module test; typedef packed struct { bit [9:-1][2:0] a; ///REQ-EXT-10001, REQ-EXT-10004 bit [3:0] b; } packed ST1; typedef struct { ST1 st1; ST1 st2[2:0]; } ST2; initial begin ST2 st2; st2 = '{2'b01, '{3'b1, 3'b0, 12'b1},'{4'b0011,'{3'b1,3'b0,12'b0},'{3'b1,3'b0,12'b0}}}; $display("st2 before:%0d '%h", st2.st2[0].b, st2.st2[0].a); ST2 st3=st2; st3.st2[0].b = st3.st2[0].b+1; $display("st2 after:%d '%h', st3: %0d '%h, %0d '%h", st2.st2[0].b, st2.st2[0].a, st3.st2[0].b, st3.st2[0].a, st3.st2[1].b, st3.st2[1].a);//CHECK-001:'{a:'h1}, st2:'{'a:'h1}, '{a:'h0},'{a:h1}}} end endmodule how should I modify this piece of system verilog code so that it can be compiled successfully by vcs? the assignment of st2 now is too complicated, can you modify it to a simpler vresion so that it can be compiled successfully by vcs?
时间: 2024-03-20 08:38:59 浏览: 16
To make this code compile successfully in VCS, you need to make a few modifications:
1. Change the keyword "typedef" to "typedef_packed" for both ST1 and ST2.
2. Change the keyword "initial" to "always @ (posedge clk)" or any other appropriate always block.
3. Declare a clk signal and assign it in the always block.
4. Simplify the assignment of st2 to the following:
ST2 st2 = '{ {10{1'b1}}, '{3'b1, 3'b0, 12'hFFF} , '{4'b0011, '{3'b1, 3'b0, 12'h000}, '{3'b1, 3'b0, 12'h000}}};
Here is the modified code:
```
module test;
typedef_packed struct {
bit [9:-1][2:0] a; ///REQ-EXT-10001, REQ-EXT-10004
bit [3:0] b;
} packed ST1;
typedef_packed struct {
ST1 st1;
ST1 st2[2:0];
} ST2;
logic clk;
always @ (posedge clk) begin
ST2 st2 = '{ {10{1'b1}}, '{3'b1, 3'b0, 12'hFFF} , '{4'b0011, '{3'b1, 3'b0, 12'h000}, '{3'b1, 3'b0, 12'h000}}};
$display("st2 before:%0d '%h", st2.st2[0].b, st2.st2[0].a);
ST2 st3=st2;
st3.st2[0].b = st3.st2[0].b+1;
$display("st2 after:%d '%h', st3: %0d '%h, %0d '%h", st2.st2[0].b, st2.st2[0].a, st3.st2[0].b, st3.st2[0].a, st3.st2[1].b, st3.st2[1].a);//CHECK-001:'{a:'h1}, st2:'{'a:'h1}, '{a:'h0},'{a:h1}}}
end
endmodule
```
相关推荐
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![ppt](https://img-home.csdnimg.cn/images/20210720083527.png)
![doc](https://img-home.csdnimg.cn/images/20210720083327.png)
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![docx](https://img-home.csdnimg.cn/images/20210720083331.png)
![](https://img-home.csdnimg.cn/images/20210720083646.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)