From: "Cui, Lili" <lili.cui@intel.com>
To: "Beulich, Jan" <JBeulich@suse.com>
Cc: Binutils <binutils@sourceware.org>, "H.J. Lu" <hjl.tools@gmail.com>
Subject: RE: [PATCH] x86/Intel: test non-legacy VCVT{,U}SI2SH insn forms
Date: Thu, 19 May 2022 06:14:48 +0000 [thread overview]
Message-ID: <SJ0PR11MB5600867624C9266B761B72819ED09@SJ0PR11MB5600.namprd11.prod.outlook.com> (raw)
In-Reply-To: <0dd4d99f-b2e1-df2d-5f93-007511743c60@suse.com>
> -----Original Message-----
> From: Jan Beulich <jbeulich@suse.com>
> Sent: Thursday, May 19, 2022 1:54 PM
> To: Cui, Lili <lili.cui@intel.com>
> Cc: Binutils <binutils@sourceware.org>; H.J. Lu <hjl.tools@gmail.com>
> Subject: Re: [PATCH] x86/Intel: test non-legacy VCVT{,U}SI2SH insn forms
>
> On 19.05.2022 03:21, Cui, Lili wrote:
> >>> For an unclear reason corresponding AVX512F tests were apparently
> >>> not cloned or used as reference here, and instead the bogus legacy
> >>> forms of the insns (with the embedded rounding specifier not last) were
> used.
> >>> ---
> >>> Ideally the legacy forms wouldn't have been supported by gas in the
> >>> first place, but I guess it's too late now for correcting this mistake.
> >>>
> >>> Note that in some other (pre-FP16) tests we also have some legacy
> >>> instances left. Perhaps we want to retain those for making sure they
> >>> continue to work even if modern code better wouldn't use them.
> >>> Ultimately even those forms aren't MASM-compatible, but I'll get to
> >>> that later.
> >>>
> >
> > Hi Jan, I also found some other similar cases, and I will create a patch to fix
> them later. Thanks!
>
> I'm not sure we want to eliminate / replace all of them - see what I've said
> above. After all we want the assembler to continue to accept this form, for
> not breaking code pre-dating the introduction of the partly (and now also the
> fully) SDM-compatible form.
>
Ok, got it, I'm not going to change them to make sure their formatting continues to work.
Thanks,
Lili.
> Jan
>
prev parent reply other threads:[~2022-05-19 6:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-12 6:57 Jan Beulich
2022-05-18 17:38 ` H.J. Lu
2022-05-19 1:21 ` Cui, Lili
2022-05-19 5:53 ` Jan Beulich
2022-05-19 6:14 ` Cui, Lili [this message]
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