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Table 7.1
Addressing Modes and Effective Addresses (cont)
Addressing
Instruction
Mode
Format
PC-relative
disp:12
Rn
Immediate
#imm:8
#imm:8
#imm:8
Note: For the addressing modes below that use a displacement (disp), the assembler descriptions
in this manual show the value before scaling (×1, ×2, or ×4) is performed according to the
operand size. This is done to clarify the operation of the chip. Refer to the relevant
assembler notation rules for the actual assembler descriptions.
@ (disp:4, Rn)
@ (disp:8, GBR) ; GBR indirect with displacement
@ (disp:8, PC)
disp:8, disp:12
Rev. 6.0, 07/02, page 178 of 986
Effective Address Calculation Method
Effective address is PC+4 with 12-bit displacement
disp added after being sign-extended and
multiplied by 2.
PC
4
disp
(sign-extended)
2
Effective address is sum of PC+4 and Rn.
PC
4
Rn
8-bit immediate data imm of TST, AND, OR, or
XOR instruction is zero-extended.
8-bit immediate data imm of MOV, ADD, or
CMP/EQ instruction is sign-extended.
8-bit immediate data imm of TRAPA instruction is
zero-extended and multiplied by 4.
; Register indirect with displacement
; PC-relative with displacement
; PC-relative
+
PC + 4 + disp × 2
+
×
+
+
PC + 4 + Rn
Calculation
Formula
PC + 4 + disp
× 2 → Branch-
Target
PC + 4 + Rn
→ Branch-
Target
—
—
—
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