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• Linear-memory

Wml16

Signature

(wml16 lin-addr val x86) → (mv * x86)

Definitions and Theorems

Theorem: wb-and-wvm16

(defthm wb-and-wvm16
  (implies (and (app-view x86)
                (canonical-address-p lin-addr)
                (canonical-address-p (1+ lin-addr)))
           (equal (wvm16 lin-addr val x86)
                  (wb 2 lin-addr :w val x86))))

Function: wml16

(defun wml16 (lin-addr val x86)
 (declare (xargs :stobjs (x86)))
 (declare (type (signed-byte 48) lin-addr)
          (type (unsigned-byte 16) val))
 (declare (xargs :split-types t
                 :guard (and (canonical-address-p lin-addr)
                             (unsigned-byte-p 16 val))))
 (let ((__function__ 'wml16))
  (declare (ignorable __function__))
  (if
   (mbt (canonical-address-p lin-addr))
   (let* ((1+lin-addr (the (signed-byte 49)
                           (1+ (the (signed-byte 48) lin-addr)))))
    (if
     (mbe :logic (canonical-address-p 1+lin-addr)
          :exec (< (the (signed-byte 49) 1+lin-addr)
                   140737488355328))
     (mbe
         :logic (wb 2 lin-addr :w val x86)
         :exec
         (if (app-view x86)
             (wvm16 lin-addr val x86)
           (b* (((mv flag (the (unsigned-byte 52) p-addr0)
                     x86)
                 (la-to-pa lin-addr :w x86))
                ((when flag) (mv flag x86))
                ((mv flag (the (unsigned-byte 52) p-addr1)
                     x86)
                 (la-to-pa 1+lin-addr :w x86))
                ((when flag) (mv flag x86))
                (byte0 (mbe :logic (part-select val :low 0 :width 8)
                            :exec (the (unsigned-byte 8)
                                       (logand 255 val))))
                (byte1 (mbe :logic (part-select val :low 8 :width 8)
                            :exec (the (unsigned-byte 8)
                                       (logand 255 (ash val -8)))))
                (x86 (!memi p-addr0 byte0 x86))
                (x86 (!memi p-addr1 byte1 x86)))
             (mv nil x86))))
     (mv 'wml16 x86)))
   (mv 'wml16 x86))))

Theorem: x86p-wml16

(defthm x86p-wml16
  (implies (force (x86p x86))
           (x86p (mv-nth 1 (wml16 lin-addr val x86))))
  :rule-classes (:rewrite :type-prescription))