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Atari coding BBS
| Re: sys calls vs direct calls |
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Posted by: evil
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Jun,17.2010-22:00
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The second example any time, the OS call for setting a palette has an immense overhead in CPU-cycles compared to the other.
You can optimize a little by moving directly from memory and by using word sign extend, eg;
movem.l palette,d0-d7
movem.l d0-d7,$ffff8240.w
--
Anders Eriksson
ae@dhs.nu
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