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Representation-of-integer-conversions

Slong-from-uchar

Convert from type unsigned char to type signed long.

Signature
(slong-from-uchar x) → result
Arguments: x — Guard (ucharp x).
Returns: result — Type (slongp result).

Definitions and Theorems

Function: slong-from-uchar

(defun slong-from-uchar (x)
  (declare (xargs :guard (ucharp x)))
  (declare (xargs :guard (slong-from-uchar-okp x)))
  (let ((__function__ 'slong-from-uchar))
    (declare (ignorable __function__))
    (slong-from-integer (integer-from-uchar x))))

Theorem: slongp-of-slong-from-uchar

(defthm slongp-of-slong-from-uchar
  (b* ((result (slong-from-uchar x)))
    (slongp result))
  :rule-classes :rewrite)

Theorem: slong-from-uchar-of-uchar-fix-x

(defthm slong-from-uchar-of-uchar-fix-x
  (equal (slong-from-uchar (uchar-fix x))
         (slong-from-uchar x)))

Theorem: slong-from-uchar-uchar-equiv-congruence-on-x

(defthm slong-from-uchar-uchar-equiv-congruence-on-x
  (implies (uchar-equiv x x-equiv)
           (equal (slong-from-uchar x)
                  (slong-from-uchar x-equiv)))
  :rule-classes :congruence)