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• Expr-simp

Vl-expr-simp-qmark

Signature

(vl-expr-simp-qmark x args) → new-x

Arguments

x — Expression to rewrite, of the form FOO ? BAR : BAZ.
    Guard (vl-expr-p x).

args — Its already-rewritten args.
    Guard (vl-exprlist-p args).

Returns

new-x — Type (vl-expr-p new-x).

Definitions and Theorems

Function: vl-expr-simp-qmark

(defun vl-expr-simp-qmark (x args)
  (declare (xargs :guard (and (vl-expr-p x)
                              (vl-exprlist-p args))))
  (declare (xargs :guard (and (not (vl-atom-p x))
                              (equal (vl-nonatom->op x) :vl-qmark)
                              (equal (len args) 3))))
  (let ((__function__ 'vl-expr-simp-qmark))
    (declare (ignorable __function__))
    (b* (((list a b c) args)
         ((when (and (not (vl-atom-p a))
                     (eq (vl-nonatom->op a)
                         :vl-unary-bitnot)))
          (b* (((list ~a b c) args)
               (a (first (vl-nonatom->args ~a)))
               (ans (change-vl-nonatom x
                                       :args (list a c b))))
            (vl-cw-ps-seq (vl-cw "QM~ Rewrite ~a0 to ~a1~%" x ans))
            ans))
         ((when (and (vl-expr-resolved-p a)
                     (eql (vl-resolved->val a) 1)
                     (equal (vl-expr->finalwidth x)
                            (vl-expr->finalwidth b))
                     (equal (vl-expr->finaltype x)
                            (vl-expr->finaltype b))))
          (b* ((ans (vl-expr-fix b)))
            (vl-cw-ps-seq (vl-cw "QM1 rewrite ~a0 to ~a1~%" x ans))
            ans))
         ((when (and (vl-expr-resolved-p a)
                     (eql (vl-resolved->val a) 0)
                     (equal (vl-expr->finalwidth x)
                            (vl-expr->finalwidth c))
                     (equal (vl-expr->finaltype x)
                            (vl-expr->finaltype c))))
          (b* ((ans (vl-expr-fix c)))
            (vl-cw-ps-seq (vl-cw "QM0 rewrite ~a0 to ~a1~%" x ans))
            ans)))
      (change-vl-nonatom x :args args))))

Theorem: vl-expr-p-of-vl-expr-simp-qmark

(defthm vl-expr-p-of-vl-expr-simp-qmark
  (b* ((new-x (vl-expr-simp-qmark x args)))
    (vl-expr-p new-x))
  :rule-classes :rewrite)

Theorem: vl-expr-simp-qmark-of-vl-expr-fix-x

(defthm vl-expr-simp-qmark-of-vl-expr-fix-x
  (equal (vl-expr-simp-qmark (vl-expr-fix x)
                             args)
         (vl-expr-simp-qmark x args)))

Theorem: vl-expr-simp-qmark-vl-expr-equiv-congruence-on-x

(defthm vl-expr-simp-qmark-vl-expr-equiv-congruence-on-x
  (implies (vl-expr-equiv x x-equiv)
           (equal (vl-expr-simp-qmark x args)
                  (vl-expr-simp-qmark x-equiv args)))
  :rule-classes :congruence)

Theorem: vl-expr-simp-qmark-of-vl-exprlist-fix-args

(defthm vl-expr-simp-qmark-of-vl-exprlist-fix-args
  (equal (vl-expr-simp-qmark x (vl-exprlist-fix args))
         (vl-expr-simp-qmark x args)))

Theorem: vl-expr-simp-qmark-vl-exprlist-equiv-congruence-on-args

(defthm vl-expr-simp-qmark-vl-exprlist-equiv-congruence-on-args
  (implies (vl-exprlist-equiv args args-equiv)
           (equal (vl-expr-simp-qmark x args)
                  (vl-expr-simp-qmark x args-equiv)))
  :rule-classes :congruence)