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 r620422 = x;
        double r620423 = y;
        double r620424 = r620423 * r620423;
        double r620425 = z;
        double r620426 = r620425 * r620425;
        double r620427 = r620424 - r620426;
        double r620428 = sqrt(r620427);
        double r620429 = r620422 * r620428;
        return r620429;
}