[M3devel] FloatMode

[Tony Hosking]

On 11 Jan 2010, at 23:55, Jay K wrote:

> I thought FloatMode was only related to floating point.
> So I looked:
>  
>    "IntOverflow" = an integer operation produced a result whose
>    absolute value is too large to be represented.
>  
>    "IntDivByZero" = integer "DIV" or "MOD" by zero.
> \end{quote}
> 
>  
> This part of it should be easy to implement for all architectures.
> The entire thing probably isn't too difficult either on many platforms either.
>  
> However...I was surprised by this.
> I thought the real "intent" in Modula-3 to not have this be configurable
> and endeavor for overflow and divide by zero to always immediately
> raise an exception? The only "out" is that it might not get implemented on some platforms for some reason?

Yes, that's the issue.

>  For the floating point stuff:
>  
> Probably like other per-platform code, this should be done in #ifdefed C.

Agreed...  does that mean you will bite?  ;-)

>  
> http://msdn.microsoft.com/en-us/library/e9b52ceh(VS.80).aspx
> http://kernel.org/doc/man-pages/online/pages/man3/fetestexcept.3.html
> etc.
>  
>  - Jay
> 

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