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Constants-conversions-and-bounds

N51-to-i51

Signature
(n51-to-i51 x) → *
Arguments: x — Guard (n51p x).

Definitions and Theorems

Function: n51-to-i51$inline

(defun n51-to-i51$inline (x)
  (declare (type (unsigned-byte 51) x))
  (declare (xargs :guard (n51p x)))
  (mbe :logic (logext 51 x)
       :exec
       (if (< x 1125899906842624)
           x
         (- x 2251799813685248))))