From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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> From: "H.J. Lu" 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 Cc: GNU C Library , "Carlos O'Donell" Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-3024.5 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham 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: Tue, 14 Sep 2021 14:40:45 -0000 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.