Disabling printing for a single field within UVM utility macros requires a nuanced approach, as the standard uvm_info and related macros don't offer field-specific control. The solution hinges on conditionally controlling the printing based on the field's name or other identifying characteristics. There isn't a single, universally applicable command; instead, you need to modify your code strategically.
Here are several methods, along with their pros and cons:
1. Conditional Printing with if Statements
This is the most straightforward approach. You can add an if statement before each uvm_info call to check if the field should be printed. This requires knowing the field's name or some other unique identifier.
class my_transaction extends uvm_sequence_item;
rand bit [7:0] data;
rand bit [3:0] addr;
function void print_fields();
if ($sformatf("%0d", addr) != "0") begin // Print only if addr is not 0
uvm_info("MY_TRANSACTION", $sformatf("Address: %0d", addr), UVM_MEDIUM);
end
uvm_info("MY_TRANSACTION", $sformatf("Data: %0h", data), UVM_MEDIUM); //Always prints data
endfunction
endclass
Pros: Simple, easy to implement.
Cons: Requires modifying each uvm_info call individually. Can become cumbersome for many fields. Doesn't scale well.
2. Custom Macro or Function
Create a custom macro or function that encapsulates the conditional printing logic. This improves code readability and maintainability compared to scattered if statements.
function void my_uvm_info(string id, string msg, uvm_severity severity, string field_name);
if (field_name != "addr") begin // Condition to prevent printing addr
uvm_report_info(id, msg, severity);
end
endfunction
class my_transaction extends uvm_sequence_item;
rand bit [7:0] data;
rand bit [3:0] addr;
function void print_fields();
my_uvm_info("MY_TRANSACTION", $sformatf("Address: %0d", addr), UVM_MEDIUM, "addr");
my_uvm_info("MY_TRANSACTION", $sformatf("Data: %0h", data), UVM_MEDIUM, "data");
endfunction
endclass
Pros: More organized, easier to manage changes. Cons: Still requires explicit field identification in each call.
3. Field-Specific Printing Methods
Instead of suppressing printing, create separate methods for printing specific fields. This offers granular control and improves code clarity.
class my_transaction extends uvm_sequence_item;
rand bit [7:0] data;
rand bit [3:0] addr;
function void print_data();
uvm_info("MY_TRANSACTION", $sformatf("Data: %0h", data), UVM_MEDIUM);
endfunction
function void print_addr();
uvm_info("MY_TRANSACTION", $sformatf("Address: %0d", addr), UVM_MEDIUM);
endfunction
endclass
Pros: Highly organized, excellent control over what gets printed. Cons: Requires writing more code.
4. Leveraging uvm_field_int and Custom Reporting
For a more advanced solution, leverage the uvm_field_int or similar field classes and write a custom reporting mechanism. This allows for control at the field level using field attributes or callbacks.
Pros: Highly flexible and scalable. Cons: Requires a more significant code investment and deeper understanding of UVM internals. This is generally only necessary for large complex projects requiring fine-grained control.
Choosing the Right Method:
The best approach depends on your project's complexity and your need for control. For a few fields, conditional if statements or a custom macro might suffice. For many fields or complex scenarios, consider field-specific printing methods or a more sophisticated custom reporting mechanism using UVM field classes. Always prioritize code readability and maintainability. Remember that excessive logging can significantly slow down simulation, so carefully consider which information needs to be printed.
