[Bug c/115374] fmod() in x86_64 -O3 not using return value from the glibc's implementation if x87 FPU fprem returns NaN

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115374

--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The bug is mixing MMX with floating point and expecting it to work, it will
never work properly, you need manual emms in between, or better yet, avoid MMX
altogether, it really isn't worth it.  Just use SSE and higher.