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Ienv

Ienv->short-bytes

Get the short-bytes field from a ienv.

Signature
(ienv->short-bytes x) → short-bytes
Arguments: x — Guard (ienvp x).
Returns: short-bytes — Type (posp short-bytes).

This is an ordinary field accessor created by fty::defprod.

Definitions and Theorems

Function: ienv->short-bytes$inline

(defun ienv->short-bytes$inline (x)
  (declare (xargs :guard (ienvp x)))
  (declare (xargs :guard t))
  (mbe :logic
       (b* ((x (and t x))
            (version (c::version-fix (cdr (std::da-nth 0 x))))
            (short-bytes (pos-fix (cdr (std::da-nth 1 x))))
            (int-bytes (pos-fix (cdr (std::da-nth 2 x))))
            (long-bytes (pos-fix (cdr (std::da-nth 3 x))))
            (llong-bytes (pos-fix (cdr (std::da-nth 4 x))))
            (plain-char-signedp (bool-fix (cdr (std::da-nth 5 x)))))
         (if (and (<= short-bytes int-bytes)
                  (<= int-bytes long-bytes)
                  (<= long-bytes llong-bytes)
                  (<= 2 short-bytes)
                  (<= 2 int-bytes)
                  (<= 4 long-bytes)
                  (<= 8 llong-bytes))
             short-bytes
           2))
       :exec (cdr (std::da-nth 1 x))))

Theorem: posp-of-ienv->short-bytes

(defthm posp-of-ienv->short-bytes
  (b* ((short-bytes (ienv->short-bytes$inline x)))
    (posp short-bytes))
  :rule-classes :rewrite)

Theorem: ienv->short-bytes$inline-of-ienv-fix-x

(defthm ienv->short-bytes$inline-of-ienv-fix-x
  (equal (ienv->short-bytes$inline (ienv-fix x))
         (ienv->short-bytes$inline x)))

Theorem: ienv->short-bytes$inline-ienv-equiv-congruence-on-x

(defthm ienv->short-bytes$inline-ienv-equiv-congruence-on-x
  (implies (ienv-equiv x x-equiv)
           (equal (ienv->short-bytes$inline x)
                  (ienv->short-bytes$inline x-equiv)))
  :rule-classes :congruence)