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Segment-driver

Segment-driver-p

Recognizer for segment-driver structures.

Signature
(segment-driver-p x) → *

Definitions and Theorems

Function: segment-driver-p

(defun segment-driver-p (x)
  (declare (xargs :guard t))
  (let ((__function__ 'segment-driver-p))
    (declare (ignorable __function__))
    (and (std::prod-consp x)
         (std::prod-consp (std::prod-car x))
         (std::prod-consp (std::prod-cdr x))
         (b* ((lsb (std::prod-car (std::prod-car x)))
              (width (std::prod-cdr (std::prod-car x)))
              (value (std::prod-car (std::prod-cdr x)))
              (strength (std::prod-cdr (std::prod-cdr x))))
           (and (natp lsb)
                (posp width)
                (svex-p value)
                (natp strength))))))

Theorem: consp-when-segment-driver-p

(defthm consp-when-segment-driver-p
  (implies (segment-driver-p x) (consp x))
  :rule-classes :compound-recognizer)