From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5DB27D5B84C for ; Tue, 29 Oct 2024 06:12:41 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t5fRP-0001UX-EQ; Tue, 29 Oct 2024 02:10:55 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t5fR5-0001N7-US for qemu-devel@nongnu.org; Tue, 29 Oct 2024 02:10:39 -0400 Received: from mail-wr1-x429.google.com ([2a00:1450:4864:20::429]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1t5fR3-00077M-BP for qemu-devel@nongnu.org; Tue, 29 Oct 2024 02:10:35 -0400 Received: by mail-wr1-x429.google.com with SMTP id ffacd0b85a97d-37d49a7207cso3591458f8f.0 for ; Mon, 28 Oct 2024 23:10:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1730182231; x=1730787031; darn=nongnu.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=dKWEdO2S5aw/JSzKgSCFRrq4eJQgzUdy3Wu8jQfmul0=; b=nARUA9+dwVq4Rr2YuIm+6mCt0MUMYQi+BBk1iCywGVGXIsM6U3XmOr+YNVB0tGJfdk VfFdj8+p40Y6b+2TZ5Pi6SQdntcjR18fvV238zeOSeroQpBG55pIEJniOPNQK6Muw7co 7UVng2jzQ57XxyAqD0WgZkfK992XLMMfrJi00Vl+tOUhFSLzTNC1x+a3B59TyPjM94ak qtrmzqiZYBqHPqjqON/4ZE8ufIjfgJNeJEnXdWpAKp+80LxVDuj5bLWVw+MKo0tXHyc+ c+PWdynjl68jQnIaNKhr+FktsjyIVCm2NR4a33PZ9rr6HB14spZ4od9fdcsfsL1WmIya jgQA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730182231; x=1730787031; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=dKWEdO2S5aw/JSzKgSCFRrq4eJQgzUdy3Wu8jQfmul0=; b=qVodYfHp++JtjJZZtZvhUV0DbM0hmW5ehBA8sZvjV0vdzq7U0MFMrDmtSrGCthw5YN C3ij09yCprl+cq24Csm7W9ZIG5Xkk/nR7pDWOEUYHv6I0UnxvgjQPQ63t75HLyK7mg66 4zG2KSBRY2uHdEPjPxkiNOsRJEAmej0oe9SISe6jOM+9Ft4dH86+ZBB6O7OVNXVZFD2j XQ2ZOlV8BdvXvLrmP2fZuRN2r2P0wggLd0jUyGIcJHF3bLbGkNevpZ86I0GFRKOCPK+/ 6iBr9YrjXB4+KUCA1rqyMPyLg2WL/7daFLlooAG3KjN6u0Ve25oKx2vkPGV6H9A9GRCJ 0fbA== X-Forwarded-Encrypted: i=1; AJvYcCUM11A5yhEzM7bslYfiWxJp+1qFb3/gyXNwjcwGUQa/Aob+mfAh2c/7R6FXRUKUeNGr4XkG5gBTjmyD@nongnu.org X-Gm-Message-State: AOJu0YxrjLgXEV0o63/WLcwlRfZvGKTnGP7Tx0GxdMxqpOcmJsm/6KGc dAUuQrt2BrP03yznRbWOBdH8jZxM1eVAyPsnvMaIlQ9Y73al2SBTmDk2L7j75io= X-Google-Smtp-Source: AGHT+IGGy0H/FlmH2GUISdMS+4yeXD6bznqQY22mE1VDSljWmF9uQ/5LJb5oAfoIAEYon5L6JvB13A== X-Received: by 2002:a05:6000:104a:b0:37d:377f:da4f with SMTP id ffacd0b85a97d-38061159595mr7630058f8f.27.1730182230553; Mon, 28 Oct 2024 23:10:30 -0700 (PDT) Received: from [192.168.21.227] ([90.197.151.65]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-38058b70bc1sm11560253f8f.70.2024.10.28.23.10.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 28 Oct 2024 23:10:30 -0700 (PDT) Message-ID: Date: Mon, 28 Oct 2024 12:10:34 +0000 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 03/21] target/arm: Explicitly set 2-NaN propagation rule To: Peter Maydell , qemu-arm@nongnu.org, qemu-devel@nongnu.org Cc: =?UTF-8?Q?Alex_Benn=C3=A9e?= , =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= , Song Gao , Eduardo Habkost , "Edgar E. Iglesias" , Jiaxun Yang , Aleksandar Rikalo , Stafford Horne , Nicholas Piggin , Daniel Henrique Barboza , Yoshinori Sato , David Hildenbrand , Ilya Leoshkevich , Thomas Huth , Mark Cave-Ayland , Artyom Tarasenko , Max Filippov , qemu-ppc@nongnu.org, qemu-s390x@nongnu.org References: <20241025141254.2141506-1-peter.maydell@linaro.org> <20241025141254.2141506-4-peter.maydell@linaro.org> Content-Language: en-US From: Richard Henderson In-Reply-To: <20241025141254.2141506-4-peter.maydell@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2a00:1450:4864:20::429; envelope-from=richard.henderson@linaro.org; helo=mail-wr1-x429.google.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, DATE_IN_PAST_12_24=1.049, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 10/25/24 15:12, Peter Maydell wrote: > Set the 2-NaN propagation rule explicitly in the float_status words > we use. We wrap this plus the pre-existing setting of the > tininess-before-rounding flag in a new function > arm_set_default_fp_behaviours() to avoid repetition, since we have a > lot of float_status words at this point. > > The situation with FPA11 emulation in linux-user is a little odd, and > arguably "correct" behaviour there would be to exactly match a real > Linux kernel's FPA11 emulation. However FPA11 emulation is > essentially dead at this point and so it seems better to continue > with QEMU's current behaviour and leave a comment describing the > situation. > > Signed-off-by: Peter Maydell > --- > linux-user/arm/nwfpe/fpa11.c | 18 ++++++++++++++++++ > target/arm/cpu.c | 25 +++++++++++++++++-------- > fpu/softfloat-specialize.c.inc | 13 ++----------- > 3 files changed, 37 insertions(+), 19 deletions(-) Reviewed-by: Richard Henderson r~