仿真时，值赋不上。s_2,什么的都是高阻态
always @(posedge clk or negedge rst_n)
if( !rst_n )begin
b_1<=32'd0;
a_1<=32'd0;
c_i1<=1'b0;
b_2<=32'd0;
a_2<=32'd0;
c_i2<=1'b0;
s_o<=32'h28333;
preprData[79:0]<=80'd0;end
else case (i)
4'd0: if (ONE_Done_Sig_pos)
i<=i+1'b1;
4'd1: begin b_2<=rData[32:0];
a_2<=s_o;
i<=i+1'b1;end
4'd2: begin preprData[31:0]<=s_2;
preprData[79:32]<=rData[79:32];
i<=i+1'b0;end
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