Array reduction methods

The array reduction methods are used to reduce the array to a single value with the optional use of the ‘with’ clause.

The reduction methods can be applied on any unpacked array. For a ‘with’ clause, boolean or arithmetic reduction operation must be specified.

Methods	Description
and	Returns bitwise AND (&) of all elements of the array.
or	Returns bitwise OR (\|) of all elements of the array.
xor	Returns bitwise XOR (^) of all elements of the array.
sum	Returns the sum of all elements of the array.
product	Returns product of all elements of the array.

Note: If the ‘with’ clause is specified, the above reduction methods return value based on evaluating the expression for each array element.

Array reduction methods Example

module arr_ordering_ex;
  int arr[8] = '{5,6,9,2,3,4,6,10};
  int que[$];
  initial begin
    que.push_back(45);
    que.push_back(30);
    que.push_back(99);
    que.push_back(51);
    que.push_back(85);
    
    $display("-------------------------------------");
    $display("------ Printing array and queue -----");
    $display("-------------------------------------");
    print_array_queue();
    
    $display("-------------------------------------");
    $display("------------ Methods ----------------");
    $display("-------------------------------------");
    
    $display("and for: arr = %0h and queue = %0h", arr.and(), que.and());
    $display("or for : arr = %0h and queue = %0h", arr.or(), que.or());
    $display("xor for: arr = %0h and queue = %0h", arr.xor(), que.xor());
    $display("sum for: arr = %0d and queue = %0d", arr.sum(), que.sum());
    $display("product for: arr = %0d and queue = %0d", arr.product(), que.product());  
  end
  
  //-------------------------
  // print array and queue
  //-------------------------
  
  function void print_array_queue();
    $display("Array = %p", arr);
    $display("Queue = %p", que);
  endfunction
endmodule

Output:

-------------------------------------
------ Printing array and queue -----
-------------------------------------
Array = '{5, 6, 9, 2, 3, 4, 6, 10}
Queue = '{45, 30, 99, 51, 85}
-------------------------------------
------------ Methods ----------------
-------------------------------------
and for: arr = 0 and queue = 0
or for : arr = f and queue = 7f
xor for: arr = 3 and queue = 36
sum for: arr = 45 and queue = 310
product for: arr = 388800 and queue = 579372750

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