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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/96793] __builtin_floor produces wrong result when
 rounding direction is FE_DOWNWARD
Date: Fri, 28 Aug 2020 09:54:45 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96793

--- Comment #12 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
(In reply to Richard Biener from comment #10)
> (In reply to Uro=C5=A1 Bizjak from comment #7)
> > Created attachment 49144 [details]
> > Proposed patch
> >=20
> > Patch in testing.
>=20
> OTOH we _do_ try to compensate for HONOR_SIGNED_ZEROS so I wonder whether
> we really need to punt for -frounding-math?  I also doubt glibc gets it
> correct, does it?

The testcase from Comment #11 works OK when it calls floorf from glibc-2.31,
but it was ran on SSE4.1 capable target, so roundss was used.=