Function round_pipeline_kernel 

pub fn round_pipeline_kernel<const STAGES: usize>(
    clock_reset: ClockReset,
    input: CompressionInput,
    q: Q<STAGES>,
) -> (CompressionOutput, D<STAGES>)
where
    W<STAGES>: BitWidth,

Connects fixed-phase stages and aligns resettable validity with data/tag.

Inputs: clock_reset, the new request input, and q (every register’s current value). Outputs: the result leaving the last stage and d (every register’s next value). Timing: a request entering at clock t leaves at clock t + STAGES, and a new one may enter every clock.