| 摘要 |
PROBLEM TO BE SOLVED: To provide a data processor that implements a pipeline process and that can be guaranteed to operate normally even if a block to be repeatedly given repeat instructions is small in size. SOLUTION: When a disp determining part 664 determines that a displacement value is not more than "2", a control signal generating part 665 sends an "H" (active state) instruction fetch stop signal 681 to an instruction fetch request generating part 652 upon receiving the determination result. On receiving the "H" instruction fetch stop signal 681, the instruction fetch request generating part 652 starts instruction fetch stop control to temporarily stop instruction fetches. Thereafter, a state in which instruction fetches are stopped is maintained until an "H" (active state) instruction fetch stop cancellation signal 682 or an "H" jump signal 684 is received. COPYRIGHT: (C)2006,JPO&NCIPI
|
