From patchwork Tue Apr 12 12:56:41 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Maydell X-Patchwork-Id: 90789 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (unknown [140.186.70.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 3BBF3B6EF1 for ; Tue, 12 Apr 2011 23:22:09 +1000 (EST) Received: from localhost ([::1]:54224 helo=lists2.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Q9dXf-0002ao-Lu for incoming@patchwork.ozlabs.org; Tue, 12 Apr 2011 09:22:03 -0400 Received: from eggs.gnu.org ([140.186.70.92]:43432) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Q9dSl-000521-CW for qemu-devel@nongnu.org; Tue, 12 Apr 2011 09:17:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Q9dSk-0008Ak-6r for qemu-devel@nongnu.org; Tue, 12 Apr 2011 09:16:59 -0400 Received: from mnementh.archaic.org.uk ([81.2.115.146]:45562) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Q9dSj-0008AY-VC for qemu-devel@nongnu.org; Tue, 12 Apr 2011 09:16:58 -0400 Received: from pm215 by mnementh.archaic.org.uk with local (Exim 4.72) (envelope-from ) id 1Q9d97-0004ZP-AK; Tue, 12 Apr 2011 13:56:41 +0100 From: Peter Maydell To: qemu-devel@nongnu.org Date: Tue, 12 Apr 2011 13:56:41 +0100 Message-Id: <1302613001-17540-3-git-send-email-peter.maydell@linaro.org> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1302613001-17540-1-git-send-email-peter.maydell@linaro.org> References: <1302613001-17540-1-git-send-email-peter.maydell@linaro.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 81.2.115.146 Cc: patches@linaro.org Subject: [Qemu-devel] [PATCH 2/2] target-arm: Detect tininess before rounding for FP operations X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org The ARM architecture mandates that we detect tininess before rounding, so set the softfloat fp_status up appropriately. Signed-off-by: Peter Maydell --- target-arm/helper.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/target-arm/helper.c b/target-arm/helper.c index ce9a9d8..9172fc7 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -269,6 +269,10 @@ void cpu_reset(CPUARMState *env) set_flush_to_zero(1, &env->vfp.standard_fp_status); set_flush_inputs_to_zero(1, &env->vfp.standard_fp_status); set_default_nan_mode(1, &env->vfp.standard_fp_status); + set_float_detect_tininess(float_tininess_before_rounding, + &env->vfp.fp_status); + set_float_detect_tininess(float_tininess_before_rounding, + &env->vfp.standard_fp_status); tlb_flush(env, 1); }