double f(double x) {
        double r858192 = 1.0;
        double r858193 = x;
        double r858194 = r858193 * r858193;
        double r858195 = r858192 - r858194;
        double r858196 = -r858195;
        double r858197 = exp(r858196);
        return r858197;
}

double f(double x) {
        double r858198 = x;
        double r858199 = -1.0;
        double r858200 = fma(r858198, r858198, r858199);
        double r858201 = exp(r858200);
        return r858201;
}

e^{-\left(1 - x \cdot x\right)}

e^{(x \cdot x + -1)_*}