[fpc-devel] Documentation on Real types

Graeme Geldenhuys graemeg.lists at gmail.com
Tue Nov 2 07:40:52 CET 2010

Hi Michael,

Do you think it is worth mention the information listed below in the FPC
Language Reference?  I made DocView annotations in my local ref.inf
document, but it might be useful to others as well, hence my thought of
adding it to the official docs.

At first glance, I couldn't see that the 2.4.0 ref.pdf mentions this info.
It does mention some times are processor dependant, but it doesn't make it
as clear as below. Please correct me if I am wrong.

Op 2010-11-01 16:33, Hans-Peter Diettrich het geskryf:
>> FPC has Extended and it's rang is 19-20 significant digits with range:
>>    1.9E-4932 – 1.1E4932
>> It's size is 10 bytes.
> AFAIK this type is not available on x64 architecture, and the use of the 
> FPU is discouraged as well - has somebody a reference to this strange 
> change? Are 128 bit reals available now, as a replacement?
> That's why a x64 system even cannot cross-compile for i386 (and other) 
> targets, without using an FPU emulator.


Op 2010-11-01 14:23, Jonas Maebe het geskryf:
>> My question was more: Is Extended usable/enabled on Win64 or is
>> it Extended=Double as well?
> Extended = double on Win64 in FPC as well.

  - Graeme -

fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal

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