HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 42

• Manufacturer Part Number: HD6417021
• Description: SuperH RISC engine
• Manufacturer: Hitachi Semiconductor

Table 2.8
Addressing
Mode
Indirect
register
addressing
with
displace-
ment
Indirect
indexed
register
addressing
Indirect
GBR
addressing
with
displace-
ment
Indirect
indexed
GBR
addressing
Addressing Modes and Effective Addresses (cont)
Mnemonic
Expression
@(disp:4,
Rn)
@(R0, Rn)
@(disp:8,
GBR)
@(R0,
GBR)
Effective Addresses Calculation
The effective address is Rn plus a 4-bit displacement
(disp). disp is zero-extended, and remains the same
for a byte operation, is doubled for a word operation,
and is quadrupled for a long word operation.
The effective address is the Rn value plus R0.
The effective address is the GBR value plus an 8-bit
displacement (disp). The value of disp is zero-
extended, and remains the same for a byte
operation, is doubled for a word operation, and is
quadrupled for a long word operation.
The effective address is the GBR value plus the R0.
(zero-extended)
(zero-extended)
GBR
1/2/4
GBR
1/2/4
disp
disp
Rn
R0
R0
Rn
+
+
+
+
Rn + disp
+ disp
GBR + R0
Rn + R0
GBR
1/2/4
1/2/4
Equation
Byte: Rn +
disp
Word: Rn +
disp
Long word:
Rn + disp
Rn + R0
Byte: GBR +
disp
Word: GBR +
disp
Long word:
GBR + disp
4
GBR + R0
HITACHI 23
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