Lazarus
Home
Help
TinyPortal
Search
Login
Register
Lazarus
»
Forum
»
Free Pascal
»
General
(Moderators:
FPK
,
Tomas Hajny
) »
Floating point precision on 64bit Mac
Free Pascal
Website
Downloads
Wiki
Documentation
Bugtracker
Mailing List
Lazarus
Website
Downloads (Laz+FPC)
Packages (OPM)
FAQ
Wiki
Documentation (RTL/FCL/LCL)
Bugtracker
CCR Bugs
IRC channel
GIT
Mailing List
Other languages
Foundation
Website
Useful Wiki Links
Project Roadmap
Getting the Source
Screenshots
How to use the forum
About donations (wiki)
Bookstore
Computer Math and Games in Pascal
(preview)
Lazarus Handbook
Search
Advanced search
Recent
May be useful to somebody
by
Handoko
[
Today
at 07:35:48 am]
How can I draw a rectangl...
by
Handoko
[
Today
at 07:30:55 am]
Draw a line in the Scroll...
by
Handoko
[
Today
at 07:27:54 am]
Offical launch of the 1 B...
by
Handoko
[
Today
at 06:05:11 am]
Debugger crashes with App...
by
trev
[
Today
at 06:00:08 am]
Copyrights Q
by
domasz
[
Today
at 04:56:59 am]
web development using pas...
by
Nate897
[
Today
at 02:04:05 am]
questionable function def...
by
440bx
[
Today
at 01:35:28 am]
Why isn't TTIRadioGroup's...
by
jamie
[
Today
at 12:13:45 am]
Generics - correct syntax
by
jamie
[
Today
at 12:11:50 am]
Same project and two Pcs
by
caiov1n1c1us
[
Today
at 12:04:00 am]
v3.99 code completion que...
by
440bx
[April 22, 2024, 11:08:26 pm]
add new targets to make
by
marcov
[April 22, 2024, 09:32:20 pm]
[SOLVED]RichMemo StringRe...
by
KodeZwerg
[April 22, 2024, 08:44:40 pm]
[SOLVED] LAMW/Linux - Ins...
by
Alcatiz
[April 22, 2024, 08:04:06 pm]
[SOLVED] TimeStampToMSecs...
by
korba812
[April 22, 2024, 06:23:33 pm]
Quirky windows
by
ASerge
[April 22, 2024, 06:23:20 pm]
Access violation when re-...
by
cdbc
[April 22, 2024, 05:39:59 pm]
trunk compiler bug for mi...
by
nickysn
[April 22, 2024, 04:05:11 pm]
FPDebug: Evaluate/Modify ...
by
bpranoto
[April 22, 2024, 03:14:12 pm]
Your best UI design - con...
by
lainz
[April 22, 2024, 02:28:00 pm]
Access violation when ope...
by
Чебурашка
[April 22, 2024, 02:07:58 pm]
Unlocking Files
by
KodeZwerg
[April 22, 2024, 12:39:53 pm]
[SOLVED] what is function...
by
Martin_fr
[April 22, 2024, 12:14:59 pm]
[SOLVED] how to build the...
by
Laksen
[April 22, 2024, 10:45:18 am]
« previous
next »
Print
Pages: [
1
]
Author
Topic: Floating point precision on 64bit Mac (Read 1905 times)
tygraphics
New Member
Posts: 15
Floating point precision on 64bit Mac
«
on:
April 13, 2021, 05:21:49 pm »
I'm not a math person and I've only had two computer science classes back in 1986 when Pascal was the principle teaching language at the University of California. I've been exploring what FPC and am curious about its limitations.
How many places to the right of the decimal point does FPC handle accurately on a 64bit Mac?
Logged
Handoko
Hero Member
Posts: 5158
My goal: build my own game engine using Lazarus
Re: Floating point precision on 64bit Mac
«
Reply #1 on:
April 13, 2021, 05:29:03 pm »
I don't know much about Mac but in general Lazarus/FPC should have at least 19 significant digits if you use Extended or Currency data types, read more:
https://www.freepascal.org/docs-html/ref/refsu5.html
If you're looking for high precision float, maybe this thread can be helpful:
https://forum.lazarus.freepascal.org/index.php/topic,43878.msg307740.html#msg307740
Logged
Jonas Maebe
Hero Member
Posts: 1059
Re: Floating point precision on 64bit Mac
«
Reply #2 on:
April 13, 2021, 06:47:02 pm »
It depends which 64 bit Mac. If it's an Intel Mac, then it indeed has the 80 bits extended type. If it's a 64 bit PowerPC (unlikely) or ARM64/M1 Mac, then the maximum supported native floating point type is double (64 bits).
Logged
tygraphics
New Member
Posts: 15
Re: Floating point precision on 64bit Mac
«
Reply #3 on:
April 13, 2021, 10:22:49 pm »
Thank you!
Quad-Core Intel Core i5
It appears I can get significant results for 20 places.
Logged
Print
Pages: [
1
]
« previous
next »
Lazarus
»
Forum
»
Free Pascal
»
General
(Moderators:
FPK
,
Tomas Hajny
) »
Floating point precision on 64bit Mac
TinyPortal
© 2005-2018