From nobody Mon Feb 9 11:32:00 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1623683937; cv=none; d=zohomail.com; s=zohoarc; b=NGeqzTehMiShUqYJfgt7NA84GrZy7yL3CRtnTjnpB/m91nPoQ6MhD4/r7n2OR4xlCQ9k90pO2uCoXMCVEC6irdicapQhOu10/RCLNj0UeO3uw7BcHmkxg+0xXUE7Y4x1WrKcWtxnwhYiUa/4m37BtFVs2+DPtk07upjLZ568KP4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1623683937; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=2dgDTTiMTrmKABkAfBq5w7i1IZyicXfWam0kFYAVX4A=; b=g1cAdDeiU28SR71hLCw+kt8hpdjpbPIMwfLdhVTKKNyVwdDRP2bvImXOF4SfZu88brMNqVj/W3d5kcdIl7LsCYPDRTQCPE5lCN5fb0nEa2eRZ8+O9YFVzfe4X8/Wk6ZCQA88c9oB4MxfeNHsO7wf0atAF5UTJJXEustKIKY47zo= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; 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; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1623683937412769.1384202509842; Mon, 14 Jun 2021 08:18:57 -0700 (PDT) Received: from localhost ([::1]:59314 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lsoMZ-0000Dd-Bm for importer@patchew.org; Mon, 14 Jun 2021 11:18:55 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47230) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lsoEP-0000Sj-KL for qemu-devel@nongnu.org; Mon, 14 Jun 2021 11:10:29 -0400 Received: from mail-wr1-x42a.google.com ([2a00:1450:4864:20::42a]:35385) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lsoED-00008B-W3 for qemu-devel@nongnu.org; Mon, 14 Jun 2021 11:10:29 -0400 Received: by mail-wr1-x42a.google.com with SMTP id m18so14940987wrv.2 for ; Mon, 14 Jun 2021 08:10:16 -0700 (PDT) Received: from orth.archaic.org.uk (orth.archaic.org.uk. [81.2.115.148]) by smtp.gmail.com with ESMTPSA id b8sm20865639wmd.35.2021.06.14.08.10.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Jun 2021 08:10:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=2dgDTTiMTrmKABkAfBq5w7i1IZyicXfWam0kFYAVX4A=; b=wlDee7aQN/MTi47IxqsCWMAEo0nsOZYyDq5k5ADhy3a3nBTM5FN5vgPmgs94S3n1W0 VNf33fAtj/RrjMd5w4mWBBccmmqzpLawUemYvxqTWVlyWkLxYLWVYZdYLXNGF7sKtYdD Fm9AV+beWoqyQE0ZepQZCNfkSoA+bLauZO2dE/mavzRLl9DtF/5ftxNsTvGX6k3M/785 MAeKdSowqtFrVSFewqcu6+0y2IDjgpV4SnfnNZWvokRFZnzqhcQhmEEjxmi3K0M2H4EZ JmLBA0abbuzAQs8BcEbrJdDGgpsHQWZzyaJwy544vrQZKkGNyvFmNupnmUBRg4W3ZCHY KuxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=2dgDTTiMTrmKABkAfBq5w7i1IZyicXfWam0kFYAVX4A=; b=Ry7/YIO5gu0KRt1WfD0lMVxcBeU3rokSzFSMp9T8YhLlU3vGr5BzzgkfS8fUTjs7or R0WREImycLdN7bkZA8HUcNHeekcmyf8Fn1JGBjoGZe02QsWqDVnAHHJwpLC2grb4RqO0 LGyAP2bU6s8dyAgC1ZJ8GJsbVtWDzvyRXAr/as0pR7A6NmfE0ysAjGuiy5mNdk6mYDCE 1KxE1hUry8/uTeaiflqlB636Dj3OBIGBlwtg4NCRd0dNfdi+rccRR5+OCpOKN9Y7VRvX dUDqq22z4HyTwUouYxH2H2jEitl4ZcsxFxNhesCL/oY0NaEMPyq9tRG5goAPE+/UGAaX w3hg== X-Gm-Message-State: AOAM533Paj3HNn2L7OxLiIVB+7rPw4TtYpSj3/FJPJN62/Q9nhNZ7bVe qF56oxut3XInyw6smO3s6WquNA== X-Google-Smtp-Source: ABdhPJzDtdLCLGTlODPUwmMb3/MY6348x4UHVsLbgjvU1qhBa2Nai5FS82MnfvE9UNQJTOGN+Q7wQw== X-Received: by 2002:a5d:4610:: with SMTP id t16mr18479633wrq.324.1623683415827; Mon, 14 Jun 2021 08:10:15 -0700 (PDT) From: Peter Maydell To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH v2 06/57] target/arm: Implement MVE LCTP Date: Mon, 14 Jun 2021 16:09:16 +0100 Message-Id: <20210614151007.4545-7-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210614151007.4545-1-peter.maydell@linaro.org> References: <20210614151007.4545-1-peter.maydell@linaro.org> 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=2a00:1450:4864:20::42a; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x42a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" Implement the MVE LCTP instruction. We put its decode and implementation with the other low-overhead-branch insns because although it is only present if MVE is implemented it is logically in the same group as the other LOB insns. Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson --- target/arm/t32.decode | 2 ++ target/arm/translate.c | 24 ++++++++++++++++++++++++ 2 files changed, 26 insertions(+) diff --git a/target/arm/t32.decode b/target/arm/t32.decode index 8b2c487fa7a..087e514e0ac 100644 --- a/target/arm/t32.decode +++ b/target/arm/t32.decode @@ -674,5 +674,7 @@ BL 1111 0. .......... 11.1 ............ = @branch24 DLS 1111 0 0000 100 rn:4 1110 0000 0000 0001 WLS 1111 0 0000 100 rn:4 1100 . .......... 1 imm=3D%lob_i= mm LE 1111 0 0000 0 f:1 0 1111 1100 . .......... 1 imm=3D%lob_i= mm + + LCTP 1111 0 0000 000 1111 1110 0000 0000 0001 ] } diff --git a/target/arm/translate.c b/target/arm/translate.c index f1c2074fa4a..c49561590c9 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -8191,6 +8191,30 @@ static bool trans_LE(DisasContext *s, arg_LE *a) return true; } =20 +static bool trans_LCTP(DisasContext *s, arg_LCTP *a) +{ + /* + * M-profile Loop Clear with Tail Predication. Since our implementation + * doesn't cache branch information, all we need to do is reset + * FPSCR.LTPSIZE to 4. + */ + TCGv_i32 ltpsize; + + if (!dc_isar_feature(aa32_lob, s) || + !dc_isar_feature(aa32_mve, s)) { + return false; + } + + if (!vfp_access_check(s)) { + return true; + } + + ltpsize =3D tcg_const_i32(4); + store_cpu_field(ltpsize, v7m.ltpsize); + return true; +} + + static bool op_tbranch(DisasContext *s, arg_tbranch *a, bool half) { TCGv_i32 addr, tmp; --=20 2.20.1