		Search-engine friendly clone of the ACL2 documentation.

Vl-gatestrength-p

Vl-dstrength-p

Representation of a drive strength for vl-gatestrength-p objects.

We represent Verilog's drive strengths with the keyword symbols recognized by (vl-dstrength-p x).

BOZO add references to the Verilog-2005 standard, description of what these are.

This is an ordinary defenum.

Function: vl-dstrength-p

(defun vl-dstrength-p (x)
  (declare (xargs :guard t))
  (or (eq x ':vl-supply)
      (eq x ':vl-strong)
      (eq x ':vl-pull)
      (eq x ':vl-weak)
      (eq x ':vl-highz)))

Theorem: type-when-vl-dstrength-p

(defthm type-when-vl-dstrength-p
  (implies (vl-dstrength-p x)
           (if (symbolp x)
               (if (not (equal x 't))
                   (not (equal x 'nil))
                 'nil)
             'nil))
  :rule-classes :compound-recognizer)