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Marking in history table instructions slowable/delayable for subsequent executions when result is not used immediately
Marking in history table instructions slowable/delayable for subsequent executions when result is not used immediately
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机译:当不立即使用结果时,历史记录表指令中的标记可减慢/延迟用于后续执行
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摘要
After an instruction loads data into a register at a first time, the register is monitored to see if it is read in a next clock cycle. When the data is not read in the next clock cycle, the instruction is classified as a slowable instruction. An instruction address associated with the instruction is used to update a history table. The history table stores information to indicate if an instruction is a slowable instruction or a non-slowable instruction. When the instruction address of the instruction is encountered at a second time, the history table is used to determine if the instruction is slowable or non-slowable.
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