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Mon, 02 Nov 2020 17:15:12 -0800 (PST) Date: Mon, 2 Nov 2020 17:14:55 -0800 In-Reply-To: <20201103011457.2959989-1-hskinnemoen@google.com> Message-Id: <20201103011457.2959989-2-hskinnemoen@google.com> Mime-Version: 1.0 References: <20201103011457.2959989-1-hskinnemoen@google.com> X-Mailer: git-send-email 2.29.1.341.ge80a0c044ae-goog Subject: [PATCH 1/3] tests/qtest/npcm7xx_rng-test: count runs properly To: peter.maydell@linaro.org Cc: qemu-arm@nongnu.org, qemu-devel@nongnu.org, Havard Skinnemoen Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::44a; envelope-from=3IK-gXwsKCgUmxpnssjrtjslttlqj.htrvjrz-ij0jqstslsz.twl@flex--hskinnemoen.bounces.google.com; helo=mail-pf1-x44a.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -95 X-Spam_score: -9.6 X-Spam_bar: --------- X-Spam_report: (-9.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, 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, USER_IN_DEF_DKIM_WL=-7.5 autolearn=ham autolearn_force=no X-Spam_action: no action 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Reply-to: Havard Skinnemoen From: Havard Skinnemoen via X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The number of runs is equal to the number of 0-1 and 1-0 transitions, plus one. Currently, it's counting the number of times these transitions do _not_ happen, plus one. Source: https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-22r1a= .pdf section 2.3.4 point (3). Signed-off-by: Havard Skinnemoen --- tests/qtest/npcm7xx_rng-test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/qtest/npcm7xx_rng-test.c b/tests/qtest/npcm7xx_rng-test.c index da6e639bf6..57787c5ffc 100644 --- a/tests/qtest/npcm7xx_rng-test.c +++ b/tests/qtest/npcm7xx_rng-test.c @@ -126,7 +126,7 @@ static double calc_runs_p(const unsigned long *buf, uns= igned int nr_bits) pi =3D (double)nr_ones / nr_bits; =20 for (k =3D 0; k < nr_bits - 1; k++) { - vn_obs +=3D !(test_bit(k, buf) ^ test_bit(k + 1, buf)); + vn_obs +=3D (test_bit(k, buf) ^ test_bit(k + 1, buf)); } vn_obs +=3D 1; =20 --=20 2.29.1.341.ge80a0c044ae-goog