Invention Grant
US08135942B2 System and method for double-issue instructions using a dependency matrix and a side issue queue
失效
使用依赖关系矩阵和侧面问题队列的双重指令的系统和方法
- Patent Title: System and method for double-issue instructions using a dependency matrix and a side issue queue
- Patent Title (中): 使用依赖关系矩阵和侧面问题队列的双重指令的系统和方法
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Application No.: US12199971Application Date: 2008-08-28
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Publication No.: US08135942B2Publication Date: 2012-03-13
- Inventor: Christopher M. Abernathy , Mary D. Brown , Todd A. Venton , John B. Griswell, Jr.
- Applicant: Christopher M. Abernathy , Mary D. Brown , Todd A. Venton , John B. Griswell, Jr.
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corpration
- Current Assignee: International Business Machines Corpration
- Current Assignee Address: US NY Armonk
- Agency: The Caldwell Firm, LLC
- Agent Patrick E. Caldwell, Esq.
- Main IPC: G06F9/50
- IPC: G06F9/50 ; G06F9/52 ; G06F9/312
Abstract:
A method receives a complex instruction comprising a first portion and a second portion. The method sets a single issue queue slot and allocates an execution unit for the complex instruction, and identifies dependencies in the first and second portions. The method sets a dependency matrix slot and a consumers table slot for the first and section portion. In the event the first portion dependencies have been satisfied, the method issues the first portion and then issues the second portion from the single issue queue slot. In the event the second portion dependencies have not been satisfied, the method places the second portion into a side issue queue. The method issues the second portion when the side issue queue indicates that the second portion is eligible for issue.
Public/Granted literature
- US20100058033A1 System and Method for Double-Issue Instructions Using a Dependency Matrix and a Side Issue Queue Public/Granted day:2010-03-04
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