In the code fragment below I'm getting this error:
Source info:
x.data[theword][thebyteH : thebyteL] = $urandom_range(0,255) ; 'this' is not an elaboration-time constant. To correct the error you may convert this const variable to a parameter or a localparam.
The geometry of the data record, just a memory, is declared in the definition_pkg. A data record object is created in the Base_txn and I can access it directly like so:
x.data[0][7:0] = x.frameID ;
I don't know why am I getting an elaboration time error since all that is happening (I think) in for loop is that I'm indexing an already existing object.
Any suggestions, explanation, or solutions appreciated.
definition_pkg.svh
`define REC_DATAWIDTH 32
`define REC_ROWS 16
typedef bit[`REC_DATAWIDTH-1:0] DataRec [`REC_ROWS] ;
sequences.sv
class Base_txn extends uvm_sequence_item;
rand DataRec data;
...
class sequencethingy extends uvm_sequence#(Base_txn);
...
int byte4val ;
int theword ;
int thebyteH ;
int thebyteL ;
// -----------------------------------------------------------------------
function void build_S (ref Base_txn x);
...
x.data[0][7:0] = x.frameID ;
...
for (int i = 8 ; i <= (byte4val+8) ; i++) // byte8 is the location of S[0]
begin
theword = i/4 ;
thebyteL = 8*(i%4) ;
thebyteH = thebyteL + 7 ;
x.data[theword][thebyteH : thebyteL] = $urandom_range(0,255) ;
end
endfunction
...
task body();
Base_txn wd_tx;
...
build_S(wd_tx) ; // give the processor some data
