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chore: add bv_toNat tag for toNat_ofInt #5608

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merged 2 commits into from
Oct 3, 2024
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chore: add bv_toNat tag for toNat_ofInt #5608

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f6aed0c
chore: add bv_toNat tags for toNat_{ofInt, sub}
bollu Oct 3, 2024
6dfbb51
chore: remove BitVec.toNat_sub from simp-set
bollu Oct 3, 2024
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2 changes: 1 addition & 1 deletion src/Init/Data/BitVec/Lemmas.lean
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Expand Up @@ -433,7 +433,7 @@ theorem toInt_inj {x y : BitVec n} : x.toInt = y.toInt ↔ x = y :=
theorem toInt_ne {x y : BitVec n} : x.toInt ≠ y.toInt ↔ x ≠ y := by
rw [Ne, toInt_inj]

@[simp] theorem toNat_ofInt {n : Nat} (i : Int) :
@[simp, bv_toNat] theorem toNat_ofInt {n : Nat} (i : Int) :
(BitVec.ofInt n i).toNat = (i % (2^n : Nat)).toNat := by
unfold BitVec.ofInt
simp
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