题解 | #多功能数据处理器#
多功能数据处理器
http://www.nowcoder.com/practice/e009ab1a7a4c46fb9042c09c77ee27b8
`timescale 1ns/1ns module data_select( input clk, input rst_n, input signed[7:0]a, input signed[7:0]b, input [1:0]select, output reg signed [8:0]c ); always @ (posedge clk or negedge rst_n)begin if (!rst_n) c<=9'b0; else begin case (select) 2'd0:c<=a; 2'd1:c<=b; 2'd2:c<=a+b; 2'd3:c<=a-b; endcase end end
endmodule
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