"Mode", "Effective Address", "Indexing"
"[Rn]", "Rn", "None"
"[Rn, ± Rm]{!}", "Rn ± Rm", "Pre-Indexed"
"[Rn, ± Rm, <s-op> #<expr>]{!}", "Rn ± (Rm <s-op> #<expr>)", "Pre-Indexed"
"[Rn, ± #<expr>]{!}", "Rn ± #<expr>", "Pre-Indexed"
"[Rn], ± Rm", "Rn", "Post-Indexed"
"[Rn], ± Rm, <s-op> #<expr>", "Rn", "Post-Indexed"
"[Rn], ± #<expr>", "Rn", "Post-Indexed"