Hi,

I was playing a bit with floating point types when I noticed this discrepancy:

From math.pp

{$ifdef FPC_HAS_TYPE_EXTENDED}
    const
      MinExtended  =  3.4e-4932;
      MaxExtended  =  1.1e+4932;
{$endif FPC_HAS_TYPE_EXTENDED}

From fpc reference guide:

Extended 1.9E-4932 .. 1.1E4932

3.64519953188247460253E-4951 seems to be the lowest value I can get while testing (Win 32 bit).

What's up with that?

Bart

Hi, it seems you are right: https://en.wikipedia.org/wiki/Extended_precision#Working_range  
V.
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Hi,

I was playing a bit with floating point types when I noticed this discrepancy:

From math.pp

 {$ifdef FPC_HAS_TYPE_EXTENDED}
    const
      MinExtended  =  3.4e-4932;
      MaxExtended  =  1.1e+4932;
 {$endif FPC_HAS_TYPE_EXTENDED}

From fpc reference guide:
Extended 1.9E-4932 .. 1.1E4932

3.64519953188247460253E-4951 seems to be the lowest value I can get while testing (Win 32 bit).

What's up with that?

Bart

Vojtěch Čihák wrote

Hi, it seems you are right: https://en.wikipedia.org/wiki/Extended_precision#Working_range

From syshelph.inc:

  TExtendedHelper = Type Helper for Extended
  ...
    Epsilon           : Extended = 3.64519953188247460253e-4951;

This would be the equivalent of Math.MinExtended I guess.

Bart