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Xregs

Xregs-fix

Fixer for xregs.

Signature
(xregs-fix x) → *
Arguments: x — Guard (xregsp x).

Definitions and Theorems

Function: xregs-fix

(defun xregs-fix (x)
  (declare (xargs :guard (xregsp x)))
  (mbe :logic
       (if (xregsp x)
           x
         (acl2::ubyte32-list-fix (take 31 x)))
       :exec x))

Theorem: xregsp-of-xregs-fix

(defthm xregsp-of-xregs-fix
  (xregsp (xregs-fix x)))

Theorem: xregs-fix-when-xregsp

(defthm xregs-fix-when-xregsp
  (implies (xregsp x)
           (equal (xregs-fix x) x)))