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Feat-endian

Feat-endian-kind

Get the kind (tag) of a feat-endian structure.

Signature
(feat-endian-kind x) → kind
Arguments: x — Guard (feat-endianp x).

Definitions and Theorems

Function: feat-endian-kind$inline

(defun feat-endian-kind$inline (x)
  (declare (xargs :guard (feat-endianp x)))
  (let ((__function__ 'feat-endian-kind))
    (declare (ignorable __function__))
    (mbe :logic (cond ((or (atom x) (eq (car x) :little))
                       :little)
                      (t :big))
         :exec (car x))))

Theorem: feat-endian-kind-possibilities

(defthm feat-endian-kind-possibilities
  (or (equal (feat-endian-kind x) :little)
      (equal (feat-endian-kind x) :big))
  :rule-classes
  ((:forward-chaining :trigger-terms ((feat-endian-kind x)))))