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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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SH7708 数据表(PDF) 42 Page - Renesas Technology Corp |
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SH7708 数据表(HTML) 42 Page - Renesas Technology Corp |
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42 / 633 page  24 Table 2.2 Addressing Modes and Effective Addresses (cont) Addressing Mode Instruction Format Effective Address Calculation Method Calculation Formula PC-relative with displacement @(disp:8, PC) Effective address is register PC contents with 8-bit displacement disp added. After disp is zero-extended, it is multiplied by 2 (word), or 4 (longword), according to the operand size. With a longword operand, the lower 2 bits of PC are masked. PC H'FFFFFFFC + 2/4 x & (for longword) disp (zero-extended) PC + disp × 2 or PC&H'FFFFFFFC + disp × 4 Word: PC + disp × 2 Longword: PC & H'FFFF FFFC + disp × 4 PC-relative disp:8 Effective address is register PC contents with 8-bit displacement disp added after being sign-extended and multiplied by 2. PC 2 + × disp (sign-extended) PC + disp × 2 PC + disp × 2 disp:12 Effective address is register PC contents with 12-bit displacement disp added after being sign-extended and multiplied by 2. PC 2 + × disp (sign-extended) PC + disp × 2 PC + disp × 2 |
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