[Bug fortran/30910] [Regression 4.2, 4.3] Gfortran: ES format not quite right...

[burnus at gcc dot gnu dot org]

------- Comment #6 from burnus at gcc dot gnu dot org  2007-02-22 13:50 -------
I think I found why the output is wrong. The following condition has been
introduced 2006-08-27 with the patch
http://gcc.gnu.org/viewcvs?view=rev&revision=116502

Before the "if" the value is 0.1, afterwards it is 0.0.

  /* Special case when format specifies no digits after the decimal point.  */
  if (d == 0)
    {
      if (value < 0.5)
        value = 0.0;
      else if (value < 1.0)
        value = value + 0.5;
    }

The changelog of that patch is:
        PR libgfortran/28354
        * io/write.c: Check for special case of zero precision in format
        and pre-round the real value.

which fixed the bug "0.99999 printed as 0. instead of 1. by format(f3.0)"


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30910