From nobody Sat Nov 15 17:21:17 2025 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 1748920299562864.5054856985914; Mon, 2 Jun 2025 20:11:39 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uMI3e-0004Ri-Fj; Mon, 02 Jun 2025 23:11:22 -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 1uMI3c-0004Ni-Et; Mon, 02 Jun 2025 23:11:20 -0400 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uMI3a-0007iR-75; Mon, 02 Jun 2025 23:11:20 -0400 Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8CxNHDQZz5odZYJAQ--.31647S3; Tue, 03 Jun 2025 11:11:12 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by front1 (Coremail) with SMTP id qMiowMAxj8XPZz5o0g4GAQ--.23246S2; Tue, 03 Jun 2025 11:11:11 +0800 (CST) From: Song Gao To: qemu-devel@nongnu.org, richard.henderson@linaro.org Cc: maobibo@loongson.cn, philmd@linaro.org, lorenz.hetterich@cispa.de, qemu-stable@nongnu.org Subject: [PATCH v2] target/loongarch: fix vldi/xvldi raise wrong error Date: Tue, 3 Jun 2025 10:48:47 +0800 Message-Id: <20250603024847.350568-1-gaosong@loongson.cn> X-Mailer: git-send-email 2.39.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowMAxj8XPZz5o0g4GAQ--.23246S2 X-CM-SenderInfo: 5jdr20tqj6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== 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=mail.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, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=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-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1748920303249116600 Content-Type: text/plain; charset="utf-8" on qemu we got an aborted error ** ERROR:../target/loongarch/tcg/insn_trans/trans_vec.c.inc:3574:vldi_get_valu= e: code should not be reached Bail out! ERROR:../target/loongarch/tcg/insn_trans/trans_vec.c.inc:3574:vld= i_get_value: code should not be reached Aborted (core dumped) bu on 3A600/3A5000 we got a "Illegal instruction" error. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2971 Signed-off-by: Song Gao --- target/loongarch/tcg/insn_trans/trans_vec.c.inc | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/target/loongarch/tcg/insn_trans/trans_vec.c.inc b/target/loong= arch/tcg/insn_trans/trans_vec.c.inc index dff92772ad..cadc00e75e 100644 --- a/target/loongarch/tcg/insn_trans/trans_vec.c.inc +++ b/target/loongarch/tcg/insn_trans/trans_vec.c.inc @@ -3465,7 +3465,7 @@ TRANS(xvmsknz_b, LASX, gen_xx, gen_helper_vmsknz_b) static uint64_t vldi_get_value(DisasContext *ctx, uint32_t imm) { int mode; - uint64_t data, t; + uint64_t data =3D 0, t; =20 /* * imm bit [11:8] is mode, mode value is 0-12. @@ -3570,8 +3570,7 @@ static uint64_t vldi_get_value(DisasContext *ctx, uin= t32_t imm) } break; default: - generate_exception(ctx, EXCCODE_INE); - g_assert_not_reached(); + data =3D -1; } return data; } @@ -3579,7 +3578,12 @@ static uint64_t vldi_get_value(DisasContext *ctx, ui= nt32_t imm) static bool gen_vldi(DisasContext *ctx, arg_vldi *a, uint32_t oprsz) { int sel, vece; - uint64_t value; + uint64_t value =3D vldi_get_value(ctx, a->imm); + + if (value =3D=3D -1){ + generate_exception(ctx, EXCCODE_INE); + return true; + } =20 if (!check_vec(ctx, oprsz)) { return true; @@ -3588,7 +3592,6 @@ static bool gen_vldi(DisasContext *ctx, arg_vldi *a, = uint32_t oprsz) sel =3D (a->imm >> 12) & 0x1; =20 if (sel) { - value =3D vldi_get_value(ctx, a->imm); vece =3D MO_64; } else { value =3D ((int32_t)(a->imm << 22)) >> 22; --=20 2.34.1