priority if
Priority if evaluates all the conditions in sequential order.
In the following conditions simulator issue a run time error/warning
- No condition is true or final if doesn’t have corresponding else
priority if examples
In the below example,
No condition is true or final if doesn’t have corresponding else.
value of a=50,b=20 and c=40. conditions a<b and a<c are false,
therefore simulator issue a run time warning.
“RT Warning: No condition matches in ‘priority if’ statement.”
module priority_if; //variables declaration int a,b,c; initial begin //initialization a=50; b=20; c=40; priority if ( a < b ) $display("\t a is less than b"); else if ( a < c ) $display("\t a is less than c"); end endmodule
Simulator Output
RT Warning: No condition matches in 'priority if' statement.
priority if example 2
In the below example,
value of a=10,b=20 and c=40.
conditions a<b and a<c are true, as it is priority based, simulator
considers the first match. therefore there will be no simulator warning message.
module priority_if; //variables declaration int a,b,c; initial begin //initialization a=10; b=20; c=40; priority if ( a < b ) $display("\t a is less than b"); else if ( a < c ) $display("\t a is less than c"); else $display("\t a is greater than b and c"); end endmodule
Simulator Output
a is less than b