Glitches in gas/objdump handling of i386 STR, SLDT, SMSW instructions

[H . J . Lu]

On Mon, Nov 12, 2001 at 12:26:43PM +1030, Alan Modra wrote:
> On Sun, Nov 11, 2001 at 05:33:38PM -0800, Zack Weinberg wrote:
> > 
> > For maximal correctness, I should make the str entry in opcode/i386.h
> > reject strl <memory>, and generate the same byte sequence for
> > str <mem> and strw <mem>.  With the current iteration of my patch this
> > 
> >         str     (%ebx)
> >         strw    (%ebx)
> >         strl    (%ebx)
> > 
> > assembles to
> > 
> >    0:   0f 00 0b                strl   (%ebx)
> >    3:   66 0f 00 0b             strw   (%ebx)
> >    7:   0f 00 0b                strl   (%ebx)
> > 
> > which is not _wrong_, but the disassembly is misleading and strw is
> > longer than it needs to be.
> > 
> > Is it possible to do that?
> 
> This ought to work.  Untested...
> 
> {"str",	   1, 0x0f00, 1, Cpu286, wlq_Suf|Modrm,		{ WordReg|InvMem, 0, 0} },
								  ^^^^^^^

That means 64bit registers allowed. Shouldn't that be Reg16|Reg32?

> {"str",	   1, 0x0f00, 1, Cpu286, w_Suf|Modrm|IgnoreSize,{ Reg16|ShortMem, 0, 0} },
> 



H.J.