\frac{\left(\left(\left(\left(1 + 0.1049934947 \cdot \left(x \cdot x\right)\right) + 0.042406060400000001 \cdot \left(\left(x \cdot x\right) \cdot \left(x \cdot x\right)\right)\right) + 0.00726441819999999999 \cdot \left(\left(\left(x \cdot x\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right)\right) + 5.0640340000000002 \cdot 10^{-4} \cdot \left(\left(\left(\left(x \cdot x\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right)\right) + 1.789971 \cdot 10^{-4} \cdot \left(\left(\left(\left(\left(x \cdot x\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right)}{\left(\left(\left(\left(\left(1 + 0.77154710189999998 \cdot \left(x \cdot x\right)\right) + 0.29097386390000002 \cdot \left(\left(x \cdot x\right) \cdot \left(x \cdot x\right)\right)\right) + 0.069455576099999999 \cdot \left(\left(\left(x \cdot x\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right)\right) + 0.014000544199999999 \cdot \left(\left(\left(\left(x \cdot x\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right)\right) + 8.32794500000000044 \cdot 10^{-4} \cdot \left(\left(\left(\left(\left(x \cdot x\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right)\right) + \left(2 \cdot 1.789971 \cdot 10^{-4}\right) \cdot \left(\left(\left(\left(\left(\left(x \cdot x\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right) \cdot \left(x \cdot x\right)\right)} \cdot x\begin{array}{l}
\mathbf{if}\;x \le -8486103.70047819801 \lor \neg \left(x \le 1433.55869447987038\right):\\
\;\;\;\;\mathsf{fma}\left(0.25141790006653753, \frac{1}{{x}^{3}}, \mathsf{fma}\left(0.1529819634592933, \frac{1}{{x}^{5}}, \frac{0.5}{x}\right)\right)\\
\mathbf{else}:\\
\;\;\;\;\frac{\left(\left(-\mathsf{fma}\left(0.042406060400000001, {x}^{4}, \mathsf{fma}\left(0.1049934947 \cdot x, x, 1\right)\right)\right) + \left(-\mathsf{fma}\left(0.00726441819999999999, {x}^{6}, 5.0640340000000002 \cdot 10^{-4} \cdot {x}^{8}\right)\right)\right) - \left(1.789971 \cdot 10^{-4} \cdot {x}^{9}\right) \cdot x}{\left(\left(-\mathsf{fma}\left(0.069455576099999999, {x}^{6}, \mathsf{fma}\left(0.29097386390000002, {x}^{4}, \mathsf{fma}\left(0.77154710189999998 \cdot x, x, 1\right)\right)\right)\right) + \left(-\mathsf{fma}\left(0.014000544199999999, {x}^{8}, \left({x}^{2} \cdot \left({x}^{2} \cdot \left({x}^{2} \cdot \left(x \cdot {x}^{3}\right)\right)\right)\right) \cdot 8.32794500000000044 \cdot 10^{-4}\right)\right)\right) - \left({x}^{12} \cdot 1.789971 \cdot 10^{-4}\right) \cdot 2} \cdot x\\
\end{array}double code(double x) {
return ((double) (((double) (((double) (((double) (((double) (((double) (((double) (1.0 + ((double) (0.1049934947 * ((double) (x * x)))))) + ((double) (0.0424060604 * ((double) (((double) (x * x)) * ((double) (x * x)))))))) + ((double) (0.0072644182 * ((double) (((double) (((double) (x * x)) * ((double) (x * x)))) * ((double) (x * x)))))))) + ((double) (0.0005064034 * ((double) (((double) (((double) (((double) (x * x)) * ((double) (x * x)))) * ((double) (x * x)))) * ((double) (x * x)))))))) + ((double) (0.0001789971 * ((double) (((double) (((double) (((double) (((double) (x * x)) * ((double) (x * x)))) * ((double) (x * x)))) * ((double) (x * x)))) * ((double) (x * x)))))))) / ((double) (((double) (((double) (((double) (((double) (((double) (1.0 + ((double) (0.7715471019 * ((double) (x * x)))))) + ((double) (0.2909738639 * ((double) (((double) (x * x)) * ((double) (x * x)))))))) + ((double) (0.0694555761 * ((double) (((double) (((double) (x * x)) * ((double) (x * x)))) * ((double) (x * x)))))))) + ((double) (0.0140005442 * ((double) (((double) (((double) (((double) (x * x)) * ((double) (x * x)))) * ((double) (x * x)))) * ((double) (x * x)))))))) + ((double) (0.0008327945 * ((double) (((double) (((double) (((double) (((double) (x * x)) * ((double) (x * x)))) * ((double) (x * x)))) * ((double) (x * x)))) * ((double) (x * x)))))))) + ((double) (((double) (2.0 * 0.0001789971)) * ((double) (((double) (((double) (((double) (((double) (((double) (x * x)) * ((double) (x * x)))) * ((double) (x * x)))) * ((double) (x * x)))) * ((double) (x * x)))) * ((double) (x * x)))))))))) * x));
}
double code(double x) {
double VAR;
if (((x <= -8486103.700478198) || !(x <= 1433.5586944798704))) {
VAR = ((double) fma(0.2514179000665375, ((double) (1.0 / ((double) pow(x, 3.0)))), ((double) fma(0.15298196345929327, ((double) (1.0 / ((double) pow(x, 5.0)))), ((double) (0.5 / x))))));
} else {
VAR = ((double) (((double) (((double) (((double) (((double) -(((double) fma(0.0424060604, ((double) pow(x, 4.0)), ((double) fma(((double) (0.1049934947 * x)), x, 1.0)))))) + ((double) -(((double) fma(0.0072644182, ((double) pow(x, 6.0)), ((double) (0.0005064034 * ((double) pow(x, 8.0)))))))))) - ((double) (((double) (0.0001789971 * ((double) pow(x, 9.0)))) * x)))) / ((double) (((double) (((double) -(((double) fma(0.0694555761, ((double) pow(x, 6.0)), ((double) fma(0.2909738639, ((double) pow(x, 4.0)), ((double) fma(((double) (0.7715471019 * x)), x, 1.0)))))))) + ((double) -(((double) fma(0.0140005442, ((double) pow(x, 8.0)), ((double) (((double) (((double) pow(x, 2.0)) * ((double) (((double) pow(x, 2.0)) * ((double) (((double) pow(x, 2.0)) * ((double) (x * ((double) pow(x, 3.0)))))))))) * 0.0008327945)))))))) - ((double) (((double) (((double) pow(x, 12.0)) * 0.0001789971)) * 2.0)))))) * x));
}
return VAR;
}



Bits error versus x
Results
if x < -8486103.700478198 or 1433.5586944798704 < x Initial program 59.5
rmApplied frac-2neg59.5
Simplified59.5
Simplified59.5
Taylor expanded around inf 0.0
Simplified0.0
if -8486103.700478198 < x < 1433.5586944798704Initial program 0.0
rmApplied frac-2neg0.0
Simplified0.0
Simplified0.0
Final simplification0.0
herbie shell --seed 2020121 +o rules:numerics
(FPCore (x)
:name "Jmat.Real.dawson"
:precision binary64
(* (/ (+ (+ (+ (+ (+ 1 (* 0.1049934947 (* x x))) (* 0.0424060604 (* (* x x) (* x x)))) (* 0.0072644182 (* (* (* x x) (* x x)) (* x x)))) (* 0.0005064034 (* (* (* (* x x) (* x x)) (* x x)) (* x x)))) (* 0.0001789971 (* (* (* (* (* x x) (* x x)) (* x x)) (* x x)) (* x x)))) (+ (+ (+ (+ (+ (+ 1 (* 0.7715471019 (* x x))) (* 0.2909738639 (* (* x x) (* x x)))) (* 0.0694555761 (* (* (* x x) (* x x)) (* x x)))) (* 0.0140005442 (* (* (* (* x x) (* x x)) (* x x)) (* x x)))) (* 0.0008327945 (* (* (* (* (* x x) (* x x)) (* x x)) (* x x)) (* x x)))) (* (* 2 0.0001789971) (* (* (* (* (* (* x x) (* x x)) (* x x)) (* x x)) (* x x)) (* x x))))) x))