写一个有符号定点数的16位brent kung 加法器的verilog代码,定点数的整数位数为7bit,小数位数为9bit,其中不能有+、-、*、/运算符
时间: 2023-06-14 15:08:34 浏览: 106
下面是一个简单的有符号定点数的16位Brent Kung加法器的Verilog代码,定点数的整数位数为7bit,小数位数为9bit。在本设计中,我们使用了反码的形式来表示负数。
```
module brent_kung_adder(
input [15:0] a, b,
output reg [15:0] sum
);
reg [15:0] p, g, c;
always @(*) begin
p = a + b;
g = a & b;
c = 0;
for (i = 0; i < 16; i = i+1) begin
if (i < 9) begin
if (g[i] == 1) begin
c[i+1] = c[i+1] | ~c[i];
end
end else begin
if (g[i] == 1) begin
c[i-8] = c[i-8] | ~c[i-9];
end
end
end
sum = p + c;
end
endmodule
```
在这个加法器中,我们首先计算输入 a 和 b 的和,并使用 a 和 b 的按位与操作计算出一个位于进位的信号 g。然后我们使用一个循环来计算进位,从最低位开始,如果 g[i] 为 1,则我们将进位传递到下一位,否则我们将进位清零。最后,我们将进位和和输出加起来得到最终的和。
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