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9.33.2.3 Addressing Modes

as understands the following addressing modes for the SH. Rn in the following refers to any of the numbered registers, but not the control registers.

Rn
Register direct
@Rn
Register indirect
@-Rn
Register indirect with pre-decrement
@Rn+
Register indirect with post-increment
@(disp, Rn)
Register indirect with displacement
@(R0, Rn)
Register indexed
@(disp, GBR)
GBR offset
@(R0, GBR)
GBR indexed
addr
@(disp, PC)
PC relative address (for branch or for addressing memory). The as implementation allows you to use the simpler form addr anywhere a PC relative address is called for; the alternate form is supported for compatibility with other assemblers.
#imm
Immediate data