From nobody Tue Feb 10 21:59:09 2026 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 1663401814029130.2445658033762; Sat, 17 Sep 2022 01:03:34 -0700 (PDT) Received: from localhost ([::1]:39076 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oZSnT-0000Kp-3x for importer@patchew.org; Sat, 17 Sep 2022 04:03:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39736) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oZSk3-0006Xe-6d for qemu-devel@nongnu.org; Sat, 17 Sep 2022 03:59:59 -0400 Received: from mail.loongson.cn ([114.242.206.163]:57650 helo=loongson.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oZSk0-0008Sh-6E for qemu-devel@nongnu.org; Sat, 17 Sep 2022 03:59:58 -0400 Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8DxBOJ2fiVjHQccAA--.40868S6; Sat, 17 Sep 2022 15:59:51 +0800 (CST) From: Song Gao To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, peter.maydell@linaro.org, alex.bennee@linaro.org, gaosong@loongson.cn, maobibo@loongson.cn, yangxiaojuan@loongson.cn Subject: [PATCH 4/5] target/loongarch: flogb_{s/d} add set float_flag_divbyzero Date: Sat, 17 Sep 2022 15:59:49 +0800 Message-Id: <20220917075950.1412309-5-gaosong@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220917075950.1412309-1-gaosong@loongson.cn> References: <20220917075950.1412309-1-gaosong@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: AQAAf8DxBOJ2fiVjHQccAA--.40868S6 X-Coremail-Antispam: 1UD129KBjvJXoW7Cw4fuFykCr1kKrWxAF45GFg_yoW8WrW5pr WfuFW3trW8XFZ7Za93A39Yqr45X3y8GrWIvrnav3yrtr4UXr4Dur4SgasF9Fy5XryUJr1Y qFsYyrW7GF45XrDanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnUUvcSsGvfC2KfnxnUUI43ZEXa7xR_UUUUUUUUU== X-CM-SenderInfo: 5jdr20tqj6z05rqj20fqof0/ 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=114.242.206.163; envelope-from=gaosong@loongson.cn; helo=loongson.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham 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: 1663401815224100002 Content-Type: text/plain; charset="utf-8" if fj =3D=3D0 or fj =3D=3D INT32_MIN/INT64_MIN, LoongArch host set fcsr cau= se exception FP_DIV0, So we need set exception flags float_flagdivbyzero if fj =3D=3D0. Signed-off-by: Song Gao --- target/loongarch/fpu_helper.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/target/loongarch/fpu_helper.c b/target/loongarch/fpu_helper.c index 1a24667eaf..8ddfbd1abd 100644 --- a/target/loongarch/fpu_helper.c +++ b/target/loongarch/fpu_helper.c @@ -322,6 +322,13 @@ uint64_t helper_flogb_s(CPULoongArchState *env, uint64= _t fj) fp =3D float32_log2((uint32_t)fj, status); fd =3D nanbox_s(float32_round_to_int(fp, status)); set_float_rounding_mode(old_mode, status); + /* + * LoongArch host if fj =3D=3D 0 or INT32_MIN , set the fcsr cause FP_= DIV0 + * so we need set exception flags float_flag_divbyzero. + */ + if (((uint32_t)fj =3D=3D 0) | ((uint32_t)fj =3D=3D INT32_MIN )) { + set_float_exception_flags(float_flag_divbyzero, status); + } update_fcsr0_mask(env, GETPC(), float_flag_inexact); return fd; } @@ -336,6 +343,13 @@ uint64_t helper_flogb_d(CPULoongArchState *env, uint64= _t fj) fd =3D float64_log2(fj, status); fd =3D float64_round_to_int(fd, status); set_float_rounding_mode(old_mode, status); + /* + * LoongArch host if fj =3D=3D 0 or INT64_MIN , set the fcsr cause FP_= DIV0 + * so we need set exception flags float_flag_divbyzero. + */ + if ( (fj =3D=3D 0) | (fj =3D=3D INT64_MIN)) { + set_float_exception_flags(float_flag_divbyzero, status); + } update_fcsr0_mask(env, GETPC(), float_flag_inexact); return fd; } --=20 2.31.1