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    • One-byte-opcodes

    X86-pushf

    Signature
    (x86-pushf 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-pushf

    (defun x86-pushf (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-pushf))
      (declare (ignorable __function__))
      (b* ((?ctx 'x86-pushf))
        (b*
          (((the (integer 1 8) operand-size)
            (select-operand-size proc-mode
                                 nil rex-byte nil prefixes t t nil x86))
           (rsp (read-*sp proc-mode x86))
           ((mv flg new-rsp)
            (add-to-*sp proc-mode rsp (- operand-size)
                        x86))
           ((when flg)
            (!!fault-fresh :ss 0 :push flg))
           ((the (unsigned-byte 32) eflags)
            (rflags x86))
           ((the (unsigned-byte 32) eflags)
            (case operand-size
              (2 (logand 65535 eflags))
              (otherwise (logand 3997695 eflags))))
           ((mv flg x86)
            (wme-size-opt proc-mode operand-size
                          (the (signed-byte 48) new-rsp)
                          2 eflags
                          (alignment-checking-enabled-p x86)
                          x86
                          :mem-ptr? nil))
           ((when flg)
            (!!ms-fresh :wme-size-opt flg))
           (x86 (write-*sp proc-mode new-rsp x86))
           (x86 (write-*ip proc-mode temp-rip x86)))
          x86))))

    Theorem: x86p-of-x86-pushf

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