题解 | #多功能数据处理器#
多功能数据处理器
https://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 unsigned[1:0]select,
output reg signed [8:0]c
);
always@(posedge clk or negedge rst_n)begin
if(!rst_n)begin
c<=0;
end
else begin
case(select)
2'd0:begin
c <= a;
end
2'd1:begin
c <= b;
end
2'd2:begin
c <= {1'b0,a}+{1'b0,b};
end
2'd3:begin
c <= {1'b0,a}-{1'b0,b};
end
endcase
end
end
endmodule
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