Bug #85550 was marked as duplicate of this bug, but it's a different issue; it's about illegal instructions on G4s which _have_ altivec support, but lacks support for some additional opcodes supported by the G5
Bug #85550 was marked as duplicate of this bug, but it's a different issue; it's about illegal instructions on G4s which _have_ altivec support, but lacks support for some additional opcodes supported by the G5