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[114.34.229.221]) by smtp.gmail.com with ESMTPSA id f18sm6567309pgv.84.2020.08.06.03.47.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Aug 2020 03:48:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=T2zFAscQb8E+SK8j3wK1kVNT/OC9AVAafjFqeCT4gx8=; b=hJHoDV5BJmvrDR+qfDIwjA7IC8JZCu41XvnnCGnUxh1W8gMX+VfgUnPj6d6/OoZ0Wt RobM8XqFU0s6kBET/XvxauGgrVLIlfQmn0lgJSSA7tS9ZA0UisHshi64AW0xbi4pD1TM wLzFpdDkV9e4BQxdhvX83pT3WiKmlcVW8NAyQ5XSObBozen7uQpOVTlCCXJiNv5ZQ4a4 vNLP2gDgWYyw6RaMvpWulZspEgQQI7CnQ+ze3xT5jVXjeFStX7NiEcy4/5Xbd3DCEjBo Dh8Y1EGDWrF1UhOjpT5q0I8hrBDibUiuqW0kNKP7Msw8d/QwFNf1OaOscewcuXiR4eLi WtWQ== 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; bh=T2zFAscQb8E+SK8j3wK1kVNT/OC9AVAafjFqeCT4gx8=; b=n4csX/RLK6gMZp80wg8UTDCsZzG9vCFkElOZopjJwbdCCcgeIutPyp5jCP+i9ko5tQ AokIL3wn5eNuke7iqQmxhXq6uxQ/j1N7ZDualmEdnucytx/R2LrW0/UmJW1m3mZ8pJXN He1sIkZaIoYNSq9L6updFbLMdv/nRAsWV6mEg1ryrmby7aOA+iD+WtGAKKoMyoh8LzVq wTkcMZ+ToeiW4Z6mdcbtLCIXqnHSqZsiWm7rcYoZIVJzbjRbONgx6EgZDgMqok3VWyRa 6o3TAwSAy536E3nlcj7XRqhGGiTNpY5mdoqvXwR2YcPZ3SRdPkJYVE6f7+4OtrubZFUz os6A== X-Gm-Message-State: AOAM533DEef8xp692FL9Hfzl4MYZPwTbMLVkfu01DyxqE0oF2ELAGny7 87R+5tq0ym5/zptG0uuq8eyLdRgvaNs= X-Google-Smtp-Source: ABdhPJxI5ZKlWRLp1t93Q3Wn0chiLKpaBE9U7jKrPC9lSPk+jRVC+BiGZX8GstBdD8ha1BIbreplXQ== X-Received: by 2002:a17:902:aa93:: with SMTP id d19mr6958337plr.272.1596710881750; Thu, 06 Aug 2020 03:48:01 -0700 (PDT) From: frank.chang@sifive.com To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Subject: [RFC v3 16/71] target/riscv: add fp16 nan-box check generator function Date: Thu, 6 Aug 2020 18:46:13 +0800 Message-Id: <20200806104709.13235-17-frank.chang@sifive.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200806104709.13235-1-frank.chang@sifive.com> References: <20200806104709.13235-1-frank.chang@sifive.com> 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::1043; envelope-from=frank.chang@sifive.com; helo=mail-pj1-x1043.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. 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, URIBL_BLOCKED=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: Frank Chang , Alistair Francis , Palmer Dabbelt , Sagar Karandikar , Bastian Koppelmann Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Frank Chang If a 16-bit input is not properly nanboxed, then the input is replaced with the default qnan. Signed-off-by: Frank Chang --- target/riscv/translate.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/target/riscv/translate.c b/target/riscv/translate.c index 24026f901d1..95921296a56 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -110,6 +110,16 @@ static void gen_nanbox_s(TCGv_i64 out, TCGv_i64 in) * * Here, the result is always nan-boxed, even the canonical nan. */ +static void gen_check_nanbox_h(TCGv_i64 out, TCGv_i64 in) +{ + TCGv_i64 t_max =3D tcg_const_i64(0xffffffffffff0000ull); + TCGv_i64 t_nan =3D tcg_const_i64(0xffffffffffff7e00ull); + + tcg_gen_movcond_i64(TCG_COND_GEU, out, in, t_max, in, t_nan); + tcg_temp_free_i64(t_max); + tcg_temp_free_i64(t_nan); +} + static void gen_check_nanbox_s(TCGv_i64 out, TCGv_i64 in) { TCGv_i64 t_max =3D tcg_const_i64(0xffffffff00000000ull); --=20 2.17.1