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• Parse-statements

Vl-parse-disable-statement

Parse a disable_statement.

Signature

(vl-parse-disable-statement atts &key (tokstream 'tokstream) 
                            (config 'config)) 
 
  → 
(mv errmsg? value new-tokstream)

Arguments

config — Guard (vl-loadconfig-p config).

Verilog-2005 Syntax:

disable_statement ::= 'disable' hierarchical_identifier ';'

SystemVerilog-2012 extends this to:

disable_statement ::= 'disable' hierarchical_task_identifier ';'
disable_statement ::= 'disable' hierarchical_block_identifier ';'
disable_statement ::= 'disable' 'fork' ';'

But both of these are just hierarchical_identifier, so really the only extension is fork.

Definitions and Theorems

Function: vl-parse-disable-statement-fn

(defun vl-parse-disable-statement-fn (atts tokstream config)
 (declare (xargs :stobjs (tokstream)))
 (declare (xargs :guard (vl-loadconfig-p config)))
 (declare (ignorable config))
 (declare (xargs :guard (vl-atts-p atts)))
 (let ((__function__ 'vl-parse-disable-statement))
  (declare (ignorable __function__))
  (seq
   tokstream
   (:= (vl-match-token :vl-kwd-disable))
   (when
    (and (not (eq (vl-loadconfig->edition config)
                  :verilog-2005))
         (vl-is-token? :vl-kwd-fork))
    (return-raw
       (vl-parse-error "BOZO not yet implemented: disable fork ;")))
   (id := (vl-parse-hierarchical-identifier nil))
   (:= (vl-match-token :vl-semi))
   (return (vl-disablestmt (make-vl-scopeexpr-end :hid id)
                           atts)))))

Theorem: vl-parse-disable-statement-fails-gracefully

(defthm vl-parse-disable-statement-fails-gracefully
  (implies (mv-nth 0 (vl-parse-disable-statement atts))
           (not (mv-nth 1 (vl-parse-disable-statement atts)))))

Theorem: vl-warning-p-of-vl-parse-disable-statement

(defthm vl-warning-p-of-vl-parse-disable-statement
  (iff (vl-warning-p (mv-nth 0 (vl-parse-disable-statement atts)))
       (mv-nth 0 (vl-parse-disable-statement atts))))

Theorem: vl-parse-disable-statement-result

(defthm vl-parse-disable-statement-result
 (implies
     (and (force (vl-atts-p atts)))
     (equal (vl-stmt-p (mv-nth 1 (vl-parse-disable-statement atts)))
            (not (mv-nth 0 (vl-parse-disable-statement atts))))))

Theorem: vl-parse-disable-statement-count-strong

(defthm vl-parse-disable-statement-count-strong
 (and
  (<= (vl-tokstream-measure
           :tokstream (mv-nth 2 (vl-parse-disable-statement atts)))
      (vl-tokstream-measure))
  (implies
    (not (mv-nth 0 (vl-parse-disable-statement atts)))
    (< (vl-tokstream-measure
            :tokstream (mv-nth 2 (vl-parse-disable-statement atts)))
       (vl-tokstream-measure))))
 :rule-classes ((:rewrite) (:linear)))