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 r637401 = x;
        double r637402 = y;
        double r637403 = r637402 * r637402;
        double r637404 = z;
        double r637405 = r637404 * r637404;
        double r637406 = r637403 - r637405;
        double r637407 = sqrt(r637406);
        double r637408 = r637401 * r637407;
        return r637408;
}