| 摘要 |
PURPOSE:To save an address calculation time or hardware when accessing specific address areas continuously, by entering data, showing the continuous access areas, in a load address instruction. CONSTITUTION:A base register 4 wherein offset base addresses are set, adding means 6 and 7, and a comparing means 8 are provided. When the offset base addresses are set in the base register 4, the sum of size information 5 on the size of an area to be accessed by using the base register 4 and an offset value is calculated by the adding means 7 and the resulting sum is compared 8 with segment range information 3 on a segment range to make sure that the area to be accessed by using the base register 4 is in the segment. |
