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[97.113.2.170]) by smtp.gmail.com with ESMTPSA id k84-v6sm10756406pfh.93.2018.05.11.17.43.22 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 11 May 2018 17:43:23 -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=rvlR+Ql7MEYt3TgPxBAN9LiqLt4J1geWtV6fjJYwD6Q=; b=KNOHSlTopgRlGGJHx6hnSFJqeOScZ3ACjo8nZj7wys5Rf+sEtHTBgvVI5ztv6eVqxR 1BJYCksnWYSwnw+VMVTLyMpsCtGHSRblPw1c/WKPCw0OhM45gxr/3cKvGR8eff6N18YO X0U+Zfc33vK9yRwkgEU7crljzLMWwkmDmHxxc= 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=rvlR+Ql7MEYt3TgPxBAN9LiqLt4J1geWtV6fjJYwD6Q=; b=qPSE8C4XFBwbfp/zD1dbTDqzmGIomrHTxHhZTef6qSRdf05759U40ETM/9mQtrueIQ /M31V87GnH2Fb2AIxnxQRdhl4zIcJM+W2496+xAYqILblL8qS3If1e5KvXhsOffOL7G3 YKmo/UdCMhFYFfg4TcwOJMUggsKSPLHakgZv2PPCG/fi/fDZ274zsZzCYQd1jEUGBt07 P02DQCzxYbo5VqDRRlMArKOv9irwL47n3AyaO1w9sMQe6YBlUQcV+p0NdX0fl6TukRLH 6xWoR5J3r+mu+XSNaN8XPMJF5r74RXPy2HWFZKtT8MjP/N2gYVcb/woIX9EGS09sQbI0 GGHQ== X-Gm-Message-State: ALKqPwc6yeD04yUK0bRHC1xfcCqN49ixpTQ7ZCPw8Y1GbROLtFOSfu2Z DWl1vj09wHdh/xySrsgODXY3jD94MxA= X-Google-Smtp-Source: AB8JxZpQ66bJTBzcQdNoJYFF6nocmXTvqI7C6dj3VxFZ1kU/4u4fV8GEv5DaPnQGnio8+jYZwb7NnA== X-Received: by 2002:a62:e710:: with SMTP id s16-v6mr957455pfh.227.1526085804614; Fri, 11 May 2018 17:43:24 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Fri, 11 May 2018 17:42:51 -0700 Message-Id: <20180512004311.9299-8-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180512004311.9299-1-richard.henderson@linaro.org> References: <20180512004311.9299-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c00::241 Subject: [Qemu-devel] [PATCH v2 07/27] 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 Reviewed-by: Peter Maydell --- 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 a56d3d975b..cb68f2eb20 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