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SH7713 数据表(PDF) 86 Page - Renesas Technology Corp |
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SH7713 数据表(HTML) 86 Page - Renesas Technology Corp |
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86 / 904 page ![]() Section 2 CPU Rev.1.50 Aug. 30, 2006 Page 46 of 860 REJ09B0288-0150 Addressing Mode Instruction Format Effective Address Calculation Method Calculation Formula Register indirect with pre-decrement @–Rn Effective address is register Rn contents, decremented by a constant beforehand: 1 for a byte operand, 2 for a word operand, 4 for a longword operand. Rn Rn - 1/2/4 1/2/4 - Rn - 1/2/4 Byte: Rn – 1 → Rn Word: Rn – 2 → Rn Longword: Rn – 4 → Rn (Instruction executed with Rn after calculation) 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 Rn + disp × 1/2/4 1/2/4 + disp (zero-extended) × 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 GBR + disp × 1/2/4 1/2/4 + disp (Zero-extended) × Byte: GBR + disp Word: GBR + disp × 2 Longword: GBR + disp × 4 |
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