From nobody Sun Nov 24 08:56:31 2024 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=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1726119666; cv=none; d=zohomail.com; s=zohoarc; b=Vfp+jGbfsJX7bwkOje3puqfAj+g8J8Dw0cukVnQLEhmhUMnHlAwQy2FebL8aZBpKS59vDzoMgITdT+goA7ciVxfkVe+8EArYc/PCCC1OiELzdWtAyP2PKNcko7/Sv42esV1MVL8+YKpnWW/Qc+p/vJovAWQWqIeySzhhHaolW0g= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1726119666; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=98jPE8Nm5XmnYTmie79vaM5ax8offv0h+SJp0+g/oio=; b=ib6vMMw3c+V0CQkCLB8BCss7C9phd7taMRcwv9RNS4p1f/C7M3/c528TBzv/zlwBxJ/HN1Z/d+2Cin9eldTK6MD3FW014IyPMv7N54m0JXARBfPjoVDqs1s0d8uu8WZvSKjuixU7hW43M1EPUaJCZ4u+Ozw5Rdcoghsj2+VF8vw= 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 1726119666622449.62747899069666; Wed, 11 Sep 2024 22:41:06 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1socPC-0008CY-2F; Thu, 12 Sep 2024 01:30:10 -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 1socP9-00087O-6q for qemu-devel@nongnu.org; Thu, 12 Sep 2024 01:30:07 -0400 Received: from mail-pf1-x42d.google.com ([2607:f8b0:4864:20::42d]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1socP7-0002xx-I3 for qemu-devel@nongnu.org; Thu, 12 Sep 2024 01:30:06 -0400 Received: by mail-pf1-x42d.google.com with SMTP id d2e1a72fcca58-7191df6b5f5so395603b3a.0 for ; Wed, 11 Sep 2024 22:30:05 -0700 (PDT) Received: from toolbox.alistair23.me (2403-580b-97e8-0-82ce-f179-8a79-69f4.ip6.aussiebb.net. [2403:580b:97e8:0:82ce:f179:8a79:69f4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-71908fc8fdesm3833034b3a.1.2024.09.11.22.30.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Sep 2024 22:30:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1726119003; x=1726723803; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=98jPE8Nm5XmnYTmie79vaM5ax8offv0h+SJp0+g/oio=; b=Afxv0VCtUYpmGXE+E3xiFi4twTPhNAMzS/Dd4zPkG518f6FGPYPoMz75hS2RwbiUXU AbinH5gBzwMyHs7bZ9NNyN6oC7Yhcby1JJ18/BTDVkf/iBOE6YhpJXGk3Y7Bvk6uS1s6 eWJx3C6tN6vX2B5RD+1pJITYt4uMyiXei9vJS9tWZFU+Ff0dljdA7GAea+Tx+hBZuMvo Caf+tF4aPrI6kKw+gMY7WREpfdNsVI5sB3lNQmE+Td3DyI5hJrV2Zk1ET4ZsbYjvkHxy MiiqAWtWtzJZRzyX/6KTlsiX9h7fMzdkHsHOzMAtYdRV2HlWipxVVylzLOI0f3vOloch V5mg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726119003; x=1726723803; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=98jPE8Nm5XmnYTmie79vaM5ax8offv0h+SJp0+g/oio=; b=SIiqhGzesIHAYDLQ6KJDiv1EUpgNGxOkMWWkjXkmYPQ1MN6WYROIwPaNE5nIwF/+7P np70AFgmy45YN8XBKMLfkRP0ayYeyByIWsnplcjftSc46JXjL6dWkcbB6+faZXbhE3Rf QXIwzOlTKGpgAgtHjEHYn0JUHswVgrINjpixl+h3m4Bhd2Z7d2ezPrRu86qfkXDCF5WY 0EJ45l+/tUV3eg6w3irrj9My1MlfLOYlMJaP6xD3PHUgdTaR1pEt9nbwRBjyEw3e1toA QJor2ieJ1+r5EJCOJKisxfgSlDs28SBfmQvyeKoc61DHV0irlmM0Tt/I6oQcAcGZg2x2 mI5A== X-Gm-Message-State: AOJu0Yw0l7+eRclvHqKXrobKt4wFYsXJrTPjQCtR6GXOiOtIIW/Uo2ct swfjxKQA0viEpGoWGUTNIf6htD1Qd7MsmvrpSwM/HTGrRd6vEDM0ItWRKQ== X-Google-Smtp-Source: AGHT+IHFJpVoqRTRqJDN/lRzeXEUecBDgoyLc/B9teFup1hMsYS91/uIyJP48qIzncqFu24UBz+plg== X-Received: by 2002:a05:6a00:2d17:b0:714:2d05:60df with SMTP id d2e1a72fcca58-71926091d24mr2537578b3a.15.1726119003315; Wed, 11 Sep 2024 22:30:03 -0700 (PDT) From: Alistair Francis X-Google-Original-From: Alistair Francis To: qemu-devel@nongnu.org Cc: alistair23@gmail.com, Jason Chien , Frank Chang , Alistair Francis Subject: [PULL 01/47] target/riscv: Add a property to set vl to ceil(AVL/2) Date: Thu, 12 Sep 2024 15:29:06 +1000 Message-ID: <20240912052953.2552501-2-alistair.francis@wdc.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240912052953.2552501-1-alistair.francis@wdc.com> References: <20240912052953.2552501-1-alistair.francis@wdc.com> 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=2607:f8b0:4864:20::42d; envelope-from=alistair23@gmail.com; helo=mail-pf1-x42d.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 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, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1726119667416116600 Content-Type: text/plain; charset="utf-8" From: Jason Chien RVV spec allows implementations to set vl with values within [ceil(AVL/2),VLMAX] when VLMAX < AVL < 2*VLMAX. This commit adds a property "rvv_vl_half_avl" to enable setting vl =3D ceil(AVL/2). This behavior helps identify compiler issues and bugs. Signed-off-by: Jason Chien Reviewed-by: Frank Chang Message-ID: <20240722175004.23666-1-jason.chien@sifive.com> Signed-off-by: Alistair Francis --- target/riscv/cpu_cfg.h | 1 + target/riscv/cpu.c | 1 + target/riscv/vector_helper.c | 2 ++ 3 files changed, 4 insertions(+) diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h index 8b272fb826..96fe26d4ea 100644 --- a/target/riscv/cpu_cfg.h +++ b/target/riscv/cpu_cfg.h @@ -127,6 +127,7 @@ struct RISCVCPUConfig { bool ext_smepmp; bool rvv_ta_all_1s; bool rvv_ma_all_1s; + bool rvv_vl_half_avl; =20 uint32_t mvendorid; uint64_t marchid; diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index a90808a3ba..8f21171ffa 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -2687,6 +2687,7 @@ static Property riscv_cpu_properties[] =3D { =20 DEFINE_PROP_BOOL("rvv_ta_all_1s", RISCVCPU, cfg.rvv_ta_all_1s, false), DEFINE_PROP_BOOL("rvv_ma_all_1s", RISCVCPU, cfg.rvv_ma_all_1s, false), + DEFINE_PROP_BOOL("rvv_vl_half_avl", RISCVCPU, cfg.rvv_vl_half_avl, fal= se), =20 /* * write_misa() is marked as experimental for now so mark diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c index 10a52ceb5b..072bd444b1 100644 --- a/target/riscv/vector_helper.c +++ b/target/riscv/vector_helper.c @@ -75,6 +75,8 @@ target_ulong HELPER(vsetvl)(CPURISCVState *env, target_ul= ong s1, vlmax =3D vext_get_vlmax(cpu->cfg.vlenb, vsew, lmul); if (s1 <=3D vlmax) { vl =3D s1; + } else if (s1 < 2 * vlmax && cpu->cfg.rvv_vl_half_avl) { + vl =3D (s1 + 1) >> 1; } else { vl =3D vlmax; } --=20 2.46.0