Access the |X86ISA|::|LIMIT| field of a hidden-segment-registerbits bit structure.
(hidden-segment-registerbits->limit x) → limit
Function:
(defun hidden-segment-registerbits->limit$inline (x) (declare (xargs :guard (hidden-segment-registerbits-p x))) (mbe :logic (let ((x (hidden-segment-registerbits-fix x))) (part-select x :low 64 :width 32)) :exec (the (unsigned-byte 32) (logand (the (unsigned-byte 32) 4294967295) (the (unsigned-byte 48) (ash (the (unsigned-byte 112) x) -64))))))
Theorem:
(defthm 32bits-p-of-hidden-segment-registerbits->limit (b* ((limit (hidden-segment-registerbits->limit$inline x))) (32bits-p limit)) :rule-classes :rewrite)
Theorem:
(defthm hidden-segment-registerbits->limit$inline-of-hidden-segment-registerbits-fix-x (equal (hidden-segment-registerbits->limit$inline (hidden-segment-registerbits-fix x)) (hidden-segment-registerbits->limit$inline x)))
Theorem:
(defthm hidden-segment-registerbits->limit$inline-hidden-segment-registerbits-equiv-congruence-on-x (implies (hidden-segment-registerbits-equiv x x-equiv) (equal (hidden-segment-registerbits->limit$inline x) (hidden-segment-registerbits->limit$inline x-equiv))) :rule-classes :congruence)
Theorem:
(defthm hidden-segment-registerbits->limit-of-hidden-segment-registerbits (equal (hidden-segment-registerbits->limit (hidden-segment-registerbits base-addr limit attr)) (32bits-fix limit)))
Theorem:
(defthm hidden-segment-registerbits->limit-of-write-with-mask (implies (and (fty::bitstruct-read-over-write-hyps x hidden-segment-registerbits-equiv-under-mask) (hidden-segment-registerbits-equiv-under-mask x y fty::mask) (equal (logand (lognot fty::mask) 79228162495817593519834398720) 0)) (equal (hidden-segment-registerbits->limit x) (hidden-segment-registerbits->limit y))))