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[97.113.2.170]) by smtp.gmail.com with ESMTPSA id c3-v6sm4966632pfn.62.2018.05.16.08.52.53 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 16 May 2018 08:52:54 -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=LQoF9e5L3ALMayOgvkerESyi2UVKdvRwamrm6aU1hPU=; b=QM4Qg8bXWNTgm4uQ5fsbDrbrATrAiqUVLWRxsAwQG+vHxB/ivBccUENHeg2NNrSH5r JNhcN7EXK0SmDLLpyCq8kgcfLi5ukH9vbVb2tosHO/A5GR5SfVhE78YO/S0DG3/KFvV2 ZbaJVrVbHiRBriWIe/QIc0mKIfz+oD8b4mMv4= 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=LQoF9e5L3ALMayOgvkerESyi2UVKdvRwamrm6aU1hPU=; b=EB50sOsXqCpHzfAlsGMv3sgoiO+SL6a3PDWpcIANblp63qWhTaqIJElqJHGMuQpugI +qGrvSr4tLrS+cjBSyV6j3ZBquv7BxZWUnDgu2HBoWXYRkt0qwLX6RBH/nw4H0hW5v8k vqzFqgpW4k5U/yy/Mx1FGGsiLtyzvGCZwb/un1F5ZVnVbG/d1UfsHK27rCpgjkv1eWJf X9aQUrO6EOZWVZFC0khywZa6FW1kJivIhLmo8rGz4MiYF9eeMNh4HdLOtAmcrHkpH5QF bAzopUd/puFYtVv+LCJvDjD1omCKBVOiFizwtWhc7oqKcX59Kk6ODN6yimtPM1kNEVMb 5m5A== X-Gm-Message-State: ALKqPwdY+cFrGmTse7FnLrV7ZNMPFVKJVrsnanMacVKEGyTPSRHrHjYL k3F4HxZzV2W1D2RAlRJZxMBLAQFsIh8= X-Google-Smtp-Source: AB8JxZpVQRQxW+0LDstFdGg9uTK2YzRknDI4UNXiwfo0h8fawIQXcKaC9KcKnp8eLiqWvAS10+Nm9A== X-Received: by 2002:a17:902:aa94:: with SMTP id d20-v6mr1475103plr.323.1526485975043; Wed, 16 May 2018 08:52:55 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Wed, 16 May 2018 08:52:21 -0700 Message-Id: <20180516155243.16937-7-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180516155243.16937-1-richard.henderson@linaro.org> References: <20180516155243.16937-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c01::22f Subject: [Qemu-devel] [PULL 06/28] fpu/softfloat: Introduce parts_is_snan_frac X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Tested-by: Alex Benn=C3=A9e Reviewed-by: Alex Benn=C3=A9e Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- fpu/softfloat-specialize.h | 15 +++++++++++++++ fpu/softfloat.c | 12 ++---------- 2 files changed, 17 insertions(+), 10 deletions(-) diff --git a/fpu/softfloat-specialize.h b/fpu/softfloat-specialize.h index 4fc9ea4ac0..515cb12cfa 100644 --- a/fpu/softfloat-specialize.h +++ b/fpu/softfloat-specialize.h @@ -86,6 +86,21 @@ this code that are retained. #define NO_SIGNALING_NANS 1 #endif =20 +/*------------------------------------------------------------------------= ---- +| For the deconstructed floating-point with fraction FRAC, return true +| if the fraction represents a signalling NaN; otherwise false. +*-------------------------------------------------------------------------= ---*/ + +static bool parts_is_snan_frac(uint64_t frac, float_status *status) +{ +#ifdef NO_SIGNALING_NANS + return false; +#else + flag msb =3D extract64(frac, DECOMPOSED_BINARY_POINT - 1, 1); + return msb =3D=3D status->snan_bit_is_one; +#endif +} + /*------------------------------------------------------------------------= ---- | The pattern for a default generated half-precision NaN. *-------------------------------------------------------------------------= ---*/ diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 607c4a78d5..19f40d6932 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -331,16 +331,8 @@ static FloatParts canonicalize(FloatParts part, const = FloatFmt *parm, part.cls =3D float_class_inf; } else { part.frac <<=3D parm->frac_shift; -#ifdef NO_SIGNALING_NANS - part.cls =3D float_class_qnan; -#else - int64_t msb =3D part.frac << 2; - if ((msb < 0) =3D=3D status->snan_bit_is_one) { - part.cls =3D float_class_snan; - } else { - part.cls =3D float_class_qnan; - } -#endif + part.cls =3D (parts_is_snan_frac(part.frac, status) + ? float_class_snan : float_class_qnan); } } else if (part.exp =3D=3D 0) { if (likely(part.frac =3D=3D 0)) { --=20 2.17.0