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• Linear-memory-in-app-view

Wvm80

Signature

(wvm80 addr val x86) → (mv * x86)

Definitions and Theorems

Function: wvm80$inline

(defun wvm80$inline (addr val x86)
 (declare (xargs :stobjs (x86)))
 (declare (type (signed-byte 48) addr)
          (type (unsigned-byte 80) val))
 (if
  (mbt (canonical-address-p addr))
  (let* ((2+addr (the (signed-byte 49)
                      (+ 2 (the (signed-byte 48) addr))))
         (9+addr (the (signed-byte 49)
                      (+ 9 (the (signed-byte 48) addr)))))
    (if
     (mbe :logic (canonical-address-p 9+addr)
          :exec (< (the (signed-byte 49) 9+addr)
                   140737488355328))
     (b*
      ((word0 (mbe :logic (part-select val :low 0 :width 16)
                   :exec (logand 65535 val)))
       (qword1
            (mbe :logic (part-select val :low 16 :width 64)
                 :exec (logand 18446744073709551615 (ash val -16))))
       ((mv flg0 x86) (wvm16 addr word0 x86))
       ((mv flg1 x86)
        (wvm64 2+addr qword1 x86)))
      (mbe :logic
           (if (or flg0 flg1)
               (mv 'wvm80 x86)
             (mv nil x86))
           :exec (mv nil x86)))
     (mv 'wvm80 x86)))
  (mv 'wvm80 x86)))

Theorem: wvm80-no-error

(defthm wvm80-no-error
  (implies (and (canonical-address-p addr)
                (canonical-address-p (+ 9 addr)))
           (equal (mv-nth 0 (wvm80 addr val x86))
                  nil)))

Theorem: x86p-mv-nth-1-wvm80

(defthm x86p-mv-nth-1-wvm80
  (implies (x86p x86)
           (x86p (mv-nth 1 (wvm80 addr val x86))))
  :rule-classes (:type-prescription :rewrite))

Theorem: xr-wmv80-app-view

(defthm xr-wmv80-app-view
  (implies (not (equal fld :mem))
           (equal (xr fld
                      index (mv-nth 1 (wvm80 addr val x86)))
                  (xr fld index x86))))

Theorem: wvm80-xw-app-view

(defthm wvm80-xw-app-view
 (implies
      (not (equal fld :mem))
      (and (equal (mv-nth 0
                          (wvm80 addr val (xw fld index value x86)))
                  (mv-nth 0 (wvm80 addr val x86)))
           (equal (mv-nth 1
                          (wvm80 addr val (xw fld index value x86)))
                  (xw fld index value
                      (mv-nth 1 (wvm80 addr val x86)))))))