System and method for double-issue instructions using a dependency matrix

System and method for double-issue instructions using a dependency matrix

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 meth...

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Hauptverfasser: Abernathy, Christopher M, Brown, Mary D, Venton, Todd A
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Sprache:eng
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creator Abernathy, Christopher M
Brown, Mary D
Venton, Todd A
description 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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title System and method for double-issue instructions using a dependency matrix
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