From: "Jiang, Haochen" <haochen.jiang@intel.com>
To: "Beulich, Jan" <JBeulich@suse.com>, "Zhang, Jun" <jun.zhang@intel.com>
Cc: "hjl.tools@gmail.com" <hjl.tools@gmail.com>,
"binutils@sourceware.org" <binutils@sourceware.org>
Subject: RE: [PATCH v2] Support Intel FRED LKGS
Date: Thu, 25 May 2023 07:57:38 +0000 [thread overview]
Message-ID: <SA1PR11MB59466F28370CD11EF8FA9CC7EC469@SA1PR11MB5946.namprd11.prod.outlook.com> (raw)
In-Reply-To: <SA1PR11MB5946C64D2291F72078CEDDD3EC419@SA1PR11MB5946.namprd11.prod.outlook.com>
> > Well, there are two ways of approaching this, but imo in either case
> > via a prereq change to the other insns that use this operand
> > descriptor in a questionable manner. We could split decode at the
> > ModR/M.mod level, but perhaps better is to follow MOV to/from sreg,
> > SLDT, and STR in using a D suffix and an Sv operand.
>
> I suppose the latter is better since Sv will go back to OP_E then split decode
> ad ModR/M.mod level.
>
> I will go through that to make the change.
>
> Thx,
> Haochen
I just take a look at the whole thing.
From my perspective, if we are going to use the same pattern like
SLDT and STR. Does that mean for the instruction below:
lldt %ax
We will need to add a 66 prefix for gas to make it happen or it will drop to %eax?
It will change the current assembler behavior. Is my understanding correct?
Haochen
>
> >
> > If, however, you're not happy about making the prereq change first,
> > I'd be kind of okay with the change being committed as is, and I'd
> > then try to remember to follow up accordingly. One minor adjustment
> > request,
> > though: In the opcode table comments, can you please use singular for
> > LKGS (while plural is fine for FRED)?
> >
> > Jan
next prev parent reply other threads:[~2023-05-25 7:57 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-22 6:07 Zhang, Jun
2023-05-22 9:11 ` Jan Beulich
2023-05-24 6:36 ` Jiang, Haochen
2023-05-25 7:57 ` Jiang, Haochen [this message]
2023-05-25 8:42 ` Jan Beulich
2023-05-26 6:50 ` Jiang, Haochen
2023-05-26 7:00 ` Jan Beulich
2023-05-26 8:26 ` [PATCH] x86: Add Evw to emit w suffix for several instrctions for word ptr Haochen Jiang
2023-05-26 8:46 ` Jan Beulich
2023-05-26 8:54 ` Jiang, Haochen
2023-05-26 10:52 ` Jan Beulich
2023-05-29 2:01 ` Jiang, Haochen
2023-05-29 2:08 ` Jiang, Haochen
2023-05-30 8:09 ` Jan Beulich
2023-05-31 5:48 ` Jiang, Haochen
2023-05-31 8:43 ` Jan Beulich
2023-06-01 2:14 ` H.J. Lu
-- strict thread matches above, loose matches on Subject: below --
2023-05-22 6:00 [PATCH v2] Support Intel FRED LKGS Zhang, Jun
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