| 摘要 |
PROBLEM TO BE SOLVED: To provide an information processor capable of surely executing exceptional processing for exceptional information generated by an instruction executed speculatively without depending upon a register resource in a CPU and reducing the throughput of the CPU by using comparatively inexpensive constitution. SOLUTION: In the information processor, a CPU 10 constituting an arithmetic processing unit is provided with an exception detector 11 constituting an exception detecting means, an exception canceling device 12 or a pass storing register R3 constituting an exceptional information invalidating means, an exception processor 13 constituting an exception processing means, and an exception address control part 14 constituted of an exceptional information start address register R1 and an exceptional information stack pointer register R2 and an external memory 20 constituting an external storage device is provided with an exceptional information storing device 21 constituting an exceptional information storing means.
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