[Nasm-bugs] [Bug 3392642] New: Opcodes 83h /1, /4 and /6 ib are only available on 386 and newer.

noreply-nasm at dev.nasm.us noreply-nasm at dev.nasm.us
Thu Jan 2 09:05:00 PST 2020


https://bugzilla.nasm.us/show_bug.cgi?id=3392642

            Bug ID: 3392642
           Summary: Opcodes 83h /1, /4 and /6 ib are only available on 386
                    and newer.
           Product: NASM
           Version: 2.14.xx
          Hardware: PC
                OS: Windows
            Status: OPEN
          Severity: severe
          Priority: Medium
         Component: Assembler
          Assignee: nobody at nasm.us
          Reporter: ignas.ziberkas at gmail.com
                CC: chang.seok.bae at intel.com, gorcunov at gmail.com,
                    hpa at zytor.com, nasm-bugs at nasm.us
     Obtained from: Binary from nasm.us, Build from git using other
                    Makefile

When 8086 is selected xor cx, 0xffff should be assembled into 81F1FFFF and not
83F1FF.

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