[Bug cobol/119241] cobol Front end uses host floating point (128b) support

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119241

--- Comment #23 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I've misparsed the condition guarding it, thought %f is done when it the
exponent is outside of the narrow range, not inside.
Anyway, if it is going to stick with the E notation, we should change e to E
and make sure that the number following +- has at least 2 digits.
And test whether printing 0. or -0. works the same before/after, plus the
large/too small exponent cases, plus the 0, small negative and small positive
ones.