CODEWITHSUNDEEP
system-verilog
Jan Bartels
Jan Bartels

Reputation: 348

How to do Intersections in SystemVerilog?

I would like to find the intersection between two lists in SystemVerilog. From Specman there's

var intersect: list of my_enum;
intersect = listA.all(it in listB);

Which I think is rather quaint. But best I've been able to come up with in SystemVerilog is:

typedef enum {A, B, C, D} my_enum;
my_enum listA[$] = {A, B, C};
my_enum listB[$] = {B, C, D};
my_enum intersect[$];

foreach(listA[i])
  if(listA[i] inside listB)
    intersect.push_back(listA[i]);

IEEE 1800-2012 does mention an intersect keyword but it does not seem to apply to this case. Is there a more elegant way?

Upvotes: 2

Views: 1290

Answers (1)

Greg
Greg

Reputation: 19114

intersect is a keyword used in SVAs. It is not advised to use any keyword as a variable name.

Check out IEEE Std 1800-2012 § 7.12 Array manipulation methods

I believe this is the desired equivalent function is:

myIntersect = listA.find with ( item inside {listB} );

Upvotes: 3

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