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Date:      Sat, 3 Jun 2023 19:57:03 +0100
From:      Jessica Clarke <jrtc27@freebsd.org>
To:        Dmitry Chagin <dchagin@freebsd.org>
Cc:        "src-committers@freebsd.org" <src-committers@freebsd.org>, "dev-commits-src-all@freebsd.org" <dev-commits-src-all@freebsd.org>, "dev-commits-src-main@freebsd.org" <dev-commits-src-main@freebsd.org>
Subject:   Re: git: 1b0d96f3c43a - main - xregs_sig: Finish renaming simd to xregs before adding avx
Message-ID:  <3F83B6B8-7A16-488B-9594-50A7426931F5@freebsd.org>
In-Reply-To: <ZHuLcBsQmp-Yw649@heemeyer.club>
References:  <202306031713.353HDY7D036200@gitrepo.freebsd.org> <FF273FCA-C081-4AF6-9D75-1AD86EAE68AE@freebsd.org> <ZHuLcBsQmp-Yw649@heemeyer.club>

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On 3 Jun 2023, at 19:50, Dmitry Chagin <dchagin@freebsd.org> wrote:
>=20
> On Sat, Jun 03, 2023 at 07:05:48PM +0100, Jessica Clarke wrote:
>> On 3 Jun 2023, at 18:13, Dmitry Chagin <dchagin@FreeBSD.org> wrote:
>>>=20
>>> The branch main has been updated by dchagin:
>>>=20
>>> URL: =
https://cgit.FreeBSD.org/src/commit/?id=3D1b0d96f3c43a5f997dca120a83a4b069=
95df345b
>>>=20
>>> commit 1b0d96f3c43a5f997dca120a83a4b06995df345b
>>> Author:     Dmitry Chagin <dchagin@FreeBSD.org>
>>> AuthorDate: 2023-06-03 17:11:44 +0000
>>> Commit:     Dmitry Chagin <dchagin@FreeBSD.org>
>>> CommitDate: 2023-06-03 17:11:44 +0000
>>>=20
>>>   xregs_sig: Finish renaming simd to xregs before adding avx
>>=20
>> Isn=E2=80=99t this the wrong direction? =E2=80=9Cxregs=E2=80=9D =
sounds specific to x86=E2=80=99s xmm
>> registers; arm64=E2=80=99s q NEON registers are definitely not =
=E2=80=9Cxregs=E2=80=9D, those
>> are the standard GPRs.
>>=20
> NEON registers is not GPRs, here xregs is all non GPRs, ie, sse, avx,
> neon, etc.

But the AArch64 registers are called x0 through x30. They are x
registers. So calling the SIMD registers X registers is both incorrect
and highly confusing. It is not general, it is specific to x86=E2=80=99s =
notion
of SIMD.

Jess

>> Jess
>>=20
>>>   Reviewed by:            kib, jhb
>>>   Differential Revision:  https://reviews.freebsd.org/D40382





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