From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by sourceware.org (Postfix) with ESMTPS id A0ADA3858C56 for ; Mon, 28 Mar 2022 13:07:47 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org A0ADA3858C56 Received: by mail-pj1-x102d.google.com with SMTP id m22so14016139pja.0 for ; Mon, 28 Mar 2022 06:07:47 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=HP0tm/axRyGvm094SIsPB6Wqopku12VeGa1ilESR3YA=; b=dEvWeYhbjt9Li2oZk+sbMkW+9Q44Km94P9qqZJXy7eEGwpaAptd2f2yNpxozWTvfaV RJm635eLmlL5OvRqCqb2pkLO2wi1yoesBd70nwvAT/brbcfvVxw17nSuj7i2RvjYTw2l 91fl7trFTYViQudmn+LXiVIeDAyK7o90tSnC4h0YcCLUkrnIyZKD7OZ1hYviFfQqPZ6s /+0dIA2llGx4ltUdec8eviookPSKHRcsJTGmG/hhiwN14Yo09w3fWC4zTz+jNjDPE7AH IyTpp+y+DNs2rTUurq3uV75ExqxQcf1txjSEqMqlCU/U8YOvFMTErpmiJXoeDgJOwmZb rUjQ== X-Gm-Message-State: AOAM533PbvUoYEd6YccxYXj8CTlKZgmvONnl8DtST3yKYpDEcMoRHnaA 7Qdn/Pc6yjA5Sq67073Ivuqqe+zbO7tOzWLzj8g= X-Google-Smtp-Source: ABdhPJzPR2a2asA5pr7ooSdjtb/F8E8PSxYcza+V2/gxDWIeR1Hp3Ex9LJq5ct+CClFtpJteIepscRt/cw7iIj189Vs= X-Received: by 2002:a17:90b:1c02:b0:1c8:da30:5ed7 with SMTP id oc2-20020a17090b1c0200b001c8da305ed7mr18199915pjb.28.1648472866594; Mon, 28 Mar 2022 06:07:46 -0700 (PDT) MIME-Version: 1.0 References: <89bb3f1942814671ae858dcef4b3b870@zhaoxin.com> In-Reply-To: <89bb3f1942814671ae858dcef4b3b870@zhaoxin.com> From: "H.J. Lu" Date: Mon, 28 Mar 2022 06:07:10 -0700 Message-ID: Subject: Re: [PATCH v1 3/6] x86: Remove mem{move|cpy}-ssse3 To: Mayshao-oc Cc: "goldstein.w.n@gmail.com" , GNU C Library , Florian Weimer , "Carlos O'Donell" , "Louis Qi(BJ-RD)" Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-3019.9 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, KAM_NUMSUBJECT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 Mar 2022 13:07:50 -0000 On Mon, Mar 28, 2022 at 1:10 AM Mayshao-oc wrote: > > On Fri, Mar 25, 2022 at 6:36 PM Noah Goldstein wrote: > > > With SSE2, SSE4.1, AVX2, and EVEX versions very few targets prefer > > SSSE3. As a result its no longer with the code size cost. > > --- > > sysdeps/x86_64/multiarch/Makefile | 2 - > > sysdeps/x86_64/multiarch/ifunc-impl-list.c | 15 - > > sysdeps/x86_64/multiarch/ifunc-memmove.h | 18 +- > > sysdeps/x86_64/multiarch/memcpy-ssse3.S | 3151 -------------------- > > sysdeps/x86_64/multiarch/memmove-ssse3.S | 4 - > > 5 files changed, 7 insertions(+), 3183 deletions(-) > > delete mode 100644 sysdeps/x86_64/multiarch/memcpy-ssse3.S > > delete mode 100644 sysdeps/x86_64/multiarch/memmove-ssse3.S > > On some platforms, such as Zhaoxin, the memcpy performance of SSSE3 > is better than that of AVX2, and the current computer system has sufficient > disk capacity and memory capacity. How does the SSSE3 version compare against the SSE2 version? > It is strongly recommended to keep the SSSE3 version. > -- H.J.