V3 PATCH: numeric_limits<> support, fix PR/3865

[Ulrich Drepper]

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Richard Henderson wrote:
> On Mon, Sep 02, 2002 at 12:39:40PM -0700, Ulrich Drepper wrote:
> 
>> I'd rather see this mathod extended:
>>
>>  __builtin_nan ("...")
>>  __builtin_qnan ("...")
>>  __builtin_snan ("...")
>>  __builtin_inf ()
> 
> 
> Sure.  I suppose __builtin_qnan is like __builtin_nan except that the
> mantessa is forced to be quiet?

Yes.  And it also allows for a different default nan (if this should be 
necessary).

   __builtin_nan ("")

could be either __builtin_snan ("") or __builtin_qnan ("").


And obviously we need float and long double versions as well.

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