Access the |X86ISA|::|ATTR| field of a hidden-segment-registerbits bit structure.
(hidden-segment-registerbits->attr x) → attr
Function:
(defun hidden-segment-registerbits->attr$inline (x) (declare (xargs :guard (hidden-segment-registerbits-p x))) (mbe :logic (let ((x (hidden-segment-registerbits-fix x))) (part-select x :low 96 :width 16)) :exec (the (unsigned-byte 16) (logand (the (unsigned-byte 16) 65535) (the (unsigned-byte 16) (ash (the (unsigned-byte 112) x) -96))))))
Theorem:
(defthm 16bits-p-of-hidden-segment-registerbits->attr (b* ((attr (hidden-segment-registerbits->attr$inline x))) (16bits-p attr)) :rule-classes :rewrite)
Theorem:
(defthm hidden-segment-registerbits->attr$inline-of-hidden-segment-registerbits-fix-x (equal (hidden-segment-registerbits->attr$inline (hidden-segment-registerbits-fix x)) (hidden-segment-registerbits->attr$inline x)))
Theorem:
(defthm hidden-segment-registerbits->attr$inline-hidden-segment-registerbits-equiv-congruence-on-x (implies (hidden-segment-registerbits-equiv x x-equiv) (equal (hidden-segment-registerbits->attr$inline x) (hidden-segment-registerbits->attr$inline x-equiv))) :rule-classes :congruence)
Theorem:
(defthm hidden-segment-registerbits->attr-of-hidden-segment-registerbits (equal (hidden-segment-registerbits->attr (hidden-segment-registerbits base-addr limit attr)) (16bits-fix attr)))
Theorem:
(defthm hidden-segment-registerbits->attr-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) 5192217630372313364192902785269760) 0)) (equal (hidden-segment-registerbits->attr x) (hidden-segment-registerbits->attr y))))