Invention Grant
US06779122B2 Method and apparatus for executing a long latency instruction to delay the restarting of an instruction fetch unit
有权
用于执行长延迟指令以延迟重新启动指令获取单元的方法和装置
- Patent Title: Method and apparatus for executing a long latency instruction to delay the restarting of an instruction fetch unit
- Patent Title (中): 用于执行长延迟指令以延迟重新启动指令获取单元的方法和装置
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Application No.: US09748612Application Date: 2000-12-26
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Publication No.: US06779122B2Publication Date: 2004-08-17
- Inventor: Varghese George , Tim W. Chan
- Applicant: Varghese George , Tim W. Chan
- Main IPC: G06F130
- IPC: G06F130

Abstract:
A micro-code sequence to reduce the rate of change of current required by a processor coming out of a sleep mode when the processor clock is resumed. After stopping the instruction fetch unit, an instruction with a long latency, or execution time, can be initiated by the micro-code before the processor clock is stopped to enter a sleep mode. When the sleep mode is exited by resuming the processor clock, the instruction with the long execution time is completed before restarting the instruction fetch unit. This prevents a portion of the processor circuitry from resuming operation immediately when the clock is resumed, which also delays some of the current demands made by that portion of the circuitry. This creates a more gradual increase in the current required by the processor when exiting a sleep mode.
Public/Granted literature
- US20020091912A1 Microcode-assisted control of current surges in microprocessors Public/Granted day:2002-07-11
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