发明申请
US20100058035A1 System and Method for Double-Issue Instructions Using a Dependency Matrix
失效
使用依赖矩阵的双重问题指令的系统和方法
- 专利标题: System and Method for Double-Issue Instructions Using a Dependency Matrix
- 专利标题(中): 使用依赖矩阵的双重问题指令的系统和方法
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申请号: US12199853申请日: 2008-08-28
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公开(公告)号: US20100058035A1公开(公告)日: 2010-03-04
- 发明人: Christopher M. Abernathy , Mary D. Brown , Todd A. Venton
- 申请人: Christopher M. Abernathy , Mary D. Brown , Todd A. Venton
- 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
- 主分类号: G06F9/38
- IPC分类号: G06F9/38
摘要:
A method for double-issue complex instructions 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 cancels the second portion issue.
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