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Uchar-format

Uchar-format->size

Get the size field from a uchar-format.

Signature
(uchar-format->size x) → size
Arguments: x — Guard (uchar-formatp x).
Returns: size — Type (natp size).

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

Definitions and Theorems

Function: uchar-format->size$inline

(defun uchar-format->size$inline (x)
  (declare (xargs :guard (uchar-formatp x)))
  (declare (xargs :guard t))
  (mbe :logic
       (b* ((x (and t x))
            (size (nfix (cdr (std::da-nth 0 x)))))
         (if (>= size 8) size 8))
       :exec (cdr (std::da-nth 0 x))))

Theorem: natp-of-uchar-format->size

(defthm natp-of-uchar-format->size
  (b* ((size (uchar-format->size$inline x)))
    (natp size))
  :rule-classes :rewrite)

Theorem: uchar-format->size$inline-of-uchar-format-fix-x

(defthm uchar-format->size$inline-of-uchar-format-fix-x
  (equal (uchar-format->size$inline (uchar-format-fix x))
         (uchar-format->size$inline x)))

Theorem: uchar-format->size$inline-uchar-format-equiv-congruence-on-x

(defthm uchar-format->size$inline-uchar-format-equiv-congruence-on-x
  (implies (uchar-format-equiv x x-equiv)
           (equal (uchar-format->size$inline x)
                  (uchar-format->size$inline x-equiv)))
  :rule-classes :congruence)