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• Split

Vl-expr-split

Split up complex subexpressions throughout an expression.

Signature

(vl-expr-split x elem delta) → (mv new-x delta)

Arguments

x — Expression to split, which we recur through.
    Guard (vl-expr-p x).

elem — Where this expression occurs; context for error messages and location for new wires/assignments.
    Guard (vl-modelement-p elem).

delta — Guard (vl-delta-p delta).

Returns

new-x — Type (vl-expr-p new-x), given the guard.

delta — Type (vl-delta-p delta), given the guard.

We return a new, expression(-list) that is a replacement for x. If x was already sliceable we just return it unchanged. Otherwise x' will be the name of a newly generated, equivalent wire.

Theorem: return-type-of-vl-expr-split.new-x

(defthm return-type-of-vl-expr-split.new-x
  (implies (and (force (vl-expr-p x))
                (force (vl-modelement-p elem))
                (force (vl-delta-p delta)))
           (b* (((mv ?new-x ?delta)
                 (vl-expr-split x elem delta)))
             (vl-expr-p new-x)))
  :rule-classes :rewrite)

Theorem: return-type-of-vl-expr-split.delta

(defthm return-type-of-vl-expr-split.delta
  (implies (and (force (vl-expr-p x))
                (force (vl-modelement-p elem))
                (force (vl-delta-p delta)))
           (b* (((mv ?new-x ?delta)
                 (vl-expr-split x elem delta)))
             (vl-delta-p delta)))
  :rule-classes :rewrite)

Theorem: return-type-of-vl-exprlist-split.new-x

(defthm return-type-of-vl-exprlist-split.new-x
  (implies (and (force (vl-exprlist-p x))
                (force (vl-modelement-p elem))
                (force (vl-delta-p delta)))
           (b* (((mv ?new-x ?delta)
                 (vl-exprlist-split x elem delta)))
             (and (vl-exprlist-p new-x)
                  (equal (len new-x) (len x)))))
  :rule-classes :rewrite)

Theorem: return-type-of-vl-exprlist-split.delta

(defthm return-type-of-vl-exprlist-split.delta
  (implies (and (force (vl-exprlist-p x))
                (force (vl-modelement-p elem))
                (force (vl-delta-p delta)))
           (b* (((mv ?new-x ?delta)
                 (vl-exprlist-split x elem delta)))
             (vl-delta-p delta)))
  :rule-classes :rewrite)

Subtopics

Vl-exprlist-split