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Fri, 27 Mar 2020 02:49:52 -0700 (PDT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Subject: [PATCH v1 5/7] fpu/softfloat: avoid undefined behaviour when normalising empty sigs Date: Fri, 27 Mar 2020 09:49:43 +0000 Message-Id: <20200327094945.23768-6-alex.bennee@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200327094945.23768-1-alex.bennee@linaro.org> References: <20200327094945.23768-1-alex.bennee@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: 2a00:1450:4864:20::342 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Aurelien Jarno Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) The undefined behaviour checker pointed out that a shift of 64 would lead to undefined behaviour. Signed-off-by: Alex Benn=C3=A9e --- fpu/softfloat.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 301ce3b537b..444d35920dd 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -3834,9 +3834,14 @@ void normalizeFloatx80Subnormal(uint64_t aSig, int32= _t *zExpPtr, { int8_t shiftCount; =20 - shiftCount =3D clz64(aSig); - *zSigPtr =3D aSig<