| 摘要 |
PURPOSE:To attain the desired conditional branch to facilitate easy production of a program and to execute the program at a high speed, by sensing simultaneously plural conditional flags and performing the logical operation among these sensed flags. CONSTITUTION:When a conditional branch instruction is executed, a flag selection pattern read out according to the address set to an address register 1 is sent to a multiplexer 3. Then plural conditional flags are sent to arithmetic circuits 4-6. These circuits 4-6 execute the logical operation among plural conditional flags and sends them to a multiplexer 7. A conditional branch circuit 8 executes the conditional branch based on the logical arithmetic signals among conditional flags sent from the multiplexer 7. Thus plural conditional flags are sensed at a time and the conditional branch is possible through the logical operation.
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