FORTRAN Inconsistencies...

FORTRAN Inconsistencies...

[Andrew Stone]

Hello all,

First off, I apologize if this is not the correct forum for this.

I am working on a FORTRAN port from the Salford compiler
to the g77 compiler for too many reasons to list.  Everything
is good so far, have wrapped the FORTRAN with C++, that is being
called by JAVA via JSP.

Here's the odd thing, when I run the process i get, say 54354 as a net
result (543.54)- I don't pass any floats, only integers are used in the
entire process, but I run the same process again (with the exact same input
parameters) and I may get 54354, or 54355, or 54353.  There is never a
variance
of more than three.

I've traced the inputs and outputs all the way through (from the JSP through
the JAVA
object, through the C++ into the FORTRAN) and back out.  The inputs never
change
at any stage, and neither do the outputs. So, I am getting these differences
apparently
based on the same inputs.

First thing that came to mind was rounding, maybe something was missing.
But there are
two reasons I don't think it is.  1) I have run this same process with a
simple java program
(outside the APACHE web environment) and I don't get these inconsistencies
2) This code has
been used for over a decade, I would think someone would have caught this by
now (but you never know).

It's my example of testing outside the JSP/APACHE/TOMCAT environment that is
confusing me.
Essentially the same code calling the same exact same shared object acts
differently?  I was told
that my simple test could be acting the same way but because of the
differences in memory usage
under APACHE/TOMCAT as opposed to running a command line app, it just might
not be so evident.

So...is there a compiler option that organizes the memory usage differently
that may be of help with
this?

Here's my FORTRAN building exerpt:

g77 -ff77 -fPIC -finit-local-zero -fno-automatic -fugly-logint  -c
$source_f -o $object_f

Here's my linking exerpt:

gcc -ff77 -fPIC  -finit-local-zero -fno-automatic -fugly-logint -shared -mim
pure-text
      -o libjniCheck.so -I/usr/java/include -I/usr/java/include/solaris
      cbdNative.cpp objects/*.o -lg2c -lm -lc -lgcc

That's it...any clues or hints where to go instead of here would be greatly
appreciated.

thanks,
andy

Re: FORTRAN Inconsistencies...

[Toon Moene]

Andrew Stone wrote:

> Here's my FORTRAN building exerpt:
> 
> g77 -ff77 -fPIC -finit-local-zero -fno-automatic -fugly-logint  -c
> $source_f -o $object_f

Please compile (in addition to those flags) with -ffloat-store, to see
if the extra precision of the ix86 floating point registers plays a
role.

Thanks in advance,

-- 
Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
Join GNU Fortran 95: http://g95.sourceforge.net/ (under construction)

Re: FORTRAN Inconsistencies...

[Andrew Stone]

I will definitely give this a shot first thing Monday morning.

thanks,
andy
----- Original Message ----- 
From: "Toon Moene" <toon@moene.indiv.nluug.nl>
To: "Andrew Stone" <ston1957@bellsouth.net>
Cc: <gcc-help@gcc.gnu.org>
Sent: Saturday, July 13, 2002 11:18 AM
Subject: Re: FORTRAN Inconsistencies...


> Andrew Stone wrote:
> 
> > Here's my FORTRAN building exerpt:
> > 
> > g77 -ff77 -fPIC -finit-local-zero -fno-automatic -fugly-logint  -c
> > $source_f -o $object_f
> 
> Please compile (in addition to those flags) with -ffloat-store, to see
> if the extra precision of the ix86 floating point registers plays a
> role.
> 
> Thanks in advance,
> 
> -- 
> Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290
> Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
> Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
> Join GNU Fortran 95: http://g95.sourceforge.net/ (under construction)

RE: FORTRAN Inconsistencies...

[Andrew Stone]

Added the -ffloat-store flag, but no change to current action.

Am now trying some other flags, thanks for the advice.

-andy

-----Original Message-----
From: gcc-help-owner@gcc.gnu.org [mailto:gcc-help-owner@gcc.gnu.org]On
Behalf Of Toon Moene
Sent: Saturday, July 13, 2002 11:19 AM
To: Andrew Stone
Cc: gcc-help@gcc.gnu.org
Subject: Re: FORTRAN Inconsistencies...


Andrew Stone wrote:

> Here's my FORTRAN building exerpt:
> 
> g77 -ff77 -fPIC -finit-local-zero -fno-automatic -fugly-logint  -c
> $source_f -o $object_f

Please compile (in addition to those flags) with -ffloat-store, to see
if the extra precision of the ix86 floating point registers plays a
role.

Thanks in advance,

-- 
Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
Join GNU Fortran 95: http://g95.sourceforge.net/ (under construction)

RE: FORTRAN Inconsistencies...

[Andrew Stone]

Problem solved.  Was issue outside of FORTRAN code environment.

Thanks for your help Toon, it was greatly appreciated.
-andy

-----Original Message-----
From: gcc-help-owner@gcc.gnu.org [mailto:gcc-help-owner@gcc.gnu.org]On
Behalf Of Andrew Stone
Sent: Monday, July 15, 2002 9:16 AM
To: Toon Moene
Cc: gcc-help@gcc.gnu.org
Subject: RE: FORTRAN Inconsistencies...


Added the -ffloat-store flag, but no change to current action.

Am now trying some other flags, thanks for the advice.

-andy

-----Original Message-----
From: gcc-help-owner@gcc.gnu.org [mailto:gcc-help-owner@gcc.gnu.org]On
Behalf Of Toon Moene
Sent: Saturday, July 13, 2002 11:19 AM
To: Andrew Stone
Cc: gcc-help@gcc.gnu.org
Subject: Re: FORTRAN Inconsistencies...


Andrew Stone wrote:

> Here's my FORTRAN building exerpt:
> 
> g77 -ff77 -fPIC -finit-local-zero -fno-automatic -fugly-logint  -c
> $source_f -o $object_f

Please compile (in addition to those flags) with -ffloat-store, to see
if the extra precision of the ix86 floating point registers plays a
role.

Thanks in advance,

-- 
Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
Join GNU Fortran 95: http://g95.sourceforge.net/ (under construction)