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 r645319 = x;
        double r645320 = y;
        double r645321 = r645320 * r645320;
        double r645322 = z;
        double r645323 = r645322 * r645322;
        double r645324 = r645321 - r645323;
        double r645325 = sqrt(r645324);
        double r645326 = r645319 * r645325;
        return r645326;
}