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Constants-conversions-and-bounds

N48-to-i48

Signature
(n48-to-i48 x) → *
Arguments: x — Guard (n48p x).

Definitions and Theorems

Function: n48-to-i48$inline

(defun n48-to-i48$inline (x)
  (declare (type (unsigned-byte 48) x))
  (declare (xargs :guard (n48p x)))
  (mbe :logic (logext 48 x)
       :exec
       (if (< x 140737488355328)
           x
         (- x 281474976710656))))