[{"id":3683151,"web_url":"http://patchwork.ozlabs.org/comment/3683151/","msgid":"<afBXZkl2dWSYZzZi@tucnak>","list_archive_url":null,"date":"2026-04-28T06:44:54","subject":"Re: [PATCH][www] Add Zen6 and Zen specific changes to release notes","submitter":{"id":671,"url":"http://patchwork.ozlabs.org/api/people/671/","name":"Jakub Jelinek","email":"jakub@redhat.com"},"content":"On Tue, Apr 28, 2026 at 08:33:25AM +0200, Richard Biener wrote:\n> \n> Does this look OK?\n\ns/ontop/on top/\n\n> \t* gcc-16/changes.html: Add AMD Zen specific items.\n> ---\n>  htdocs/gcc-16/changes.html | 11 +++++++++++\n>  1 file changed, 11 insertions(+)\n> \n> diff --git a/htdocs/gcc-16/changes.html b/htdocs/gcc-16/changes.html\n> index 65462545..749f0c9c 100644\n> --- a/htdocs/gcc-16/changes.html\n> +++ b/htdocs/gcc-16/changes.html\n> @@ -487,6 +487,17 @@ struct Affected : E\n>  <h3 id=\"x86\">IA-32/x86-64</h3>\n>  \n>  <ul>\n> +   <li>GCC now supports AMD CPUs based on the Zen6 core via\n> +    <code>-march=znver6</code>.  This switch enables the\n> +    AVX512_BMM, AVX_NE_CONVERT, AVX_IFMA, AVX_VNNI_INT8 and\n> +    AVX512_FP16 ISA extensions ontop of ISA extensions enabled\n> +    for Zen5.\n> +   </li>\n> +  <li>Auto-vectorization will now try to use a masked vector epilog when\n> +    AVX512 support is enabled and tuning for <code>znver4</code>,\n> +    <code>znver5</code> or <code>znver6</code>, saving code size\n> +    and improving performance.\n> +  </li>\n>    <li>GCC now supports the Intel CPU named Wildcat Lake through\n>      <code>-march=wildcatlake</code>.\n>      Wildcat Lake is based on Panther Lake.\n\n\tJakub","headers":{"Return-Path":"<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>","X-Original-To":["incoming@patchwork.ozlabs.org","gcc-patches@gcc.gnu.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","gcc-patches@gcc.gnu.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=gX8o9rtX;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; 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