yosys/examples/smtbmc/demo4.v

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2016-08-27 07:30:36 -05:00
// Demo for "final" smtc constraints
module demo4(input clk, rst, inv2, input [15:0] in, output reg [15:0] r1, r2);
always @(posedge clk) begin
if (rst) begin
r1 <= in;
r2 <= -in;
end else begin
r1 <= r1 + in;
r2 <= inv2 ? -(r2 - in) : (r2 - in);
end
end
endmodule