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