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module duv (
input logic clk,
input logic op_start,
input logic [1:0] operation,
input logic [7:0] operand_a,
input logic [7:0] operand_b,
output logic [15:0] result
);
logic [15:0] result_tmp;
always_ff @(posedge clk)
begin
if( op_start == 1'b1)
begin
case (operation)
0: result_tmp = operand_a + operand_b;
1: result_tmp = operand_a * operand_b;
2: result_tmp = operand_a | operand_b;
3: result_tmp = operand_a & operand_b;
endcase
end
result <= result_tmp;
end
endmodule : duv
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