From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46461) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dFddp-0000II-IB for qemu-devel@nongnu.org; Tue, 30 May 2017 05:40:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dFddo-0001pl-PM for qemu-devel@nongnu.org; Tue, 30 May 2017 05:40:41 -0400 Received: from mail-wm0-x230.google.com ([2a00:1450:400c:c09::230]:36300) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1dFddi-0001pP-Uc for qemu-devel@nongnu.org; Tue, 30 May 2017 05:40:40 -0400 Received: by mail-wm0-x230.google.com with SMTP id 7so84352672wmo.1 for ; Tue, 30 May 2017 02:40:34 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: <87pofj8kek.fsf@linaro.org> From: Peter Maydell Date: Tue, 30 May 2017 10:40:13 +0100 Message-ID: Content-Type: text/plain; charset="UTF-8" Subject: Re: [Qemu-devel] Future of SoftFloat use in QEMU List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Richard Henderson Cc: =?UTF-8?B?QWxleCBCZW5uw6ll?= , Bharata B Rao , Aurelien Jarno , Aleksandar Markovic , Pranith Kumar , qemu-devel On 9 May 2017 at 02:56, Richard Henderson wrote: > Another possibility is the code that's shared between the linux kernel > (include/math-emu) and glibc (soft-fp). The glibc version has support for > f16 while the kernel doesn't. But the glibc version is LGPL 2.1, which I'd > expect to be ok. > > It is mildly nasty in that it's a collection of macros, but that's how we > managed really good performance with the compiler tech of 15 years ago. On > the other hand, it would be fairly easy to adjust the support macros to > achive source compatibility with our current code. Having tangled with that collection of macros 15 years ago I definitely can't recommend it ;-) thanks -- PMM