[Bug libfortran/48615] Invalid UP/DOWN rounding with E and ES descriptors

["jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48615

--- Comment #13 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> 2011-04-29 14:56:08 UTC ---
Author: jvdelisle
Date: Fri Apr 29 14:56:02 2011
New Revision: 173166

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=173166
Log:
2011-04-29  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
        Janne Blomqvist  <jb@gcc.gnu.org>

    PR libgfortran/48488
    PR libgfortran/48602
    PR libgfortran/48615
    PR libgfortran/48684
    PR libgfortran/48787
    * io/write.c (write_d, write_e, write_f, write_en,
    write_es): Add precision compemsation parameter to call.
    (set_fnode_default): Adjust default widths to assure
    round trip on write and read. (write_real): Adjust call to write_float.
    (write_real_g0): Calculate compensation for extra precision and adjust
    call to write_float. 
    * io/write_float.def (output_float_FMT_G_): Use volatile rather than
    asm volatile to avoid optimization issue. Correctly calculate the
    number of blanks (nb) to be appended and simplify calculation logic.
    (write_float): Increase MIN_FIELD_WIDTH by one to accomodate the new
    default widths. Eliminate the code that attempted to reduce the
    the precision used in later sprintf functions.  Add call parameter to
    compensate for extra precision.

Modified:
    trunk/libgfortran/ChangeLog
    trunk/libgfortran/io/write.c
    trunk/libgfortran/io/write_float.def