From nobody Tue Feb 10 05:46:58 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 1770070171411227.33415383665647; Mon, 2 Feb 2026 14:09:31 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vn26M-0004x9-1C; Mon, 02 Feb 2026 17:09:01 -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 1vn25u-0004rx-JA; Mon, 02 Feb 2026 17:08:31 -0500 Received: from isrv.corpit.ru ([212.248.84.144]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vn25t-0002bO-2m; Mon, 02 Feb 2026 17:08:30 -0500 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 744831852B6; Tue, 03 Feb 2026 01:07:34 +0300 (MSK) Received: from think4mjt.tls.msk.ru (mjtthink.wg.tls.msk.ru [192.168.177.146]) by tsrv.corpit.ru (Postfix) with ESMTP id 5326435B3C9; Tue, 03 Feb 2026 01:08:16 +0300 (MSK) From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Richard Henderson , Zhijin Zeng , Michael Tokarev Subject: [Stable-10.2.1 09/56] tcg/riscv: Fix TCG_REG_TMP0 clobber in tcg_gen_dup{m, i} Date: Tue, 3 Feb 2026 01:07:14 +0300 Message-ID: <20260202220805.945271-9-mjt@tls.msk.ru> X-Mailer: git-send-email 2.47.3 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=212.248.84.144; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru 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_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_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: qemu development 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: 1770070173995154100 Content-Type: text/plain; charset="utf-8" From: Richard Henderson TCG_REG_TMP0 may be used by set_vtype* to load the vtype parameter, so delay any other use of TCG_REG_TMP0 until the correct vtype has been installed. Cc: qemu-stable@nongnu.org Fixes: d4be6ee1111 ("tcg/riscv: Implement vector mov/dup{m/i}") Reported-by: Zhijin Zeng Signed-off-by: Richard Henderson (cherry picked from commit af6db3b71310ea63a018d517ba7d79e4e014db62) Signed-off-by: Michael Tokarev diff --git a/tcg/riscv/tcg-target.c.inc b/tcg/riscv/tcg-target.c.inc index 31b9f7d87a..0967a445a3 100644 --- a/tcg/riscv/tcg-target.c.inc +++ b/tcg/riscv/tcg-target.c.inc @@ -1074,7 +1074,7 @@ static bool tcg_out_sti(TCGContext *s, TCGType type, = TCGArg val, } =20 static bool tcg_out_dup_vec(TCGContext *s, TCGType type, unsigned vece, - TCGReg dst, TCGReg src) + TCGReg dst, TCGReg src) { set_vtype_len_sew(s, type, vece); tcg_out_opc_vx(s, OPC_VMV_V_X, dst, 0, src); @@ -1082,29 +1082,34 @@ static bool tcg_out_dup_vec(TCGContext *s, TCGType = type, unsigned vece, } =20 static bool tcg_out_dupm_vec(TCGContext *s, TCGType type, unsigned vece, - TCGReg dst, TCGReg base, intptr_t offs= et) + TCGReg dst, TCGReg base, intptr_t offset) { + /* Note set_vtype* may clobber TMP0, so do that first. */ + set_vtype_len_sew(s, type, vece); tcg_out_ld(s, TCG_TYPE_REG, TCG_REG_TMP0, base, offset); - return tcg_out_dup_vec(s, type, vece, dst, TCG_REG_TMP0); + tcg_out_opc_vx(s, OPC_VMV_V_X, dst, 0, TCG_REG_TMP0); + return true; } =20 static void tcg_out_dupi_vec(TCGContext *s, TCGType type, unsigned vece, - TCGReg dst, int64_t arg) + TCGReg dst, int64_t arg) { /* Arg is replicated by VECE; extract the highest element. */ arg >>=3D (-8 << vece) & 63; =20 + /* Note set_vtype* may clobber TMP0, so do that first. */ + if (arg =3D=3D 0 || arg =3D=3D -1) { + set_vtype_len(s, type); + } else { + set_vtype_len_sew(s, type, vece); + } + if (arg >=3D -16 && arg < 16) { - if (arg =3D=3D 0 || arg =3D=3D -1) { - set_vtype_len(s, type); - } else { - set_vtype_len_sew(s, type, vece); - } tcg_out_opc_vi(s, OPC_VMV_V_I, dst, 0, arg); - return; + } else { + tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_TMP0, arg); + tcg_out_opc_vx(s, OPC_VMV_V_X, dst, 0, TCG_REG_TMP0); } - tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_TMP0, arg); - tcg_out_dup_vec(s, type, vece, dst, TCG_REG_TMP0); } =20 static void tcg_out_br(TCGContext *s, TCGLabel *l) --=20 2.47.3