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Vl-match-always-at-some-edges

Recognize and decompose edge-triggered statements.

Signature

(vl-match-always-at-some-edges x) → (mv body? ctrl? edges)

Arguments

x — Guard (vl-stmt-p x).

Returns

body? — Type (equal (vl-stmt-p body?) (if body? t nil)).

ctrl? — Type (and (equal (vl-eventcontrol-p ctrl?) (if body? t nil)) (equal (vl-edge-control-p ctrl?) (if body? t nil))) .

edges — Type (and (vl-evatomlist-p edges) (vl-evatomlist-all-have-edges-p edges) (equal (consp edges) (if body? t nil)) (iff edges body?)) .

Definitions and Theorems

Function: vl-match-always-at-some-edges

(defun vl-match-always-at-some-edges (x)
  (declare (xargs :guard (vl-stmt-p x)))
  (let ((__function__ 'vl-match-always-at-some-edges))
    (declare (ignorable __function__))
    (b* (((unless (eq (vl-stmt-kind x) :vl-timingstmt))
          (mv nil nil nil))
         ((vl-timingstmt x) x)
         ((unless (vl-edge-control-p x.ctrl))
          (mv nil nil nil)))
      (mv x.body x.ctrl
          (vl-eventcontrol->atoms x.ctrl)))))

Theorem: return-type-of-vl-match-always-at-some-edges.body?

(defthm return-type-of-vl-match-always-at-some-edges.body?
  (b* (((mv ?body? ?ctrl? ?edges)
        (vl-match-always-at-some-edges x)))
    (equal (vl-stmt-p body?)
           (if body? t nil)))
  :rule-classes :rewrite)

Theorem: return-type-of-vl-match-always-at-some-edges.ctrl?

(defthm return-type-of-vl-match-always-at-some-edges.ctrl?
  (b* (((mv ?body? ?ctrl? ?edges)
        (vl-match-always-at-some-edges x)))
    (and (equal (vl-eventcontrol-p ctrl?)
                (if body? t nil))
         (equal (vl-edge-control-p ctrl?)
                (if body? t nil))))
  :rule-classes :rewrite)

Theorem: return-type-of-vl-match-always-at-some-edges.edges

(defthm return-type-of-vl-match-always-at-some-edges.edges
  (b* (((mv ?body? ?ctrl? ?edges)
        (vl-match-always-at-some-edges x)))
    (and (vl-evatomlist-p edges)
         (vl-evatomlist-all-have-edges-p edges)
         (equal (consp edges) (if body? t nil))
         (iff edges body?)))
  :rule-classes :rewrite)

Theorem: vl-match-always-at-some-edges-of-vl-stmt-fix-x

(defthm vl-match-always-at-some-edges-of-vl-stmt-fix-x
  (equal (vl-match-always-at-some-edges (vl-stmt-fix x))
         (vl-match-always-at-some-edges x)))

Theorem: vl-match-always-at-some-edges-vl-stmt-equiv-congruence-on-x

(defthm vl-match-always-at-some-edges-vl-stmt-equiv-congruence-on-x
  (implies (vl-stmt-equiv x x-equiv)
           (equal (vl-match-always-at-some-edges x)
                  (vl-match-always-at-some-edges x-equiv)))
  :rule-classes :congruence)