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• Sv::vl-expr.lisp

Vl-seltrace-to-path

Turns a seltrace object into an svex path.

Signature

(vl-seltrace-to-path x path) → new-path

Arguments

x — Guard (vl-seltrace-p x).

path — Guard (or (not path) (sv::path-p path)).

Returns

new-path — Empty indicates the seltrace was empty, as in just a bare variable.
    Type (implies new-path (sv::path-p new-path)).

Note: This isn't the end of the story; we still need to deal with e.g. bitselects, partselects, and nonconstant array selects.

Definitions and Theorems

Function: vl-seltrace-to-path

(defun vl-seltrace-to-path (x path)
 (declare (xargs :guard (and (vl-seltrace-p x)
                             (or (not path) (sv::path-p path)))))
 (declare (xargs :guard (equal (vl-seltrace-unres-count x) 0)))
 (let ((__function__ 'vl-seltrace-to-path))
  (declare (ignorable __function__))
  (b*
   (((when (atom x))
     (and path (sv::path-fix path)))
    (path1
     (if path (sv::make-path-scope
                   :namespace (vl-selstep->svex-name (car x))
                   :subpath path)
       (sv::make-path-wire :name (vl-selstep->svex-name (car x))))))
   (vl-seltrace-add-to-path (cdr x)
                            path1))))

Theorem: return-type-of-vl-seltrace-to-path

(defthm return-type-of-vl-seltrace-to-path
  (b* ((new-path (vl-seltrace-to-path x path)))
    (implies new-path (sv::path-p new-path)))
  :rule-classes :rewrite)

Theorem: vl-seltrace-to-path-of-vl-seltrace-fix-x

(defthm vl-seltrace-to-path-of-vl-seltrace-fix-x
  (equal (vl-seltrace-to-path (vl-seltrace-fix x)
                              path)
         (vl-seltrace-to-path x path)))

Theorem: vl-seltrace-to-path-vl-seltrace-equiv-congruence-on-x

(defthm vl-seltrace-to-path-vl-seltrace-equiv-congruence-on-x
  (implies (vl-seltrace-equiv x x-equiv)
           (equal (vl-seltrace-to-path x path)
                  (vl-seltrace-to-path x-equiv path)))
  :rule-classes :congruence)