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Re: 1.7.8: Fortran I/O rounding inaccuracy
On 3/7/2011 4:17 AM, Thomas Henlich wrote:
I doubt our compiler is Fortran 2008 compliant, as at maximum it will
be Fortran 2003
An identical phrase appears in Fortran 2003.
Have you tested gfortran 4.3 on other platform ?
Due to unavailability, I was not able to test this particular version
on other platforms.
gfortran 4.4 on Debian
gfortran snapshot 20101129 on mingw32
gfortran snapshot 20100408 (unofficial Cygwin build)
You haven't shown how you tested rounding modes UP or DOWN, which may
not be implemented in gfortran, as those (I believe) require the
IEEE_arithmetic module, which is still under development. Doesn't the
wording you quote apply to the binary value resulting from READ conversion?
In the default (without IEEE_arithmetic settings), it's not clear to me
that f2003 or 2008 standards impose requirements beyond those of
IEEE754, which allow the decimal representation to truncate after 17
As Corinna said, the place to ask about progress in this area of
gfortran is firstname.lastname@example.org.
Corinna is more of an expert on newlib than are we; the differences you
quote between linux implementation on glibc and cygwin which you quote
appear to be within newlib.
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