题解2 | #优先编码器Ⅰ#

真值表转化成公式一个一个写粗来

`timescale 1ns/1ns


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

assign Y[2] = EI & (|I[7:4]);
assign Y[1] = EI & ((|I[7:6]) | 
                    (~(|I[7:4]) & ( |I[3:2] )));
assign Y[0] = EI & (I[7] | ( ~(&I[7:6]) & I[5] ) | ( ~(&I[7:4]) & I[3] ) | ( ~(&I[7:2]) & I[1] ));
assign GS = EI & (|I[7:0]);
assign EO = EI & ~(|I[7:0] );

endmodule