[Cfp-interest 1830] Re: pow() and signaling NaN

[Jim Thomas]

F.2.1 #3 says “… This annex uses the term NaN, unless explicitly qualified, to denote quiet NaN …”.

- Jim Thomas

> On Oct 28, 2020, at 9:27 AM, Fred J. Tydeman <tydeman at tybor.com> wrote:
> 
> IEEE-754 has
> pow (+1, y) is 1 for any y (even a quiet NaN)
> pow (x, ±0) is 1 if x is not a signaling NaN
> 
> 
> C23 F.10.4.5 has:
> --pow(+1, y) returns 1 for any y, even a NaN.
> -- pow(x, ±0) returns 1 for any x, even a NaN.
> 
> 
> I am not sure what WG14's convention is on 
> NAN vs quiet NAN vs signaling NAN
> 
> Do we need to add 'quiet' before NaN for pow()?
> 
> 
> ---
> Fred J. Tydeman        Tydeman Consulting
> tydeman at tybor.com      Testing, numerics, programming
> +1 (702) 608-6093      Vice-chair of PL22.11 (ANSI "C")
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