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From: "joseph at codesourcery dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug math/28472] pow(10, i) accuracy
Date: Mon, 24 Jan 2022 21:56:01 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28472

--- Comment #7 from joseph at codesourcery dot com <joseph at codesourcery =
dot com> ---
Being correctly rounded is out of scope for both pow and exp10 and=20
failures to be correctly rounded should not be considered problems, only=20
errors of more than a few ulps are bugs in glibc.

We're a lot more likely to get cr_exp10 than cr_pow, but that would depend=
=20
on both CORE-MATH implementing it and someone doing the work to integrate=20
it into glibc (note that the present CORE-MATH implementations aren't=20
suitably portable for glibc at present - they depend on 64-bit systems,=20
for example, via hardcoded assumptions on the size of long and=20
requirements in places for 128-bit integer types - are very lacking in=20
comments, and may not meet the requirements for correct exceptions from=20
cr_*).

--=20
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