From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4C9AFC433F5 for ; Fri, 20 May 2022 17:46:31 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4L4Z0P6bbdz3blV for ; Sat, 21 May 2022 03:46:29 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.crashing.org (client-ip=63.228.1.57; helo=gate.crashing.org; envelope-from=segher@kernel.crashing.org; receiver=) Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) by lists.ozlabs.org (Postfix) with ESMTP id 4L4Yzv2JVBz2xDY for ; Sat, 21 May 2022 03:46:01 +1000 (AEST) Received: from gate.crashing.org (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id 24KHgpwc017781; Fri, 20 May 2022 12:42:51 -0500 Received: (from segher@localhost) by gate.crashing.org (8.14.1/8.14.1/Submit) id 24KHgov5017779; Fri, 20 May 2022 12:42:50 -0500 X-Authentication-Warning: gate.crashing.org: segher set sender to segher@kernel.crashing.org using -f Date: Fri, 20 May 2022 12:42:50 -0500 From: Segher Boessenkool To: Paul E Murphy Subject: Re: [RFC Linux patch] powerpc: add documentation for HWCAPs Message-ID: <20220520174250.GG25951@gate.crashing.org> References: <20220520051528.98097-1-npiggin@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: gcc@gcc.gnu.org, libc-alpha@sourceware.org, linuxppc-dev@lists.ozlabs.org, Nicholas Piggin Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, May 20, 2022 at 09:21:43AM -0500, Paul E Murphy wrote: > >+PPC_FEATURE_HAS_ALTIVEC > >+ Vector (aka Altivec, VSX) facility is available. > > I think "(aka Altivec, VSX)" might be more accurately stated as "(aka > Altivec)"? "Also known as AltiVec or VMX", yes. > >+PPC_FEATURE_HAS_DFP > >+ DFP facility is available. > > Maybe something like "Decimal floating point instructions are available > to userspace. Individual instruction availability is dependent on the > reported architecture version."? That is true for *all* facilities, and even the base architecture! This is not only hypothetical, either. Segher