Re: 32-bit float and 64-bit float

[Victor Porton <porton@narod.ru>]

Dmitry A. Kazakov wrote:

> On 14/08/2017 00:29, Victor Porton wrote:
>> What is the best way to define in Ada types which are expected to
>> contain:
>> 
>> 1. 64-bit floating point numbers (incl. ±Inf, ±0, NaN);
>> 
>> 2. 32-bit floating point numbers (incl. ±Inf, ±0, NaN).
> 
> There is no way since you specified neither the precision and range nor
> the floating-point representation format IEEE 754, IBM, DEC etc.
> 
> Ada's way is the former. The latter is not possible in general.
> 
> If you have a requirement to support a specific representation, e.g. for
> I/O you have to convert it forth and back to an Ada type most close to
> it. In Simple Components there are packages to convert IEEE 754 floats:
> 
> http://www.dmitry-kazakov.de/ada/components.htm#IEEE_754

I understand this.

My question was how to do it in the "best" (not "perfect") way.

I think Float and Long_Float will do the job on most compilers and machines. 
But maybe I should instead use "digits" in Ada? If yes, then how many 
digits?

-- 
Victor Porton - http://portonvictor.org