Re: Quick inverse square root

["Jeffrey R. Carter" <spam.jrcarter.not@spam.not.acm.org>]

On 1/4/21 4:50 AM, Matt Borchers wrote:
> On Sunday, January 3, 2021 at 6:47:15 PM UTC-5, Jeffrey R. Carter wrote:
>>
>> if F'Size = 32 then
>>    return QISR32 (A);
>> elsif F'Size = 64 then
>>    return QISR64 (A);
>> else
>>    raise Program_Error with "F'Size must be 32 or 64";
>> end if;
> 
> This requires duplication of algorithm which is what the generic is supposed to avoid.  This would be like a  psuedo-generic.

Well, no. Your original generic function would be inside the generic function, 
and QISR32 and QISR64 would be instantiations of it with Unsigned_32 and 
Unsigned_64 respectively.

-- 
Jeff Carter
"Why, the Mayflower was full of Fireflies, and a few
horseflies, too. The Fireflies were on the upper deck,
and the horseflies were on the Fireflies."
Duck Soup
95