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Iconst

Iconst-fix

Fixing function for iconst structures.

Signature
(iconst-fix x) → new-x
Arguments: x — Guard (iconstp x).
Returns: new-x — Type (iconstp new-x).

Definitions and Theorems

Function: iconst-fix$inline

(defun iconst-fix$inline (x)
 (declare (xargs :guard (iconstp x)))
 (let ((__function__ 'iconst-fix))
  (declare (ignorable __function__))
  (mbe
    :logic
    (b* ((value (nfix (cdr (std::da-nth 0 (cdr x)))))
         (base (iconst-base-fix (cdr (std::da-nth 1 (cdr x)))))
         (unsignedp (acl2::bool-fix (cdr (std::da-nth 2 (cdr x)))))
         (length (iconst-length-fix (cdr (std::da-nth 3 (cdr x))))))
      (cons :iconst (list (cons 'value value)
                          (cons 'base base)
                          (cons 'unsignedp unsignedp)
                          (cons 'length length))))
    :exec x)))

Theorem: iconstp-of-iconst-fix

(defthm iconstp-of-iconst-fix
  (b* ((new-x (iconst-fix$inline x)))
    (iconstp new-x))
  :rule-classes :rewrite)

Theorem: iconst-fix-when-iconstp

(defthm iconst-fix-when-iconstp
  (implies (iconstp x)
           (equal (iconst-fix x) x)))

Function: iconst-equiv$inline

(defun iconst-equiv$inline (acl2::x acl2::y)
  (declare (xargs :guard (and (iconstp acl2::x)
                              (iconstp acl2::y))))
  (equal (iconst-fix acl2::x)
         (iconst-fix acl2::y)))

Theorem: iconst-equiv-is-an-equivalence

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

Theorem: iconst-equiv-implies-equal-iconst-fix-1

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

Theorem: iconst-fix-under-iconst-equiv

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

Theorem: equal-of-iconst-fix-1-forward-to-iconst-equiv

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

Theorem: equal-of-iconst-fix-2-forward-to-iconst-equiv

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

Theorem: iconst-equiv-of-iconst-fix-1-forward

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

Theorem: iconst-equiv-of-iconst-fix-2-forward

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