Addressing Instruction
Mode
Format
Effective Address Calculation Method
Calculation Formula
Register
@(disp:4, Effective address is register Rn contents with Byte: Rn + disp
indirect with
displacement
Rn)
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.
Word: Rn + disp × 2
Longword: Rn + disp ×
4
Rn
Rn
+ disp × 1/2/4
disp
(zero-extended)
+
×
1/2/4
Indexed
register indirect
@(R0, Rn) Effective address is sum of register Rn and
R0 contents.
Rn + R0
Rn
+
Rn + R0
R0
GBR indirect @(disp:8, Effective address is register GBR contents
Byte: GBR + disp
with
displacement
GBR)
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.
Word: GBR + disp × 2
Longword: GBR + disp
× 4
GBR
GBR
+ disp × 1/2/4
disp
(zero-extended)
+
×
1/2/4
Indexed GBR @(R0,
indirect GBR)
Effective address is sum of register GBR and GBR + R0
R0 contents.
GBR
+
GBR + R0
R0
Rev. 5.00, 09/03, page 29 of 760
RENESAS [ RENESAS TECHNOLOGY CORP ]
