[Bug tree-optimization/108068] [10/11/12/13 Regression] decimal floating point signed zero is not honored

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108068

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 54147
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54147&action=edit
gcc13-pr108068.patch

So like this instead?  Untested so far.