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[97.113.2.170]) by smtp.gmail.com with ESMTPSA id g11-v6sm941419pgq.62.2018.05.15.15.25.51 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 15 May 2018 15:25:51 -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=NDocmVZUOONUOfeN6IKcLHJXGoyvNK2Y5NvMxwiShq7jEiJctX51M35yf55RsnP4br 9kRYsEIbh9uLQ7B2YpNRrSkfs0De6/5kxaviSgvHyD7W3uuZe/IZ8sS49w2UIKQAtxkV q+nwOnpOZJQ2BYWWarLMsmDQn8YGaHbjHycTc= 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=fn3CEraXWK9uElJMzq4YTPl+g78jR8nlJ1oKHb/c1vRN//bIIQj8q/PhHq/CgvTIH+ yq4dulea4Dpcg0s+2KgBUmhf42y9bn/O46H0u0gGU5RWK35HayP1s1RUlC/BY2pVEHkh ft+ub2/n0VG4PkyU48PxIxcePlLAxvweRST8LmPsfvJs1JBw93fw0wIKerN57uMLzkYQ 9AI8QwSu3xIfMVRXABZhDXQEsZUsoG/ADAg0P+1wQ0bRyzXPHfkN2JdXovalReNjfk+o cX3BJKVGly/sPmGPrglzEY0QtZGPaMJ0R/abAP+VqgkkJbwTlbRwJel2gsrNZIT09EJ0 Dnjg== X-Gm-Message-State: ALKqPwceYDXI4CEAZKa+bvjtQLAg8TDJ9kY81lmjKpCkivRLfuHPqnug V52ET9EoETqTDXBn1JLOzyKxUG1WLaQ= X-Google-Smtp-Source: AB8JxZq44sHdfyakUsayEXtX7uscuY/MsLlLdMEv83MQ13ccPB+JptaVjFLtriAct83M9jt+8lyvwQ== X-Received: by 2002:a17:902:8f97:: with SMTP id z23-v6mr16542537plo.329.1526423152336; Tue, 15 May 2018 15:25:52 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Tue, 15 May 2018 15:25:18 -0700 Message-Id: <20180515222540.9988-7-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180515222540.9988-1-richard.henderson@linaro.org> References: <20180515222540.9988-1-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::22d Subject: [Qemu-devel] [PATCH v6 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, 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 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