The Optimization Compilation

[calc84maniac]

also, i think 'number less than 256' /256 might be more efficient than just 0

Actually no, both of those are 3 bytes. But 'number less than 256' and 0 is only 2 bytes and it does the same thing

[epic7]

I'm going to see how many bytes I can save now.

[kindermoumoute]

Currently, is this tutorial efficient yet ?

[squidgetx]

Umm it's a little outdated atm, though much of it is still OK.
Axe's peephole optimizer removes the need for things like

Code: [Select]

If A+1->A instead of

Code: [Select]

A+1->A
If AAlso DispGraph is just as fast as DispGraph^r
I'm planning to sit down sometime in the near future and update this a bit

[squidgetx]

Done.

For those of you who don't want to scan through, I've made a list of most of the new additions/changes

• The HL section is quasi-obsolete
• DispGraph^r is no longer faster than DispGraph
• The !If A xor EXP structure is now better than the !If A - EXP unless you are using an optimized addition/subrtraction
• When storing 0 to a 1 byte variable, and 0-> is better than 0->
• I linked to Runer's index thread as well as stole the math opts table from him to be included here.
• Otherwise cleaned up and reformatted

[Builderboy]

the 'and 0->' code only works if HL is less than 256

[squidgetx]

Hm, I thought that it doesn't matter because you're only storing the least significant byte into wherever you're storing?

Also I need to add stuff on the Select() command...Maybe later Edit: hm, and I want to discuss the structure of loops utilizing addition in place of mulitplication...So much to do so little time

[Darl181]

Is there a way to make the inData() trick work with pointers and/or 16-bit numbers?  If used erroneously will it mess up to the point of a crash?

Edit: or is there a different way now with the newer versions of Axe?

[squidgetx]

Well it really depends on the circumstances...
As far as 16bit numbers, I don't know for sure but I think not...
And what do you mean 'with pointers'?

Wow I'm so helpful. Haha but can you clarify a little bit?

[Darl181]

Something like...
If inData({L1},Data(2,4,6,8,0))
..or maybe even...
If inData({L1}+1,Data(3,5,7,9,0))

[squidgetx]

That should work (sorry for the late reply lol)

No harm in trying these things out yourself btw haha

[Darl181]

I try, but more often than not test programs work differently for me and half the time I try random ambitious code weird stuff happens