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Rev. 1.0, 07/01, page 31 of 372
Table 2-12 Effective Address Calculation (1)
No
1
r
op
31
0
23
2
3 Register indirect with displacement
@(d:16,ERn) or @(d:24,ERn)
4
r
op
disp
r
op
rm
op
rn
31
0
0
r
op
23
0
31
0
disp
31
0
31
0
23
0
23
0
Addressing Mode and Instruction Format Effective Address Calculation Effective Address (EA)
Register direct(Rn)
General register contents
General register contents
General register contents
General register contents
Sign extension
Register indirect(@ERn)
Register indirect with post-increment or
pre-decrement
•Register indirect with post-increment @ERn+
•Register indirect with pre-decrement @-ERn
1, 2, or 4
1, 2, or 4
Operand is general register contents.
The value to be added or subtracted is 1 when the
operand is byte size, 2 for word size, and 4 for
longword size.