Motorola MPC823e Reference Manual page 1221

MPC823e Instruction Set—icbi
For faster processing, many implementations will not compare
the entire EA (rA|0 + rB) with the tag in the instruction cache.
Instead, they will use the bits in the EA to locate the set that the
block is in, and invalidate all blocks in that set.
Other registers altered:
None
POWERPC ARCHITECTURE SUPERVISOR OPTIONAL FORM
LEVEL LEVEL
VEA X
MOTOROLA MPC823e REFERENCE MANUAL B-63