[Bug libfortran/48602] Invalid F conversion of G descriptor for values close to powers of 10

[thenlich at users dot sourceforge.net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48602

--- Comment #14 from Thomas Henlich <thenlich at users dot sourceforge.net> 2011-04-16 17:28:16 UTC ---
(In reply to comment #13)
> OK, here is what I have settled on for the IF clause after checking the
> factoring.
> 
>   rexp_d = calculate_exp_ ## x (-d);\
>   if ((m > 0.0 && m < 0.1 - 0.1 * r * rexp_d) || (rexp_d * (m + r) >= 1.0) ||\
>       ((m == 0.0) && !(compile_options.allow_std & GFC_STD_F2003)))\
>     { \
>       newf->format = FMT_E;\
>       newf->u.real.w = w;\
>       newf->u.real.d = d;\
>       newf->u.real.e = e;\
>       nb = 0;\
>       goto finish;\
>     }\
> 
> Regression testing now.

Just noticed:

Shouldn't the last term in the if clause be:
compile_options.allow_std & (GFC_STD_F2003 | GFC_STD_F2008)

Fortran 2008 requires the F conversion for a magnitude of 0.0.