From patchwork Fri Jun 3 18:43:12 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aleksandar Markovic X-Patchwork-Id: 9153915 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 5A28D6082E for ; Fri, 3 Jun 2016 18:50:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4FD2827F3E for ; Fri, 3 Jun 2016 18:50:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4401C28334; Fri, 3 Jun 2016 18:50:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id BDD4427F3E for ; Fri, 3 Jun 2016 18:50:08 +0000 (UTC) Received: from localhost ([::1]:57217 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b8uAZ-0006Pm-Us for patchwork-qemu-devel@patchwork.kernel.org; Fri, 03 Jun 2016 14:50:07 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42213) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b8u5a-00022M-Dd for qemu-devel@nongnu.org; Fri, 03 Jun 2016 14:44:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b8u5U-0007e5-A8 for qemu-devel@nongnu.org; Fri, 03 Jun 2016 14:44:57 -0400 Received: from mx2.rt-rk.com ([89.216.37.149]:39769 helo=mail.rt-rk.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b8u5U-0007dp-31 for qemu-devel@nongnu.org; Fri, 03 Jun 2016 14:44:52 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.rt-rk.com (Postfix) with ESMTP id 1EBF81A47B3; Fri, 3 Jun 2016 20:44:50 +0200 (CEST) X-Virus-Scanned: amavisd-new at rt-rk.com Received: from rtrkw197-lin.domain.local (rtrkw197-lin.domain.local [10.10.13.82]) by mail.rt-rk.com (Postfix) with ESMTPSA id 07C321A47B0; Fri, 3 Jun 2016 20:44:50 +0200 (CEST) From: Aleksandar Markovic To: qemu-devel@nongnu.org, leon.alrae@imgtec.com, petar.jovanovic@imgtec.com, miodrag.dinic@imgtec.com, aleksandar.markovic@imgtec.com Date: Fri, 3 Jun 2016 20:43:12 +0200 Message-Id: <1464979398-16838-7-git-send-email-aleksandar.markovic@rt-rk.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1464979398-16838-1-git-send-email-aleksandar.markovic@rt-rk.com> References: <1464979398-16838-1-git-send-email-aleksandar.markovic@rt-rk.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 89.216.37.149 Subject: [Qemu-devel] [PATCH v8 6/9] target-mips: Activate IEEE 754-2008 signaling NaN bit meaning for MSA X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Aleksandar Markovic Function msa_reset() is updated so that flag snan_bit_is_one is properly set to 0. By applying this patch, a number of incorrect MSA behaviors that require IEEE 754-2008 compliance will be fixed. Those are behaviors that (up to the moment of applying this patch) did not get the desired functionality from SoftFloat library with respect to distinguishing between quiet and signaling NaN, getting default NaN values (both quiet and signaling), establishing if a floating point number is NaN or not, etc. Two examples: * FMAX, FMIN will now correctly detect and propagate NaNs. * FCLASS.D ans FCLASS.S will now correcty detect NaN flavors. Signed-off-by: Aleksandar Markovic Reviewed-by: Leon Alrae --- target-mips/translate_init.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/target-mips/translate_init.c b/target-mips/translate_init.c index e81a831..a37d8bb 100644 --- a/target-mips/translate_init.c +++ b/target-mips/translate_init.c @@ -893,5 +893,6 @@ static void msa_reset(CPUMIPSState *env) /* clear float_status nan mode */ set_default_nan_mode(0, &env->active_tc.msa_fp_status); - set_snan_bit_is_one(1, &env->active_tc.msa_fp_status); + /* set proper signanling bit meaning ("1" means "quiet") */ + set_snan_bit_is_one(0, &env->active_tc.msa_fp_status); }