From patchwork Mon Sep 3 15:19:35 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sandipan Das X-Patchwork-Id: 965616 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4243MW52KQz9s4Z for ; Tue, 4 Sep 2018 07:41:59 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4243MW0cj7zF31D for ; Tue, 4 Sep 2018 07:41:59 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=sandipan@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 423ttn6Sn0zF37r for ; Tue, 4 Sep 2018 01:20:01 +1000 (AEST) Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w83FIpiF100233 for ; Mon, 3 Sep 2018 11:19:59 -0400 Received: from e06smtp05.uk.ibm.com (e06smtp05.uk.ibm.com [195.75.94.101]) by mx0a-001b2d01.pphosted.com with ESMTP id 2m96ntt4w8-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 03 Sep 2018 11:19:59 -0400 Received: from localhost by e06smtp05.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 3 Sep 2018 16:19:50 +0100 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w83FJn2217891462 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 3 Sep 2018 15:19:49 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 083F952054; Mon, 3 Sep 2018 18:19:43 +0100 (BST) Received: from localhost.localdomain (unknown [9.195.22.129]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id C20485204F; Mon, 3 Sep 2018 18:19:41 +0100 (BST) From: Sandipan Das To: mpe@ellerman.id.au Subject: [PATCH 3/6] powerpc sstep: Add cnttzw, cnttzd instruction emulation Date: Mon, 3 Sep 2018 20:49:35 +0530 X-Mailer: git-send-email 2.14.4 In-Reply-To: References: In-Reply-To: References: X-TM-AS-GCONF: 00 x-cbid: 18090315-0020-0000-0000-000002C06FC6 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18090315-0021-0000-0000-0000210D8FF5 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-09-03_09:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=804 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809030160 X-Mailman-Approved-At: Tue, 04 Sep 2018 07:22:11 +1000 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: paulus@samba.org, naveen.n.rao@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, anton@samba.org, ravi.bangoria@linux.ibm.com Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" This adds emulation support for the following integer instructions: * Count Trailing Zeros Word (cnttzw[.]) * Count Trailing Zeros Doubleword (cnttzd[.]) Signed-off-by: Sandipan Das --- arch/powerpc/lib/sstep.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c index 18ac0a26c4fc..d57cb4e28621 100644 --- a/arch/powerpc/lib/sstep.c +++ b/arch/powerpc/lib/sstep.c @@ -1816,6 +1816,20 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, case 506: /* popcntd */ do_popcnt(regs, op, regs->gpr[rd], 64); goto logical_done_nocc; +#endif + case 538: /* cnttzw */ + if (!cpu_has_feature(CPU_FTR_ARCH_300)) + return -1; + val = (unsigned int) regs->gpr[rd]; + op->val = ( val ? __builtin_ctz(val) : 32 ); + goto logical_done; +#ifdef __powerpc64__ + case 570: /* cnttzd */ + if (!cpu_has_feature(CPU_FTR_ARCH_300)) + return -1; + val = regs->gpr[rd]; + op->val = ( val ? __builtin_ctzl(val) : 64 ); + goto logical_done; #endif case 922: /* extsh */ op->val = (signed short) regs->gpr[rd];