Motorola MPC823e Reference Manual page 1240

MPC823e Instruction Set—lswx
B-82
Under certain conditions (for example, segment boundary
crossing) the data alignment exception handler may be invoked.
Note that, in some implementations, this instruction is likely to
have a greater latency and take longer to execute, perhaps
much longer, than a sequence of individual load or store
instructions that produce the same results.
Other registers altered:
None
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