Re: A86: Super fast GridPutSprite
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Re: A86: Super fast GridPutSprite
Yeah, I know, but I was bored. ;-)
This routine, with interrupts disabled, could draw between 18000-19000
sprites a second. I can't see a use for anything that fast, but the faster
you do graphics the more time you have for other stuff.
P.S. Do you have any super-fast non-aligned sprite routines you'd like to
share?
-----Original Message-----
From: Jimmy Mårdell <yarin@acc.umu.se>
To: assembly-86@lists.ticalc.org <assembly-86@lists.ticalc.org>
Date: Monday, November 02, 1998 3:24 PM
Subject: Re: A86: Super fast GridPutSprite
>
>At 23:05 1998-11-01 -0600, you wrote:
>>
>>Out of curiosity, I decided to unroll the GridPutSprite routine, and the
>>results are great. Almost a two times speed increase. The time goes from
>>567 t-states down to 289. The byte size increases from 28 to 44. Not bad
>>at all. An added bonus is that you can now pass in the address to draw it
>>to, making it great for greyscale or virtual screens (or both!). Since
it's
>>twice the speed, you could draw to a two greyscale planes in the time it
>>took to draw to a single screen!
>
>Aligned sprite routines aren't very much fun to optimize since I don't
>see how you could ever make such a routine too slow... even the slowest
>routines I've seen is still much faster than most nonaligned
>sprites routines; that is, more than 1000 sprites/sec (and the
>fastest more than 10000 sprites/sec, I'm sure).
>
>//Jimmy Mårdell
>
>E-mail: yarin@acc.umu.se
>Homepage: http://www.acc.umu.se/~yarin/
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