[Bug target/108922] fmod() 13x slowdown in gcc4.9 dropping "fprem" and calling fmod()

[amonakov at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108922

--- Comment #7 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
I saw that. That's why I'm pointing out that Glibc (and musl) uses the
instruction without any additional checks: real CPUs produce the expected
result in st(0), despite the documentation making no promise about the content
of st(0)).