From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggsout.gnu.org ([209.51.188.92]:56811 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gfY6q-0003eJ-G5 for qemu-devel@nongnu.org; Fri, 04 Jan 2019 17:38:33 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gfY6p-0001m1-5U for qemu-devel@nongnu.org; Fri, 04 Jan 2019 17:38:32 -0500 Received: from mail-it1-x133.google.com ([2607:f8b0:4864:20::133]:38742) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gfY6p-0001lg-0h for qemu-devel@nongnu.org; Fri, 04 Jan 2019 17:38:31 -0500 Received: by mail-it1-x133.google.com with SMTP id h65so3456414ith.3 for ; Fri, 04 Jan 2019 14:38:30 -0800 (PST) References: <945511ac-d99a-d483-12a2-e6ad4dda09c2@linaro.org> <38b906b7-56a6-a0dc-95f3-365452b59099@linaro.org> <85031ff4-cc90-32f7-1ec4-e342a5d52f34@linaro.org> From: Richard Henderson Message-ID: Date: Sat, 5 Jan 2019 08:38:22 +1000 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] AVX support for TCG List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Nick Renieris Cc: QEMU Developers On 1/5/19 8:33 AM, Nick Renieris wrote: > I know host ABI's can differ like that, but I don't understand why > that should matter. Everything (TCG compiler included) is compiled > with the same way, right? For the host arch. No, not all of the pieces are compiled the same way. TCG generates machine instructions to perform a call from generated code into compiler generated code. So TCG needs to know about the host compiler ABI. r~