[Cfp-interest] WG14 IEEE 754-C binding meeting minutes 2018/07/25

[Jim Thomas]

> On Jul 26, 2018, at 3:59 PM, Fred J. Tydeman <tydeman at tybor.com> wrote:
> 
> On Wed, 25 Jul 2018 11:24:55 -0500 Rajan Bhakta wrote:
>> 
>>   Fred: Recheck 'Functions and infinity' issues with 754 draft 238. - 
>> 
> 
> IEEE 754 vs 18661 (and C17) for infinity
> 
> Possible global issue:  754 uses an unsigned infinity and C uses +/-infinity.
> One such example is: remainder(x,inf) vs remainder(x,+/-inf).
> But, a counter example is: cosh(+/-inf) is +inf
> 
> I am assuming that 754's unsigned infinity is the same as +/-infinity.


Fred, I think that is the right assumption. 

David and Mike, given that none of the 754 specification levels (Table 3.1) have (unsigned) inf and that there is no stated convention (that I see) about (unsigned) inf, it seems like it would be better for 754 to use +/-inf instead.

- Jim Thomas