Verilator

Source code:

    function integer ceil;
        input number;
        real number;

        // LMR 4.1.7
        // When either operand of a relational expression is a real operand then the other operand shall be converted
        // to an equivalent real value, and the expression shall be interpreted as a comparison between two real values.
        if (number > $rtoi(number))
            ceil = $rtoi(number) + 1;
        else
            ceil = number;
    endfunction

Errors on both calls to $rtoi():

%Error: ddr3.v:553: Expected real input to RTOIS
%Error: ddr3.v:552: Expected real input to RTOIS