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Re: PATCH: Remove memory check on SVME instructions
- From: "H.J. Lu" <hjl at lucon dot org>
- To: Jan Beulich <jbeulich at novell dot com>
- Cc: christophe dot harle at amd dot com, dwarak dot rajagopal at amd dot com, michael dot meissner at amd dot com, binutils at sources dot redhat dot com
- Date: Wed, 5 Sep 2007 21:42:56 -0700
- Subject: Re: PATCH: Remove memory check on SVME instructions
- References: <46DEF048020000780003C685@public.id2-vpn.continvity.gns.novell.com>
On Wed, Sep 05, 2007 at 06:07:04PM +0100, Jan Beulich wrote:
> >>> "H.J. Lu" <hjl@lucon.org> 09/05/07 3:27 PM >>>
> >> >SVME instructions don't take any memory operand. You will get an
> >> >error if you try to use an memory operand.
> >>
> >> They really do, just the addressing is so that only rAX can be used. If you check
> >> the svme test case, you'll see that there are explict uses of memory operands. In
> >> the original patch implementation it may not have been that way, but since the
> >> meaning of the operands is memory-like, we agreed on a memory-like notation
> >> iirc.
> >
> >It is wrong and has been fixed.
>
> On what basis are you concluding this? As I said, we had specifically agreed on a
> memory operand like notation, to reflect the actual effect these opcodes have.
It doesn't make those instructions take memory operands as specified
in IA32 encoding scheme.
H.J.