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 r663375 = x;
        double r663376 = y;
        double r663377 = r663376 * r663376;
        double r663378 = z;
        double r663379 = r663378 * r663378;
        double r663380 = r663377 - r663379;
        double r663381 = sqrt(r663380);
        double r663382 = r663375 * r663381;
        return r663382;
}