as/i386 all versions a bit too permissive with ins/outs/lods/stos

[Etienne Lorrain]

  Just for info, if someone has time:
  "ins" only possible with %[e]di
  "outs" only possible with %[e]si
  I did not find a version of "as" complaining, even if they
  analyse this part of the instruction for segment overwrite.

  The "89 F6" at end is just a nop.

etienne@Fulbert:~$ cat tmp.s
.text
        insw %dx,%es:(%edi)
        insw %dx,%es:(%esi)

        outsw %es:(%esi),%dx
        outsw %es:(%edi),%dx
etienne@Fulbert:~$ as tmp.s -al
GAS LISTING tmp.s                       page 1


   1                    .text
   2 0000 666D                  insw %dx,%es:(%edi)
   3 0002 666D                  insw %dx,%es:(%esi)
   4
   5 0004 66266F                outsw %es:(%esi),%dx
   6 0007 66266F89              outsw %es:(%edi),%dx
   6      F6
etienne@Fulbert:~$ as -v
GNU assembler version 2.12.90.0.1 (i386-linux) using BFD version 2.12.90.0.1

20020307 Debian/GNU Linux

etienne@Fulbert:~$


  -- etienne.


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