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[97.113.2.170]) by smtp.gmail.com with ESMTPSA id y24-v6sm4216728pfn.23.2018.05.10.17.43.53 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 10 May 2018 17:43:54 -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; bh=lRf4yJ1cSXJuJwZa6kKK3WAqrniWqnrrAqqQnzy7Auw=; b=Fprt7CFHjKM9bhr9BzuWlkVebDj5t/FXN9n3DnZJOSHYmXy7K5ORsYi7WbJzNql9Qf hnsEademRDA0e3hZ6sqTIqwtaZZtc1qxwiL2buDGGj38D28mpEte+yxgODK7yzqTIKMh 95PqMtcm2RjUgQJQf4U+ajHU134HSkd8Cnbu0= 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=lRf4yJ1cSXJuJwZa6kKK3WAqrniWqnrrAqqQnzy7Auw=; b=fKs7tzouIaGGKvctQ4+c2Ur63KFSNrgHqG2xz62wIkPYSsHhmhkPRnA7P28wwmA684 IZ/Rd3fhiENwFFAqZELVBMo+OhhGD9h1k+aiGGPDABiQnkEKWwh5Pe5ihfqx3lNuGQPK HyheWpXXSm2IppQ8ZSXV96QrPvUbQZVvAJOTKi3Kfmy/vobxDKR/5ksxFnqQFtv/NvPJ heVjXUxAO2nz6SLc9XySz+jQqTAEecDqKNgb+LnPK22UGgR4Tmip2nrUpMwNDuLQsbs+ /U17tOUlaXHU+D723K1CFn2+y0lEDHkplwePDfu58dEAtfvM6RVzTMxXoe7XoO11ZnDh UxMA== X-Gm-Message-State: ALKqPwfnO/1S9S71MNworwMvk6e6Oi8Phot90biOV+HeOWu1TKldvBVI FvoreMZtI/HUqGLNmkg4pxDitfh2pRs= X-Google-Smtp-Source: AB8JxZpJafs+Ux4UzqMIadDQ8LJ0/eIHdXw8EsHuQCXEgPbvJjnQGGWjv7aA48gDNm4eJNuBKffhdg== X-Received: by 2002:a17:902:7896:: with SMTP id q22-v6mr3382409pll.243.1525999435178; Thu, 10 May 2018 17:43:55 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Thu, 10 May 2018 17:43:31 -0700 Message-Id: <20180511004345.26708-6-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180511004345.26708-1-richard.henderson@linaro.org> References: <20180511004345.26708-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c01::244 Subject: [Qemu-devel] [PATCH 05/19] 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, alex.bennee@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 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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 b59356f6a5..82d7a030e7 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 df377b6314..6dfc992a7f 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -330,16 +330,8 @@ 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