		Search-engine friendly clone of the ACL2 documentation.

4vec-xfree-p

Recognizer for 4vecs with no X bits. These have a special relationship with svex-xeval.

Signature
(4vec-xfree-p x) → *
Arguments: x — Guard (4vec-p x).

Definitions and Theorems

Function: 4vec-xfree-p

(defun 4vec-xfree-p (x)
  (declare (xargs :guard (4vec-p x)))
  (let ((__function__ '4vec-xfree-p))
    (declare (ignorable __function__))
    (b* (((4vec x) x))
      (eql -1 (logior (lognot x.upper) x.lower)))))

Subtopics

4vec-xfree-p-basics: Some lemmas about 4vec-xfree-p in the sv/svex/lattice.lisp book.