From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/11575 Path: news.gmane.org!.POSTED!not-for-mail From: Rich Felker Newsgroups: gmane.linux.lib.musl.general Subject: Re: [PATCH] powerpc64le: Add single instruction math functions Date: Fri, 23 Jun 2017 15:35:33 -0400 Message-ID: <20170623193533.GO1627@brightrain.aerifal.cx> References: Reply-To: musl@lists.openwall.com NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: blaine.gmane.org 1498246549 26721 195.159.176.226 (23 Jun 2017 19:35:49 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 23 Jun 2017 19:35:49 +0000 (UTC) User-Agent: Mutt/1.5.21 (2010-09-15) To: musl@lists.openwall.com Original-X-From: musl-return-11588-gllmg-musl=m.gmane.org@lists.openwall.com Fri Jun 23 21:35:44 2017 Return-path: Envelope-to: gllmg-musl@m.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by blaine.gmane.org with smtp (Exim 4.84_2) (envelope-from ) id 1dOUMp-0006d4-8I for gllmg-musl@m.gmane.org; Fri, 23 Jun 2017 21:35:43 +0200 Original-Received: (qmail 32234 invoked by uid 550); 23 Jun 2017 19:35:45 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Original-Received: (qmail 32215 invoked from network); 23 Jun 2017 19:35:45 -0000 Content-Disposition: inline In-Reply-To: Original-Sender: Rich Felker Xref: news.gmane.org gmane.linux.lib.musl.general:11575 Archived-At: On Wed, Jun 21, 2017 at 10:53:13AM -0400, David Edelsohn wrote: > The following two patches are a start at single instruction math > functions for PowerPC64 architecture. Although PPC64LE Linux and > ELFv2 ABI require Power8 as the minimum architecture, I have added > guards that fallback to C code for earlier architectures. Indeed, musl uses the ELFv2 ABI (minus its gratuitous mandate of minimum ISA level) for both little and big endian powerpc64, and I think we have users of both (people running it on old powerbooks, etc.). Am I reading correctly that sqrt, fma, and fabs are available even in the lowest powerpc64 ISA, and don't need preprocessor conditionals? Rich