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 X-Spam-Level: X-Spam-Status: No, score=-8.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ACE2AC3A5A6 for ; Tue, 27 Aug 2019 04:22:00 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 7CEEF2186A for ; Tue, 27 Aug 2019 04:22:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b="BnQnXq/9" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7CEEF2186A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:46440 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i2SzX-0004E4-Ks for qemu-devel@archiver.kernel.org; Tue, 27 Aug 2019 00:21:59 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60927) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i2SyD-00037R-DK for qemu-devel@nongnu.org; Tue, 27 Aug 2019 00:20:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i2SyB-0003qF-Px for qemu-devel@nongnu.org; Tue, 27 Aug 2019 00:20:37 -0400 Received: from bilbo.ozlabs.org ([2401:3900:2:1::2]:59517 helo=ozlabs.org) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i2SyB-0003pK-2a; Tue, 27 Aug 2019 00:20:35 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 46HbJY2L4yz9sDB; Tue, 27 Aug 2019 14:20:29 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1566879629; bh=SUGGDKg6EXvOhHn+O0d/xw6obG3Q4nOgrKhf2B8rHyE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=BnQnXq/9umy0W47f2EKcmpf23ppSRFZNx4EtIfrOkk2CVk92nSA4HBL9iAQF2GXse 2GKU3c6PxkykoGIzf/MHkYnvmBIDCsldTz4c43Vb9MSnNrvAIQui9WtK3sfeCJkp9C aMPDwEcDv9l75mogaK3UbZ4GCRG1v91uJS6+rRrg= Date: Tue, 27 Aug 2019 13:41:38 +1000 From: David Gibson To: Richard Henderson Message-ID: <20190827034138.GF28081@umbus.fritz.box> References: <20190827020013.27154-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="SxgehGEc6vB0cZwN" Content-Disposition: inline In-Reply-To: <20190827020013.27154-1-richard.henderson@linaro.org> User-Agent: Mutt/1.12.1 (2019-06-15) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2401:3900:2:1::2 Subject: Re: [Qemu-devel] [PATCH] target/ppc: Set float_tininess_before_rounding at cpu reset X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-ppc@nongnu.org, qemu-devel@nongnu.org, pc@us.ibm.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --SxgehGEc6vB0cZwN Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Aug 26, 2019 at 07:00:13PM -0700, Richard Henderson wrote: > As defined in Power 3.0 section 4.4.4 "Underflow Exception", > a tiny result is detected before rounding. >=20 > Fixes: https://bugs.launchpad.net/qemu/+bug/1841491 > Reported-by: Paul Clarke > Signed-off-by: Richard Henderson Applied to ppc-for-4.2, thanks. > --- > target/ppc/translate_init.inc.c | 4 ++++ > 1 file changed, 4 insertions(+) >=20 > diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.= inc.c > index 4a21ed7289..023138c2f9 100644 > --- a/target/ppc/translate_init.inc.c > +++ b/target/ppc/translate_init.inc.c > @@ -10461,6 +10461,10 @@ static void ppc_cpu_reset(CPUState *s) > s->exception_index =3D POWERPC_EXCP_NONE; > env->error_code =3D 0; > =20 > + /* tininess for underflow is detected before rounding */ > + set_float_detect_tininess(float_tininess_before_rounding, > + &env->fp_status); > + > for (i =3D 0; i < ARRAY_SIZE(env->spr_cb); i++) { > ppc_spr_t *spr =3D &env->spr_cb[i]; > =20 --=20 David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. 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