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{ "id": 819281, "url": "http://patchwork.ozlabs.org/api/covers/819281/?format=api", "web_url": "http://patchwork.ozlabs.org/project/sparclinux/cover/1506540326-9604-1-git-send-email-vijay.ac.kumar@oracle.com/", "project": { "id": 10, "url": "http://patchwork.ozlabs.org/api/projects/10/?format=api", "name": "Linux SPARC Development ", "link_name": "sparclinux", "list_id": "sparclinux.vger.kernel.org", "list_email": "sparclinux@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<1506540326-9604-1-git-send-email-vijay.ac.kumar@oracle.com>", "list_archive_url": null, "date": "2017-09-27T19:25:24", "name": "[v2,0/2] sparc64: Optimize fls, fls64 and __fls", "submitter": { "id": 67939, "url": "http://patchwork.ozlabs.org/api/people/67939/?format=api", "name": "Vijay Kumar", "email": "vijay.ac.kumar@oracle.com" }, "mbox": "http://patchwork.ozlabs.org/project/sparclinux/cover/1506540326-9604-1-git-send-email-vijay.ac.kumar@oracle.com/mbox/", "series": [ { "id": 5430, "url": "http://patchwork.ozlabs.org/api/series/5430/?format=api", "web_url": "http://patchwork.ozlabs.org/project/sparclinux/list/?series=5430", "date": "2017-09-27T19:25:26", "name": "sparc64: Optimize fls, fls64 and __fls", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/5430/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/819281/comments/", "headers": { "Return-Path": "<sparclinux-owner@vger.kernel.org>", "X-Original-To": "patchwork-incoming@ozlabs.org", "Delivered-To": "patchwork-incoming@ozlabs.org", "Authentication-Results": "ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=sparclinux-owner@vger.kernel.org;\n\treceiver=<UNKNOWN>)", "Received": [ "from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3y2SVF0Rkcz9t6C\n\tfor <patchwork-incoming@ozlabs.org>;\n\tThu, 28 Sep 2017 05:26:13 +1000 (AEST)", "(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751495AbdI0TZo (ORCPT <rfc822;patchwork-incoming@ozlabs.org>);\n\tWed, 27 Sep 2017 15:25:44 -0400", "from aserp1040.oracle.com ([141.146.126.69]:36072 \"EHLO\n\taserp1040.oracle.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1750846AbdI0TZm (ORCPT\n\t<rfc822; sparclinux@vger.kernel.org>); Wed, 27 Sep 2017 15:25:42 -0400", "from aserv0022.oracle.com (aserv0022.oracle.com [141.146.126.234])\n\tby aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2)\n\twith ESMTP id v8RJPdPO021481\n\t(version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256\n\tverify=OK); Wed, 27 Sep 2017 19:25:39 GMT", "from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72])\n\tby aserv0022.oracle.com (8.14.4/8.14.4) with ESMTP id v8RJPd7R023041\n\t(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256\n\tverify=OK); Wed, 27 Sep 2017 19:25:39 GMT", "from abhmp0002.oracle.com (abhmp0002.oracle.com [141.146.116.8])\n\tby userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id v8RJPcds024880; \n\tWed, 27 Sep 2017 19:25:38 GMT", "from ca-sparc60.us.oracle.com (/10.147.24.150)\n\tby default (Oracle Beehive Gateway v4.0)\n\twith ESMTP ; Wed, 27 Sep 2017 12:25:38 -0700" ], "From": "Vijay Kumar <vijay.ac.kumar@oracle.com>", "To": "davem@davemloft.net", "Cc": "linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org,\n\tbabu.moger@oracle.com, rob.gardner@oracle.com", "Subject": "[PATCH v2 0/2] sparc64: Optimize fls, fls64 and __fls", "Date": "Wed, 27 Sep 2017 13:25:24 -0600", "Message-Id": "<1506540326-9604-1-git-send-email-vijay.ac.kumar@oracle.com>", "X-Mailer": "git-send-email 1.7.1", "X-Source-IP": "aserv0022.oracle.com [141.146.126.234]", "Sender": "sparclinux-owner@vger.kernel.org", "Precedence": "bulk", "List-ID": "<sparclinux.vger.kernel.org>", "X-Mailing-List": "sparclinux@vger.kernel.org" }, "content": "SPARC provides lzcnt instruction (with VIS3) which can be used to\noptimize fls, fls64 and __fls functions. For the systems that supports \nlzcnt instruction, we now do boot time patching to use sparc\noptimized fls, fls64 and __fls functions.\n\nv1->v2: \n - Fixed delay slot issue pointed by Rob Gardner in patch 2/2.\n\nVijay Kumar (2):\n sparc64: Define SPARC default fls and __fls\n sparc64: Use lzcnt instruction for fls and __fls\n\n arch/sparc/Makefile | 1 +\n arch/sparc/include/asm/bitops_64.h | 7 +-\n arch/sparc/kernel/head_64.S | 2 +\n arch/sparc/lib/Makefile | 4 +\n arch/sparc/lib/NG4fls.S | 31 +++++++++\n arch/sparc/lib/NG4patch.S | 9 +++\n arch/sparc/lib/fls.S | 126 ++++++++++++++++++++++++++++++++++++\n 7 files changed, 177 insertions(+), 3 deletions(-)\n create mode 100644 arch/sparc/lib/NG4fls.S\n create mode 100644 arch/sparc/lib/fls.S\n\n--\nTo unsubscribe from this list: send the line \"unsubscribe sparclinux\" in\nthe body of a message to majordomo@vger.kernel.org\nMore majordomo info at http://vger.kernel.org/majordomo-info.html" }