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• Mod-internal-paths

Extend-internal-paths

(extend-internal-paths a x) constructs a new list where a has been consed onto each element of x.

This is used to extend a list of paths with a new level of the module hierarchy. That is, suppose a is the name of a submodule occurrence, and that x = (x1 x2 ... xn) is the list of paths for all internal wires of that submodule. Then we generate the list:

(list (hons a x1)
      (hons a x2)
      ...
      (hons a xn))

which can loosely be thought of as, a.x1, a.x2, etc.

Definitions and Theorems

Function: extend-internal-paths-exec

(defun extend-internal-paths-exec (a x acc)
  (declare (xargs :guard t))
  (if (atom x)
      acc
    (let ((acc (cons (hons a (car x)) acc)))
      (extend-internal-paths-exec a (cdr x)
                                  acc))))

Function: extend-internal-paths-exec-cons

(defun extend-internal-paths-exec-cons (a x acc)
  (declare (xargs :guard t))
  (mbe :logic
       (extend-internal-paths-exec a x acc)
       :exec
       (if (atom x)
           acc
         (let ((acc (cons (cons a (car x)) acc)))
           (extend-internal-paths-exec-cons a (cdr x)
                                            acc)))))

Function: extend-internal-paths

(defun extend-internal-paths (a x)
  (declare (xargs :guard t))
  (mbe :logic
       (if (atom x)
           nil
         (cons (hons a (car x))
               (extend-internal-paths a (cdr x))))
       :exec (reverse (extend-internal-paths-exec a x nil))))

Theorem: extend-internal-paths-exec-removal

(defthm extend-internal-paths-exec-removal
  (equal (extend-internal-paths-exec a x acc)
         (revappend (extend-internal-paths a x)
                    acc)))

Function: extend-internal-paths-cons

(defun extend-internal-paths-cons (a x)
  (declare (xargs :guard t))
  (mbe :logic (extend-internal-paths a x)
       :exec (reverse (extend-internal-paths-exec-cons a x nil))))

Theorem: cons-listp-of-extend-internal-paths

(defthm cons-listp-of-extend-internal-paths
  (cons-listp (extend-internal-paths a x)))

Theorem: len-extend-internal-paths

(defthm len-extend-internal-paths
  (equal (len (extend-internal-paths u lst))
         (len lst)))