		Search-engine friendly clone of the ACL2 documentation.

One-byte-opcodes

X86-near-jmp-op/en-d

Signature
(x86-near-jmp-op/en-d proc-mode start-rip temp-rip prefixes rex-byte opcode modr/m sib x86) → x86
Returns: x86 — Type (x86p x86), given (x86p x86).

Definitions and Theorems

Function: x86-near-jmp-op/en-d

(defun x86-near-jmp-op/en-d
       (proc-mode start-rip temp-rip
                  prefixes 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) rex-byte)
          (type (unsigned-byte 8) opcode)
          (type (unsigned-byte 8) modr/m)
          (type (unsigned-byte 8) sib))
 (declare (ignorable proc-mode start-rip temp-rip
                     prefixes rex-byte opcode modr/m sib))
 (declare (xargs :guard (and (prefixes-p prefixes)
                             (modr/m-p modr/m)
                             (sib-p sib)
                             (rip-guard-okp proc-mode temp-rip))))
 (let ((__function__ 'x86-near-jmp-op/en-d))
  (declare (ignorable __function__))
  (b* ((?ctx 'x86-near-jmp-op/en-d))
   (b* ((byte-operand? (eql opcode 235))
        ((the (integer 0 4) offset-size)
         (select-operand-size proc-mode byte-operand?
                              rex-byte nil prefixes nil t t x86))
        ((mv ?flg (the (signed-byte 32) offset)
             x86)
         (rime-size proc-mode
                    offset-size temp-rip 1 :x nil x86))
        ((when flg)
         (!!ms-fresh :rime-size-error flg))
        ((mv flg next-rip)
         (add-to-*ip proc-mode
                     temp-rip (the (integer 0 4) offset-size)
                     x86))
        ((when flg)
         (!!ms-fresh :rip-increment-error flg))
        (badlength? (check-instruction-length start-rip next-rip 0))
        ((when badlength?)
         (!!fault-fresh :gp 0
                        :instruction-length badlength?))
        ((mv flg temp-rip)
         (add-to-*ip proc-mode next-rip offset x86))
        ((when flg)
         (!!ms-fresh :virtual-memory-error temp-rip))
        (temp-rip (if (eql offset-size 2)
                      (logand 65535 temp-rip)
                    temp-rip))
        (x86 (write-*ip proc-mode temp-rip x86)))
     x86))))

Theorem: x86p-of-x86-near-jmp-op/en-d

(defthm x86p-of-x86-near-jmp-op/en-d
 (implies
  (x86p x86)
  (b*
   ((x86 (x86-near-jmp-op/en-d proc-mode start-rip temp-rip prefixes
                               rex-byte opcode modr/m sib x86)))
   (x86p x86)))
 :rule-classes :rewrite)