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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 19:34:00 -0000 [thread overview]
Message-ID: <20071003193436.26812.qmail@sourceware.org> (raw)
In-Reply-To: <bug-33469-12313@http.gcc.gnu.org/bugzilla/>
------- Comment #11 from dominiq at lps dot ens dot fr 2007-10-03 19:34 -------
BTW I have forgotten to explain why I have to use an auxiliary variable 'z': if
I usenearest(0.0_8,1.0_8); I get
default_format_1_db.f90:70.29:
if (abs(x-y)>nearest(0.0_8,1.0_8)) print *, x, y, x-y
1
Error: Result of NEAREST underflows its kind at (1)
default_format_1_db.f90:84.29:
if (abs(x-y)>nearest(0.0_8,1.0_8)) print *, x, y, x-y
1
Error: Result of NEAREST underflows its kind at (1)
default_format_1_db.f90:93.25:
use test_default_format
1
Fatal Error: Can't open module file 'test_default_format.mod' for reading at
(1): No such file or directory
Producing a hard error for an underflow is indeed an incredibely clever idea!-(
Reminds me of a compiler which crunched NaNs and Infs with delight, but aborted
on underflow, very handy for waves simulations!
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33469
prev parent reply other threads:[~2007-10-03 19:34 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
2007-10-03 19:34 ` dominiq at lps dot ens dot fr [this message]
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