Top (controller.sv)

Source:

• rtl/systolic_gauss_jordan/controller.sv

controller is the top for one Gauss-Jordan run. It owns run-level timing only and delegates row feeding to \input.

Function

On start_i, the module latches the run configuration, starts the feeder, and begins a local cycle counter. During the run it optionally emits a one-cycle reduce pulse. When the configured run window completes, it pulses done_o and returns idle.

The data path is:

controller -> \input -> trapeziod_mesh

Interface contract

• start_i is single-shot while idle

• rows_i selects how many A/B rows the feeder issues

• reduce_start_i is the step-local cycle at which reduce is asserted

• run_cycles_i == 0 falls back to 3N + rows_i + L - 2

• busy_o stays high for the active run

• done_o is a one-cycle completion pulse

• error_o flags invalid control use such as restart-while-busy