, i)))))

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

seq: ⊦ cast(i, j) = bits2int(lastn(i→n(i), fillsgn(i→n(i), int2bits(j)))) subst: [j, i] → [i, 8] rotate: F spec: intops inst: name: cast-def

Additional information

Used terms: i, 8