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Constants-conversions-and-bounds

N59-to-i59

Signature
(n59-to-i59 x) → *
Arguments: x — Guard (n59p x).

Definitions and Theorems

Function: n59-to-i59$inline

(defun n59-to-i59$inline (x)
  (declare (type (unsigned-byte 59) x))
  (declare (xargs :guard (n59p x)))
  (mbe :logic (logext 59 x)
       :exec
       (if (< x 288230376151711744)
           x
         (- x 576460752303423488))))