From: "Kong, Lingling" <lingling.kong@intel.com>
To: "Kong, Lingling" <lingling.kong@intel.com>,
Hongtao Liu <crazylht@gmail.com>
Cc: "Liu, Hongtao" <hongtao.liu@intel.com>,
"gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
Subject: RE: [wwwdocs] [GCC13] Mention Intel __bf16 support in AVX512BF16 intrinsics.
Date: Thu, 3 Nov 2022 06:52:59 +0000 [thread overview]
Message-ID: <DM4PR11MB548763DB7E1E6A099BC9BFF2EC389@DM4PR11MB5487.namprd11.prod.outlook.com> (raw)
In-Reply-To: <DM4PR11MB548756680AA18A48A645E226EC399@DM4PR11MB5487.namprd11.prod.outlook.com>
> > > diff --git a/htdocs/gcc-13/changes.html b/htdocs/gcc-13/changes.html
> > > index 7c6bfa6e..cd0282f1 100644
> > > --- a/htdocs/gcc-13/changes.html
> > > +++ b/htdocs/gcc-13/changes.html
> > > @@ -230,6 +230,8 @@ a work-in-progress.</p>
> > > <li>For both C and C++ the <code>__bf16</code> type is supported on
> > > x86 systems with SSE2 and above enabled.
> > > </li>
> > > + <li>Use <code>__bf16</code> type for AVX512BF16 intrinsics.
> > Could you add more explanations. Like originally it's ..., now it's
> > ..., and what's the difference when users compile the same source
> > code(which contains
> > avx512bf16 intrinsics) with gcc12(and before) and GCC13.
> > > + </li>
> > > </ul>
> > >
> > > <!-- <h3 id="mips">MIPS</h3> -->
> > > --
> > > 2.18.2
> > >
> Yes, changed it. Thanks a lot!
>
> Subject: [PATCH] Mention Intel __bf16 support in AVX512BF16 intrinsics.
>
> ---
> htdocs/gcc-13/changes.html | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/htdocs/gcc-13/changes.html b/htdocs/gcc-13/changes.html index
> 7c6bfa6e..a35f4fab 100644
> --- a/htdocs/gcc-13/changes.html
> +++ b/htdocs/gcc-13/changes.html
> @@ -230,6 +230,12 @@ a work-in-progress.</p>
> <li>For both C and C++ the <code>__bf16</code> type is supported on
> x86 systems with SSE2 and above enabled.
> </li>
> + <li>Use <code>__bf16</code> type for AVX512BF16 intrinsics.
> + Previously we use short to represent bf16. Now we introduced
> <code>__bf16</code> to x86 psABI.
> + So we switch intrinsics in AVX512BF16 to the new type <code>__bf16</code>.
> + When users compile the same source code contains AVX512BF16
> + intrinsics with
> + GCC13 need to support SSE2, which is different to GCC12 (and before).
> + </li>
> </ul>
>
> <!-- <h3 id="mips">MIPS</h3> -->
> --
> 2.18.2
>
> BRs,
> Lingling
Sorry, modified again. New patch is as below.
htdocs/gcc-13/changes.html | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/htdocs/gcc-13/changes.html b/htdocs/gcc-13/changes.html index 7c6bfa6e..7a5d2ab6 100644
--- a/htdocs/gcc-13/changes.html
+++ b/htdocs/gcc-13/changes.html
@@ -230,6 +230,11 @@ a work-in-progress.</p>
<li>For both C and C++ the <code>__bf16</code> type is supported on
x86 systems with SSE2 and above enabled.
</li>
+ <li>Use real <code>__bf16</code> type for AVX512BF16 intrinsics.
+ Previously we use __bfloat16 which is typedef of short. Now we
+ introduced real <code>__bf16</code> type to x86 psABI. Users need to
+ adjust their AVX512BF16-related source code when upgrading GCC12 to GCC13.
+ </li>
</ul>
<!-- <h3 id="mips">MIPS</h3> -->
--
2.18.2
BRs,
Lingling
next prev parent reply other threads:[~2022-11-03 6:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20221101011756.3818109-1-lingling.kong@intel.com>
2022-11-01 1:20 ` Kong, Lingling
2022-11-01 1:28 ` Hongtao Liu
2022-11-02 2:15 ` Kong, Lingling
2022-11-03 6:52 ` Kong, Lingling [this message]
2022-11-03 7:57 ` Hongtao Liu
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