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From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PULL 15/16] tests/qtest/npcm7xx_rng-test: count runs properly
Date: Tue, 10 Nov 2020 11:19:16 +0000
Message-Id: <20201110111917.29539-16-peter.maydell@linaro.org>
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From: Havard Skinnemoen <hskinnemoen@google.com>
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 <hskinnemoen@google.com>
Message-id: 20201103011457.2959989-2-hskinnemoen@google.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
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 e7cde85fbbc..c614968ffcd 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
2.20.1