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 r878946 = x;
        double r878947 = y;
        double r878948 = r878947 * r878947;
        double r878949 = z;
        double r878950 = r878949 * r878949;
        double r878951 = r878948 - r878950;
        double r878952 = sqrt(r878951);
        double r878953 = r878946 * r878952;
        return r878953;
}