From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS3215 2.6.0.0/16 X-Spam-Status: No, score=-3.8 required=3.0 tests=AWL,BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from sourceware.org (server2.sourceware.org [IPv6:2620:52:3:1:0:246e:9693:128c]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id 52E211F8C6 for ; Thu, 1 Jul 2021 22:40:35 +0000 (UTC) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 3DEC739724AB for ; Thu, 1 Jul 2021 22:40:34 +0000 (GMT) Received: from esa2.mentor.iphmx.com (esa2.mentor.iphmx.com [68.232.141.98]) by sourceware.org (Postfix) with ESMTPS id ACDEB3851C0D for ; Thu, 1 Jul 2021 22:40:22 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org ACDEB3851C0D Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=codesourcery.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=mentor.com IronPort-SDR: dtFY0axcARMoNzeSDqNJ7d+buoFaquRzUIgEWAo98wTvSLuacDMdb9sJZtmZZ/6RrlxwPrYV6D nxkA2II34nQpVyCYsioojX5XlpF8N6iR/60hxJEnFS8A6OOeuH8JYuqIwyKr8GxBMJss2IWOi9 7noK99CgN/IU4mTIODZHB+E6+9FWO4pY1lt2ZYg6xEYV5XGVVR+m6ws0UTaaCDXOAnUADNsIhq SODRQBRnVMB0SYzyvao6hb7uOEF8rel+2j4M8WNNaZHl3WEcGMKbE+gXFYJU7814tUhh+EEaqt IGQ= X-IronPort-AV: E=Sophos;i="5.83,315,1616486400"; d="scan'208";a="63082992" Received: from orw-gwy-01-in.mentorg.com ([192.94.38.165]) by esa2.mentor.iphmx.com with ESMTP; 01 Jul 2021 14:40:21 -0800 IronPort-SDR: e+b2i9Hchc00CzjCuCVtTxEeAS1P8kDECDK00GhIfVPgocIwK4VVc1yZwMJe9Eg6yYdpKJQsZ6 wrVT99fskHToi1UeBL3y7OEQqYy9msKIhnUySZSTIK8Rkwj5WmXr2dOVn8LCvZ/dd3WftTJFtI oWk9iXIWQE+HBsrX7hYx0LUpqD8nmFD1ChDnmZ+aCYACKmJmUMBhSQ8P0F8eCj/LVKz30Cg3Kb zsXe5SPTW3HVKsxZcYmXG5RKXFLdP5v9qNxVvXfsZASWBskRIBXAp9FVCMbjrDGpkE859rWSif w6k= Date: Thu, 1 Jul 2021 22:40:16 +0000 From: Joseph Myers X-X-Sender: jsm28@digraph.polyomino.org.uk To: "H.J. Lu" Subject: Re: [PATCH] Add optional _Float16 support In-Reply-To: Message-ID: References: <20210701210537.51272-1-hjl.tools@gmail.com> User-Agent: Alpine 2.22 (DEB 394 2020-01-19) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" X-Originating-IP: [137.202.0.90] X-ClientProxiedBy: SVR-IES-MBX-08.mgc.mentorg.com (139.181.222.8) To svr-ies-mbx-01.mgc.mentorg.com (139.181.222.1) 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: , Cc: llvm-dev@lists.llvm.org, GCC Patches , GNU C Library , IA32 System V Application Binary Interface Errors-To: libc-alpha-bounces+e=80x24.org@sourceware.org Sender: "Libc-alpha" On Thu, 1 Jul 2021, H.J. Lu wrote: > BTW, _Float16 software emulation may require more than just SSE > since we need to do _Float16 load and store with XMM registers. > There is no 16bit load/store for XMM registers without AVX512FP16. You should be able to make the move go via general-purpose registers (for example) if you can't do a direct 16-bit load/store for XMM registers. -- Joseph S. Myers joseph@codesourcery.com