| 摘要 |
PURPOSE:To selectively execute different instructions according to the authenticity of conditions of conditional judgement instruction without executing branch instruction by providing a means that suppresses the execution of an instruction following the conditional judgement instruction according to the authenticity of the conditions. CONSTITUTION:A delay circuit 5 connected to two outputs 400 and 410 of an instruction decoder 4 is provided. Clock pulses are supplied from a reference clock generator 1 to the circuit 5, and inputted instruction is held for 1 instruction time and then an instruction prohibition signal is outputted. Accordingly, an instruction code outputted from output 410 of the decoder 4 is returned to the decoder 4 as an instruction prohibition signal through a signal line 500 after 2 instruction execution times. When the instruction is a conditional judgement instruction and the condition is true, a true judgement control signal 400 is outputted, and when the condition is false, a false judgement control signal 410 is outputted.
|
