home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
EnigmA Amiga Run 1997 May
/
EnigmA AMIGA RUN 18 (1997)(G.R. Edizioni)(IT)[!][issue 1997-05][EAR-CD II].iso
/
programs
/
graphics
/
artpro_install
/
renderlib
/
doc
/
cpu
< prev
next >
Wrap
Text File
|
1997-03-02
|
2KB
|
66 lines
render.library
--------------
©1996 by Captain Bifat / TEK neoscientists
CPU adaption
render.library is shipped in three versions: 68020, 68040, and
68060. if your system is supplied with an 68030 CPU, you can use
both the 68020 and the 68040 versions. the latter one requires a
FPU, though.
the following table informs you about what version is the right
one for your system's processor configuration:
CPU type: 68020 68030 68030/68882 68040 68060
------------------------------------------------------------------
render.library_060 -/- -/- - + ++
render.library_040 -/- -/- ++¹ ++ +
render.library_020 +² ++² ++ + --
-/- won't work
-- terrible combination
- bad combination
+ good combination
++ very good combination
¹ slower but accuracy is better
² bug removed since v18.0: prior to this version, quantization
did not work at all without a FPU
special annotations
> 68060
there was a lot of work to be spent for the 060 version. hence
this version is most optimized in the render.library package. the
code benefits massively from large caches, superscalarity, quick
integer multiplication, even from branch prediction and other
features.
> 68040
the 040 is similar to the 060 version. complex addressing modes
have been used whereever it helped to gain register-efficiency.
also try the 060 version if your 68040 board has got poor memory
performance.
> 68030
there was no need for a 030 version, for 68030 specificity is well
provided with both the 020 and 040 versions. keep in mind that the
040 version requires a FPU. the 68882 coprocessor might be slower
than appropriate 64 bit integer arithmetics, but accuracy is
slightly better.
> 68020
the 68020 is an old-fashioned CPU - no maths, poor caches, no
special features. there was no particular need to optimize for
this processor. the 68020 version is actually optimized for the MC
68030.
> 68000
there never was and will never be a version for this CPU. i'm not
Jesus.