Check for +/- infinity

SystemVerilog
1

Is there a way to check if a real is +/- inf?

    tmp=0;
    tmp2=1.0/tmp;
    $display("%e, %e",tmp,tmp2);
    if(tmp2==????) begin
        $display("INF");
    end

what should do at the place of the question marks?
E.g. something like isinf() in C++.

tmp2==1.0/0.0 || tmp2==-1.0/0.0 does seem to work for the few cases I tried? Anything better?