From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by sourceware.org (Postfix) with ESMTPS id 41DC8388701E for ; Tue, 22 Dec 2020 15:36:14 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 41DC8388701E Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0BMFWNrY189261 for ; Tue, 22 Dec 2020 10:36:13 -0500 Received: from ppma04dal.us.ibm.com (7a.29.35a9.ip4.static.sl-reverse.com [169.53.41.122]) by mx0a-001b2d01.pphosted.com with ESMTP id 35kh3fmjxu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 22 Dec 2020 10:36:13 -0500 Received: from pps.filterd (ppma04dal.us.ibm.com [127.0.0.1]) by ppma04dal.us.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 0BMFRZ05016491 for ; Tue, 22 Dec 2020 15:36:12 GMT Received: from b03cxnp07028.gho.boulder.ibm.com (b03cxnp07028.gho.boulder.ibm.com [9.17.130.15]) by ppma04dal.us.ibm.com with ESMTP id 35kk8r84e7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 22 Dec 2020 15:36:12 +0000 Received: from b03ledav006.gho.boulder.ibm.com (b03ledav006.gho.boulder.ibm.com [9.17.130.237]) by b03cxnp07028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0BMFaB2n24838536 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 22 Dec 2020 15:36:11 GMT Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2712BC6055 for ; Tue, 22 Dec 2020 15:36:11 +0000 (GMT) Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 89D90C6061 for ; Tue, 22 Dec 2020 15:36:10 +0000 (GMT) Received: from [9.160.38.10] (unknown [9.160.38.10]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP for ; Tue, 22 Dec 2020 15:36:10 +0000 (GMT) Subject: Re: [PATCH] powerpc: Add optimized ilogbf128 for POWER9 To: libc-alpha@sourceware.org References: <20201222153039.17722-1-rzinsly@linux.ibm.com> From: Raphael M Zinsly Message-ID: <7dd34cc1-4a28-743f-72be-c27c2467822e@linux.ibm.com> Date: Tue, 22 Dec 2020 12:36:09 -0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: <20201222153039.17722-1-rzinsly@linux.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343, 18.0.737 definitions=2020-12-22_07:2020-12-21, 2020-12-22 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 clxscore=1015 malwarescore=0 mlxlogscore=711 lowpriorityscore=0 phishscore=0 spamscore=0 adultscore=0 mlxscore=0 priorityscore=1501 bulkscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012220111 X-Spam-Status: No, score=-6.7 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_EF, KAM_NUMSUBJECT, NICE_REPLY_A, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) 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, 22 Dec 2020 15:36:15 -0000 Benchtests results with and without this patch on a POWER9: without: "ilogbf128": { "subnormal": { "duration": 5.09834e+08, "iterations": 2.8146e+07, "max": 38.979, "min": 2.939, "mean": 18.1139 }, "normal": { "duration": 4.99378e+08, "iterations": 1.6151e+08, "max": 16.698, "min": 2.942, "mean": 3.09193 } } with: "ilogbf128": { "subnormal": { "duration": 5.09989e+08, "iterations": 2.5978e+07, "max": 41.027, "min": 4.674, "mean": 19.6316 }, "normal": { "duration": 4.98105e+08, "iterations": 1.77912e+08, "max": 12.663, "min": 2.792, "mean": 2.79972 } } Best Regards, -- Raphael Moreira Zinsly IBM Linux on Power Toolchain