使用$signed()和$unsigned进行有符号数与无符号数的转换 reg [7:0] regA, regB; reg signed [7:0] regS; regA = $unsigned(-4); // regA = 8'b11111100 regB = $unsigned(-4'sd4); // regB = 8'b00001100 regS = $signed (4'b1100); // regS = -4
