发明授权
US07302553B2 Apparatus, system and method for quickly determining an oldest instruction in a non-moving instruction queue
有权
用于快速确定非移动指令队列中最旧指令的装置,系统和方法
- 专利标题: Apparatus, system and method for quickly determining an oldest instruction in a non-moving instruction queue
- 专利标题(中): 用于快速确定非移动指令队列中最旧指令的装置,系统和方法
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申请号: US10351556申请日: 2003-01-23
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公开(公告)号: US07302553B2公开(公告)日: 2007-11-27
- 发明人: Sam Gat-Shang Chu , Hung Qui Le , Dung Quoc Nguyen
- 申请人: Sam Gat-Shang Chu , Hung Qui Le , Dung Quoc Nguyen
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: US NY Armonk
- 代理商 Volel Emile; Casimer K. Salys
- 主分类号: G06F9/30
- IPC分类号: G06F9/30 ; G06F9/40 ; G06F15/00
摘要:
An apparatus, system and method for quickly determining an oldest instruction in a non-moving instruction queue of a processor are provided. Particularly, instructions are stored, one at a time at a clock cycle, in the non-moving queue. At every clock cycle, a present status of the instructions in the queue is recorded. Using the present status of the instructions in the queue in conjunction with previously recorded statuses of the instructions, the oldest instruction in the queue is determined. The status of the instructions in the queue includes whether or not the instruction has been issued for execution as well as whether or not it is known that the issued instruction has been accepted for execution.