+- Mario Kart Wii Gecko Codes, Cheats, & Hacks (https://mariokartwii.com)
+-- Forum: Hacks/Modding (https://mariokartwii.com/forumdisplay.php?fid=14)
+--- Forum: Coding & Hacking General Discussion (https://mariokartwii.com/forumdisplay.php?fid=23)
+--- Thread: Fibonacci in PowerPC ASM (/showthread.php?tid=957)
Fibonacci in PowerPC ASM - Vega - 11-23-2018
I was asked by a random person on Discord if I could make a Fibonacci sequence on PPC ASM.
Example:
x + y = z
0 + 1 = 1
1 + 1 = 2
1 + 2 = 3
2 + 3 = 5
etc etc
He wanted the equation to loop and repeat until X equals 255 then the loop will start from the very beginning again. Anyway here's a quick fibonacci ASM sequence if anybody cares... Ofc, modify this according to store/load to/from memory addresses for use in Cheat Codes...
first_label:
li r16, 0x0 #Set X value
li r17, 0x1 #Set Y Value
second_label:
add r18, r16, r17 #This is the instruction for X+Y=Z. Register 18 is the Z value
mr r16, r17 #Copy Y's values over to X
mr r17, r18 #Copy Z's value over to Y
cmplwi r16, 0xFF #Compare X's value to 255
blt+ second_label #If less than (more likely to occur) continue the Fibonacci sequence by jumping to back to second_label
b first_label #Once X equals 255, reset the entire sequence. Jump to first_label
Raw ASM:
3A000000 3A200001
7E508A14 7E308B78
7E519378 281000FF
4180FFF0 4BFFFFE4