Get the signed field from a schar-format.
(schar-format->signed x) → signed
This is an ordinary field accessor created by fty::defprod.
Function:
(defun schar-format->signed$inline (x) (declare (xargs :guard (schar-formatp x))) (declare (xargs :guard t)) (let ((__function__ 'schar-format->signed)) (declare (ignorable __function__)) (mbe :logic (b* ((x (and t x))) (signed-format-fix (cdr (std::da-nth 0 x)))) :exec (cdr (std::da-nth 0 x)))))
Theorem:
(defthm signed-formatp-of-schar-format->signed (b* ((signed (schar-format->signed$inline x))) (signed-formatp signed)) :rule-classes :rewrite)
Theorem:
(defthm schar-format->signed$inline-of-schar-format-fix-x (equal (schar-format->signed$inline (schar-format-fix x)) (schar-format->signed$inline x)))
Theorem:
(defthm schar-format->signed$inline-schar-format-equiv-congruence-on-x (implies (schar-format-equiv x x-equiv) (equal (schar-format->signed$inline x) (schar-format->signed$inline x-equiv))) :rule-classes :congruence)