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• Parse-property

Vl-parse-cycledelayrange

Matches cycle_delay_range.

Signature

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

Arguments

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

Grammar rules are as follows:

cycle_delay_range ::= '##' constant_primary
                    | '##' '[' cycle_delay_const_range_expression ']'
                    | '##[*]'
                    | '##[+]'

cycle_delay_const_range_expression ::= constant_expression ':' constant_expression
                                     | constant_expression ':' '$'

But ##[*] just means ##[0:$] and ##[+] just means ##[1:$]. Note also that $ is a valid expression, so there's nothing special we need to do to recognize $ tokens here.

Definitions and Theorems

Function: vl-parse-cycledelayrange-fn

(defun vl-parse-cycledelayrange-fn (tokstream config)
  (declare (xargs :stobjs (tokstream)))
  (declare (xargs :guard (vl-loadconfig-p config)))
  (declare (ignorable config))
  (let ((__function__ 'vl-parse-cycledelayrange))
    (declare (ignorable __function__))
    (seq tokstream
         (:= (vl-match-token :vl-poundpound))
         (unless (vl-is-token? :vl-lbrack)
                 (left := (vl-parse-primary))
                 (return (make-vl-range :msb left :lsb left)))
         (:= (vl-match))
         (when (vl-is-token? :vl-times)
               (:= (vl-match))
               (:= (vl-match-token :vl-rbrack))
               (return (make-vl-range :msb (vl-make-index 0)
                                      :lsb *vl-end-of-sequence-$*)))
         (when (vl-is-token? :vl-plus)
               (:= (vl-match))
               (:= (vl-match-token :vl-rbrack))
               (return (make-vl-range :msb (vl-make-index 1)
                                      :lsb *vl-end-of-sequence-$*)))
         (left := (vl-parse-expression))
         (:= (vl-match-token :vl-colon))
         (right := (vl-parse-expression))
         (:= (vl-match-token :vl-rbrack))
         (return (make-vl-range :msb left :lsb right)))))

Theorem: vl-parse-cycledelayrange-fails-gracefully

(defthm vl-parse-cycledelayrange-fails-gracefully
  (implies (mv-nth 0 (vl-parse-cycledelayrange))
           (not (mv-nth 1 (vl-parse-cycledelayrange)))))

Theorem: vl-warning-p-of-vl-parse-cycledelayrange

(defthm vl-warning-p-of-vl-parse-cycledelayrange
  (iff (vl-warning-p (mv-nth 0 (vl-parse-cycledelayrange)))
       (mv-nth 0 (vl-parse-cycledelayrange))))

Theorem: vl-parse-cycledelayrange-result

(defthm vl-parse-cycledelayrange-result
  (implies (and t)
           (equal (vl-range-p (mv-nth 1 (vl-parse-cycledelayrange)))
                  (not (mv-nth 0 (vl-parse-cycledelayrange))))))

Theorem: vl-parse-cycledelayrange-count-strong

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

Subtopics

*vl-end-of-sequence-$*