These links should help:

http://www.google.com/search?q=borland+floating+point+problem
http://www.virtualdub.org/blog/pivot/entry.php?id=53
http://homepages.borland.com/ccalvert/TechPapers/FloatingPoint.html

Note that it is possible that you are using libraries which are 
dynamically linked (via DLLs) and therefore screw up those settings only 
later - this will in particular be true if you compile any external 
plugins via Borland's compiler.

There is actually a hack in sqWin32Intel.c (in squeakExceptionHandler()) 
which attempts to "fix" any such problems and I wonder why this isn't 
kicking in - if you're using a debugger make sure that it does not 
handle FPU exceptions but passes them onto the application's handler (I 
don't remember Borland but MSVC has settings that allow passing certain 
exceptions to the application and that's what you want).

Cheers,
   - Andreas

Vagelis Savvas wrote:
> Hi folks,
> i am trying to compile the 3.6.2 VM on Windows using a
> Borland compiler (in order to have a decent debugger).
> Thus i cant use gnu-interp.c which requires labels as values
> (BC_JUMP_TABLE in sqGnu.h is unaccepted for the Borland compiler).
> I've managed to build the VM and all internal plugins
> with minor source code changes (mostly to deal with union
> member access). So i'm pretty confident that i havent broken
> anything.
> Unfortunately i am getting a runtime error about an invalid
> floating point operation at the very beggining of the
> VM's execution. The error happens in loadFloatOrIntFrom
> which in my case gets called from primitiveFloatEqualtoArg(..)
> (which gets called at primitive 182).
> After tweaking all possible compiler options that felt
> like having an effect on the problem i gave up and started
> typing what you are reading right now.
> Any insight would be greatly appreciated. Andreas? Tim?
> 
> Regards
> 
> Vagelis
> 
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