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Message-Id: <p9u0bjbmz8g6.fsf@thym>
Date: Sat, 01 Aug 2026 08:00:25 +0200
From: Paul Zimmermann <Paul.Zimmermann@...ia.fr>
To: Damian McGuckin <damianm@....com.au>
Cc: musl@...ts.openwall.com
Subject: Re: issue in acosh
Hi,
by the way, before I found this failure, the largest error we found was 2.25 ulps
for acosh, i.e., the same value as Newlib, OpenLibm and FreeBSD, for the exact same
input 0x1.0001ff6afc4bap+0 [1]. However, these other libraries get it right for x < 0.
Paul
[1] https://members.loria.fr/PZimmermann/papers/accuracy.pdf
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