| 单词 | index register |
| 释义 | > as lemmasindex register index register n. Computing a register whose contents may be added to or subtracted from the address portion of an instruction before the instruction is executed and then (by means of a second instruction) increased or decreased by a prescribed amount, so enabling the first instruction to be used for a series of identical operations on a series of different operands. ΘΚΠ society > computing and information technology > hardware > [noun] > primary storage or main memory > register register1946 program register1948 shift register1950 index register1955 control register1956 1955 R. K. Richards Arithm. Operations in Digital Computers xi. 348 In these machines..each instruction specifies an index register as well as an operation and an address. For each operation, the number stored in the indicated index register is automatically added to the address, and the sum is then the actual address which is used. 1957 D. D. McCracken Digital Computer Programming viii. 106 All we really want from the indexing is the sum of the index register contents and the indicated address. 1970 O. Dopping Computers & Data Processing vi. 101 In most modern computers address modification and counting is facilitated by index registers. 1970 T. E. Hull & D. D. F. Day Computers & Probl. Solving 197/2 Index registers have a second important use in what is called automatic address modification or indexing. This occurs when the address of an instruction is modified, just before the instruction is executed, by having the content of an index register added to it. < as lemmas |
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