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S4vecs

S3vec-bitand

Signature
(s3vec-bitand x y) → res
Arguments: x — Guard (s4vec-p x).; y — Guard (s4vec-p y).
Returns: res — Type (s4vec-p res).

Definitions and Theorems

Function: s3vec-bitand

(defun s3vec-bitand (x y)
  (declare (xargs :guard (and (s4vec-p x) (s4vec-p y))))
  (let ((__function__ 's3vec-bitand))
    (declare (ignorable __function__))
    (if-s2vec-p (x y)
                (s2vec (sparseint-bitand (s2vec->val x)
                                         (s2vec->val y)))
                (b* (((s4vec x)) ((s4vec y)))
                  (s4vec (sparseint-bitand x.upper y.upper)
                         (sparseint-bitand x.lower y.lower))))))

Theorem: s4vec-p-of-s3vec-bitand

(defthm s4vec-p-of-s3vec-bitand
  (b* ((res (s3vec-bitand x y)))
    (s4vec-p res))
  :rule-classes :rewrite)

Theorem: s3vec-bitand-correct

(defthm s3vec-bitand-correct
  (b* ((?res (s3vec-bitand x y)))
    (equal (s4vec->4vec res)
           (3vec-bitand (s4vec->4vec x)
                        (s4vec->4vec y)))))

Theorem: s3vec-bitand-of-s4vec-fix-x

(defthm s3vec-bitand-of-s4vec-fix-x
  (equal (s3vec-bitand (s4vec-fix x) y)
         (s3vec-bitand x y)))

Theorem: s3vec-bitand-s4vec-equiv-congruence-on-x

(defthm s3vec-bitand-s4vec-equiv-congruence-on-x
  (implies (s4vec-equiv x x-equiv)
           (equal (s3vec-bitand x y)
                  (s3vec-bitand x-equiv y)))
  :rule-classes :congruence)

Theorem: s3vec-bitand-of-s4vec-fix-y

(defthm s3vec-bitand-of-s4vec-fix-y
  (equal (s3vec-bitand x (s4vec-fix y))
         (s3vec-bitand x y)))

Theorem: s3vec-bitand-s4vec-equiv-congruence-on-y

(defthm s3vec-bitand-s4vec-equiv-congruence-on-y
  (implies (s4vec-equiv y y-equiv)
           (equal (s3vec-bitand x y)
                  (s3vec-bitand x y-equiv)))
  :rule-classes :congruence)