Invention Grant
- Patent Title: System and method for double-issue instructions using a dependency matrix
- Patent Title (中): 使用依赖矩阵的双重指令的系统和方法
-
Application No.: US12199853Application Date: 2008-08-28
-
Publication No.: US08239661B2Publication Date: 2012-08-07
- Inventor: Christopher M. Abernathy , Mary D. Brown , Todd A. Venton
- Applicant: Christopher M. Abernathy , Mary D. Brown , Todd A. Venton
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: The Caldwell Firm, LLC
- Agent Patrick E. Caldwell, Esq.
- Main IPC: G06F15/00
- IPC: G06F15/00 ; G06F9/30 ; G06F9/40 ; G06F7/38 ; G06F9/00 ; G06F9/44
Abstract:
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.
Public/Granted literature
- US20100058035A1 System and Method for Double-Issue Instructions Using a Dependency Matrix Public/Granted day:2010-03-04
Information query
