[Bug c/61399] LDBL_MAX is incorrect with IBM long double format / overflow issues near large values

[vincent-gcc at vinc17 dot net via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61399

--- Comment #11 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
In addition to the maximum exponent issue, for LDBL_MAX following the defect
report, instead of

  0x1.fffffffffffff7ffffffffffff8p+1023

I would expect

  0x1.fffffffffffff7ffffffffffffcp+1023 = DBL_MAX + DBL_MAX * DBL_EPSILON / 4

as it is larger (it has one more trailing 1) and representable.