From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1D496C2B9F4 for ; Tue, 15 Jun 2021 02:49:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ED4D1613C2 for ; Tue, 15 Jun 2021 02:49:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229931AbhFOCvj (ORCPT ); Mon, 14 Jun 2021 22:51:39 -0400 Received: from mail-ed1-f52.google.com ([209.85.208.52]:42659 "EHLO mail-ed1-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230017AbhFOCvh (ORCPT ); Mon, 14 Jun 2021 22:51:37 -0400 Received: by mail-ed1-f52.google.com with SMTP id i13so49074951edb.9; Mon, 14 Jun 2021 19:49:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=sQa/CyUV3AEwC/LA7ChZSvZVCCa5fmmDbkR0hhf+KY0=; b=mmp9q+AafLl6aPmANPZJ49tFCwEFf5ixTu5cI3fytISRdeqVetdQ/jjSzbl/0us0Py r6I/Mn41qMg21wxc3Z/g8AauibBhTjAwJMKl0UiSstoXt+uocQncVRyND9vTcvqn/lft NTnq0p5rkUvIpk3ZdIhgcTjQB6wgFcveOQbb74TnJtavMwUIfYAvsuzl5gCSeXXE/f+P 2jFhjftOVoefrMi3zDolfDLU9RCDxMMN7ychppUHpbulOV/96TDTxJzNRc8F/9pROJb6 12Nl7rzGKwAyErB9gkcx8L6oy+9Sirf4Dflrk/tAbpRvTdUi/TG4W6dz7b7CQN6Z+vzY 0CvQ== X-Gm-Message-State: AOAM5331zK0slZm6n7I4GOrJ4kWsNTsORoVhBaAuJOi/nMpNDr6MxEAP BGsSq/GP6FYidvLOaFTxJ5C9KWYgBStpMg== X-Google-Smtp-Source: ABdhPJyIWHb5QFeN5xkFSB8wE3IB4UlFXlAqqFnvUJIA5oeI15EtAWJUgoa8IlEkAJToCofdLzwVJw== X-Received: by 2002:a17:906:264c:: with SMTP id i12mr18194532ejc.101.1623724776230; Mon, 14 Jun 2021 19:39:36 -0700 (PDT) Received: from msft-t490s.teknoraver.net (net-37-119-128-179.cust.vodafonedsl.it. [37.119.128.179]) by smtp.gmail.com with ESMTPSA id cn25sm834966edb.69.2021.06.14.19.39.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Jun 2021 19:39:35 -0700 (PDT) From: Matteo Croce To: linux-riscv@lists.infradead.org Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Paul Walmsley , Palmer Dabbelt , Albert Ou , Atish Patra , Emil Renner Berthing , Akira Tsukamoto , Drew Fustini , Bin Meng Subject: [PATCH 0/3] riscv: optimized mem* functions Date: Tue, 15 Jun 2021 04:38:09 +0200 Message-Id: <20210615023812.50885-1-mcroce@linux.microsoft.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org From: Matteo Croce Replace the assembly mem{cpy,move,set} with C equivalent. Try to access RAM with the largest bit width possible, but without doing unaligned accesses. Tested on a BeagleV Starlight with a SiFive U74 core, where the improvement is noticeable. Matteo Croce (3): riscv: optimized memcpy riscv: optimized memmove riscv: optimized memset arch/riscv/include/asm/string.h | 18 ++-- arch/riscv/kernel/Makefile | 1 - arch/riscv/kernel/riscv_ksyms.c | 17 ---- arch/riscv/lib/Makefile | 4 +- arch/riscv/lib/memcpy.S | 108 --------------------- arch/riscv/lib/memmove.S | 64 ------------- arch/riscv/lib/memset.S | 113 ---------------------- arch/riscv/lib/string.c | 162 ++++++++++++++++++++++++++++++++ 8 files changed, 172 insertions(+), 315 deletions(-) delete mode 100644 arch/riscv/kernel/riscv_ksyms.c delete mode 100644 arch/riscv/lib/memcpy.S delete mode 100644 arch/riscv/lib/memmove.S delete mode 100644 arch/riscv/lib/memset.S create mode 100644 arch/riscv/lib/string.c -- 2.31.1