题解 | #优先编码器Ⅰ#

将输出打包起来比较简洁：

`timescale 1ns/1ns

module encoder_83(
   input      [7:0]       I   ,
   input                  EI  ,
   
   output wire [2:0]      Y   ,
   output wire            GS  ,
   output wire            EO    
);

reg [4:0]   T; //T={Y,GS,EO}

always@(*)begin
    if(!EI)begin
        T = 5'b0;
    end
    else begin
        casex(I)
            8'b0000_0000: T = 5'b0_0001;
            8'b1xxx_xxxx: T = 5'b1_1110;
            8'b01xx_xxxx: T = 5'b1_1010;
            8'b001x_xxxx: T = 5'b1_0110;
            8'b0001_xxxx: T = 5'b1_0010;
            8'b0000_1xxx: T = 5'b0_1110;
            8'b0000_01xx: T = 5'b0_1010;
            8'b0000_001x: T = 5'b0_0110;
            8'b0000_0001: T = 5'b0_0010;
        endcase
    end
end

assign {Y,GS,EO} = T;

endmodule