[Cfp-interest 1301] Re: isnoralized()

[Stephen Canon]

Ah, misread the list name as IEEE instead of CFP. So, yes, adding the macro would get you somewhere for S/360 and double-double. But it’s still not clear to me what the utility of this operation is.

> On Apr 28, 2019, at 3:22 PM, Stephen Canon <scanon at apple.com> wrote:
> 
> I don’t get it. The S/360 hex format and double-double aren’t IEEE 754 formats, so adding an isnormalized( ) classification macro to IEEE 754 isn’t going to do anything for them.
> 
> For decimal, I think you mean “cohort” rather than “quantum”—what you’ve written doesn’t make sense otherwise. But it’s not clear to me what you want to do with this bit once you get it. Can you provide examples of how you intend to use the result of this macro?
> 
> – Steve
> 
>> On Apr 28, 2019, at 3:35 AM, Fred J. Tydeman <tydeman at tybor.com> wrote:
>> 
>> I believe that we might need to add a isnormalized() classification macro to 7.12.3.
>> Of the many members of the same quantum for decimal FP numbers, only one is
>> normalized.  The IBM S/360 hex format has un-normalized numbers (as well as 
>> normalized one).  And double-double has both normalized and non-normalized 
>> finite normal numbers.
>> 
>> ---
>> 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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