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• Ror-spec

Ror-spec-8

Signature

(ror-spec-8 dst src input-rflags) → (mv * * *)

Arguments

src — Note that src is masked appropriately by the caller of this function.

Definitions and Theorems

Function: ror-spec-8

(defun ror-spec-8 (dst src input-rflags)
 (declare (type (unsigned-byte 8) dst)
          (type (unsigned-byte 6) src)
          (type (unsigned-byte 32) input-rflags))
 (let ((__function__ 'ror-spec-8))
  (declare (ignorable __function__))
  (b*
   ((dst (mbe :logic (n-size 8 dst) :exec dst))
    (src (mbe :logic (n-size 6 src) :exec src))
    (input-rflags (mbe :logic (n32 input-rflags)
                       :exec input-rflags))
    (result (mbe :logic (n-size 8
                                (the (unsigned-byte 8)
                                     (fast-rotate-right dst 8 src)))
                 :exec (the (unsigned-byte 8)
                            (fast-rotate-right dst 8 src))))
    ((mv (the (unsigned-byte 32) output-rflags)
         (the (unsigned-byte 32)
              undefined-flags))
     (case src
      (0 (b* ((undefined-flags (the (unsigned-byte 32)
                                    (!rflagsbits->of 1 0))))
           (mv input-rflags undefined-flags)))
      (1
       (b*
        ((cf
          (mbe
              :logic (logbit 7 result)
              :exec (logand 1
                            (the (unsigned-byte 1)
                                 (ash (the (unsigned-byte 8) result)
                                      -7)))))
         (of
          (b-xor
           (mbe
              :logic (logbit 7 result)
              :exec (logand 1
                            (the (unsigned-byte 1)
                                 (ash (the (unsigned-byte 8) result)
                                      -7))))
           (mbe
              :logic (part-select result :low 6 :width 1)
              :exec (logand 1
                            (the (unsigned-byte 2)
                                 (ash (the (unsigned-byte 8) result)
                                      -6))))))
         (output-rflags
          (mbe
           :logic (change-rflagsbits input-rflags
                                     :cf cf
                                     :of of)
           :exec
           (the
             (unsigned-byte 32)
             (!rflagsbits->cf cf
                              (!rflagsbits->of of input-rflags))))))
        (mv output-rflags 0)))
      (otherwise
       (b*
        ((cf
          (mbe
              :logic (logbit 7 result)
              :exec (logand 1
                            (the (unsigned-byte 1)
                                 (ash (the (unsigned-byte 8) result)
                                      -7)))))
         (output-rflags (the (unsigned-byte 32)
                             (!rflagsbits->cf cf input-rflags)))
         (undefined-flags (the (unsigned-byte 32)
                               (!rflagsbits->of 1 0))))
        (mv output-rflags undefined-flags)))))
    (output-rflags (mbe :logic (n32 output-rflags)
                        :exec output-rflags)))
   (mv result output-rflags undefined-flags))))

Theorem: n08-mv-nth-0-ror-spec-8

(defthm n08-mv-nth-0-ror-spec-8
 (unsigned-byte-p 8
                  (mv-nth 0 (ror-spec-8 dst src input-rflags)))
 :rule-classes
 (:rewrite
  (:type-prescription
      :corollary (natp (mv-nth 0 (ror-spec-8 dst src input-rflags)))
      :hints
      (("Goal" :in-theory '(unsigned-byte-p integer-range-p natp))))
  (:linear
   :corollary (and (<= 0
                       (mv-nth 0 (ror-spec-8 dst src input-rflags)))
                   (< (mv-nth 0 (ror-spec-8 dst src input-rflags))
                      256))
   :hints
   (("Goal"
        :in-theory '(unsigned-byte-p integer-range-p (:e expt)))))))

Theorem: mv-nth-1-ror-spec-8

(defthm mv-nth-1-ror-spec-8
 (unsigned-byte-p 32
                  (mv-nth 1 (ror-spec-8 dst src input-rflags)))
 :rule-classes
 (:rewrite
  (:type-prescription
      :corollary (natp (mv-nth 1 (ror-spec-8 dst src input-rflags)))
      :hints
      (("Goal" :in-theory '(unsigned-byte-p integer-range-p natp))))
  (:linear
   :corollary (and (<= 0
                       (mv-nth 1 (ror-spec-8 dst src input-rflags)))
                   (< (mv-nth 1 (ror-spec-8 dst src input-rflags))
                      4294967296))
   :hints
   (("Goal"
        :in-theory '(unsigned-byte-p integer-range-p (:e expt)))))))

Theorem: mv-nth-2-ror-spec-8

(defthm mv-nth-2-ror-spec-8
 (unsigned-byte-p 32
                  (mv-nth 2 (ror-spec-8 dst src input-rflags)))
 :rule-classes
 (:rewrite
  (:type-prescription
      :corollary (natp (mv-nth 2 (ror-spec-8 dst src input-rflags)))
      :hints
      (("Goal" :in-theory '(unsigned-byte-p integer-range-p natp))))
  (:linear
   :corollary (and (<= 0
                       (mv-nth 2 (ror-spec-8 dst src input-rflags)))
                   (< (mv-nth 2 (ror-spec-8 dst src input-rflags))
                      4294967296))
   :hints
   (("Goal"
        :in-theory '(unsigned-byte-p integer-range-p (:e expt)))))))