| 摘要 |
PROBLEM TO BE SOLVED: To predictively perform data acquisition of a load instruction to speculatively carry out subsequent instructions, to reduce a data dependence relation period of the load instruction and a store instruction and to improve processor performance by supplying data acquired by referring to a specific table. SOLUTION: A load index store table(LIST) 207 is accessed by using a load instruction address that is shown by a program counter(PC) 600 on an IF stage. A store index value table(SIVT) 307 is accessed by using a store instruction address that is obtained from the LIST 207. Data that is acquired from the SIVT 307 is supplied to succeeding instructions as an operand and the succeeding instructions are speculatively carried out. A comparator 500 compares data that is acquired from data memory 800 with the data acquired from the SIVT 307 on an MA stage of the load instruction. If both coincide, speculative execution is a success.
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