\frac{\left(-b\right) + \sqrt{b \cdot b - \left(4 \cdot a\right) \cdot c}}{2 \cdot a}\begin{array}{l}
\mathbf{if}\;b \le -4.829903230896134050158793286773621805382 \cdot 10^{148}:\\
\;\;\;\;1 \cdot \left(\frac{c}{b} - \frac{b}{a}\right)\\
\mathbf{elif}\;b \le 1.058331905530479345989188577279018272684 \cdot 10^{-144}:\\
\;\;\;\;\frac{\left(-b\right) + \sqrt{b \cdot b - \left(4 \cdot a\right) \cdot c}}{2 \cdot a}\\
\mathbf{elif}\;b \le 400482480739649191422756162656796672:\\
\;\;\;\;\frac{\frac{0 + 4 \cdot \left(a \cdot c\right)}{\left(-b\right) - \sqrt{b \cdot b - \left(4 \cdot a\right) \cdot c}}}{2 \cdot a}\\
\mathbf{else}:\\
\;\;\;\;-1 \cdot \frac{c}{b}\\
\end{array}double f(double a, double b, double c) {
double r105628 = b;
double r105629 = -r105628;
double r105630 = r105628 * r105628;
double r105631 = 4.0;
double r105632 = a;
double r105633 = r105631 * r105632;
double r105634 = c;
double r105635 = r105633 * r105634;
double r105636 = r105630 - r105635;
double r105637 = sqrt(r105636);
double r105638 = r105629 + r105637;
double r105639 = 2.0;
double r105640 = r105639 * r105632;
double r105641 = r105638 / r105640;
return r105641;
}
double f(double a, double b, double c) {
double r105642 = b;
double r105643 = -4.829903230896134e+148;
bool r105644 = r105642 <= r105643;
double r105645 = 1.0;
double r105646 = c;
double r105647 = r105646 / r105642;
double r105648 = a;
double r105649 = r105642 / r105648;
double r105650 = r105647 - r105649;
double r105651 = r105645 * r105650;
double r105652 = 1.0583319055304793e-144;
bool r105653 = r105642 <= r105652;
double r105654 = -r105642;
double r105655 = r105642 * r105642;
double r105656 = 4.0;
double r105657 = r105656 * r105648;
double r105658 = r105657 * r105646;
double r105659 = r105655 - r105658;
double r105660 = sqrt(r105659);
double r105661 = r105654 + r105660;
double r105662 = 2.0;
double r105663 = r105662 * r105648;
double r105664 = r105661 / r105663;
double r105665 = 4.004824807396492e+35;
bool r105666 = r105642 <= r105665;
double r105667 = 0.0;
double r105668 = r105648 * r105646;
double r105669 = r105656 * r105668;
double r105670 = r105667 + r105669;
double r105671 = r105654 - r105660;
double r105672 = r105670 / r105671;
double r105673 = r105672 / r105663;
double r105674 = -1.0;
double r105675 = r105674 * r105647;
double r105676 = r105666 ? r105673 : r105675;
double r105677 = r105653 ? r105664 : r105676;
double r105678 = r105644 ? r105651 : r105677;
return r105678;
}




Bits error versus a




Bits error versus b




Bits error versus c
Results
| Original | 34.3 |
|---|---|
| Target | 20.9 |
| Herbie | 8.9 |
if b < -4.829903230896134e+148Initial program 61.7
Taylor expanded around -inf 2.8
Simplified2.8
if -4.829903230896134e+148 < b < 1.0583319055304793e-144Initial program 11.2
if 1.0583319055304793e-144 < b < 4.004824807396492e+35Initial program 35.7
rmApplied flip-+35.8
Simplified16.7
if 4.004824807396492e+35 < b Initial program 56.6
Taylor expanded around inf 4.3
Final simplification8.9
herbie shell --seed 2019294
(FPCore (a b c)
:name "The quadratic formula (r1)"
:precision binary64
:herbie-target
(if (< b 0.0) (/ (+ (- b) (sqrt (- (* b b) (* (* 4 a) c)))) (* 2 a)) (/ c (* a (/ (- (- b) (sqrt (- (* b b) (* (* 4 a) c)))) (* 2 a)))))
(/ (+ (- b) (sqrt (- (* b b) (* (* 4 a) c)))) (* 2 a)))