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• Linear-memory-in-app-view

Wvm256

Signature

(wvm256 addr val x86) → (mv * x86)

Definitions and Theorems

Function: wvm256$inline

(defun wvm256$inline (addr val x86)
 (declare (xargs :stobjs (x86)))
 (declare (type (signed-byte 48) addr)
          (type (unsigned-byte 256) val))
 (if
  (mbt (canonical-address-p addr))
  (let* ((16+addr (the (signed-byte 49)
                       (+ 16 (the (signed-byte 48) addr))))
         (31+addr (the (signed-byte 49)
                       (+ 31 (the (signed-byte 48) addr)))))
   (if
    (mbe :logic (canonical-address-p 31+addr)
         :exec (< (the (signed-byte 49) 31+addr)
                  140737488355328))
    (b*
     ((oword0
          (mbe :logic (part-select val :low 0 :width 128)
               :exec (logand 340282366920938463463374607431768211455
                             val)))
      (oword1
          (mbe :logic (part-select val :low 128 :width 128)
               :exec (logand 340282366920938463463374607431768211455
                             (ash val -128))))
      ((mv flg0 x86) (wvm128 addr oword0 x86))
      ((mv flg1 x86)
       (wvm128 16+addr oword1 x86)))
     (mbe :logic
          (if (or flg0 flg1)
              (mv 'wvm256 x86)
            (mv nil x86))
          :exec (mv nil x86)))
    (mv 'wvm256 x86)))
  (mv 'wvm256 x86)))

Theorem: wvm256-no-error

(defthm wvm256-no-error
  (implies (and (canonical-address-p addr)
                (canonical-address-p (+ 31 addr)))
           (equal (mv-nth 0 (wvm256 addr val x86))
                  nil)))

Theorem: x86p-mv-nth-1-wvm256

(defthm x86p-mv-nth-1-wvm256
  (implies (x86p x86)
           (x86p (mv-nth 1 (wvm256 addr val x86))))
  :rule-classes (:type-prescription :rewrite))

Theorem: xr-wmv256-app-view

(defthm xr-wmv256-app-view
  (implies (not (equal fld :mem))
           (equal (xr fld
                      index (mv-nth 1 (wvm256 addr val x86)))
                  (xr fld index x86))))

Theorem: wvm256-xw-app-view

(defthm wvm256-xw-app-view
 (implies
     (not (equal fld :mem))
     (and (equal (mv-nth 0
                         (wvm256 addr val (xw fld index value x86)))
                 (mv-nth 0 (wvm256 addr val x86)))
          (equal (mv-nth 1
                         (wvm256 addr val (xw fld index value x86)))
                 (xw fld index value
                     (mv-nth 1 (wvm256 addr val x86)))))))