| 摘要 |
PURPOSE:To reduce the quantity of memory, by using a 1-byte instruction for the branch instruction to be given to the first of the loop processing executed when re-execution condidtions come into existence in the course of judgement of re-execution conditions performed at the final stage of the loop processing. CONSTITUTION:A state which pops up a stack pointer 20 is controlled, and a program counter 21 at the time of begining of D0 group consisting of a loop processing in a program of a microprocessor is pushed down to a stacker. An address program indicated by the stack pointer 20 when the re-execution conditions of the loop come into existence is settled in the program counter 21. Moreover, when the D0 group consisting of a loop processing is branched to the outside of the extent, the stack pointer 20 is popped up by means of a popup control, 1-byte instruction is used for the branch instruction at the time when the re-execution conditions of the D0 group comes to exist. |
