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• Linear-memory

Wml32

Signature

(wml32 lin-addr val x86) → (mv * x86)

Definitions and Theorems

Theorem: wb-and-wvm32

(defthm wb-and-wvm32
  (implies (and (app-view x86)
                (canonical-address-p lin-addr)
                (canonical-address-p (+ 3 lin-addr)))
           (equal (wvm32 lin-addr val x86)
                  (wb 4 lin-addr :w val x86))))

Function: wml32

(defun wml32 (lin-addr val x86)
 (declare (xargs :stobjs (x86)))
 (declare (type (signed-byte 48) lin-addr)
          (type (unsigned-byte 32) val))
 (declare (xargs :guard (canonical-address-p lin-addr)))
 (let ((__function__ 'wml32))
  (declare (ignorable __function__))
  (if
   (mbt (canonical-address-p lin-addr))
   (let* ((3+lin-addr (the (signed-byte 49)
                           (+ 3 (the (signed-byte 48) lin-addr)))))
    (if
     (mbe :logic (canonical-address-p 3+lin-addr)
          :exec (< (the (signed-byte 49) 3+lin-addr)
                   140737488355328))
     (mbe
      :logic (wb 4 lin-addr :w val x86)
      :exec
      (if (app-view x86)
          (wvm32 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))
            ((the (signed-byte 49) 1+lin-addr)
             (+ 1 lin-addr))
            ((mv flag (the (unsigned-byte 52) p-addr1)
                 x86)
             (la-to-pa 1+lin-addr :w x86))
            ((when flag) (mv flag x86))
            (2+lin-addr (the (signed-byte 50)
                             (+ 2 (the (signed-byte 48) lin-addr))))
            ((mv flag (the (unsigned-byte 52) p-addr2)
                 x86)
             (la-to-pa 2+lin-addr :w x86))
            ((when flag) (mv flag x86))
            (3+lin-addr (the (signed-byte 51)
                             (+ 3 (the (signed-byte 48) lin-addr))))
            ((mv flag (the (unsigned-byte 52) p-addr3)
                 x86)
             (la-to-pa 3+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)))))
            (byte2 (mbe :logic (part-select val :low 16 :width 8)
                        :exec (the (unsigned-byte 8)
                                   (logand 255 (ash val -16)))))
            (byte3 (mbe :logic (part-select val :low 24 :width 8)
                        :exec (the (unsigned-byte 8)
                                   (logand 255 (ash val -24)))))
            (x86 (!memi p-addr0 byte0 x86))
            (x86 (!memi p-addr1 byte1 x86))
            (x86 (!memi p-addr2 byte2 x86))
            (x86 (!memi p-addr3 byte3 x86)))
         (mv nil x86))))
     (mv 'wml32 x86)))
   (mv 'wml32 x86))))

Theorem: x86p-wml32

(defthm x86p-wml32
  (implies (force (x86p x86))
           (x86p (mv-nth 1 (wml32 lin-addr val x86))))
  :rule-classes (:rewrite :type-prescription))