Match
(vl-parse-clocking-skew &key (tokstream 'tokstream) (config 'config)) → (mv errmsg? value new-tokstream)
SystemVerilog-2012:
clocking_skew ::= edge_identifier [delay_control] | delay_control
Function:
(defun vl-parse-clocking-skew-fn (tokstream config) (declare (xargs :stobjs (tokstream))) (declare (xargs :guard (vl-loadconfig-p config))) (declare (ignorable config)) (let ((__function__ 'vl-parse-clocking-skew)) (declare (ignorable __function__)) (seq tokstream (when (vl-is-some-token? '(:vl-kwd-posedge :vl-kwd-negedge :vl-kwd-edge)) (edge := (vl-match))) (when (vl-is-token? :vl-pound) (delay := (vl-parse-delay-control))) (unless (or edge delay) (return-raw (vl-parse-error "Expected edge identifier or #delay."))) (return (make-vl-clkskew :delay (and delay (vl-delaycontrol->value delay)) :edge (case (and edge (vl-token->type edge)) (:vl-kwd-posedge :vl-posedge) (:vl-kwd-negedge :vl-negedge) (:vl-kwd-edge :vl-edge) (otherwise :vl-noedge)))))))
Theorem:
(defthm vl-parse-clocking-skew-fails-gracefully (implies (mv-nth 0 (vl-parse-clocking-skew)) (not (mv-nth 1 (vl-parse-clocking-skew)))))
Theorem:
(defthm vl-warning-p-of-vl-parse-clocking-skew (iff (vl-warning-p (mv-nth 0 (vl-parse-clocking-skew))) (mv-nth 0 (vl-parse-clocking-skew))))
Theorem:
(defthm vl-parse-clocking-skew-result (implies (and t) (equal (vl-clkskew-p (mv-nth 1 (vl-parse-clocking-skew))) (not (mv-nth 0 (vl-parse-clocking-skew))))))
Theorem:
(defthm vl-parse-clocking-skew-count-strong (and (<= (vl-tokstream-measure :tokstream (mv-nth 2 (vl-parse-clocking-skew))) (vl-tokstream-measure)) (implies (not (mv-nth 0 (vl-parse-clocking-skew))) (< (vl-tokstream-measure :tokstream (mv-nth 2 (vl-parse-clocking-skew))) (vl-tokstream-measure)))) :rule-classes ((:rewrite) (:linear)))
Theorem:
(defthm vl-parse-clocking-skew-is-also-a-maybe-clkskew (b* (((mv ?err val ?tokstream) (vl-parse-clocking-skew))) (vl-maybe-clkskew-p val)))