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Bed-op-p

Bed-op-fix

Fixing function for bed-op-ps.

Signature
(bed-op-fix x) → op
Returns: op — Type (bed-op-p op).

Definitions and Theorems

Function: bed-op-fix$inline

(defun bed-op-fix$inline (x)
  (declare (xargs :guard t))
  (let ((__function__ 'bed-op-fix))
    (declare (ignorable __function__))
    (the (unsigned-byte 4)
         (logand 15 (the integer (ifix x))))))

Theorem: bed-op-p-of-bed-op-fix

(defthm bed-op-p-of-bed-op-fix
  (b* ((op (bed-op-fix$inline x)))
    (bed-op-p op))
  :rule-classes :rewrite)

Theorem: bed-op-fix-when-bed-op-p

(defthm bed-op-fix-when-bed-op-p
  (implies (bed-op-p x)
           (equal (bed-op-fix x) x)))