Get the lsb field from a svex-select-part.
(svex-select-part->lsb x) → lsb
This is an ordinary field accessor created by defprod.
Function:
(defun svex-select-part->lsb$inline (x) (declare (xargs :guard (svex-select-p x))) (declare (xargs :guard (equal (svex-select-kind x) :part))) (let ((__function__ 'svex-select-part->lsb)) (declare (ignorable __function__)) (mbe :logic (b* ((x (and (equal (svex-select-kind x) :part) x))) (svex-fix (std::prod-car (cdr x)))) :exec (std::prod-car (cdr x)))))
Theorem:
(defthm svex-p-of-svex-select-part->lsb (b* ((lsb (svex-select-part->lsb$inline x))) (svex-p lsb)) :rule-classes :rewrite)
Theorem:
(defthm svex-select-part->lsb$inline-of-svex-select-fix-x (equal (svex-select-part->lsb$inline (svex-select-fix x)) (svex-select-part->lsb$inline x)))
Theorem:
(defthm svex-select-part->lsb$inline-svex-select-equiv-congruence-on-x (implies (svex-select-equiv x x-equiv) (equal (svex-select-part->lsb$inline x) (svex-select-part->lsb$inline x-equiv))) :rule-classes :congruence)
Theorem:
(defthm svex-select-part->lsb-when-wrong-kind (implies (not (equal (svex-select-kind x) :part)) (equal (svex-select-part->lsb x) (svex-fix nil))))