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Lecture 8 Shelving in Superscalar Processors (Part 1)

Lecture 8 Shelving in Superscalar Processors (Part 1). Advanced Computer Architecture. Direct Issue. The principle of shelving: Indirect Issue. Design Space of Shelving. Scope of Shelving. Layout of Shelving Buffers. Implementation of Shelving Buffer. Basic Variants of Shelving Buffers.

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Lecture 8 Shelving in Superscalar Processors (Part 1)

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  1. Lecture 8Shelving in Superscalar Processors (Part 1) Advanced Computer Architecture

  2. Direct Issue

  3. The principle of shelving: Indirect Issue

  4. Design Space of Shelving

  5. Scope of Shelving

  6. Layout of Shelving Buffers

  7. Implementation of Shelving Buffer

  8. Basic Variants of Shelving Buffers

  9. Using a Combined Buffer for Shelving, Renaming, and Reordering

  10. Number of Shelving Buffer Entries

  11. Number of read and write ports • how many instructions may be written into (input ports) or • read out from (output parts) a particular shelving buffer in a cycle • depend on individual, group, or central reservation stations

  12. Shelving: Operand Fetch Policy

  13. Operand Fetch Policies

  14. Operand fetch during instruction issue Reg. file

  15. Operand fetch during instruction dispatch Reg. file

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