Re: [cc65] OT: SIN/LOG/EXP/SQR calculations?

Hi!

-------- Original-Nachricht --------
> Datum: Thu, 22 Mar 2012 10:15:36 -0700 (PDT)
> Von: Joseph Rose <rose.joseph12@yahoo.com>
> An: cc65 mailing list <cc65@musoftware.de>
> Betreff: [cc65] OT: SIN/LOG/EXP/SQR calculations?

> Sorry about the OT question, but I want to calculate the functions in the
> subject heading for future work with graphics.  I could probably use other
> functions as well.  I have only a high-school education; otherwise, I
> wouldn't be asking here.  :(

Here are some assembler sources:

http://codebase64.org/doku.php?id=base:floating_point_routines_for_the_6502

More interesting (to me) are the c-sources of softfloat:

http://www.jhauser.us/arithmetic/SoftFloat.html

Details on the 32-bit float format:

http://en.wikipedia.org/wiki/IEEE_754-2008

There's also a mapping of c64 rom routines to cc65 (from sauhund), 
but the syntax is not very readable, since cc65 has no floating 
operators then. You can see the problem in a demo app here:

http://www.forum64.de/wbb3/board25-coder-unter-sich/board308-programmieren/board29-cross-development/45525-real-zahlen-und-funktionen-im-cc65-nutzen-zur-umsetzung/index3.html#post561059

Ciao,
Andreas

-- 
NEU: FreePhone 3-fach-Flat mit kostenlosem Smartphone!                                  
Jetzt informieren: http://mobile.1und1.de/?ac=OM.PW.PW003K20328T7073a
----------------------------------------------------------------------
To unsubscribe from the list send mail to majordomo@musoftware.de with
the string "unsubscribe cc65" in the body(!) of the mail.