Example: Mealy machine reduce 1s

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module reduce (clk, reset, in, out); input clk, reset, in; output out; parameter zero = 0, one = 1; // states

reg state; // state register assign out = reduce_output(in, state);

always @(posedge clk) if (reset) state = zero;

else state = next_state(in, state);

function reduce_output;

input in, state;

case (state)

zero: reduce_output = 0; one: if (~in) reduce_output = 0;

else reduce_output = 1; endcase endfunction