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[2403:580b:97e8:0:82ce:f179:8a79:69f4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-71afc8342easm1665310b3a.11.2024.09.24.15.18.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Sep 2024 15:18:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1727216284; x=1727821084; 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=tNALoGxYT8shTu5z76fc9Bj/Xb/aPmADmGUdV2UZRFg=; b=m6sH3iQZXoWkyroPzmoRqkysTGZRuQbSFuYkiuSQ4yla0D6/JlGuSAzSeZ2WIwoHyC QirYChhRpLua+eWvTyTfvDBK6zB49HtfT71e9Qr/EPtiE3BcpRbDtNtT7K2hYEFQkPJ4 N6QT35PoOe9HVR5q6B5PTy5b930+lJyHO9zRwxzc2jlrwO8JYCWjy+oCD1QLDnu7eq+O KjNYtzz05qqlFvZwZgdSuuQChAIzhcwdhhkrpm2uSOK35E6zndq/gjgkx1BrT61W6ur6 QLKJO4FksZR4N1CrDjAZN7NQJyXoMu+wDgCgItnptQnfti23oou8gwv44gyBnzBUJizj ZbWw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727216284; x=1727821084; 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=tNALoGxYT8shTu5z76fc9Bj/Xb/aPmADmGUdV2UZRFg=; b=hN/uE0XjTtqoL7RWEjvHbQlzlheBtlIudyZ2zP5u8GO4lKVvYmJef2J+tZHoIVHWq6 pRNdF6h+5Py4kM8aiJN8q++I41VESz82dxJNsKRHWlOZc1opjLtxA4Sj2Aa1O08/sZZx uOlZNNbUC7eZ5tuE9oATCZuXBxr5ixOvO7S8nVgvUobmTDxVW7cIw/n+FB9kn3E3UZqs xHjL8ukzIYfCWqmFEmyYgUwZG78zfwuaTtJVHKqRWg6EKxbTUBWQLUKJ58xFf+sM6Flf S+QRGw2vDFKfz7o9LKxVfNSrxUOzvqpDOaX4KaR0vdoJpcx7OR30UZQg2BatVevyMxEw Vwvw== X-Gm-Message-State: AOJu0Ywq3ZyKxAnfLic57WnI2oJYQQU6/SWYi6ph6FszfomKyP89JfSm f0HvFX0+YMqfNIC400fSxj4NP0jBErOpXKuFCowuMyT9nzRqOoi35RYVew== X-Google-Smtp-Source: AGHT+IES2g/ikU9Qe+9lJ0wSLRPqKPvkNFUTX8b/oJSwzP24hG8X9SZDCE+zUdofc6L+LXdu4OrbLQ== X-Received: by 2002:a05:6a21:164e:b0:1cf:5aba:eac4 with SMTP id adf61e73a8af0-1d4e0ba3dc5mr847624637.41.1727216284292; Tue, 24 Sep 2024 15:18:04 -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 v2 01/47] target/riscv: Add a property to set vl to ceil(AVL/2) Date: Wed, 25 Sep 2024 08:17:02 +1000 Message-ID: <20240924221751.2688389-2-alistair.francis@wdc.com> X-Mailer: git-send-email 2.46.1 In-Reply-To: <20240924221751.2688389-1-alistair.francis@wdc.com> References: <20240924221751.2688389-1-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::432; envelope-from=alistair23@gmail.com; helo=mail-pf1-x432.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: 1727216489278116600 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 4bda754b01..cc5552500a 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -2661,6 +2661,7 @@ 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 2.46.1