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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/103008] poor inlined builtin_fmod on x86_64
Date: Fri, 11 Feb 2022 15:47:31 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103008

--- Comment #13 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
(In reply to Richard Biener from comment #12)
> Just as data-point on znver2 Uros testcase shows
>=20
> rguenther@ryzen:/tmp> gcc-11 t.c -Ofast -lm -march=3Dznver2
> rguenther@ryzen:/tmp> numactl --physcpubind=3D3 /usr/bin/time ./a.out=20
> 19.18user 0.00system 0:19.18elapsed 99%CPU (0avgtext+0avgdata
> 1528maxresident)k
> 0inputs+0outputs (0major+76minor)pagefaults 0swaps
> rguenther@ryzen:/tmp> gcc-11 t.c -Ofast -lm -march=3Dznver2 -fno-builtin-=
fmod

You should use -fno-builtin-fmodf in the above compile flags.=