on http://en.wikipedia.org/wiki/IEEE_754 they talk about

quiet and singnaling NaNs - which of these supports D and how?

do i get an execption when a signaling NaN occure?

ciao dennis

dennis luehring Wrote:

> on http://en.wikipedia.org/wiki/IEEE_754 they talk about
> 
> quiet and singnaling NaNs - which of these supports D and how?
> 
> do i get an execption when a signaling NaN occure?
> 
> ciao dennis

Walter can give the definitive answer but I'm pretty sure that (at the moment) D does not use signaling NaNs. That is, any signaling NaNs that occur are only visible as quiet NaNs, and therefore, no exceptions are thrown.

Paul D. Anderson wrote:
> dennis luehring Wrote:
> 
>> on http://en.wikipedia.org/wiki/IEEE_754 they talk about
>> 
>> quiet and singnaling NaNs - which of these supports D and how?
>> 
>> do i get an execption when a signaling NaN occure?
>> 
>> ciao dennis
> 
> Walter can give the definitive answer but I'm pretty sure that (at
> the moment) D does not use signaling NaNs. That is, any signaling
> NaNs that occur are only visible as quiet NaNs, and therefore, no
> exceptions are thrown.
> 


Signaling NaNs have fallen out of favor. No exceptions get raised for them.

Walter Bright schrieb:
> Paul D. Anderson wrote:
>> dennis luehring Wrote:
>> 
>>> on http://en.wikipedia.org/wiki/IEEE_754 they talk about
>>> 
>>> quiet and singnaling NaNs - which of these supports D and how?
>>> 
>>> do i get an execption when a signaling NaN occure?
>>> 
>>> ciao dennis
>> 
>> Walter can give the definitive answer but I'm pretty sure that (at
>> the moment) D does not use signaling NaNs. That is, any signaling
>> NaNs that occur are only visible as quiet NaNs, and therefore, no
>> exceptions are thrown.
>> 
> 
> 
> Signaling NaNs have fallen out of favor. No exceptions get raised for them.

a signaling NaN becomes then just a quiet NaN (as Paul D. Anderson said) - no different behaviour?

ciao dennis

dennis luehring wrote:
> Walter Bright schrieb:
>> Paul D. Anderson wrote:
>>> dennis luehring Wrote:
>>>
>>>> on http://en.wikipedia.org/wiki/IEEE_754 they talk about
>>>>
>>>> quiet and singnaling NaNs - which of these supports D and how?
>>>>
>>>> do i get an execption when a signaling NaN occure?
>>>>
>>>> ciao dennis
>>>
>>> Walter can give the definitive answer but I'm pretty sure that (at
>>> the moment) D does not use signaling NaNs. That is, any signaling
>>> NaNs that occur are only visible as quiet NaNs, and therefore, no
>>> exceptions are thrown.
>>>
>>
>>
>> Signaling NaNs have fallen out of favor. No exceptions get raised for them.
> 
> a signaling NaN becomes then just a quiet NaN (as Paul D. Anderson said) - no different behaviour?

None other than what the CPU does. D treats the two as the same.