https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103008
--- Comment #13 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to Richard Biener from comment #12) > Just as data-point on znver2 Uros testcase shows > > rguenther@ryzen:/tmp> gcc-11 t.c -Ofast -lm -march=znver2 > rguenther@ryzen:/tmp> numactl --physcpubind=3 /usr/bin/time ./a.out > 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=znver2 -fno-builtin-fmod You should use -fno-builtin-fmodf in the above compile flags.
