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• Bitops/signed-byte-p

Signed-byte-p-when-signed-byte-p-smaller

An N-bit signed is an M-bit signed for any M >= N.

Definitions and Theorems

Theorem: signed-byte-p-when-signed-byte-p-smaller

(defthm signed-byte-p-when-signed-byte-p-smaller
  (implies (and (signed-byte-p size1 x)
                (<= size1 (nfix size2)))
           (signed-byte-p size2 x)))