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[97.113.2.170]) by smtp.gmail.com with ESMTPSA id y2-v6sm14512457pgp.92.2018.05.14.15.12.28 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 14 May 2018 15:12:29 -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=sMFvxehNW2WjX/2qTbv+EhzKGZ6dKWsMD6UmFGMjN8k=; b=Xw4oWvHSUvr/S9d3lFMZDuiXtbPqogZB9Fn0mY4PYEoNT3ytPLUBUdA7GMw6MNwSne 1pZ68NXADgioiUqmScfeT5fzxiiBlCO4riEE6lJpUiVv2bwG3z3yWc/GytLdOYn1P774 +npjrGV3nbZJ7Q8AdUZF7nwjpoUAY0/QOD0BY= 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=sMFvxehNW2WjX/2qTbv+EhzKGZ6dKWsMD6UmFGMjN8k=; b=RZEBFj80ur4yjCrg4TUAtEeE3UjuXjFKmGNFH4XTRm8ANxIVWSy4Ru6ezRVQ4UtoPt mhsqKIp9LVsxuD6ouVLd8ICwEbINmDnduQklifU/bamIyTnHMmahKPfOMO9y7NOw0THY 12oz2plDrNJscBjsNutxQplrBFduOX8Gk4jWzdYwa8oMMthSf1r5fOq6zXuIYYDfrxvt 82EywN3Ut2vLWM0X0cEpaSnYNosNQT5GxoSR+bUDWfSt3exr4Cl6nN/UIaAahmnPkVGl LLSK0VvZcknAyCARY+MuzThqXXUvqBgq5U8/fwyOcSu1UaqOTkbbEZdTzK24wzlq8M+6 waHw== X-Gm-Message-State: ALKqPwf/fAdVhcpwjNJVH2YMyZPQ+xVpLoAqDnk4SFP1aOaQvK+wDcP2 gWiIUHyqvMe9QEc9AyLmXn/HpN4ncqg= X-Google-Smtp-Source: AB8JxZqmaaZda0xaFS+1t7WCNMJ1scav6aAzYxE3X0HhM0o0iQ/LrQC6SUHet8zMPlVRMZv6RkEaeg== X-Received: by 2002:a17:902:10c:: with SMTP id 12-v6mr11712846plb.252.1526335950252; Mon, 14 May 2018 15:12:30 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Mon, 14 May 2018 15:11:57 -0700 Message-Id: <20180514221219.7091-7-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180514221219.7091-1-richard.henderson@linaro.org> References: <20180514221219.7091-1-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 v5 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 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson Reviewed-by: Alex Benn=C3=A9e --- 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