JPS6491238A - Arithmetic control system - Google Patents

Abstract

PURPOSE:To realize the arithmetic control with excellent reliability and maintenance properties by preparing a control processing part which performs the repeating actions as a subroutine secondary program and therefore facilitating a programming job causing a repeated process even with the use of low-level language. CONSTITUTION:The repeating start input 1 is called out so that a control variable which limits the repeating frequency is initialized in a process 10. In a process 11 the conditions to end the repeating actions, the increase of the control variable as well as a certain address of an instruction which shifts the control when the repeating arithmetic is through are preserved. In a process 31 the jumping destination address is set after the repeating operation as a return address when said control variable satisfies the end conditions in a process 20. When the control variable does not satisfy the end conditions, each return address is designated in a process 32 so that a return address is set at a start part. At the same time, an increase amount is added to the control variable in a process 40 and returned to each set return address. Thus it is possible to avoid the increase of instruction steps of a low-level language.