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Section 2 CPU
Rev. 4.00 Sep. 14, 2005 Page 49 of 982
REJ09B0023-0400
Addressing
Mode
Instruction
Format
Effective Address Calculation Method Calculation Formula
Register
indirect with
displacement
@(disp:4, Rn) Effective address is register Rn contents with
4-bit displacement disp added. After disp is
zero-extended, it is multiplied by 1 (byte),
2 (word), or 4 (longword), according to the
operand size.
Rn
1/2/4
+
×
disp
(zero-extended)
Rn
+ disp × 1/2/4
Byte: Rn + disp
Word: Rn + disp × 2
Longword: Rn + disp × 4
Indexed
register indirect
@(R0, Rn) Effective address is sum of register Rn and
R0 contents.
Rn
R0
Rn + R0
+
Rn + R0
GBR
indirect with
displacement
@(disp:8, GBR) Effective address is register GBR contents
with 8-bit displacement disp added.
After disp is zero-extended, it is multiplied by
1 (byte), 2 (word), or 4 (longword), according
to the operand size.
GBR
1/2/4
+
×
disp
(zero-extended)
GBR
+ disp × 1/2/4
Byte: GBR + disp
Word: GBR + disp × 2
Longword: GBR + disp × 4
Indexed GBR
indirect
@(R0, GBR) Effective address is sum of register GBR and
R0 contents.
GBR
R0
GBR + R0
+
GBR + R0