https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67509
--- Comment #3 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> --- (In reply to Pat Haugen from comment #2) > I see the same thing on both powerpc64/powerpc64le: > > pthaugen@genoa:~$ ~/install/gcc/trunk/bin/gfortran z.f90 && ./a.out > 4 8 16 > 16 16 > 291 > 8 > 8 > 8 > 8 That's weird, because it would mean that the "decimal exponent range" (i.e. the largest possible power of ten) is 291, which is smaller than the range of 307 for a regular double. I know that ppc long double is the non-IEEE "double double" format, but this should give it the same range as double. Can you tell me what this outputs? print *, range(0._4), range(0._8), range(0._16) print *, huge(0._4), huge(0._8), huge(0._16) print *, tiny(0._4), tiny(0._8), tiny(0._16) end
