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Defbyte-standard-instances

Ubyte1

Fixtype of unsigned bytes of size 1.

Definitions and Theorems

Function: ubyte1-equiv$inline

(defun ubyte1-equiv$inline (x y)
  (declare (xargs :guard (and (ubyte1p x) (ubyte1p y))))
  (equal (ubyte1-fix x) (ubyte1-fix y)))

Theorem: ubyte1-equiv-is-an-equivalence

(defthm ubyte1-equiv-is-an-equivalence
  (and (booleanp (ubyte1-equiv x y))
       (ubyte1-equiv x x)
       (implies (ubyte1-equiv x y)
                (ubyte1-equiv y x))
       (implies (and (ubyte1-equiv x y)
                     (ubyte1-equiv y z))
                (ubyte1-equiv x z)))
  :rule-classes (:equivalence))

Theorem: ubyte1-equiv-implies-equal-ubyte1-fix-1

(defthm ubyte1-equiv-implies-equal-ubyte1-fix-1
  (implies (ubyte1-equiv x x-equiv)
           (equal (ubyte1-fix x)
                  (ubyte1-fix x-equiv)))
  :rule-classes (:congruence))

Theorem: ubyte1-fix-under-ubyte1-equiv

(defthm ubyte1-fix-under-ubyte1-equiv
  (ubyte1-equiv (ubyte1-fix x) x)
  :rule-classes (:rewrite :rewrite-quoted-constant))

Theorem: equal-of-ubyte1-fix-1-forward-to-ubyte1-equiv

(defthm equal-of-ubyte1-fix-1-forward-to-ubyte1-equiv
  (implies (equal (ubyte1-fix x) y)
           (ubyte1-equiv x y))
  :rule-classes :forward-chaining)

Theorem: equal-of-ubyte1-fix-2-forward-to-ubyte1-equiv

(defthm equal-of-ubyte1-fix-2-forward-to-ubyte1-equiv
  (implies (equal x (ubyte1-fix y))
           (ubyte1-equiv x y))
  :rule-classes :forward-chaining)

Theorem: ubyte1-equiv-of-ubyte1-fix-1-forward

(defthm ubyte1-equiv-of-ubyte1-fix-1-forward
  (implies (ubyte1-equiv (ubyte1-fix x) y)
           (ubyte1-equiv x y))
  :rule-classes :forward-chaining)

Theorem: ubyte1-equiv-of-ubyte1-fix-2-forward

(defthm ubyte1-equiv-of-ubyte1-fix-2-forward
  (implies (ubyte1-equiv x (ubyte1-fix y))
           (ubyte1-equiv x y))
  :rule-classes :forward-chaining)

Subtopics

Ubyte1p: Recognizer for ubyte1.
Ubyte1-fix: Fixer for ubyte1.