XOR as a toggle
The third mask operator: XOR gives 1 where the inputs differ. Against a constant, that means the mask's ones flip the corresponding input bits — on becomes off, off becomes on — while the zeros pass through. The immediate form is xori. Here's the low byte being inverted:
xori v0, a0, 0xff # flip bits 0-7, keep the rest
jr ra
nop
In C: x ^ 0xff. Run it twice and you'd get the original back — XOR undoes itself, which is exactly why game code loves it for state that alternates: blinking visibility, ping-pong directions, parity counters.
That completes the trio, and it's worth pinning the three side by side, because reading them at a glance is the skill:
andi — the mask's ones are the bits kept.ori — the ones are the bits forced on.xori — the ones are the bits flipped.
Same encoding, same zero-extended immediate, three different verbs. When you're decoding, the mnemonic picks the C operator and the immediate rides across unchanged — there's genuinely nothing else to derive.
Your task
Write func_800f020c to reproduce the target assembly.