[Bug c/96793] __builtin_floor produces wrong result when rounding direction is FE_DOWNWARD

[chfast at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96793

--- Comment #1 from Paweł Bylica <chfast at gmail dot com> ---
Created attachment 49126
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49126&action=edit
Test source code