x86's doIbit picks between folding the immediate into the block and
loading it from micro memory; arm64 only ever folded.
Scarface (SLUS-21111), the game the gamefix is listed for, writes a
per-object transform into VU1 micro memory as I immediates. Under the
recompiler its trees and much of the geometry around them took whichever
object's transform compiled first. The interpreter re-reads the word on
every dispatch and was unaffected.