From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS17314 8.43.84.0/22 X-Spam-Status: No, score=-3.7 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED,RDNS_DYNAMIC,SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from sourceware.org (ip-8-43-85-97.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id 0DC181F8C6 for ; Tue, 14 Sep 2021 14:41:04 +0000 (UTC) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id EADFC3858018 for ; Tue, 14 Sep 2021 14:41:02 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org EADFC3858018 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1631630463; bh=jeEHOJApvivMdWbcnJLo9u7dKmKrDB5MG7AxNRE5P3U=; h=References:In-Reply-To:Date:Subject:To:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=bytauXfH7BPjinKAfpoluNEBIsAV8iKpla775VRjs80gsxrWV+8E+llB03bwbAz25 aZFXpwkGsnxJy40bdOTawgNkDi6i/L0sCruN0STZSvob+B5fL8J7WP805EoGLPVoQ1 +1WJx5U1QW74hkgcS6S5PTvXDMu+yHQdqwfqv7Vo= Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by sourceware.org (Postfix) with ESMTPS id 569313858402 for ; Tue, 14 Sep 2021 14:40:42 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 569313858402 Received: by mail-pj1-x102b.google.com with SMTP id oc9so9026994pjb.4 for ; Tue, 14 Sep 2021 07:40:42 -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=jeEHOJApvivMdWbcnJLo9u7dKmKrDB5MG7AxNRE5P3U=; b=BpnuFcIIfiX8Siyfb+dgbnvVk4v3r61fciQUdwzbwcLo29iNM3D74hJCqq1RhgAEDz Wclum6Hp/60X9fjvK2kDOUE+dopdsyaE1GejFeEKSVbt+Wv63AiAePiH2IkSlpzNAxZw jBuAsOYBR/Ih3Gmjzdr09mC1pSVbHDJymqGpQ8aRiPVBqI8dE+DOjo59BJK2T2kVMsJU W0uiS1qKLe8j/UeDXJKdw+u7A2SyeGXLj8PIsJ8Lf0sUhDIVTDV2B/mo/3PbRwBnjnR1 DF2PBERiazQMGQyaYZB+b0M0AurVds6wmQIPKwsnMv8VLEmU2/EUEPx82XwA/J6Rjk8b csxg== X-Gm-Message-State: AOAM531MXNQvxrbrWqGK+iqZeNUTQFVBGsLA1qpQ9WeWUW+xm7UwAP12 yxFdlLzwRFpoPL0ItVrnfvjf5AYDlDLDBDtUmnzsDxc8 X-Google-Smtp-Source: ABdhPJwDM6dnfDQEWzRHxTLcOaqw+4QQ1lkXPQARnU6MMY1aDaeZralZnbJjMD+iY98C0vrLZH/vWCu2yk64LYIMMsU= X-Received: by 2002:a17:902:e0c1:b0:13b:76f5:c3b4 with SMTP id e1-20020a170902e0c100b0013b76f5c3b4mr15086885pla.85.1631630441394; Tue, 14 Sep 2021 07:40:41 -0700 (PDT) MIME-Version: 1.0 References: <20210913230506.546749-1-goldstein.w.n@gmail.com> <20210914063039.1126196-1-goldstein.w.n@gmail.com> In-Reply-To: <20210914063039.1126196-1-goldstein.w.n@gmail.com> Date: Tue, 14 Sep 2021 07:40:05 -0700 Message-ID: Subject: Re: [PATCH v2 1/5] x86_64: Add support for bcmp using sse2, sse4_1, avx2, and evex To: Noah Goldstein Content-Type: text/plain; charset="UTF-8" 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: , From: "H.J. Lu via Libc-alpha" Reply-To: "H.J. Lu" Cc: GNU C Library Errors-To: libc-alpha-bounces+e=80x24.org@sourceware.org Sender: "Libc-alpha" On Mon, Sep 13, 2021 at 11:30 PM Noah Goldstein wrote: > > No bug. This commit adds support for an optimized bcmp implementation. > Support is for sse2, sse4_1, avx2, and evex. > > All string tests passing and build succeeding. memcmp can be a little slower than bcmp. But bcmp isn't a standard C function. All new codes should use memcmp. Can you improve memcmp instead? Thanks. -- H.J.