https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109154

--- Comment #21 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 54770
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54770&action=edit
gcc13-pr109154.patch

So what about this then?
It matches the x86 FTZ behavior, because FTZ is a masked reaction to underflow
exception, so for operations like comparisons nothing is flushed to zero nor
comparing as it was flushed to zero.
But no idea what e.g. Alpha will do, if it has in hardware support for
comparisons including denormals...

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