On 10/26/06, Travis Oliphant <[EMAIL PROTECTED]> wrote:
How to check overflow? According to the documentation the flag is not set by the hardware. And the precision is variable! Somewhere in the neighborhood of 31 decimal digits, more or less, depending. So I think it is hard to figure out what to do here.
Chuck.
Ted Horst wrote:
> On Mac OS X tiger (10.4) ppc, long double has increased precision but
> the same range as double (it really is 128 bits not 80, btw), so
> e**1000 is inf, so this is not really an error.
>
>
Thanks for the clarification. Long-double is not standard across
platforms with different platforms choosing to do different things with
the extra bytes. This helps explain one more platform.
> I'm not sure what is the right thing to do in the test, check for
> overflow? Also, finfo has never worked properly for this type.
>
In machar.py is the code that runs to detect all of the parameters. I
think the code should be moved to C as detecting precision on a
long-double takes too long.
The overflow check is a good idea. The test should probably check for
overflow and not try to run if it's detected.
How to check overflow? According to the documentation the flag is not set by the hardware. And the precision is variable! Somewhere in the neighborhood of 31 decimal digits, more or less, depending. So I think it is hard to figure out what to do here.
Chuck.
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