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• X86-decoder

Second-three-byte-opcode-execute

Second three-byte opcode dispatch function.

Signature

(second-three-byte-opcode-execute proc-mode start-rip 
                                  temp-rip prefixes mandatory-prefix 
                                  rex-byte opcode modr/m sib x86) 
 
  → 
x86

second-three-byte-opcode-execute is the doorway to the second three-byte opcode map, i.e., to all three-byte opcodes whose second two opcode bytes are 0F 3A.

Definitions and Theorems

Function: second-three-byte-opcode-execute

(defun
 second-three-byte-opcode-execute
 (proc-mode start-rip
            temp-rip prefixes mandatory-prefix
            rex-byte opcode modr/m sib x86)
 (declare (xargs :stobjs (x86)))
 (declare (type (integer 0 4) proc-mode)
          (type (signed-byte 48) start-rip)
          (type (signed-byte 48) temp-rip)
          (type (unsigned-byte 52) prefixes)
          (type (unsigned-byte 8)
                mandatory-prefix)
          (type (unsigned-byte 8) rex-byte)
          (type (unsigned-byte 8) opcode)
          (type (unsigned-byte 8) modr/m)
          (type (unsigned-byte 8) sib))
 (case
  opcode
  (8
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-2 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (9
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-2 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (10
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-3 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (11
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-3 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (12
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-4 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (13
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-4 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (14
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-4 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (15
   (cond
    ((equal mandatory-prefix 0)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-4 (:ssse3)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:ssse3))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-4 (:ssse3)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:ssse3))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (20
   (cond
    ((and (not (equal (modr/m->mod modr/m) 3))
          (equal mandatory-prefix 102))
     (let
      ((fault-var (let ((chk-ex (or (chk-exc :type-5 (:avx2)))))
                       (or chk-ex nil))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    ((and (equal (modr/m->mod modr/m) 3)
          (equal mandatory-prefix 102))
     (let
      ((fault-var (let ((chk-ex (or (chk-exc :type-5 (:avx2)))))
                       (or chk-ex nil))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (21
   (cond
    ((and (not (equal (modr/m->mod modr/m) 3))
          (equal mandatory-prefix 102))
     (let
      ((fault-var (let ((chk-ex (or (chk-exc :type-5 (:avx2)))))
                       (or chk-ex nil))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    ((and (equal (modr/m->mod modr/m) 3)
          (equal mandatory-prefix 102))
     (let
      ((fault-var (let ((chk-ex (or (chk-exc :type-5 (:avx2)))))
                       (or chk-ex nil))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (22
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-5 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (23
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-5 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (32
   (cond
    ((and (equal (modr/m->mod modr/m) 3)
          (equal mandatory-prefix 102))
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-5 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    ((and (not (equal (modr/m->mod modr/m) 3))
          (equal mandatory-prefix 102))
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-5 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (33
   (cond
    ((and (not (equal (modr/m->mod modr/m) 3))
          (equal mandatory-prefix 102))
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-5 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    ((and (equal (modr/m->mod modr/m) 3)
          (equal mandatory-prefix 102))
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-5 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (34
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-5 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (64
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-2 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (65
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-2 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (66
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-4 (:sse4.1)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.1))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (68
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
         (let ((chk-ex (or (chk-exc :type-4 (:pclmulqdq)))))
              (or chk-ex
                  (if (or (equal (feature-flags-macro '(:pclmulqdq))
                                 0))
                      ':ud
                      nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (96
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-4 (:sse4.2)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.2))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (97
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-4 (:sse4.2)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.2))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (98
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-4 (:sse4.2)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.2))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (99
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
            (let ((chk-ex (or (chk-exc :type-4 (:sse4.2)))))
                 (or chk-ex
                     (if (or (equal (feature-flags-macro '(:sse4.2))
                                    0))
                         ':ud
                         nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (204
   (let
    ((fault-var
          (let ((chk-ex (or (chk-exc :type-4 (:sha)))))
               (or chk-ex
                   (if (or (equal (feature-flags-macro '(:sha)) 0))
                       ':ud
                       nil)))))
    (if
     fault-var
     (case
      fault-var
      (:ud (x86-illegal-instruction "#UD Encountered!"
                                    start-rip temp-rip x86))
      (:gp (x86-general-protection "#GP Encountered!"
                                   start-rip temp-rip x86))
      (:nm (x86-device-not-available "#NM Encountered!"
                                     start-rip temp-rip x86))
      (t
        (x86-step-unimplemented "Unimplemented exception in x86isa!"
                                x86)))
     (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                             x86))))
  (223
   (cond
    ((equal mandatory-prefix 102)
     (let
      ((fault-var
           (let ((chk-ex (or (chk-exc :type-4 (:aes)))))
                (or chk-ex
                    (if (or (equal (feature-flags-macro '(:aes)) 0))
                        ':ud
                        nil)))))
      (if
       fault-var
       (case fault-var
             (:ud (x86-illegal-instruction "#UD Encountered!"
                                           start-rip temp-rip x86))
             (:gp (x86-general-protection "#GP Encountered!"
                                          start-rip temp-rip x86))
             (:nm (x86-device-not-available "#NM Encountered!"
                                            start-rip temp-rip x86))
             (t (x86-step-unimplemented
                     "Unimplemented exception in x86isa!"
                     x86)))
       (x86-step-unimplemented "Opcode Unimplemented in x86isa!"
                               x86))))
    (t (x86-illegal-instruction "#UD Encountered!"
                                start-rip temp-rip x86))))
  (t (x86-illegal-instruction "#UD Encountered!"
                              start-rip temp-rip x86))))

Theorem: x86p-second-three-byte-opcode-execute

(defthm x86p-second-three-byte-opcode-execute
        (implies (x86p x86)
                 (x86p (second-three-byte-opcode-execute
                            proc-mode start-rip
                            temp-rip prefixes mandatory-prefix
                            rex-byte opcode modr/m sib x86))))