Cannot sample enough valid points. (more)

\[x \cdot \sqrt{y \cdot y - z \cdot z}\]
x \cdot \sqrt{y \cdot y - z \cdot z}
double f(double x, double y, double z) {
        double r390316 = x;
        double r390317 = y;
        double r390318 = r390317 * r390317;
        double r390319 = z;
        double r390320 = r390319 * r390319;
        double r390321 = r390318 - r390320;
        double r390322 = sqrt(r390321);
        double r390323 = r390316 * r390322;
        return r390323;
}