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[97.113.2.170]) by smtp.gmail.com with ESMTPSA id g11-v6sm941419pgq.62.2018.05.15.15.25.49 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 15 May 2018 15:25:50 -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=/xl8f2zQlEINP9lneuf7ucQwkBVVFUmq+tNHsXqCle4=; b=KAks+qfNdDptnN3Gu5xQRRh+cEDmQWZ3Tf7fObac4IOVwGW4WgIG35YwO2ao5yXWPm rdOrtu+OrKiinPfCU/zp48QLUUA7wEFG82bZg+fLQRKh7IhdGuuarR49jrfQ5dsu34wP DRuT10BaRIzFSXIkUp5GByi67VI/x/esQGI5I= 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=/xl8f2zQlEINP9lneuf7ucQwkBVVFUmq+tNHsXqCle4=; b=KqgDRmGZZokACbu2p8ZUe0KZam4W+mlpVxY+odOcY9D7CMnlbl2h8kWIY2WMPtPrbx XYM7U2I5M++QA2j1thB/htgWyRK6czV70Ry0U+tHVLHrOCXDH/DrIBJ0rTW5nw6MjLag dCGEiR4+Uq6iGJn4vCyDfIBRNcEDlQMdet7mjDfxShF8ELM/c898XNIFwqsNIHHPDp9P /KWZqzDej5ntOYP1NwDvrPTlJbATHWeRoLE4/pScuqk9twz2gr9csP9SlLgq3Bf5cXBL KePlMSTQGEJeMyOoKrmVGsmMiDYoGhNoEeroemuJqNwnii5edrsbjbDDeY/1mCO7uUgm 1yew== X-Gm-Message-State: ALKqPwfeRqrmI+G1epo6LWsYd2S18NK48y4AxKqLqoInSv4u5rKesX9Z vGrw/H9YSZ/rl4wLHbMywqQkE1er79A= X-Google-Smtp-Source: AB8JxZqbxqFjKeYGGDHryWVZOGrFLuJXe93w34aPAodDwol9jIm/K2VW4JHQjyEPy0j3seJkcdX2wA== X-Received: by 2002:a63:bd49:: with SMTP id d9-v6mr13963324pgp.14.1526423151110; Tue, 15 May 2018 15:25:51 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Tue, 15 May 2018 15:25:17 -0700 Message-Id: <20180515222540.9988-6-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:c00::241 Subject: [Qemu-devel] [PATCH v6 05/28] fpu/softfloat: Canonicalize NaN fraction 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 Shift the NaN fraction to a canonical position, much like we do for the fraction of normal numbers. This will facilitate manipulation of NaNs within the shared code paths. Tested-by: Alex Benn=C3=A9e Reviewed-by: Alex Benn=C3=A9e Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- fpu/softfloat.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 0d17027379..607c4a78d5 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -330,10 +330,11 @@ static FloatParts canonicalize(FloatParts part, const= FloatFmt *parm, if (part.frac =3D=3D 0) { 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 << (parm->frac_shift + 2); + int64_t msb =3D part.frac << 2; if ((msb < 0) =3D=3D status->snan_bit_is_one) { part.cls =3D float_class_snan; } else { @@ -480,6 +481,7 @@ static FloatParts round_canonical(FloatParts p, float_s= tatus *s, case float_class_qnan: case float_class_snan: exp =3D exp_max; + frac >>=3D parm->frac_shift; break; =20 default: @@ -503,6 +505,7 @@ static float16 float16_round_pack_canonical(FloatParts = p, float_status *s) case float_class_dnan: return float16_default_nan(s); case float_class_msnan: + p.frac >>=3D float16_params.frac_shift; return float16_maybe_silence_nan(float16_pack_raw(p), s); default: p =3D round_canonical(p, s, &float16_params); @@ -521,6 +524,7 @@ static float32 float32_round_pack_canonical(FloatParts = p, float_status *s) case float_class_dnan: return float32_default_nan(s); case float_class_msnan: + p.frac >>=3D float32_params.frac_shift; return float32_maybe_silence_nan(float32_pack_raw(p), s); default: p =3D round_canonical(p, s, &float32_params); @@ -539,6 +543,7 @@ static float64 float64_round_pack_canonical(FloatParts = p, float_status *s) case float_class_dnan: return float64_default_nan(s); case float_class_msnan: + p.frac >>=3D float64_params.frac_shift; return float64_maybe_silence_nan(float64_pack_raw(p), s); default: p =3D round_canonical(p, s, &float64_params); --=20 2.17.0