| 摘要 |
PURPOSE:To compare an arbitrary value with values of plural registers with execution of one comparison operation instruction by providing comparator registers and a status register, on which comparison operation results of all comparator registers reflect, as general registers. CONSTITUTION:After the instruction which compares a value to be compared with values of comparator registers 105-108 to set to an instruction storage register 101, this instruction is decoded by an instruction decoder 102 to output a micro instruction address signal 151, and micro instructions for comparison operation in a micro instruction storage circuit 103 are started. The value to be compared is inputted to comparator registers 105-108 by a micro instruction 152 outputted from the micro instruction storage circuit 103 to perform the operation. Operation results are inputted to a status register 109 by comparison result signals 150-160 to recognize the comparator register whose value is equal to arbitrary data. Thus, the arbitrary value is compared with values of plural general registers at as time with one instruction. |
