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HD6417751 Datasheet, PDF (212/1105 Pages) Renesas Technology Corp – SuperH RISC engine | |||
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Table 7.1 Addressing Modes and Effective Addresses (cont)
Addressing Instruction
Mode
Format
PC-relative disp:12
Effective Address Calculation Method
Calculation
Formula
Effective address is PC+4 with 12-bit displacement PC + 4 + disp
disp added after being sign-extended and
à 2 â Branch-
multiplied by 2.
Target
PC
+
4
+
disp
(sign-extended)
Ã
PC + 4 + disp à 2
2
Rn
Effective address is sum of PC+4 and Rn.
PC + 4 + Rn
â Branch-
PC
Target
+
4
+
PC + 4 + Rn
Rn
Immediate #imm:8
8-bit immediate data imm of TST, AND, OR, or
â
XOR instruction is zero-extended.
#imm:8
8-bit immediate data imm of MOV, ADD, or
â
CMP/EQ instruction is sign-extended.
#imm:8
8-bit immediate data imm of TRAPA instruction is â
zero-extended and multiplied by 4.
Note:
For the addressing modes below that use a displacement (disp), the assembler descriptions
in this manual show the value before scaling (Ã1, Ã2, or Ã4) 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) ; Register indirect with displacement
@ (disp:8, GBR) ; GBR indirect with displacement
@ (disp:8, PC) ; PC-relative with displacement
disp:8, disp:12 ; PC-relative
Rev. 3.0, 04/02, page 172 of 1064
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