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From: "dominiq at lps dot ens dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/33469] Default formats for real input are not precise enough
Date: Wed, 03 Oct 2007 19:30:00 -0000 [thread overview]
Message-ID: <20071003193006.24360.qmail@sourceware.org> (raw)
In-Reply-To: <bug-33469-12313@http.gcc.gnu.org/bugzilla/>
------- Comment #10 from dominiq at lps dot ens dot fr 2007-10-03 19:30 -------
gcc/testsuite/gfortran.dg/default_format_1.f90 passes the test if I replace
if (y /= x) res = res + 1
by
z=0.0_k
if (abs(x-y)>nearest(z,1.0_k)) res = res + 1
in the two places of test_r8, i.e. the tests fail for TINY() because the result
differs from the original value by ~+/-5.0E-324: the smallest denormalized
number. I have noticed that this happens for an odd number of iterations of
NEAREST(), but I did not figure out if the culprit was the WRITE() or the
READ(). I have also seen the same problem with xlf and g95.
I suggest that the test includes this change and does not xfail on Darwin.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33469
next prev parent reply other threads:[~2007-10-03 19:30 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-18 9:46 [Bug fortran/33469] New: Add one digit to the default formatted output dominiq at lps dot ens dot fr
2007-09-18 9:47 ` [Bug fortran/33469] " dominiq at lps dot ens dot fr
2007-09-18 17:57 ` burnus at gcc dot gnu dot org
2007-09-19 9:54 ` fxcoudert at gcc dot gnu dot org
2007-09-19 9:55 ` fxcoudert at gcc dot gnu dot org
2007-09-19 9:56 ` [Bug libfortran/33469] Default formats for real input are not precise enough fxcoudert at gcc dot gnu dot org
2007-09-19 12:38 ` dominiq at lps dot ens dot fr
2007-10-01 23:28 ` fxcoudert at gcc dot gnu dot org
2007-10-02 0:37 ` fxcoudert at gcc dot gnu dot org
2007-10-02 8:29 ` dominiq at lps dot ens dot fr
2007-10-02 23:28 ` fxcoudert at gcc dot gnu dot org
2007-10-02 23:31 ` fxcoudert at gcc dot gnu dot org
2007-10-03 19:30 ` dominiq at lps dot ens dot fr [this message]
2007-10-03 19:34 ` dominiq at lps dot ens dot fr
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