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• Vl-svstmt.lisp

Sv::4vmask-alist-unset-nonblocking

Signature

(sv::4vmask-alist-unset-nonblocking acl2::x) → sv::new-x

Arguments

acl2::x — Guard (sv::4vmask-alist-p acl2::x).

Returns

sv::new-x — Type (sv::4vmask-alist-p sv::new-x).

Definitions and Theorems

Function: 4vmask-alist-unset-nonblocking

(defun sv::4vmask-alist-unset-nonblocking (acl2::x)
 (declare (xargs :guard (sv::4vmask-alist-p acl2::x)))
 (let ((__function__ 'sv::4vmask-alist-unset-nonblocking))
  (declare (ignorable __function__))
  (b* ((acl2::x (sv::4vmask-alist-fix acl2::x)))
   (if (atom acl2::x)
       nil
    (cons
     (cons
          (sv::change-svar
               (caar acl2::x)
               :bits (logandc1 256 (sv::svar->bits (caar acl2::x))))
          (cdar acl2::x))
     (sv::4vmask-alist-unset-nonblocking (cdr acl2::x)))))))

Theorem: 4vmask-alist-p-of-4vmask-alist-unset-nonblocking

(defthm sv::4vmask-alist-p-of-4vmask-alist-unset-nonblocking
  (b* ((sv::new-x (sv::4vmask-alist-unset-nonblocking acl2::x)))
    (sv::4vmask-alist-p sv::new-x))
  :rule-classes :rewrite)

Theorem: 4vmask-alist-unset-nonblocking-of-4vmask-alist-fix-x

(defthm sv::4vmask-alist-unset-nonblocking-of-4vmask-alist-fix-x
  (equal (sv::4vmask-alist-unset-nonblocking
              (sv::4vmask-alist-fix acl2::x))
         (sv::4vmask-alist-unset-nonblocking acl2::x)))

Theorem: 4vmask-alist-unset-nonblocking-4vmask-alist-equiv-congruence-on-x

(defthm
 sv::4vmask-alist-unset-nonblocking-4vmask-alist-equiv-congruence-on-x
 (implies (sv::4vmask-alist-equiv acl2::x sv::x-equiv)
          (equal (sv::4vmask-alist-unset-nonblocking acl2::x)
                 (sv::4vmask-alist-unset-nonblocking sv::x-equiv)))
 :rule-classes :congruence)