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 r29910025 = x;
        double r29910026 = y;
        double r29910027 = r29910026 * r29910026;
        double r29910028 = z;
        double r29910029 = r29910028 * r29910028;
        double r29910030 = r29910027 - r29910029;
        double r29910031 = sqrt(r29910030);
        double r29910032 = r29910025 * r29910031;
        return r29910032;
}