		Search-engine friendly clone of the ACL2 documentation.

Ubyte8-fix

Fixer for ubyte8.

Function: ubyte8-fix

(defun ubyte8-fix (x)
  (declare (xargs :guard (ubyte8p x)))
  (mbe :logic (if (ubyte8p x) x 0)
       :exec x))

Theorem: ubyte8p-of-ubyte8-fix

(defthm ubyte8p-of-ubyte8-fix
  (b* ((fixed-x (ubyte8-fix x)))
    (ubyte8p fixed-x))
  :rule-classes :rewrite)

Theorem: ubyte8-fix-when-ubyte8p

(defthm ubyte8-fix-when-ubyte8p
  (implies (ubyte8p x)
           (equal (ubyte8-fix x) x)))