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• Fgl-function-mode

Fgl-function-mode-p

Recognizer for fgl-function-mode bit structures.

Signature

(fgl-function-mode-p x) → *

Definitions and Theorems

Function: fgl-function-mode-p

(defun fgl-function-mode-p (x)
  (declare (xargs :guard t))
  (let ((__function__ 'fgl-function-mode-p))
    (declare (ignorable __function__))
    (mbe :logic (unsigned-byte-p 6 x)
         :exec (and (natp x) (< x 64)))))

Theorem: fgl-function-mode-p-when-unsigned-byte-p

(defthm fgl-function-mode-p-when-unsigned-byte-p
  (implies (unsigned-byte-p 6 x)
           (fgl-function-mode-p x)))

Theorem: unsigned-byte-p-when-fgl-function-mode-p

(defthm unsigned-byte-p-when-fgl-function-mode-p
  (implies (fgl-function-mode-p x)
           (unsigned-byte-p 6 x)))

Theorem: fgl-function-mode-p-compound-recognizer

(defthm fgl-function-mode-p-compound-recognizer
  (implies (fgl-function-mode-p x)
           (natp x))
  :rule-classes :compound-recognizer)