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Atari coding BBS
| optimize me! |
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Posted by: PeP
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Mar,11.2010-00:55
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Hi,
I have an inner loop which looks like this:
loop:
move.b (a3)+,d7
move.w d7,6(sp)
move.l 4(a2,d7.l*8),a0
move.l 0(a2,d7.l*8),a2
jsr (a0)
dbra d2,loop
I suppose I could re-shuffle my lookup table, and change it to something like this, but I don't know if it's faster:
loop:
move.b (a5)+,d7
move.w d7,6(sp)
lea (a3,d7.l*8), a4
movem.l (a4),a2-a3
jsr (a2)
dbra d2,loop
Any ideas?
Notes:
- target system is 020-060
- unrolling is probably no option
- I have to put d7 on the stack the way I do (calling a C function)
- d0-d1/a0-a1 might get clobbered by the subroutine I call (C)
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Topic
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Posted by
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Date
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optimize me!
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PeP
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Mar,11.2010-00:55
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Re: optimize me!
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PeP
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Mar,11.2010-01:28
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Re: optimize me!
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mikro
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Mar,11.2010-10:09
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Re: optimize me!
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sqward
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Mar,11.2010-11:58
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Re: optimize me!
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PeP
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Mar,11.2010-14:32
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Re: optimize me!
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PeP
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Mar,11.2010-14:31
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Re: optimize me!
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PeP
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Mar,11.2010-14:44
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Re: optimize me!
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sqward
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Mar,11.2010-15:50
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Re: optimize me!
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PeP
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Mar,11.2010-16:05
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Re: optimize me!
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Alien / ST-CNX
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Apr,15.2010-04:48
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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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