Store buffer

Storage for pending writes, usually with their memory addresses, data and status. A younger load instruction must account for older overlapping buffered store instructions, often by store-to-load forwarding.

An age-ordered structure tracking store instructions, their memory addresses and data, and their eligibility to become visible. An implementation may distinguish a speculative store queue from the committed store buffer.

Satisfying a load instruction from an older pending store instruction rather than stale backing computer memory. The youngest applicable older write supplies each requested byte; unresolved or partial overlaps require additional handling.