1 RTL代码
module top_compare(
input I_sys_clk,
input I_reset_n,
input [3:0] I_a ,
input [3:0] I_b ,
output reg O_greater,
output reg O_less ,
output reg O_equal
);
always @(posedge I_sys_clk or negedge I_reset_n)
begin
if(~I_reset_n)
begin
O_greater I_b[6:5] ? 1 : 0。最终，如果I_a > I_b，则CO[3] == 1。否则等于0。
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是
否
是
否
是
否
是
否
是
开始
I_a[1:0]==I_a[1:0] ?
CO[0] = 0
CO[0] = I_a[1:0] > I_b[1:0] ? 1 : 0
I_a[3:2]==I_a[3:2] ?
CO[1] = CO[0]
CO[1] = I_a[3:2] > I_b[3:2] ? 1 : 0
I_a[3:2]==I_a[5:4] ?
CO[2] = CO[1]
CO[2] = I_a[5:4] > I_b[5:4] ? 1 : 0
I_a[6:5]==I_a[6:5] ?
CO[3] = CO[2]
CO[3] = I_a[6:5] > I_b[6:5] ? 1 : 0
CO[3] = 1 ?
I_a > I_b
结束
