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• Ubyte32

Ubyte32-fix

Fixer for ubyte32.

Signature

(ubyte32-fix x) → fixed-x

Arguments

x — Guard (ubyte32p x).

Returns

fixed-x — Type (ubyte32p fixed-x).

Definitions and Theorems

Function: ubyte32-fix

(defun ubyte32-fix (x)
  (declare (xargs :guard (ubyte32p x)))
  (mbe :logic (if (ubyte32p x) x 0)
       :exec x))

Theorem: ubyte32p-of-ubyte32-fix

(defthm ubyte32p-of-ubyte32-fix
  (b* ((fixed-x (ubyte32-fix x)))
    (ubyte32p fixed-x))
  :rule-classes :rewrite)

Theorem: ubyte32-fix-when-ubyte32p

(defthm ubyte32-fix-when-ubyte32p
  (implies (ubyte32p x)
           (equal (ubyte32-fix x) x)))