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Atari coding BBS
| Re: x+y + offset in screen |
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Posted by: wiztom
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Mar,10.2009-23:13
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i counted cycles out of vague memory :P i know there is no barreshift, it takes 6+2n where n is shift count. and i meant better then precalc in memory, not cycles. with cycles it's ofcoz better to have table with x-offset and bit pattern.
consulting my ancient and dusted clocktable (might contain errors, 9pin matrix letters are fading)
lsl.w #5,d1 16 (6+5*2)
move.w d1,d4 4
lsl.w #2,d1 12 (6+2*2)
( better to use add.w d1,d1; add.w d1,d1; for total on 8)
add.w d1,d4 4
: 36 (or 32 with adds.)
versus multiplication which is on nicer side of cycles as 160 has only 2 bits set.
move.w d1,d4 4
mulu #160,d4 44 (38+2*2)
swap d4 8
: 56
or did i still miss something?
sleepy and fluish wiztom.
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Topic
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Posted by
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Date
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x+y + offset in screen
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gloky
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Mar,08.2009-17:19
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Re: x+y + offset in screen
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Randy
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Mar,09.2009-13:19
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Re: x+y + offset in screen
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nerve
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Mar,09.2009-14:03
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Re: x+y + offset in screen
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gloky
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Mar,09.2009-18:58
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Re: x+y + offset in screen
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gloky
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Mar,09.2009-19:04
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Re: x+y + offset in screen
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gloky
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Mar,09.2009-19:21
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Re: x+y + offset in screen
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wiztom
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Mar,09.2009-22:09
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Re: x+y + offset in screen
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nerve
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Mar,10.2009-13:22
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Re: x+y + offset in screen
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wiztom
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Mar,10.2009-23:13
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Re: x+y + offset in screen
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glokyy
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Mar,10.2009-22:58
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Re: x+y + offset in screen
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gloky
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Mar,10.2009-23:00
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Re: x+y + offset in screen
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h3rrv
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Mar,11.2009-11:08
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Re: x+y + offset in screen
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gloky
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Mar,11.2009-17:41
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Re: x+y + offset in screen
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nerve
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Mar,13.2009-12:44
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Re: x+y + offset in screen
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Defjam
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Mar,15.2009-23:23
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Re: x+y + offset in screen
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nerve
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Mar,16.2009-14:31
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Re: x+y + offset in screen
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gloky
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Mar,21.2009-14:49
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What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
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