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Thu, 22 Jan 2026 08:43:37 -0800 (PST) Received: from draig.lan ([185.126.160.19]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43597ae9f37sm16259183f8f.8.2026.01.22.08.43.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Jan 2026 08:43:36 -0800 (PST) Received: from draig (localhost [IPv6:::1]) by draig.lan (Postfix) with ESMTP id 38C105F7C3; Thu, 22 Jan 2026 16:43:36 +0000 (GMT) From: =?utf-8?Q?Alex_Benn=C3=A9e?= To: Ilya Leoshkevich Cc: Thomas Huth , Richard Henderson , David Hildenbrand , qemu-s390x@nongnu.org, qemu-devel@nongnu.org Subject: Re: [PATCH 3/3] tests/tcg/s390x: Test DIVIDE TO INTEGER In-Reply-To: <20260121222116.713325-4-iii@linux.ibm.com> (Ilya Leoshkevich's message of "Wed, 21 Jan 2026 23:12:33 +0100") References: <20260121222116.713325-1-iii@linux.ibm.com> <20260121222116.713325-4-iii@linux.ibm.com> User-Agent: mu4e 1.12.15; emacs 30.1 Date: Thu, 22 Jan 2026 16:43:36 +0000 Message-ID: <87jyx9mwcn.fsf@draig.linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::436; envelope-from=alex.bennee@linaro.org; helo=mail-wr1-x436.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Ilya Leoshkevich writes: > Add a test to prevent regressions. Data is generated using a > libFuzzer-based fuzzer and hopefully covers all the important corner > cases. > > Signed-off-by: Ilya Leoshkevich > --- > tests/tcg/s390x/Makefile.target | 3 + > tests/tcg/s390x/divide-to-integer.c | 215 ++++++++++++++++++++++++++++ > 2 files changed, 218 insertions(+) > create mode 100644 tests/tcg/s390x/divide-to-integer.c > > diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.t= arget > index da5fe71a407..d5ec01d04fd 100644 > --- a/tests/tcg/s390x/Makefile.target > +++ b/tests/tcg/s390x/Makefile.target > @@ -49,14 +49,17 @@ TESTS+=3Dcvd > TESTS+=3Dcvb > TESTS+=3Dts > TESTS+=3Dex-smc > +TESTS+=3Ddivide-to-integer >=20=20 > cdsg: CFLAGS+=3D-pthread > cdsg: LDFLAGS+=3D-pthread >=20=20 > rxsbg: CFLAGS+=3D-O2 > +divide-to-integer: CFLAGS+=3D-O2 As we generally compile -O0 to make life easier for people debugging behaviour via gdbstub could we have an explanation of why -O2 is needed here? Is it the same reason as rxsbg? --=20 Alex Benn=C3=A9e Virtualisation Tech Lead @ Linaro