From: Jan Beulich <jbeulich@suse.com>
To: "Jiang, Haochen" <haochen.jiang@intel.com>
Cc: "hjl.tools@gmail.com" <hjl.tools@gmail.com>,
"binutils@sourceware.org" <binutils@sourceware.org>
Subject: Re: [PATCH] x86: Remove unnecessary vex.w check for xh_mode in disassembler
Date: Tue, 6 Dec 2022 08:29:33 +0100 [thread overview]
Message-ID: <90dc84c9-7bef-d3da-f949-7b03ce8ac4f8@suse.com> (raw)
In-Reply-To: <SA1PR11MB5946B26A6B0BDD33B55BA870EC1B9@SA1PR11MB5946.namprd11.prod.outlook.com>
On 06.12.2022 02:36, Jiang, Haochen wrote:
>>> Another reason for removing this check is because xh_mode with
>>> broadcast usage should not indicate the vex.w bit. Instead it should
>>> be handled by a W table entry.
>>
>> There are no broadcast insns using xh_mode, and you can't really mean
>> embedded broadcast (because EVEX.W needs to be properly encoded
>> there).
>> Hence I don't follow what you're talking about here.
>
> Maybe this part is a little misleading. I will delete that in commit message.
> What I actually mean is just like what you commented.
>
> I suppose using a W table entry in the future to encode here if not using
> something like %XH.
Feel free to commit with that text dropped; aiui you've addressed H.J.'s
question.
Jan
next prev parent reply other threads:[~2022-12-06 7:29 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-05 2:53 Haochen Jiang
2022-12-05 11:16 ` Jan Beulich
2022-12-06 1:36 ` Jiang, Haochen
2022-12-06 3:39 ` H.J. Lu
2022-12-06 6:14 ` Jiang, Haochen
2022-12-06 7:29 ` Jan Beulich [this message]
2022-12-06 8:00 ` Jiang, Haochen
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