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* [Bug fortran/14394] New: [gfortran] Intrinsic TAN function returns incorrect value
@ 2004-03-03 2:54 bdavis9659 at comcast dot net
2004-03-03 3:56 ` [Bug fortran/14394] " pinskia at gcc dot gnu dot org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: bdavis9659 at comcast dot net @ 2004-03-03 2:54 UTC (permalink / raw)
To: gcc-bugs
This test distilled from the NIST F77 compiler validation suite, test FM374:
$ cat z.f
REAL AVS,BVS
BVS = 1.5747025767
AVS = TAN(BVS)
PRINT*,AVS
END
$ /usr/local/bin/gfortran -static -g z.f
$ ./a.out
-255.9724
The expected value is -256 +- 0.02 (according to the test)
g77 meets this requirement:
$ g77 z.f
$ ./a.out
-255.995834
Looking at the output of -fdump-tree-all
$ cat z.f.t03.original
MAIN__ ()
{
real4 bvs;
real4 avs;
bvs = 1.5747029781341552734375e+0;
avs = __builtin_tanf (bvs);
_gfortran_filename = "z.f";
_gfortran_line = 4;
_gfortran_ioparm.unit = 6;
_gfortran_ioparm.list_format = 1;
_gfortran_st_write ();
_gfortran_transfer_real (&avs, 4);
_gfortran_st_write_done ();;
}
The difference in the two constants explains the difference, so it appears to be
a problem in the fortran front end instead of tan().
--
Summary: [gfortran] Intrinsic TAN function returns incorrect
value
Product: gcc
Version: tree-ssa
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: bdavis9659 at comcast dot net
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14394
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/14394] [gfortran] Intrinsic TAN function returns incorrect value
2004-03-03 2:54 [Bug fortran/14394] New: [gfortran] Intrinsic TAN function returns incorrect value bdavis9659 at comcast dot net
@ 2004-03-03 3:56 ` pinskia at gcc dot gnu dot org
2004-03-10 4:46 ` pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-03-03 3:56 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-03-03 03:56 -------
Actually this might not be a front-end problem but then again it might be parsing the number wrong.
Well it works in the C front-end so it looks like the number is being parsed wrong or just getting a
rounding error when parsing.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Keywords| |wrong-code
Last reconfirmed|0000-00-00 00:00:00 |2004-03-03 03:56:01
date| |
Target Milestone|--- |tree-ssa
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14394
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/14394] [gfortran] Intrinsic TAN function returns incorrect value
2004-03-03 2:54 [Bug fortran/14394] New: [gfortran] Intrinsic TAN function returns incorrect value bdavis9659 at comcast dot net
2004-03-03 3:56 ` [Bug fortran/14394] " pinskia at gcc dot gnu dot org
@ 2004-03-10 4:46 ` pinskia at gcc dot gnu dot org
2004-04-11 16:06 ` cvs-commit at gcc dot gnu dot org
2004-04-11 17:00 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-03-10 4:46 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-03-10 04:46 -------
Patch is here: <http://gcc.gnu.org/ml/gcc-patches/2004-03/msg00828.html>.
--
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14394
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/14394] [gfortran] Intrinsic TAN function returns incorrect value
2004-03-03 2:54 [Bug fortran/14394] New: [gfortran] Intrinsic TAN function returns incorrect value bdavis9659 at comcast dot net
2004-03-03 3:56 ` [Bug fortran/14394] " pinskia at gcc dot gnu dot org
2004-03-10 4:46 ` pinskia at gcc dot gnu dot org
@ 2004-04-11 16:06 ` cvs-commit at gcc dot gnu dot org
2004-04-11 17:00 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2004-04-11 16:06 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-04-11 12:49 -------
Subject: Bug 14394
CVSROOT: /cvs/gcc
Module name: gcc
Branch: tree-ssa-20020619-branch
Changes by: pbrook@gcc.gnu.org 2004-04-11 12:49:14
Modified files:
gcc/fortran : ChangeLog trans-const.c
Log message:
PR 14394
* trans-const.c (gfc_conv_mpf_to_tree): Loosen the maximum digits of
the real value when converting mpf to string.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fortran/ChangeLog.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.136&r2=1.1.2.137
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fortran/trans-const.c.diff?cvsroot=gcc&only_with_tag=tree-ssa-20020619-branch&r1=1.1.2.6&r2=1.1.2.7
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14394
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/14394] [gfortran] Intrinsic TAN function returns incorrect value
2004-03-03 2:54 [Bug fortran/14394] New: [gfortran] Intrinsic TAN function returns incorrect value bdavis9659 at comcast dot net
` (2 preceding siblings ...)
2004-04-11 16:06 ` cvs-commit at gcc dot gnu dot org
@ 2004-04-11 17:00 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-04-11 17:00 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-04-11 16:06 -------
Fixed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14394
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2004-04-11 16:06 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2004-03-03 2:54 [Bug fortran/14394] New: [gfortran] Intrinsic TAN function returns incorrect value bdavis9659 at comcast dot net
2004-03-03 3:56 ` [Bug fortran/14394] " pinskia at gcc dot gnu dot org
2004-03-10 4:46 ` pinskia at gcc dot gnu dot org
2004-04-11 16:06 ` cvs-commit at gcc dot gnu dot org
2004-04-11 17:00 ` pinskia at gcc dot gnu dot org
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