		Search-engine friendly clone of the ACL2 documentation.

A4vec-operations

A4vec-onehot0

Symbolic version of 4vec-onehot0.

Signature
(a4vec-onehot0 x) → res
Arguments: x — Guard (a4vec-p x).
Returns: res — Type (a4vec-p res).

Definitions and Theorems

Function: a4vec-onehot0

(defun a4vec-onehot0 (x)
  (declare (xargs :guard (a4vec-p x)))
  (let ((__function__ 'a4vec-onehot0))
    (declare (ignorable __function__))
    (a4vec-ite (aig-and (a2vec-p x)
                        (aig-not (aig-sign-s (a4vec->upper x))))
               (b* (((mv zero one)
                     (aig-onehot-aux (a4vec->upper x)))
                    (ok (aig-or zero one))
                    (val (aig-scons ok nil)))
                 (a4vec val val))
               (a4vec-x))))

Theorem: a4vec-p-of-a4vec-onehot0

(defthm a4vec-p-of-a4vec-onehot0
  (b* ((res (a4vec-onehot0 x)))
    (a4vec-p res))
  :rule-classes :rewrite)

Theorem: a4vec-onehot0-correct

(defthm a4vec-onehot0-correct
  (equal (a4vec-eval (a4vec-onehot0 x) env)
         (4vec-onehot0 (a4vec-eval x env))))

Theorem: a4vec-onehot0-of-a4vec-fix-x

(defthm a4vec-onehot0-of-a4vec-fix-x
  (equal (a4vec-onehot0 (a4vec-fix x))
         (a4vec-onehot0 x)))

Theorem: a4vec-onehot0-a4vec-equiv-congruence-on-x

(defthm a4vec-onehot0-a4vec-equiv-congruence-on-x
  (implies (a4vec-equiv x x-equiv)
           (equal (a4vec-onehot0 x)
                  (a4vec-onehot0 x-equiv)))
  :rule-classes :congruence)