[cfp-interest 3634] Re: Annex F - F.10.9.2 - The nan functions

[Jim Thomas]

F.10.1 #10 says
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Whether or when library functions not listed in Table F.2 raise the "inexact" floating-point exception is unspecified, unless stated otherwise.
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The nan() functions are not in Table F.2, so could raise “inexact” if F.10.9.2 didn’t specify otherwise. 

It suffices to prohibit an “underflow” exception too, because with default exception handling that would cause an “inexact” exception.

- Jim Thomas

> On Sep 24, 2025, at 2:25 AM, Damian McGuckin <damianm at esi.com.au> wrote:
> 
> 
> The second paragraph says:
> 
> 	The returned value is exact and independent of the current rounding
> 	direction mode?
> 
> Why would it say "is exact"?
> 
> The function copysign() just says
> 
> 	The returned value is independent of the current rounding
>        direction mode?
> 
> No mention of exact.
> 
> Thanks - Damian
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