| 摘要 |
A latest register update buffer which stores latest register update data is allocated and prepared every general register for storing source data. A latest register update processing unit stores a value in the general register as latest register update data into the latest register update buffer when a register update instruction is not speculatively executed, and overwrites a result of the speculative execution when the instruction is speculatively executed. Upon instruction decoding, a matching processing unit reads out the latest register update data from the latest register update allocation buffer and stores it into a data area in a reservation station.
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