Abstract
An in-flight history buffer, a shift register indexed by pipeline stage, tracks resource state updates still propagating through a multi-stage multiplier pipeline. Hazard detection compares the resource identifier of an incoming transaction against the buffer entries, and on a match forwards the uncommitted updated state in place of the stale state. Within the hazard window the elapsed-time operand equals a known small integer i+k, so single-cycle combinational constant-scaling logic forms the product r×(i+k). This product collapse bypasses the multiplier pipeline without duplicated multipliers or timestamp subtraction logic, and the transaction completes in the same cycle slot it would have occupied had no hazard occurred, with no pipeline bubble inserted. Every transaction therefore sees coherent state at fixed latency and line rate, as in token bucket metering on a custom networking chip.
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Recommended Citation
N/A, "Zero-Stall Hazard Resolution for Pipelined Multipliers via Cycle-Indexed Product Collapse", Technical Disclosure Commons, ()
https://www.tdcommons.org/dpubs_series/12349