Whats the correct way to implement queue of associative array in systemverilog?

Question

I have declared a unbounded queue of 2-D associative array as below :

 static bit [15:0] array[4][*][$];

I intend to access the array using bit vector, as follows :

array[0][4'b{info[31:28]}].push_back(info[18:6]);

I get the below compile error :

** Error: (vlog-13057) driver.sv(95): Expecting numeric digits.

Whats wrong here ?

what is this 4'b{info[31:28]} supposed to mean? Just info[31:28] should be sufficient. — Serge
– Serge, Commented May 16, 2020 at 14:23
I thought explicit typecast was needed, i was wrong, it works when i remove the 4'b — user13037833
– user13037833, Commented May 16, 2020 at 14:46

dave_59 · Accepted Answer · 2020-05-16 14:45:20Z

1

I think you meant to write 4'(info[31:28]) as a cast to 4 bits, but there is no need to do that as info[31:28] is already 4 bits.

Also, do not use the wildcard [*] index in your declaration. It prevents you from using other features you might want to use later, like foreach loops and find array methods. Use [bit [3:0]] instead.

answered May 16, 2020 at 14:45

dave_59

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