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* Re: ada/6911: Sin and Cos returns bad result or exception
@ 2002-11-20 13:56 Joakim Olsson
0 siblings, 0 replies; 5+ messages in thread
From: Joakim Olsson @ 2002-11-20 13:56 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR ada/6911; it has been noted by GNATS.
From: Joakim Olsson <joakim.olsson@hiq.se>
To: bam@snoopy.apana.org.au, gcc-gnats@gcc.gnu.org,
gcc-prs@gcc.gnu.org, 148529@bugs.debian.org,
gcc-bugs@gcc.gnu.org, nobody@gcc.gnu.org
Cc:
Subject: Re: ada/6911: Sin and Cos returns bad result or exception
Date: Thu, 14 Nov 2002 11:23:28 +0100
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6911
Hi
I have'nt a clue where this mail is going so bare with me (I'm a newbie to gcc ;-)
I've noticed the same bug with 3.1 and 3.2 on RedHat PC-Intel.
I couldn't find a solution in the database so I'm posting my analyse here.
The configure seems to do something wrong.
There are several versions of the package "Ada.Numerics.Aux" and
the version that is used is the one called 86numaux.ads and it's body.
This package implements Sin and Cos and other stuff with assambler-instructions
and not uses interface to the C-functions in libm.a.
I don't know why but,,, well the assambler doesn't work.
In the rpm from Ada for Linux Team the version uses interface to C-functions and that version seems to work.
PS
If I've done something wrong by posting this mail, pleas don't hesitate to tell me.
Is there a simple solution out there ??? please tell me.
DS
best regards
/joakim olsson
HiQ Approve AB
SWEDEN
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: ada/6911: Sin and Cos returns bad result or exception
@ 2003-05-13 6:38 steven
0 siblings, 0 replies; 5+ messages in thread
From: steven @ 2003-05-13 6:38 UTC (permalink / raw)
To: 148529, bam, gcc-bugs, gcc-prs, nobody
Synopsis: Sin and Cos returns bad result or exception
State-Changed-From-To: open->closed
State-Changed-By: steven
State-Changed-When: Tue May 13 06:37:57 2003
State-Changed-Why:
Reported fixed after Dara asked for feedback
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6911
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: ada/6911: Sin and Cos returns bad result or exception
@ 2003-05-13 4:06 Brian May
0 siblings, 0 replies; 5+ messages in thread
From: Brian May @ 2003-05-13 4:06 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR ada/6911; it has been noted by GNATS.
From: Brian May <bam@snoopy.apana.org.au>
To: Dara Hazeghi <dhazeghi@yahoo.com>
Cc: 148529@bugs.debian.org, gcc-gnats@gcc.gnu.org,
nobody@gcc.gnu.org, fw@deneb.enyo.de
Subject: Re: ada/6911: Sin and Cos returns bad result or exception
Date: Tue, 13 May 2003 14:05:30 +1000
On Mon, May 12, 2003 at 04:31:18PM -0700, Dara Hazeghi wrote:
> the final note in the Debian bug trail for this bug noted that this
> problem was fixed on gcc 3.3 branch. Is this the case? Right now,
> mainline and 3.3 branch produce this for me:
>
> -7.07105E-01
> 0.00000E+00
> -8.74228E-08
> 1.74846E-07
> -7.07105E-01
>
> (the second testcase). Can anyone confirm the state of this bug. Thanks,
For:
--- cut ---
with Ada.Text_IO;
use Ada.Text_IO;
with Ada.Numerics;
use Ada.Numerics;
with Ada.Numerics.Generic_Elementary_Functions;
with Aux;
use Aux;
procedure TestBug2 is
type F is new Float;
subtype Radians is F;
package Maths is new Generic_Elementary_Functions(F);
use Maths;
begin
Ada.Text_IO.Put_Line(Double'Image(Aux.Sin(5.49779)));
Ada.Text_IO.Put_Line(Double'Image(Aux.Sin(0.0*pi)));
Ada.Text_IO.Put_Line(Double'Image(Aux.Sin(1.0*pi)));
Ada.Text_IO.Put_Line(Double'Image(Aux.Sin(2.0*pi)));
Ada.Text_IO.Put_Line(Double'Image(Aux.Sin(5.49779)));
Ada.Text_IO.Put_Line(F'Image(Sin(5.49779)));
Ada.Text_IO.Put_Line(F'Image(Sin(0.0*pi)));
Ada.Text_IO.Put_Line(F'Image(Sin(1.0*pi)));
Ada.Text_IO.Put_Line(F'Image(Sin(2.0*pi)));
Ada.Text_IO.Put_Line(F'Image(Sin(5.49779)));
end TestBug2;
--- cut ---
I get:
--- cut ---
-7.07104761532644598E-01
0.00000000000000000E+00
-5.42101086242752217E-20
1.08420217248550443E-19
-7.07104761532644598E-01
-7.07105E-01
0.00000E+00
-8.74228E-08
1.74846E-07
-7.07105E-01
--- cut ---
Which looks much better then before, but I haven't
checked the results against a calculator...
This is the same code that failed before.
--
Brian May <bam@snoopy.apana.org.au>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: ada/6911: Sin and Cos returns bad result or exception
@ 2003-05-12 23:36 Dara Hazeghi
0 siblings, 0 replies; 5+ messages in thread
From: Dara Hazeghi @ 2003-05-12 23:36 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR ada/6911; it has been noted by GNATS.
From: Dara Hazeghi <dhazeghi@yahoo.com>
To: 148529@bugs.debian.org, gcc-gnats@gcc.gnu.org, bam@snoopy.apana.org.au,
nobody@gcc.gnu.org, fw@deneb.enyo.de
Cc:
Subject: Re: ada/6911: Sin and Cos returns bad result or exception
Date: Mon, 12 May 2003 16:31:18 -0700
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-
trail&database=gcc&pr=6911
Hello,
the final note in the Debian bug trail for this bug noted that this
problem was fixed on gcc 3.3 branch. Is this the case? Right now,
mainline and 3.3 branch produce this for me:
-7.07105E-01
0.00000E+00
-8.74228E-08
1.74846E-07
-7.07105E-01
(the second testcase). Can anyone confirm the state of this bug. Thanks,
Dara
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: ada/6911: Sin and Cos returns bad result or exception
@ 2002-11-22 13:59 Brian May
0 siblings, 0 replies; 5+ messages in thread
From: Brian May @ 2002-11-22 13:59 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR ada/6911; it has been noted by GNATS.
From: Brian May <bam@snoopy.apana.org.au>
To: Joakim Olsson <joakim.olsson@hiq.se>
Cc: gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org,
148529@bugs.debian.org, gcc-bugs@gcc.gnu.org, nobody@gcc.gnu.org
Subject: Re: ada/6911: Sin and Cos returns bad result or exception
Date: Mon, 18 Nov 2002 14:46:24 +1100
On Thu, Nov 14, 2002 at 11:23:28AM +0100, Joakim Olsson wrote:
> I have'nt a clue where this mail is going so bare with me (I'm a newbie to gcc ;-)
It come to me, and the Debian BTS (148529@bugs.debian.org).
Presumably it also went into the gcc GNATS system.
The nobody@gcc.gnu.org address looks kind of funny...
> This package implements Sin and Cos and other stuff with assambler-instructions
> and not uses interface to the C-functions in libm.a.
The assembler code appears to be exactly the same on gnat 3.14p,
where it works. In fact, I think the whole file is the same.
> I don't know why but,,, well the assambler doesn't work.
I suspect that support for any assembler code is badly broken, but my
knowledge of assembler code in Ada is somewhat flakey. I tried moving
the assembler code to me source code, but it stopped working even with
gnat 3.14p, which was perviously working.
It wouldn't surprise me if the assembler code is working, but
for some reason that parameters aren't getting passed to/from
the Ada code.
At one stage I did look at this using a debugger and viewing
the assembler code, but I couldn't see anything that looked
obviously wrong.
> In the rpm from Ada for Linux Team the version uses interface to
> C-functions and that version seems to work.
>
>
> PSIf I've done something wrong by posting this mail, pleas don't
Nothing wrong that I am aware of.
> hesitate to tell me. Is there a simple solution out there ??? please
> tell me. DS
Create interfaces to the C-functions?
Use gnat 3.14?
Sorry, these are the only two solutions I know of (not tested the first
one myself).
--
Brian May <bam@snoopy.apana.org.au>
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2003-05-13 6:38 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2002-11-20 13:56 ada/6911: Sin and Cos returns bad result or exception Joakim Olsson
2002-11-22 13:59 Brian May
2003-05-12 23:36 Dara Hazeghi
2003-05-13 4:06 Brian May
2003-05-13 6:38 steven
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