From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 126469 invoked by alias); 7 May 2019 15:21:29 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Received: (qmail 126456 invoked by uid 89); 7 May 2019 15:21:29 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=ham version=3.3.1 spammy=HX-Languages-Length:757 X-HELO: relay1.mentorg.com Date: Tue, 07 May 2019 15:21:00 -0000 From: Joseph Myers To: Shawn Landden CC: Subject: Re: [PATCH] powerpc: add libmvec implementations of log and logf In-Reply-To: <20190506203210.8536-1-shawn@git.icu> Message-ID: References: <20190505203438.28140-1-shawn@git.icu> <20190506203210.8536-1-shawn@git.icu> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" X-SW-Source: 2019-05/txt/msg00119.txt.bz2 On Mon, 6 May 2019, Shawn Landden wrote: > When fed numbers in the range of 0 to 2^32-1 (as doubles) the vector log > is about 75% faster than scalar log. Since you and Bert Tenjy have now posted rival patch versions implementing vector log, a key performance comparison would be against the version posted by Bert Tenjy - and in general, you should compare and contrast the two versions of log to justify why one might be better than another. It's also important in such cases to be very clear about where exactly the patch you are posting fits into exactly what other patch series. -- Joseph S. Myers joseph@codesourcery.com