[Cfp-interest 1679] Re: Overflow and HUGE_VAL

[Jim Thomas]

The decimal arithmetic is all IEC 60559. Overflow behavior is well defined without any need to refer to a HUGE_VAL macros.

- Jim Thomas

> On Jun 26, 2020, at 7:29 AM, Fred J. Tydeman <tydeman at tybor.com> wrote:
> 
> Currently, WG14 N2478  7.12.1#5 has:
> 
> If a floating result overflows and default rounding is in effect, then the
> function returns the value of the macro HUGE_VAL, HUGE_VALF, or HUGE_VALL according to the
> return type, ...
> 
> But, since we have added decimal floating-point, do we need to add
> 
> HUGE_VAL_D32, HUGE_VAL_D64, HUGE_VAL_D128
> 
> or reword?
> 
> In addition, 7.22.1.6 The strtodN functions 
> are missing HUGE_VAL_Dn in the returns.
> 
> Also, 7.29.4.1.2 The wcstodN functions
> are also missing HUGE_VAL_Dn in the returns.
> 
> And HUGE_VAL_Dn are missing from Annex B.11
> 
> ---
> 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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