The Math.hypot method claims its error bound is one ulp. The paper
"Accuracy of Mathematical Functions in Single, Double, Double Extended, and Quadruple Precision" Brian Gladman, Vincenzo Innocente and Paul Zimmermann September 21, 2023 https://members.loria.fr/PZimmermann/papers/accuracy.pdf lists a known worst-case error of 1.21 ulps for hypot for the "OpenLibm" math library, which is a derivative of FDLIBM. The specification of Math.hypot should be updated to acknowledge the wider error bound. I changed the allowable error bound to 1.5 ulps is give a bit of cushion. ------------- Commit messages: - JDK-8316688: Widen allowable error bound of Math.hypot Changes: https://git.openjdk.org/jdk/pull/15868/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15868&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8316688 Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/15868.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15868/head:pull/15868 PR: https://git.openjdk.org/jdk/pull/15868
