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 r690307 = x;
        double r690308 = y;
        double r690309 = r690308 * r690308;
        double r690310 = z;
        double r690311 = r690310 * r690310;
        double r690312 = r690309 - r690311;
        double r690313 = sqrt(r690312);
        double r690314 = r690307 * r690313;
        return r690314;
}