[{"id":3668854,"web_url":"http://patchwork.ozlabs.org/comment/3668854/","msgid":"","list_archive_url":null,"date":"2026-03-25T07:20:09","subject":"Re: [PATCH] i386: Support HYGON c86-4g series processors","submitter":{"id":808,"url":"http://patchwork.ozlabs.org/api/people/808/","name":"Uros Bizjak","email":"ubizjak@gmail.com"},"content":"On Wed, Mar 25, 2026 at 7:17 AM Kewen Lin wrote:\n>\n> Hi,\n>\n> This patch enables new x86 CPU vendor HYGON ID detection\n> and adds c86-4g series c86-4g-m{4,6,7} processor supports.\n> Without such support, if users use -march=native option on\n> HYGON machines, they can get some old arch like core2, it\n> would be suboptimal. It also enables -m{arch,tune}=c86-4g\n> -m{4,6,7} supports. Based on the hardware characteristics,\n> appropriate cost models and tuning parameters are provided.\n>\n> New machine description files are introduced: c86-4g.md is\n> used to describe the pipeline for c86-4g-m4 and c86-4g-m6,\n> while c86-4g-m7.md describes the pipeline for c86-4g-m7.\n> To better model some pipeline information, it introduces\n> new attrs c86_attr and c86_decode by following existing\n> practice.\n>\n> Bootstrapped and regtested on hygon c86-4g-m4 and c86-4g-m7\n> machine, as well as a cfarm x86-64 machine.\n>\n> It's late stage 4 now, I guess it has to be next stage 1\n> materials? If so, is it ok for trunk once gcc-17 stage1\n> opens?\n\nWhile in the past simple tuning patches were accepted in stage-4, this\none is just too intrusive for stage-4. Please ping for it when next\nstage-1 opens in a couple of weeks.\n\nUros.","headers":{"Return-Path":"","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 (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=PXOESnsh;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=38.145.34.32; helo=vm01.sourceware.org;\n envelope-from=gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org;\n receiver=patchwork.ozlabs.org)","sourceware.org;\n\tdkim=pass (2048-bit key,\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=PXOESnsh","sourceware.org;\n dmarc=pass (p=none dis=none) header.from=gmail.com","sourceware.org; spf=pass smtp.mailfrom=gmail.com","server2.sourceware.org;\n arc=pass smtp.remote-ip=209.85.167.41"],"Received":["from vm01.sourceware.org (vm01.sourceware.org [38.145.34.32])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fgdc5346Tz1y1G\n\tfor ; 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Wed, 25 Mar 2026\n 00:20:21 -0700 (PDT)","MIME-Version":"1.0","References":"<387794d9-199a-4373-97be-5e70e772e014@hygon.cn>","In-Reply-To":"<387794d9-199a-4373-97be-5e70e772e014@hygon.cn>","From":"Uros Bizjak ","Date":"Wed, 25 Mar 2026 08:20:09 +0100","X-Gm-Features":"AQROBzBU8QBkoc-KtHVoeYkVPYpgfBuUu04NzsBFulY2aedmUvwv1rS626dRSXE","Message-ID":"\n ","Subject":"Re: [PATCH] i386: Support HYGON c86-4g series processors","To":"Kewen Lin ","Cc":"\"gcc-patches@gcc.gnu.org\" ,\n Liulxx ,\n Qingkuan Lai , Feng Xue ,\n \"hubicka@ucw.cz\" ,\n \"hongtao.liu@intel.com\" ","Content-Type":"text/plain; charset=\"UTF-8\"","Content-Transfer-Encoding":"quoted-printable","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"}}]