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Long-array

Long-array-fix

Fixing function for long-array structures.

Signature
(long-array-fix x) → new-x
Arguments: x — Guard (long-arrayp x).
Returns: new-x — Type (long-arrayp new-x).

Definitions and Theorems

Function: long-array-fix$inline

(defun long-array-fix$inline (x)
 (declare (xargs :guard (long-arrayp x)))
 (let ((__function__ 'long-array-fix))
  (declare (ignorable __function__))
  (mbe
    :logic
    (b* ((components (long-value-list-fix (std::da-nth 0 (cdr x)))))
      (let ((components (if (< (len components) (expt 2 31))
                            components
                          nil)))
        (cons :long-array (list components))))
    :exec x)))

Theorem: long-arrayp-of-long-array-fix

(defthm long-arrayp-of-long-array-fix
  (b* ((new-x (long-array-fix$inline x)))
    (long-arrayp new-x))
  :rule-classes :rewrite)

Theorem: long-array-fix-when-long-arrayp

(defthm long-array-fix-when-long-arrayp
  (implies (long-arrayp x)
           (equal (long-array-fix x) x)))

Function: long-array-equiv$inline

(defun long-array-equiv$inline (acl2::x acl2::y)
  (declare (xargs :guard (and (long-arrayp acl2::x)
                              (long-arrayp acl2::y))))
  (equal (long-array-fix acl2::x)
         (long-array-fix acl2::y)))

Theorem: long-array-equiv-is-an-equivalence

(defthm long-array-equiv-is-an-equivalence
  (and (booleanp (long-array-equiv x y))
       (long-array-equiv x x)
       (implies (long-array-equiv x y)
                (long-array-equiv y x))
       (implies (and (long-array-equiv x y)
                     (long-array-equiv y z))
                (long-array-equiv x z)))
  :rule-classes (:equivalence))

Theorem: long-array-equiv-implies-equal-long-array-fix-1

(defthm long-array-equiv-implies-equal-long-array-fix-1
  (implies (long-array-equiv acl2::x x-equiv)
           (equal (long-array-fix acl2::x)
                  (long-array-fix x-equiv)))
  :rule-classes (:congruence))

Theorem: long-array-fix-under-long-array-equiv

(defthm long-array-fix-under-long-array-equiv
  (long-array-equiv (long-array-fix acl2::x)
                    acl2::x)
  :rule-classes (:rewrite :rewrite-quoted-constant))

Theorem: equal-of-long-array-fix-1-forward-to-long-array-equiv

(defthm equal-of-long-array-fix-1-forward-to-long-array-equiv
  (implies (equal (long-array-fix acl2::x) acl2::y)
           (long-array-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: equal-of-long-array-fix-2-forward-to-long-array-equiv

(defthm equal-of-long-array-fix-2-forward-to-long-array-equiv
  (implies (equal acl2::x (long-array-fix acl2::y))
           (long-array-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: long-array-equiv-of-long-array-fix-1-forward

(defthm long-array-equiv-of-long-array-fix-1-forward
  (implies (long-array-equiv (long-array-fix acl2::x)
                             acl2::y)
           (long-array-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: long-array-equiv-of-long-array-fix-2-forward

(defthm long-array-equiv-of-long-array-fix-2-forward
  (implies (long-array-equiv acl2::x (long-array-fix acl2::y))
           (long-array-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)