2012-03-15  Janne Blomqvist  <jb@gcc.gnu.org>

        PR libfortran/52434
        PR libfortran/48878
        PR libfortran/38199
        * io/unit.c (get_internal_unit): Default to ROUND_UNSPECIFIED.
        (init_units): Likewise.
        * io/write_float.def (determine_precision): New function.
        (output_float): Take into account buffer with %f format, no need
        for our own rounding if unspecified or processor specified
        rounding.
        (DTOA): Simplify format string, add parameters.
        (FDTOA): New macros similar to DTOA, but using %f format.
        (OUTPUT_FLOAT_FMT_G): Stack allocate newf, determine correct
        precision and fill buffer.
        (EN_PREC): New macro.
        (determine_en_precision): New function.
        (WRITE_FLOAT): For G format, move buffer filling into
        output_float_FMT_G, use FDTOA for F format.
        (write_float): Increase buffer due to F format.

testsuite ChangeLog:

2012-03-15  Janne Blomqvist  <jb@gcc.gnu.org>

        PR libfortran/52434
        PR libfortran/48878
        PR libfortran/38199
        * gfortran.dg/edit_real_1.f90: Don't assume roundTiesToAway.
        * gfortran.dg/round_1.f03: Likewise.

From-SVN: r185433