lis r5, 0x806D
ori r5, r5, 0xFC80 // hid
lhz r5, 0(r5)
xor r14, r14, r14 // counter to check all directions
lis r27, 0x80E6
ori r27, r27, 0x17A8
lis r30, 0x9080
ori r30, r30, 0x0
lfs f17, 0(r30) // load a float from memory to change speed
lfs f18, 0(r27)
andi. r9, r5, 1
cmpwi r9, 1
beq f_sub
right:
addi r14, r14, 1
andi. r9, r5, 2
cmpwi r9, 2
beq f_add
down:
addi r14, r14, 1
addi r27, r27, 8
lfs f18, 0(r27)
andi. r9, r5, 4
cmpwi r9, 4
beq f_add
up:
addi r14, r14, 1
andi. r9, r5, 8
cmpwi r9, 8
bne end
f_sub:
fsub f18, f18, f17
b f_write
f_add:
fadd f18, f18, f17
f_write:
stfs f18, 0(r27)
b check_press
end:
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check_press:
cmpwi r14, 0
beq right
cmpwi r14, 1
beq down
cmpwi r14, 2
beq up
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