From patchwork Wed Oct 11 18:50:05 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vijay Kumar X-Patchwork-Id: 824513 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=sparclinux-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3yC34B5k4Lz9sBd for ; Thu, 12 Oct 2017 05:51:54 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753334AbdJKSvm (ORCPT ); Wed, 11 Oct 2017 14:51:42 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:49031 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753094AbdJKSuY (ORCPT ); Wed, 11 Oct 2017 14:50:24 -0400 Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id v9BIoIWh021128 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 11 Oct 2017 18:50:19 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id v9BIoIDm030566 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 11 Oct 2017 18:50:18 GMT Received: from abhmp0017.oracle.com (abhmp0017.oracle.com [141.146.116.23]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id v9BIoHKK017298; Wed, 11 Oct 2017 18:50:17 GMT Received: from ca-sparc60.us.oracle.com (/10.147.24.150) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 11 Oct 2017 11:50:17 -0700 From: Vijay Kumar To: davem@davemloft.net Cc: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, babu.moger@oracle.com, rob.gardner@oracle.com, sam@ravnborg.org, anthony.yznaga@oracle.com Subject: [PATCH v4 4/5] sparc64: SPARC optimized __fls function Date: Wed, 11 Oct 2017 12:50:05 -0600 Message-Id: <1507747806-10251-5-git-send-email-vijay.ac.kumar@oracle.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1507747806-10251-1-git-send-email-vijay.ac.kumar@oracle.com> References: <1507747806-10251-1-git-send-email-vijay.ac.kumar@oracle.com> X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: sparclinux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: sparclinux@vger.kernel.org Defined SPARC optimized __fls using lzcnt opcode. Signed-off-by: Vijay Kumar --- arch/sparc/lib/NG4fls.S | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/arch/sparc/lib/NG4fls.S b/arch/sparc/lib/NG4fls.S index bc17b65..2d0991e 100644 --- a/arch/sparc/lib/NG4fls.S +++ b/arch/sparc/lib/NG4fls.S @@ -18,3 +18,13 @@ ENTRY(NG4fls) retl sub %g3, %g2, %o0 ENDPROC(NG4fls) + +ENTRY(__NG4fls) + brz,pn %o0, 1f + LZCNT_O0_G2 !lzcnt %o0, %g2 + mov 63, %g3 + sub %g3, %g2, %o0 +1: + retl + nop +ENDPROC(__NG4fls)