13.1 Purpose of This Chapter

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13.1 Purpose of This Chapter

This chapter documents the AlphaPipeline implementation: the internal execution conveyor that moves decoded instructions ("grains") from fetch through architectural retirement.

 

This chapter answers: how instructions flow through the pipeline, how stalls/flushes/serialization are enforced, where architectural state becomes visible, and how correctness is guaranteed in the presence of speculation.

 

This chapter does not define instruction semantics — those live in grains and execution boxes. It does not define the conceptual pipeline model — that is Chapter 3. This chapter documents the implementation mechanics.

 

Implementation: AlphaPipeline.h (2,088 lines, fully inline header) and PipeLineSlot.h (409 lines).

 

See Also: Chapter 3 – Pipeline Architecture (conceptual model); Chapter 12 – AlphaCPU Core (pipeline owner).