From patchwork Wed Jan 31 07:27:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: gaosong X-Patchwork-Id: 13538853 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 95C65C47258 for ; Wed, 31 Jan 2024 07:28:25 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rV50m-00012l-BU; Wed, 31 Jan 2024 02:27:56 -0500 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 1rV50j-00012b-6r for qemu-devel@nongnu.org; Wed, 31 Jan 2024 02:27:53 -0500 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rV50g-0007Sl-H0 for qemu-devel@nongnu.org; Wed, 31 Jan 2024 02:27:52 -0500 Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8Bxnutt9rllBNAIAA--.26387S3; Wed, 31 Jan 2024 15:27:41 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8BxVMxs9rllU7kpAA--.35001S2; Wed, 31 Jan 2024 15:27:40 +0800 (CST) From: Song Gao To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, c@jia.je, philmd@redhat.com, git@xen0n.name, maobibo@loongson.cn Subject: [PATCH] tcg: Fixes set const_args[i] wrong value when instructions imm is 0 Date: Wed, 31 Jan 2024 15:27:39 +0800 Message-Id: <20240131072740.2569850-1-gaosong@loongson.cn> X-Mailer: git-send-email 2.39.1 MIME-Version: 1.0 X-CM-TRANSID: AQAAf8BxVMxs9rllU7kpAA--.35001S2 X-CM-SenderInfo: 5jdr20tqj6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== 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, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org It seems that tcg_reg_alloc_op() set const_args[i] wrong value when instructions imm is 0. The LoongArch tcg_out_vec_op() cmp_vec use the wrong const_args[2]. e.g The wrong const_args[2] is 0. IN: vslti.w v5, v4, 0x0 OUT: vslt.w v1, v1, v0 The right const_args[2] is 1. IN: vslti.w v5, v4, 0x0 OUT: vslti.w v1, v1, 0x0 Fixes: https://gitlab.com/qemu-project/qemu/-/issues/2136 Signed-off-by: Song Gao --- tcg/tcg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tcg/tcg.c b/tcg/tcg.c index e2c38f6d11..5b290123bc 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -4808,7 +4808,7 @@ static void tcg_reg_alloc_op(TCGContext *s, const TCGOp *op) arg_ct = &def->args_ct[i]; ts = arg_temp(arg); - if (ts->val_type == TEMP_VAL_CONST + if ((ts->val_type == TEMP_VAL_CONST || ts->kind == TEMP_CONST) && tcg_target_const_match(ts->val, ts->type, arg_ct->ct, TCGOP_VECE(op))) { /* constant is OK for instruction */ const_args[i] = 1;