From nobody Fri May 10 21:37:19 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 166497287072237.04694466970409; Wed, 5 Oct 2022 05:27:50 -0700 (PDT) Received: from localhost ([::1]:51756 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1og3V7-0002s0-4G for importer@patchew.org; Wed, 05 Oct 2022 08:27:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53592) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1og3Me-00088v-Iz; Wed, 05 Oct 2022 08:19:04 -0400 Received: from [200.168.210.66] (port=33285 helo=outlook.eldorado.org.br) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1og3Ma-0001Vc-25; Wed, 05 Oct 2022 08:19:03 -0400 Received: from p9ibm ([10.10.71.235]) by outlook.eldorado.org.br over TLS secured channel with Microsoft SMTPSVC(8.5.9600.16384); Wed, 5 Oct 2022 09:18:52 -0300 Received: from eldorado.org.br (unknown [10.10.70.45]) by p9ibm (Postfix) with ESMTP id 75A438002A8; Wed, 5 Oct 2022 09:18:51 -0300 (-03) From: =?UTF-8?q?V=C3=ADctor=20Colombo?= To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org Cc: clg@kaod.org, danielhb413@gmail.com, david@gibson.dropbear.id.au, groug@kaod.org, richard.henderson@linaro.org, victor.colombo@eldorado.org.br, matheus.ferst@eldorado.org.br, lucas.araujo@eldorado.org.br, leandro.lupori@eldorado.org.br, lucas.coutinho@eldorado.org.br Subject: [PATCH] target/ppc: Fix xvcmp* clearing FI bit Date: Wed, 5 Oct 2022 09:15:51 -0300 Message-Id: <20221005121551.27957-1-victor.colombo@eldorado.org.br> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-OriginalArrivalTime: 05 Oct 2022 12:18:52.0078 (UTC) FILETIME=[A16344E0:01D8D8B4] X-Host-Lookup-Failed: Reverse DNS lookup failed for 200.168.210.66 (failed) Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=200.168.210.66; envelope-from=victor.colombo@eldorado.org.br; helo=outlook.eldorado.org.br 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, RDNS_NONE=0.793, 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1664972873380100003 Vector instructions in general are not supposed to change the FI bit. However, xvcmp* instructions are calling gen_helper_float_check_status, which is leading to a cleared FI flag where it should be kept unchanged. As helper_float_check_status only affects inexact, overflow and underflow, and the xvcmp* instructions don't change these flags, this issue can be fixed by removing the call to helper_float_check_status. By doing this, the FI bit in FPSCR will be preserved as expected. Fixes: 00084a25adf ("target/ppc: introduce separate VSX_CMP macro for xvcmp= * instructions") Signed-off-by: V=C3=ADctor Colombo Reviewed-by: Richard Henderson --- target/ppc/translate/vsx-impl.c.inc | 1 - 1 file changed, 1 deletion(-) diff --git a/target/ppc/translate/vsx-impl.c.inc b/target/ppc/translate/vsx= -impl.c.inc index 7acdbceec4..e6e5c45ffd 100644 --- a/target/ppc/translate/vsx-impl.c.inc +++ b/target/ppc/translate/vsx-impl.c.inc @@ -810,7 +810,6 @@ static void gen_##name(DisasContext *ctx) = \ gen_helper_##name(ignored, cpu_env, xt, xa, xb); = \ tcg_temp_free_i32(ignored); = \ } = \ - gen_helper_float_check_status(cpu_env); = \ tcg_temp_free_ptr(xt); = \ tcg_temp_free_ptr(xa); = \ tcg_temp_free_ptr(xb); = \ --=20 2.25.1